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CN-224204649-U - Drawer safety locking mechanism of nuclear power switch cabinet

CN224204649UCN 224204649 UCN224204649 UCN 224204649UCN-224204649-U

Abstract

The utility model discloses a drawer safety locking mechanism of a nuclear power switch cabinet, and belongs to the field of switch cabinets. The drawer comprises a drawer body and a locking assembly, wherein the locking assembly comprises a rotating shaft, a first bevel gear and a second bevel gear are arranged on the rotating shaft, a first support plate is arranged on the side face of the drawer shell, the second bevel gear is arranged on the bearing on the first support plate, the second bevel gear is meshed with the first bevel gear, the first bevel gear is connected with the first bevel gear in a transmission mode, a buckling part is arranged on the first bevel gear, the auxiliary unit comprises a second support plate, the third bevel gear is arranged on the bearing on the second support plate, the second bevel gear is connected with the second bevel gear in a transmission mode, the second bevel gear is provided with the buckling part, a buckling groove is formed in the side face of the drawer body, and a telescopic rod piece is connected between the second bevel gear and the first bevel gear. According to the drawer safety locking mechanism of the nuclear power switch cabinet, the first lead screw and the second lead screw are driven by the bevel gears, and the buckling parts are matched with the buckling grooves to be matched, so that bidirectional rigid constraint on the drawer body is realized, and the risk of misoperation under dangerous working conditions is avoided.

Inventors

  • GUO WENXIANG
  • ZHU WEI

Assignees

  • 大航有能电气有限公司

Dates

Publication Date
20260505
Application Date
20250528

Claims (7)

  1. 1. The drawer safety locking mechanism of the nuclear power switch cabinet comprises a drawer shell (1), a drawer body (12) and a locking assembly (2), and is characterized in that the locking assembly (2) comprises a rotating shaft (21) which is installed on the side surface of the drawer shell (1) through a bearing, a bevel gear I (22) is installed at one end of the rotating shaft (21), a first support plate (23) is installed on the side surface of the drawer shell (1), a bevel gear II (25) is installed on the first support plate (23) through a bearing, the bevel gear II (25) is meshed with the bevel gear I (22), a screw rod I (26) is connected to the center of the bevel gear II (25) in a transmission mode, and a buckling part I (27) is installed at one end of the screw rod I (26); An auxiliary unit is mounted on the drawer housing (1), the auxiliary unit comprises a second support plate (29) mounted on the side surface of the drawer housing (1), a third bevel gear (210) is mounted on a bearing on the second support plate (29), a second screw rod (211) is connected with the center of the third bevel gear (210) in a transmission manner, and a second buckling part (212) is mounted at one end of the second screw rod (211); The side of the drawer body (12) is provided with a buckling groove (122) matched with the buckling part, a telescopic rod piece (28) is connected between the screw rod II (211) and the screw rod I (26), and a driving piece (213) which is suitable for driving the rotating shaft (21) to rotate is arranged on the drawer shell (1).
  2. 2. The drawer safety locking mechanism of the nuclear power switch cabinet according to claim 1, wherein axial constraint exists between the first screw rod (26) and the drawer housing (1), a bearing piece is arranged on the side face of the drawer housing (1), and the bearing piece is movably sleeved on the first screw rod (26).
  3. 3. The drawer safety locking mechanism of the nuclear power switch cabinet of claim 1, wherein axial constraint exists between the second screw rod (211) and the drawer housing (1), and a bearing piece is arranged on the side surface of the drawer housing (1) and is movably sleeved on the second screw rod (211).
  4. 4. The drawer safety locking mechanism of a nuclear power switch cabinet according to claim 1, wherein the telescopic rod (28) is composed of a first rod (281) and a second rod (282) which are telescopically sleeved with each other, movable grooves (121) which are matched with the diameters of the rods are formed in the side surfaces of the drawer housing (1) and the drawer body (12), the movable grooves (121) allow the telescopic rod (28) to freely move in the drawer drawing process, sliding grooves (283) are formed in the telescopic rod (28), limiting parts (284) are arranged on the second rod (282), and the second rod (282) slides in the sliding grooves (283) through the limiting parts (284).
  5. 5. The drawer safety locking mechanism of a nuclear power switch cabinet according to claim 4, wherein the diameter of the telescopic rod piece (28) is smaller than that of the buckling part, and the buckling groove (122) is communicated with the movable groove (121).
  6. 6. The drawer safety locking mechanism of a nuclear power switch cabinet according to claim 2, wherein the second buckling part (212) and the first buckling part (27) are of hemispherical structures, and the buckling groove (122) is a hemispherical inner groove.
  7. 7. The drawer safety locking mechanism of a nuclear power switch cabinet according to claim 1, wherein anti-slip protruding points are arranged at contact positions of the second buckling part (212) and the first buckling part (27) with the buckling groove (122), and the anti-slip protruding points are made of silica gel.

Description

Drawer safety locking mechanism of nuclear power switch cabinet Technical Field The utility model relates to the technical field of switch cabinets, in particular to a drawer safety locking mechanism of a nuclear power switch cabinet. Background In a complex and high-risk operation environment of a nuclear power plant, a switch cabinet is used as a core hub for power distribution and control, and the safety and reliability of the switch cabinet directly relate to the stable operation of the nuclear power plant and the personnel life and property safety. The drawer type switch cabinet has the advantages of modularized design, convenience in maintenance and the like, and is widely applied to a power system of a nuclear power station. The efficient heat dissipation of the internal elements is realized through the heat dissipation through holes on the outer shell of the cabinet body, the cabinet body is divided into a plurality of independent power distribution cells by utilizing the bearing partition boards, the drawer units in the cells can be flexibly provided with electric elements such as a circuit breaker, a relay and the like, and operation and maintenance personnel can draw out the drawer units by unlocking the drawer locking device according to a standard flow. The drawn drawer units can be detected and maintained in all directions on a special overhaul station. However, in the actual operation process, when the equipment is in dangerous working conditions such as power-on operation, the grounding switch is not closed, and the like, if the drawer is pulled out by misoperation, serious accidents such as electric shock, short circuit and the like are extremely easy to occur, even the power system is paralyzed, and although the traditional interlocking device can lock the drawer based on the electric or mechanical logic such as the opening and closing state of the circuit breaker, the position of the grounding switch and the like, the traditional interlocking device is influenced by environmental factors (such as mechanical abrasion and aging of electric elements) and has failure risks. Therefore, there is a need to design a drawer safety locking mechanism for a nuclear power switchgear. It should be noted that the above information disclosed in this background section is only for understanding the background of the inventive concept and, therefore, it may contain information that does not constitute prior art. Disclosure of utility model The embodiment of the utility model provides a drawer safety locking mechanism of a nuclear power switch cabinet, which aims to solve the problem that in actual operation, a drawer is easy to cause serious accidents when the drawer is pulled by mistake under the working condition of electrifying operation of the drawer switch cabinet, and the existing interlocking device is influenced by environment and has failure risk. The embodiment of the utility model adopts the following technical scheme that the drawer safety locking mechanism of the nuclear power switch cabinet is adopted. The novel drawer comprises a drawer shell, a drawer body and a locking assembly, wherein the locking assembly comprises a rotating shaft, a bearing is arranged on the side face of the drawer shell, a bevel gear I is arranged at one end of the rotating shaft, a first support plate is arranged on the side face of the drawer shell, a bevel gear II is arranged on the bearing on the first support plate, the bevel gear II is meshed with the bevel gear I, a first screw rod is connected with the center of the bevel gear II in a transmission mode, a buckling part I is arranged at one end of the first screw rod, an auxiliary unit is arranged on the drawer shell and comprises a second support plate arranged on the side face of the drawer shell, a bevel gear III is arranged on the bearing on the second support plate, a screw rod II is connected with the center transmission of the bevel gear III, a buckling part II is arranged at one end of the screw rod II, a buckling groove matched with the buckling part I is formed in the side face of the drawer body, a telescopic rod piece is connected between the screw rod II and the screw rod I, and a driving piece suitable for driving the rotating shaft is arranged on the drawer shell. Further, axial constraint exists between the first screw rod and the drawer shell, and a bearing piece is arranged on the side face of the drawer shell and movably sleeved on the first screw rod. Further, axial constraint exists between the second screw rod and the drawer shell, and a bearing piece is arranged on the side face of the drawer shell and is movably sleeved on the second screw rod. Further, the telescopic rod comprises a first rod and a second rod which are mutually telescopic and sleeved, a movable groove which is matched with the diameter of the rod is formed in the side face of the drawer shell and the side face of the drawer body, the movable groove allows the telescopi