Safety interlock device for earthing knife of metal armored removable high voltage switch cabinet

Abstract

The purpose of the present invention is to provide a safety interlock device for the grounding knife of a metal-clad removable high-voltage switch cabinet. When the rear door of the cabinet needs to be opened when it is closed, the rotating shaft is rotated inward, and the rotating shaft drives the tilted connecting arm to rotate downward, thereby driving the connecting frame and the screw rod to move downward, thereby driving the grounding knife to move downward and ground to ensure personal safety and form a safety interlock. While rotating the rotating shaft, the blocking arm moves downward and contacts the front end head of the upper front-and-rear moving column to push it backward, and the upper front-and-rear moving column pushes the lower front-and-rear moving column backward through the movable arm, and the lower front-and-rear moving column is pushed backward to push the rear door open, which can well ensure the safety of people and is easy to operate.

Description

Technical Field

[0001] The invention relates to the field of metal armored removable high-voltage switch cabinet, in particular to a safety interlocking device for a grounding knife of a metal armored removable high-voltage switch cabinet. Background Art

[0002] When the metal armored removable high-voltage switchgear is working normally, the grounding knife is not grounded, but in some cases, the rear door needs to be opened for inspection and maintenance. When the rear door is opened, the grounding knife must be grounded to ensure human life safety. Therefore, a safety interlock device is required, and the grounding knife needs to be grounded when the rear door is opened. Therefore, it is very necessary to solve this problem. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a safety interlock device for the grounding knife of a metal armored removable high-voltage switch cabinet. When the rear door of the cabinet needs to be opened when it is closed, the rotating shaft is rotated inward, and the rotating shaft drives the tilted connecting arm to rotate downward, thereby driving the connecting frame and the screw to move downward, thereby driving the grounding knife to move downward and ground to ensure personal safety and form a safety interlock. While rotating the rotating shaft, the blocking arm moves downward and contacts the front end head of the upper front-rear moving column to push it backward, and the upper front-rear moving column pushes the lower front-rear moving column backward through the movable arm, and the lower front-rear moving column is pushed backward to push the rear door open, which can well ensure the safety of people and is easy to operate, solving the problems encountered in the background technology.

[0004] The purpose of the present invention is to provide a safety interlock device for the grounding knife of a metal-clad removable high-voltage switch cabinet, comprising a cabinet body, wherein a horizontal rotating shaft in the front-to-back direction is arranged at the rear end of the inner side surface of the cabinet body through a rotating bearing, the front end of the rotating shaft extends at the front door of the cabinet body, and the middle of the rotating shaft passes through a limiting plate with a through hole to limit the horizontal position of the rotating shaft; a collar is arranged at the rear part of the rotating shaft, and a connecting arm is arranged on the collar; the connecting arm is connected to a screw rod downward through a movably connected connecting frame, and a grounding knife is connected to the bottom of the screw rod, and when the rear door of the cabinet body is closed, the connecting arm is in a tilted state, and the grounding knife is in an upwardly lifted state and is not grounded; the rotating shaft is rotated inward to move the connecting arm downward, thereby driving the grounding knife to be grounded.

[0005] The further improvement lies in that: the limit plate is provided with a through hole passing through front and back below the rotating shaft, and the through hole is arranged near one side of the rear door, and a side plate is arranged in the side plate, and a horizontal movable upper front and rear moving column is passed through the front and rear of the side plate, and the front end of the upper front and rear moving column can extend forward into the through hole, and a movable arm is movably connected to the upper front and rear moving column through a stud, and a movable arm is movably connected to a horizontal movable lower front and rear moving column at the bottom of the movable arm, and the right end of the lower front and rear moving column is movably connected to the movable arm, and the middle of the lower front and rear moving column passes through a limiting frame arranged on the rear end of the side surface of the cabinet, and the rear end of the lower front and rear moving column contacts the rear door; a blocking arm is arranged on the rotating shaft above the front side of the through hole of the limit plate; when the rear door of the cabinet is closed, the front end head of the upper front and rear moving column extends to the front side of the through hole, and the blocking arm is located above the front side of the front end head of the upper front and rear moving column, and when the rotating shaft is rotated inwardly, the blocking arm moves down and contacts with the front end head of the upper front and rear moving column, pushing it backward, and the upper front and rear moving column pushes the lower front and rear moving column backward through the movable arm, thereby pushing the rear door open.

[0006] A further improvement is that the movable arm is movably arranged on a mounting frame located on the rear end of the inner side surface of the cabinet.

[0007] The beneficial effects of the present invention are as follows: when the rear door of the cabinet of the present invention needs to be opened when it is closed, the rotating shaft is rotated inward, and the rotating shaft drives the tilted connecting arm to rotate downward, thereby driving the connecting frame and the screw rod to move downward, thereby driving the grounding knife to move downward and ground to ensure personal safety and form a safety interlock; while the rotating shaft is rotated, the blocking arm moves downward and contacts the front end head of the upper front-and-rear moving column to push it backward, and the upper front-and-rear moving column pushes the lower front-and-rear moving column backward through the movable arm, and the lower front-and-rear moving column is pushed backward to push the rear door open, which can well ensure the safety of people and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the inner side of the cabinet of the present invention (the left side is the direction of the cabinet rear door, and the right side is the direction of the cabinet front door).

[0009] Among them: 1-cabinet, 2-rotating bearing, 3-rotating shaft, 4-limiting plate, 5-collar, 6-connecting arm, 7-connecting frame, 8-screw, 9-through hole, 10-side plate, 11-upper front and rear moving column, 12-movable arm, 13-lower front and rear moving column, 14-limiting frame, 15-blocking arm, 16-mounting frame, 17-rear door. DETAILED DESCRIPTION

[0010] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0011] like Figure 1As shown, the present embodiment provides a safety interlock device for the grounding knife of a metal armored removable high-voltage switch cabinet, comprising a cabinet 1, wherein a horizontal rotating shaft 3 in the front-to-back direction is arranged at the rear end of the inner side surface of the cabinet 1 through a rotating bearing 2, the front end of the rotating shaft 3 extends at the front door of the cabinet 1, and a limiting plate 4 with a through hole passes through the middle of the rotating shaft 3 to limit the horizontal position of the rotating shaft 3; a collar 5 is arranged at the rear of the rotating shaft 3, and a connecting arm 6 is arranged on the collar 5; the connecting arm 6 is connected to a screw rod 8 downward through a movably connected connecting frame 7, and a grounding knife is connected to the bottom of the screw 8. When the rear door of the cabinet 1 is closed, the connecting arm 6 is in a tilted state, and the grounding knife is in an upwardly lifted state and is not grounded; the rotating shaft 3 is rotated internally to move the connecting arm 6 downward, thereby driving the grounding knife to be grounded. The limit plate 4 is provided with a through hole 9 extending front to back below the rotating shaft 3, a side plate 10 is provided near the side of the through hole 9 near the rear door, a horizontal movable upper front to back moving column 11 is provided through the side plate 10, the front end of the upper front to back moving column 11 can extend forward into the through hole 9, a movable arm 12 is movably connected to the upper front to back moving column 11 through a stud, a horizontal movable lower front to back moving column 13 is movably connected to the bottom of the movable arm 12, the right end of the lower front to back moving column 13 is movably connected to the movable arm 12, the middle part of the lower front to back moving column 13 passes through a stud arranged on the inner side of the cabinet 1 The limit frame 14 on the rear end, the rear end of the lower front-to-back moving column 13 contacts the rear door; the stop arm 15 is arranged on the upper front side of the through hole 9 of the limit plate 4 on the rotating shaft 3; when the rear door of the cabinet 1 is closed, the front end head of the upper front-to-back moving column 11 extends in front of the through hole 5, and the stop arm 15 is located above the front side of the front end head of the upper front-to-back moving column 11. When the rotating shaft 3 is rotated inward, the stop arm 15 moves down and contacts the front end head of the upper front-to-back moving column 11, pushing it backward, and the upper front-to-back moving column 11 pushes the lower front-to-back moving column 13 backward through the movable arm 12, thereby pushing the rear door open. The movable arm 12 is movably arranged on the mounting frame 16 located on the rear end of the inner side of the cabinet 1.

[0012] When the rear door 17 of the cabinet needs to be opened when it is closed, the rotating shaft 3 is rotated inward, and the rotating shaft 3 drives the tilted connecting arm 6 to rotate downward, thereby driving the connecting frame 7 and the screw 8 to move downward, thereby driving the grounding knife to move down and ground to ensure personal safety and form a safety interlock. While rotating the rotating shaft 3, the blocking arm 15 moves downward and contacts the front end head of the upper front-rear moving column 11, pushing it backward, and the upper front-rear moving column 11 pushes the lower front-rear moving column 13 backward through the movable arm 12, and the lower front-rear moving column 13 is pushed backward to push the rear door 17 open, which can well ensure the safety of people and facilitate operation.

Claims

1. A safety interlocking device for a grounding knife of a metal-clad removable high-voltage switch cabinet, comprising a cabinet body (1), characterized in that: A horizontal rotating shaft (3) in the front-to-back direction is arranged at the rear end of the inner side surface of the cabinet (1) through a rotating bearing (2), the front end of the rotating shaft (3) extends at the front door of the cabinet (1), and the middle of the rotating shaft (3) passes through a limiting plate (4) with a through hole to limit the horizontal position of the rotating shaft (3); a collar (5) is arranged at the rear of the rotating shaft (3), and a connecting arm (6) is arranged on the collar (5); the connecting arm (6) is connected to a screw rod (8) downward through a movably connected connecting frame (7), and a grounding knife is connected to the bottom of the screw rod (8); when the rear door of the cabinet (1) is closed, the connecting arm (6) is in a tilted state, and the grounding knife is in an upwardly lifted state and is not grounded; the rotating shaft (3) is rotated inward to move the connecting arm (6) downward, thereby driving the grounding knife to be grounded; The limit plate (4) is provided with a through hole (9) extending forward and backward below the rotating shaft (3); a side plate (10) is provided on the side of the through hole (9) close to the rear door; a horizontal movable upper front-to-back moving column (11) is provided in the side plate (10) and passes through the side plate (10); a front end of the upper front-to-back moving column (11) can extend forward into the through hole (9); a movable arm (12) is movably connected to the upper front-to-back moving column (11) through a stud; a horizontal movable lower front-to-back moving column (13) is movably connected to the bottom of the movable arm (12); a right end of the lower front-to-back moving column (13) is movably connected to the movable arm (12); a middle part of the lower front-to-back moving column (13) passes through a movable arm (12) provided inside the cabinet (1). The limit frame (14) is on the rear end of the face, and the rear end of the lower front-to-back moving column (13) contacts the rear door; a stop arm (15) is arranged on the rotating shaft (3) above the front side of the through hole (9) of the limit plate (4); when the rear door of the cabinet (1) is closed, the front end head of the upper front-to-back moving column (11) extends in front of the through hole, and the stop arm (15) is located above the front side of the front end head of the upper front-to-back moving column (11). When the rotating shaft (3) is rotated inward, the stop arm (15) moves downward and contacts the front end head of the upper front-to-back moving column (11), pushing it backward, and the upper front-to-back moving column (11) pushes the lower front-to-back moving column (13) backward through the movable arm (12), thereby pushing the rear door open.

2. The safety interlocking device for the grounding knife of the metal-clad removable high-voltage switch cabinet as claimed in claim 1 is characterized in that: The movable arm (12) is movably mounted on a mounting frame (16) located on the rear end of the inner side surface of the cabinet (1).

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