Manual switch of distributing board fault block with safety means

Abstract

The present invention allows a manual lever to be inserted into a coupling holder configured in a first direction changer to turn a fault section switch of a power distribution panel ON or OFF, and when rotated to turn the fault section switch ON, the operator can visually identify the number of rotations; at the same time, when the manual lever is rotated in the forward direction to turn OFF, operation is performed, but rotation is controlled during reverse rotation to prevent the cable from bursting. As a means to solve the above problem, the present invention configures a manual switching device for a fault section switch installed in a power distribution board, wherein a manual lever is inserted into a first directional switch configured with a gearbox and the manual lever is rotated to transmit rotational power to a second directional switch, wherein a rotational counter is installed on one side of the gearbox of the first directional switch and the shaft of the first directional switch and the shaft of the rotational counter are connected through a coupling so that the rotational count of the first directional switch can be transmitted to and verified by the rotational counter, and a ratchet wheel is configured on one side of the coupling so that reverse rotation of the manual lever is prevented by a ratchet configured on one side of the gearbox.

Description

Technology Field

[0001] The present invention relates to a manual switching device for a fault section switch of a power distribution board equipped with safety means. In particular, to operate the switching of a fault section switch installed within a power distribution board, a counter is installed to verify the number of rotations of the manual lever when the manual lever is rotated after being inserted into a first direction changer. Simultaneously, a means to prevent reverse rotation of the manual lever is provided to prevent wire breakage and thereby prevent electric shock accidents. Background Technology

[0002] Generally, a power distribution panel is a device that operates, controls, and monitors electrical facilities to ensure their safe use by converting extra-high voltage electricity supplied by KEPCO to commercial buildings, residential complexes, and various industrial facilities requiring power into low voltage and rated capacity suitable for the actual ratings of the equipment and facilities in use. The said power distribution panel is equipped with a manual switching device to operate the fault section switch manually.

[0003] To briefly explain the manual switching device of the fault section switch mentioned above, a cable conduit with a cable attached is connected between a bevel gear configured on one side of the fault section switch and a manual lever coupling holder configured on the switchboard door. Then, when one wishes to manually turn the high-voltage switch on or off, the insertion part of the manual lever is inserted into the coupling holder configured on the switchboard door. In this state, when the manual lever is rotated clockwise, the cable inserted inside the cable conduit rotates, thereby rotating the bevel gear configured on one side of the fault section switch and turning the fault section switch on or off.

[0004] However, when an operator inserts a manual lever into the insertion part of a coupling holder configured in a switchboard to turn the fault section switch on or off and rotates the lever, the number of rotations is measured by feel. Consequently, the number of rotations occasionally deviates from the accurate count, resulting in cases where the fault section switch fails to turn on.

[0005] In addition, to turn off the fault section switch, the manual lever must be rotated in the same clockwise direction as when turning it on; however, there are instances where it is habitually rotated in the opposite direction. If this operation is repeated, there is a problem in that the cable may snap and come into contact with the high-voltage busbar, resulting in an electric shock accident.

[0006] Upon reviewing prior art for operating a fault section switch of a power distribution board, Patent No. 10-1004313 "Manual switching device for a fault section switch of a power distribution board" (Patent Document 1) has been provided.

[0007] The aforementioned Patent Document 1 is a patent previously registered by the applicant of the present invention. Upon reviewing the technical content, the present invention stipulates that a cable conduit is assembled to a driving bevel gear of a fault section switch installed within a power distribution panel and then drawn out in a straight line toward the opening / closing door; a second direction changer is fixedly installed, configured to have a bevel gear embedded in the end of the cable conduit to change the rotational power by 90°; the second direction changer is connected to a first direction changer via a connecting rod; and a coupling holder is assembled on the front of the first direction changer and fixedly installed on a fixing bar located inside the opening / closing door. Thus, when manually operating the fault section switch, a manual lever is inserted into the coupling holder and rotated, thereby rotating the rotational power from the first direction changer by 90° to rotate the connecting rod; the rotation of the connecting rod is then changed by 90° through the second direction changer, and the bevel gear of the fault section switch is rotated through the cable conduit, thereby enabling the fault section switch to open or close. It was done.

[0008] In the case of the above-mentioned patent document 1, the cable conduit for manual opening and closing of a fault section switch installed in a switchboard is configured to be installed in a straight line without bending, thereby preventing contact with the high-voltage busbar and simultaneously preventing wear of the cable conduit to prevent safety accidents, as well as preventing frequent replacement due to damage to the cable conduit and improving convenience of use by allowing the user to install the coupling position of the manual lever for manual opening and closing operation at a desired location.

[0009] However, in the case of Patent Document 1, since the operator counts and checks the number of rotations when rotating the manual lever, errors sometimes occur where the number of rotations deviates from the accurate number, and there was a problem that when turning the fault section switch on and then off, the manual lever is rotated in reverse, causing the cable to twist and burst, resulting in a risk of electric shock accident. Prior art literature

[0010] Patent No. 10-1004313 "Manual switching device for fault section switch in power distribution panel" The problem to be solved

[0011] The present invention allows a manual lever to be inserted into a coupling holder configured in a first direction changer to turn a fault section switch of a power distribution panel ON or OFF, and when rotated to turn the fault section switch ON, the operator can visually identify the number of rotations; at the same time, when the manual lever is rotated in the forward direction to turn OFF, operation is performed, but rotation is controlled during reverse rotation to prevent the cable from bursting. means of solving the problem

[0012] As a means to solve the above problem, the present invention configures a manual switching device for a fault section switch installed in a power distribution board, wherein a manual lever is inserted into a first directional switch configured with a gearbox and the manual lever is rotated to transmit rotational power to a second directional switch, wherein a rotational counter is installed on one side of the gearbox of the first directional switch and the shaft of the first directional switch and the shaft of the rotational counter are connected through a coupling so that the rotational count of the first directional switch can be transmitted to and verified by the rotational counter, and a ratchet wheel is configured on one side of the coupling so that reverse rotation of the manual lever is prevented by a ratchet configured on one side of the gearbox. Effects of the invention

[0013] The present invention relates to a manual switching device for a fault section switch installed in a power distribution panel, wherein a manual lever is inserted into a first directional switch configured with a gearbox, and the manual lever is rotated to transmit rotational power to a second directional switch; wherein a rotational counter is installed on one side of the gearbox of the first directional switch, and the shaft of the first directional switch and the shaft of the rotational counter are connected through a coupling so that the rotational count of the first directional switch can be transmitted to and verified by the rotational counter; wherein a ratchet wheel is configured on one side of the coupling so that reverse rotation of the manual lever is prevented by a ratchet configured on one side of the gearbox, thereby enabling an operator to visually identify the number of rotations when the manual lever is inserted into a coupling holder configured in the first directional switch to turn the fault section switch on or off, and simultaneously, when the manual lever is rotated in the forward direction to turn it off It operates, and during reverse rotation, it controls the rotation to prevent the cable from bursting, among other effects. Brief explanation of the drawing

[0014] Fig. 1: Schematic diagram of a switchboard to which the device of the present invention is applied Fig. 2: Enlarged view of the lumbar region of Fig. 1 FIG. 3: Perspective view of a first direction changer equipped with the device of the present invention. Fig. 4: Deconstructed view of the key part of Fig. 3 Fig. 5: Schematic diagram of the bevel gear meshing scheme of a first direction changer to which the device of the present invention is applied. FIG. 6: A diagram showing a state in which only a reverse rotation prevention device is installed as another embodiment of the present invention. FIG. 7: A diagram showing a state in which only a rotation counter is installed as another embodiment of the present invention. Specific details for implementing the invention

[0015] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0016] FIG. 1 is a schematic diagram of a switchboard (10) to which the device of the present invention is applied, and FIG. 3 and FIG. 4 are diagrams of the main parts of the device of the present invention.

[0017] In the present invention, when turning on or off a fault section switch (11) installed in a switchboard (10), a manual lever (12) is inserted into a first direction switch (20), and then the manual lever (12) is rotated clockwise. The rotational power is transmitted to a second direction switch (30) through a connecting rod (13) connected to a universal joint (17), and the fault section switch (11) is turned on or off through the rotational power via a manual cable (14) and a rotational power transmission device (15). This is no different from the technical content of Patent Document 1 previously registered by the inventor.

[0018] In the present invention, as shown in FIGS. 3 and 4, a reverse rotation prevention device (60) and a counter device (70) are installed on one side of the gearbox (21) constituting the first direction changer (20), thereby preventing reverse rotation of the manual lever (12) and allowing the number of rotations to be checked visually.

[0019] The first direction changer (20) used in the device of the present invention is composed of a driving bevel gear (22) and a driven bevel gear (23), the shaft (24) of the driving bevel gear is connected to the square shaft (27) of the coupling holder (26), the right shaft (28) of the driven bevel gear (23) is connected to a connecting rod (13) that is connected to the second direction changer (30), and a reverse rotation prevention device (60) and a counter device (70) are connected to the left shaft (25).

[0020] The reverse rotation prevention device (60) and the counter device (70), which are connected to the left shaft (25) of the first direction changer (20), are configured as follows.

[0021] That is, a bracket (50) having a fixing plate (51) formed on the bottom of a gearbox (21) constituting a first direction changer (20) is fixedly installed, and a coupling (40) having a screw hole (41) formed on a left shaft (25) protruding from one side of the gearbox (21) is fitted, and then a fixing bolt (42) is screwed into the screw hole (41) so that the coupling (40) is fixedly installed on the left shaft (25) of the first direction changer (20).

[0022] A ratchet wheel (43) is configured on one side of the coupling (40), and a ratchet (44) elastically installed on one side flange (29) of the first direction changer (20) is engaged with the ratchet wheel (43), thereby forming a reverse rotation prevention device (60) that causes the coupling (40), i.e., the ratchet wheel (43), to rotate only in a clockwise direction.

[0023] In configuring the reverse rotation prevention device (60) of the present invention, as shown in FIG. 6, a separate ratchet wheel (43) may be fixedly installed on the left shaft (25), and the ratchet wheel (43) may be operated with a ratchet (44) installed on one side of the flange (29) to prevent reverse rotation of the manual lever (12). In the above case, the reverse rotation prevention device (60) can be applied when only the reverse rotation prevention device (60) is needed without a counter device (70).

[0024] A shaft rod (72) configured on one side of a rotation counter (71) is inserted into a shaft hole (45) configured on one side of a coupling (40), and a fixing bolt (42) is screwed into a screw hole (41). A display plate (73) that displays the number of rotations is configured on the front of the rotation counter (71), and the rotation counter (71) is fixedly installed on a fixing plate (51) of a fixing bracket (50), thereby forming a count device (70) in which the number of rotations of the coupling (40) is displayed as a number on the display plate (73).

[0025] In carrying out the present invention, as shown in FIG. 7, if necessary, only the counter device (70) may be configured and used without the reverse rotation prevention device (60).

[0026] The present invention, configured as described above, is no different from the conventional method in that when a manual lever (12) is inserted into a coupling holder (26) configured in a switchboard (10) and rotated clockwise, the driving bevel gear (22) and the driven bevel gear (23) rotate, and rotational power is transmitted to the second direction changer (30) through the connecting shaft (13), and thus the rotational power transmitted through the manual cable (14) turns the fault section switch (11) ON or OFF through the rotational power transmission device (15).

[0027] However, in the manual opening / closing device of the fault section switch to be provided in the present invention, when a worker inserts the manual lever (12) into the coupling holder (26) and then rotates the manual lever (12) in a clockwise direction, the driving bevel gear (22) and the driven bevel gear (23) rotate, and thus the left shaft (25) installed on the driven bevel gear (23) rotates.

[0028] When the left shaft (25) rotates, the shaft (72) configured in the rotation counter (71) rotates through the coupling (40) connected to the left shaft (25), and the number of rotations of the manual lever (12) is displayed on the display plate (73), so the operator can accurately check the number of rotations of the manual lever (12).

[0029] Therefore, when turning on the fault section switch (11) installed in the switchboard (10), the set number of rotations can be accurately rotated without error.

[0030] As described above, to turn the fault section switch (11) ON and then OFF, it can be turned clockwise just as it was ON.

[0031] At this time, if the operator occasionally makes a mistake in the rotation direction of the manual lever (12) and rotates it in the reverse direction, that is, counter-clockwise, the ratchet (29) is engaged with the ratchet wheel (43) configured on one side of the coupling (40), so reverse rotation is prevented, thereby preventing the bursting of the manual cable (14) caused by reverse rotation and thus preventing safety accidents.

[0032] As explained above, the manual opening / closing device of the fault section switch of the present invention has a counter device (70) formed by a reverse rotation prevention device (60) on one side of the first direction changer (20) so that the number of rotations of the manual lever (12) can be accurately determined, and at the same time, reverse rotation of the manual lever (12) is prevented, thereby preventing safety accidents. Explanation of the symbols

[0033] (10)--Switchboard (11)--Fault section switch (12)--Manual lever (13)--Connecting rod (14)--Manual cable (15)--Rotational power transmission device (17)--Universal Joint (20)--First Direction Switch (21)--Gearbox (22)--Drive bevel gear (23)--Driven bevel gear (24)--Square shaft rod (25)--Left shaft (26)--Combination holder (28)--Right shaft (29)--Flange (30)--Second direction changer (40)--Coupling (41)--screw hole (42)--fixing bolt (43)--Ratchet wheel (44)--Ratchet (45)--Axle hole (50)--Fixing bracket (51)--Fixed plate (60)--Reverse rotation prevention device (70)--Counter device (71)--Rotation counter (72)--Spirit Seal (73)--Indicator

Claims

Claim 1 delete Claim 2 delete Claim 3 In configuring a manual switching device for a fault section switch of a power distribution board (10) such that when turning on or off a fault section switch (11) installed within the power distribution board (10), a manual lever (12) is inserted into a first direction switch (20), and when the manual lever (12) is rotated clockwise, rotational power is transmitted to a second direction switch (30) through a connecting rod (13), and the fault section switch (11) is turned on or off using the rotational power through a manual cable (14) and a rotational power transmission device (15), a reverse rotation prevention device (60) and a counter device (70) are configured on one side of the first direction switch (20), wherein the reverse rotation prevention device (60) has a coupling (40) fixedly installed on the left shaft (25) of a gearbox (21), and a ratchet wheel (43) is installed on one side of the coupling (40). A manual switching device for a fault section switch of a power distribution board equipped with safety means, characterized in that the above ratchet wheel (43) is configured to operate with a ratchet (44) installed on one side of a flange (29) to form a reverse rotation prevention device (60), and the counter device (70) is configured such that the shaft (72) of a rotation count counter (71) is connected to a coupling (40) fixedly installed on the left shaft (25) of a gearbox (21), thereby allowing the rotation count of the manual lever (12) to be displayed on the display plate (73) of the rotation count counter (71).

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