Static contact insulation cleaning device under live-line condition of medium-voltage switchboard buscouple interval in nuclear power plant

Abstract

The utility model discloses a static contact insulation cleaning device for a medium-voltage switchboard bus coupler interval of a nuclear power plant in an electrified state. The static contact insulation cleaning device comprises a cleaning mechanism, a connecting mechanism, a driving mechanism, a dust collection mechanism and an operating mechanism. According to the static contact insulation cleaning device, the cleaning mechanism is used for cleaning the static contact of an electrified bus coupler interval, the dust collection mechanism is used for sucking dust on the static contact, and when a maintenance window cannot meet the requirement for simultaneous stop of a segmented bus, the risk of arc discharge of the contact caused by the phenomena such as dust accumulation and dirt in the static contact can be eliminated, and the service life of the static contact is prolonged. The cleaning mechanism, the connecting mechanism and the driving mechanism are detachable, replaceable and spliced, replacement and installation are convenient, operation is easy and convenient, people do not need to enter the interval, cleaning work can be effectively carried out under the electrified condition of the bus coupler interval, the operating environment of the bus coupler interval is effectively improved, and the service life is prolonged; and meanwhile, the electric shock risk caused by an electrified interval to personnel is completely eradicated.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power plant maintenance, and in particular to a static contact insulation cleaning device for a medium-voltage switchboard bus coupler bay under energized conditions in a nuclear power plant. Background Technology

[0002] The medium-voltage switchboard systems in nuclear power plants all employ armored metal-enclosed switchgear. This switchgear has a single-layer, centrally located structure, with each compartment isolated from the others by metal partitions. Components within the same compartment use air as the insulating medium. Due to the planned maintenance schedules of nuclear power plants, maintenance activities are typically carried out within specific timeframes. While the unit-side medium-voltage switchboard system can effectively perform maintenance on the bus tie bay, the presence of a bus tie bay switch between the unit-side and external medium-voltage systems often results in one side of the stationary contact remaining permanently energized. This poses a high risk of electric shock during bus tie bay maintenance. However, neglecting maintenance can leave this bay in a state of prolonged neglect. Furthermore, the moving and stationary contacts are key areas prone to arcing in medium-voltage switchgear. In this situation, the equipment condition of the bus tie bay presents certain vulnerabilities, potentially leading to busbar failure in severe cases.

[0003] Statistics show that disagreements regarding the maintenance of the bus tie bay have occurred multiple times in the medium-voltage switchboard system of nuclear power plants. The current solution involves using insulated gloves to enter the bus tie bay and clean the stationary contacts, using an alcohol-soaked cloth wrapped around the arm to clean both the inner and outer walls of the contacts.

[0004] Meanwhile, the bus tie bay section of the medium-voltage switchboard is in a state of long-term isolation. With the moving and stationary contacts separated, dust is more likely to accumulate on the inner wall of the stationary contacts over time, especially in equipment that has only recently been put into operation. In this situation, cleaning the stationary contacts becomes complex and risky when one side of the bus tie bay is always energized. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a static contact insulation cleaning device for the bus coupler bay of a medium-voltage switchboard in a nuclear power plant under energized conditions, so as to solve the problem that dust easily accumulates on the inner wall of the static contact when the system of the bus coupler bay of the medium-voltage switchboard is in a long-term isolated state and the moving and static contacts are separated.

[0006] The technical solution adopted by this utility model to solve its technical problem is: to construct a static contact insulation cleaning device for the bus coupler bay of a medium-voltage switchboard in a nuclear power plant under energized conditions, which includes a cleaning mechanism, a connecting mechanism, a driving mechanism, a dust collection mechanism and an operating mechanism.

[0007] The cleaning mechanism is used to clean the stationary contact.

[0008] Both ends of the connecting mechanism can be detachably connected to the cleaning mechanism and the driving mechanism. The connecting mechanism is used to transmit the torque output by the driving mechanism to the cleaning mechanism.

[0009] The dust extraction mechanism is connected to the connecting mechanism and is used to extract dust from the stationary contact head;

[0010] The operating mechanism is connected to the driving mechanism and is used to control the operation of the driving mechanism and the vacuuming mechanism.

[0011] In some embodiments, the cleaning mechanism includes a cleaning plug connected to the connecting mechanism, a cleaning connection fastener connected to the cleaning plug, a brush mounting plate connected to the cleaning connection fastener, and a cleaning brush connected to the brush mounting plate.

[0012] In some embodiments, the connection mechanism includes a connector plug corresponding to the cleaning plug, a connecting rod connected to the connector plug, and a mating plug connected to the connecting rod.

[0013] In some embodiments, the connecting mechanism further includes a front rolling bearing, a rear rolling bearing, an insulating protective sleeve, and a connecting fixing seat;

[0014] The front rolling bearing and the rear rolling bearing are separately installed at both ends inside the insulating protective sleeve, and both the front rolling bearing and the rear rolling bearing are sleeved on the outside of the connecting rod. The insulating protective sleeve is connected to the connecting fixing seat, and the connecting fixing seat is used to connect with the driving mechanism.

[0015] In some embodiments, the vacuuming mechanism includes a generator mounting base, a vacuum generator, a ventilation duct, and duct fasteners;

[0016] The generator mounting base is connected to the connecting fixing base, the vacuum generator is connected to the generator mounting base, the ventilation duct is connected to the vacuum generator, and the duct fastener is connected to the insulating protective sleeve and used to fix the position of the ventilation duct.

[0017] In some embodiments, the ventilation duct is provided with a filter screen.

[0018] In some embodiments, the drive mechanism includes a motor mounting base, a drive connection base, a speed-adjustable motor, and a motor drive shaft;

[0019] The connecting fixing seat is provided with an internal thread portion, and the driving connecting seat is provided with an external thread portion corresponding to the internal thread portion. The driving connecting seat is fixedly connected to the motor fixing seat.

[0020] The adjustable speed motor is installed in the motor mounting base and is used to drive the motor drive shaft to rotate. The motor drive shaft is provided with a drive shaft insertion part corresponding to the mating plug.

[0021] In some embodiments, the motor mounting bracket is provided with a motor cooling fan and a motor power switch.

[0022] In some embodiments, the operating mechanism includes an operating base, a motor speed control button, and a vacuum generator switch button;

[0023] The operating base is connected to the motor mounting base, and the motor speed control button and the vacuum generator switch button are connected to the operating base.

[0024] In some embodiments, the operating mechanism further includes a power cord and a power plug;

[0025] The power cord is connected to one end of the operating base, and the power plug is connected to the power cord.

[0026] The present invention has the following beneficial effects: The stationary contact insulation cleaning device uses a cleaning mechanism to clean the stationary contacts of the energized bus coupler bay and a dust suction mechanism to remove dust from the stationary contacts. When the maintenance window cannot meet the simultaneous shutdown of the segmented busbars, it can eliminate the risk of contact arcing caused by the accumulation of dust and dirt inside the stationary contacts. Moreover, the cleaning mechanism, connecting mechanism, and driving mechanism are detachable, replaceable, and splicable, which facilitates replacement and installation. The operation is simple and convenient, and no personnel need to enter the bay. It can effectively carry out cleaning work on the energized bus coupler bay, effectively improve the operating environment of the bus coupler bay, extend its service life, and eliminate the risk of electric shock to personnel from the energized bay. Attached Figure Description

[0027] 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:

[0028] Figure 1 This is a schematic diagram of the overall structure of the static contact insulation cleaning device under energized conditions in the bus tie bay of the medium-voltage switchboard in a nuclear power plant, according to some embodiments of this utility model.

[0029] Figure 2 This is a schematic diagram of the cleaning mechanism in some embodiments of the present invention;

[0030] Figure 3These are schematic diagrams of the connecting mechanism and the dust collection mechanism in some embodiments of this utility model;

[0031] Figure 4 This is a schematic diagram of the drive mechanism in some embodiments of the present invention;

[0032] Figure 5 This is a schematic diagram of the operating mechanism in some embodiments of the present invention. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] Please see Figures 1 to 5This invention relates to a device for cleaning the stationary contacts of a medium-voltage switchboard busbar bay in a nuclear power plant under energized conditions, as described in some embodiments of the present invention. The device includes a cleaning mechanism 1, a connecting mechanism 2, a driving mechanism 3, a dust extraction mechanism 4, and an operating mechanism 5. The cleaning mechanism 1 is used to clean the stationary contacts. Both ends of the connecting mechanism 2 are detachably connected to the cleaning mechanism 1 and the driving mechanism 3, and the connecting mechanism 2 is used to transmit the torque output from the driving mechanism 3 to the cleaning mechanism 1. The dust extraction mechanism 4 is connected to the connecting mechanism 2 and is used to extract dust from the stationary contacts. The operating mechanism 5 is connected to the driving mechanism 3 and is used to control the operation of the driving mechanism 3 and the dust extraction mechanism 4.

[0036] Understandably, this stationary contact insulation cleaning device uses the cleaning mechanism 1 to clean the stationary contacts of the energized bus coupler bay and the dust suction mechanism 4 to remove dust from the stationary contacts. When the maintenance window cannot accommodate the simultaneous shutdown of the segmented busbars, it can eliminate the risk of arcing caused by the accumulation of dust and dirt inside the stationary contacts. Furthermore, the cleaning mechanism 1, the connecting mechanism 2, and the driving mechanism 3 are detachable, replaceable, and combinable, facilitating replacement and installation. The operation is simple and convenient, requiring no personnel to enter the bay. It can effectively carry out cleaning work on the energized bus coupler bay, effectively improving the operating environment of the bus coupler bay, extending its service life, and eliminating the risk of electric shock to personnel from the energized bay.

[0037] like Figure 2 As shown, the cleaning mechanism 1 includes a cleaning plug 11 connected to the connecting mechanism 2, a cleaning connection fastener 12 connected to the cleaning plug 11, a brush mounting plate 13 connected to the cleaning connection fastener 12, and a cleaning brush 14 connected to the brush mounting plate 13. The cleaning plug 11 can be a hexagonal plug. The cleaning plug 11 and the cleaning connection fastener 12, as well as the cleaning connection fastener 12 and the brush mounting plate 13, can be connected by bolts. During the cleaning process, the cleaning brush 14 can maintain contact with the stationary contact, so that the bristles on the cleaning brush 14 continuously sweep the surface of the stationary contact, thereby cleaning the stationary contact.

[0038] like Figure 3 As shown, the connecting mechanism 2 includes a connecting plug 21 corresponding to the cleaning plug 11, a connecting rod 22 connected to the connecting plug 21, and a mating plug 23 connected to the connecting rod 22. The mating plug 23 can be a hexagonal plug corresponding to the cleaning plug 11, and the connecting rod 22 can drive the cleaning mechanism 1 to move together.

[0039] Furthermore, the connecting mechanism 2 also includes a front rolling bearing 24, a rear rolling bearing 25, an insulating protective sleeve 26, and a connecting fixing seat 27. The front rolling bearing 24 and the rear rolling bearing 25 are separately installed at both ends inside the insulating protective sleeve 26, and both are sleeved on the outside of the connecting rod 22. The insulating protective sleeve 26 is connected to the connecting fixing seat 27, which is used to connect with the drive mechanism 3. The front rolling bearing 24 and the rear rolling bearing 25 provide positioning support for the rotation of the connecting rod 22, and both are fixedly connected to the insulating protective sleeve 26. The insulating protective sleeve 26 can be made of insulating material to avoid the high risk of electric shock to personnel operating in energized intervals. The specifications of the insulating protective sleeve 26 can be replaced according to the actual working conditions on site.

[0040] For example Figure 3 As shown, the dust collection mechanism 4 includes a generator mounting base 41, a vacuum generator 42, a ventilation duct 43, and duct fasteners 44. The generator mounting base 41 is connected to the connecting fixing base 27, the vacuum generator 42 is connected to the generator mounting base 41, the ventilation duct 43 is connected to the vacuum generator 42, and the duct fasteners 44 are connected to the insulating protective sleeve 26 and used to fix the position of the ventilation duct 43. When the vacuum generator 42 is working, it can generate negative pressure to suck the dust on the stationary contact into the ventilation duct 43, thus completing the extraction of accumulated dust inside the stationary contact. The ventilation duct 43 is equipped with a filter screen 45, which can filter out larger dust particles sucked into the ventilation duct 43.

[0041] like Figure 4 As shown, the drive mechanism 3 includes a motor mounting base 31, a drive connecting base 32, a variable speed motor 33, and a motor drive shaft 34. The connecting base 27 has an internal thread 271, and the drive connecting base 32 has an external thread 321 corresponding to the internal thread 271. The drive connecting base 32 is fixedly connected to the motor mounting base 31. The variable speed motor 33 is installed inside the motor mounting base 31 and drives the motor drive shaft 34 to rotate. The motor drive shaft 34 has a drive shaft insertion part 341 corresponding to the mating plug 23. Specifically, the connecting base 27 and the drive connecting base 32 are threadedly connected. The connecting base 27 is fixed relative to the motor mounting base 31, and the mating plug 23 can be a rectangular plug that can be inserted into the drive shaft insertion part 341, so that when the variable speed motor 33 starts, the motor drive shaft 34 can drive the connecting rod 22 and the entire cleaning mechanism 1 to rotate.

[0042] In addition, the motor mounting base 31 is equipped with a motor cooling fan 36 and a motor power switch 37. The motor cooling fan 36 is used for cooling the adjustable speed motor 33, and the motor power switch 37 controls the power switch of the adjustable speed motor 33.

[0043] like Figure 5 As shown, the operating mechanism 5 includes an operating base 51, a motor speed control button 52, and a vacuum generator switch button 53. The operating base 51 is connected to the motor mounting base 31, and the motor speed control button 52 and the vacuum generator switch button 53 are connected to the operating base 51. The operating base 51 can be a motor-protected insulated handheld device. The motor speed control button 52 can adjust the speed of the adjustable-speed motor 33, and the vacuum generator switch button 53 can control the switching on and off of the vacuum generator 42. The operating mechanism 5 also includes a power cord 54 and a power plug 55. The power cord 54 is connected to one end of the operating base 51, and the power plug 55 is connected to the power cord 54, allowing connection to an external power source.

[0044] 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 static contact insulation cleaning device for a bus-tie compartment of a medium voltage distribution panel in a nuclear power plant, characterized in that, The utility model relates to a cleaning device for static contact, which comprises a cleaning mechanism (1), a connecting mechanism (2), a driving mechanism (3), a dust suction mechanism (4) and an operating mechanism (5). The cleaning mechanism (1) is used for cleaning the static contact. The two ends of the connecting mechanism (2) are detachably connected to the cleaning mechanism (1) and the driving mechanism (3), and the connecting mechanism (2) is used for transmitting the torque output by the driving mechanism (3) to the cleaning mechanism (1). The dust suction mechanism (4) is connected to the connecting mechanism (2) and is used for sucking the dust on the static contact. The operating mechanism (5) is connected to the driving mechanism (3) and is used for controlling the operation of the driving mechanism (3) and the dust suction mechanism (4).

2. The charged static contact insulation cleaning device for bus differential gap of medium voltage switchboard in nuclear power plant according to claim 1, characterized in that, The cleaning mechanism (1) comprises a cleaning plug (11) connected to the connecting mechanism (2), a cleaning connection fixing piece (12) connected to the cleaning plug (11), a brush mounting disc (13) connected to the cleaning connection fixing piece (12), and a cleaning brush (14) connected to the brush mounting disc (13).

3. The device according to claim 2, characterized in that, The connecting mechanism (2) comprises a connecting plug (21) corresponding to the cleaning plug (11), a connecting rod (22) connected to the connecting plug (21), and a counterpart plug (23) connected to the connecting rod (22).

4. The device according to claim 3, characterized in that, The connecting mechanism (2) further comprises a front end rolling bearing (24), a rear end rolling bearing (25), an insulating protective sleeve (26), and a connecting fixing seat (27). The front end rolling bearing (24) and the rear end rolling bearing (25) are separately installed at the two ends inside the insulating protective sleeve (26), and the front end rolling bearing (24) and the rear end rolling bearing (25) are both sleeved outside the connecting rod (22). The insulating protective sleeve (26) is connected to the connecting fixing seat (27), and the connecting fixing seat (27) is used for connecting with the driving mechanism (3).

5. The device according to claim 4, characterized in that, The dust suction mechanism (4) comprises a generator mounting seat (41), a vacuum generator (42), a ventilation pipeline (43), and a pipeline fastener (44). The generator mounting seat (41) is connected to the connecting fixing seat (27), the vacuum generator (42) is connected to the generator mounting seat (41), the ventilation pipeline (43) is connected to the vacuum generator (42), and the pipeline fastener (44) is connected to the insulating protective sleeve (26) and is used for fixing the position of the ventilation pipeline (43).

6. The device for cleaning the static contact insulation under the voltage of the bus-tie compartment of the medium voltage distribution panel in the nuclear power plant according to claim 5, characterized in that, The ventilation pipeline (43) is provided with a filter screen (45) inside.

7. The device according to claim 4, characterized in that, The driving mechanism (3) comprises a motor fixing seat (31), a driving connecting seat (32), an adjustable speed motor (33), and a motor driving shaft (34). The connecting fixing seat (27) is provided with an internal thread part (271), the driving connecting seat (32) is provided with an external thread part (321) corresponding to the internal thread part (271), and the driving connecting seat (32) is fixedly connected to the motor fixing seat (31). The adjustable speed motor (33) is installed in the motor fixing base (31), and the adjustable speed motor (33) is used for driving the motor driving shaft (34) to rotate, and the motor driving shaft (34) is provided with a driving shaft plug-in part (341) corresponding to the matching plug (23).

8. The device according to claim 7, characterized in that, The motor fixing base (31) is provided with a motor cooling fan (36) and a motor power switch (37).

9. The device according to claim 7, characterized in that, The operation mechanism (5) comprises an operation base (51), a motor speed regulating button (52) and a vacuum generation switch button (53). The operation base (51) is connected to the motor fixing base (31), and the motor speed regulating button (52) and the vacuum generation switch button (53) are connected to the operation base (51).

10. The device for cleaning the static contact insulation under the voltage of the bus-tie compartment of the medium voltage distribution panel in nuclear power plants according to claim 9, characterized in that, The operation mechanism (5) further comprises a power line (54) and a power plug (55). One end of the power line (54) is connected to the operation base (51), and the power plug (55) is connected to the power line (54).

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