Lifting equipment for assembling housings of a high voltage switchgear

Abstract

The present invention discloses a lift device for assembling a housing of a high-voltage switchgear. The present invention is configured to lift a heavy switchgear housing, thereby enabling easy and safe installation or removal of the switchgear housing in an installation hole formed in multiple stages on a fixed frame within the main body of the power system, as well as allowing installation or removal to be performed by a single worker rather than multiple workers, thereby reducing labor costs and preventing safety accidents caused by the unexpected falling of the heavy switchgear housing.

Description

Technology Field

[0001] The present invention relates to a technology for assembling a high-voltage switch housing for a power system, and more specifically, to a lift device for assembling a housing for a high-voltage switch that enables easy installation or removal of a switch housing (or epoxy housing) having a predetermined load from a switch fixing frame within a main body. Background Technology

[0002] Electricity generated at a power plant at a voltage of approximately 20,000V is stepped up to an ultra-high voltage suitable for transmission and sent to a primary substation. At the primary substation, the supplied power is reduced to 229kV and supplied to secondary substations or individual consumers. The power supplied from the primary substation is delivered to the receiving facilities of each consumer through a distribution system consisting of overhead and underground distribution lines, and is further supplied to low-voltage consumers through extra-high voltage consumers, high-voltage consumers, and various outdoor-installed transformers. At this time, solid-insulated switches may be used for the purposes of line separation, branching, and protection of the primary side of transformers in the high-voltage consumer's distribution panel (receiving facility).

[0003] In other words, the above-mentioned switch is a device used in cities and residential complexes to distribute power. It is used to isolate faulty sections by rapidly switching the switch for safety after the circuit breaker operates in the event of a surge or accident in the power system, and to shorten the power outage time by supplying power to the power outage section from other healthy systems. The above-mentioned switch is installed in multiple stages on a fixed frame formed in the main body, along with an operating mechanism and a control box, and accordingly, multiple installation holes can be formed on the upper part of the fixed frame.

[0004] However, there was an inconvenience in that the work of installing or removing the switch housing made of epoxy in the installation hole formed at the top of the above fixed frame had to be done manually by the worker.

[0005] That is, when the above switch housing is installed on the above fixed frame as a heavy body, the first worker must first lift the switch housing from the lower side to the upper side and insert it into the installation hole, and then the second worker can proceed with the work of fixing the switch housing to the installation hole using fastening means such as bolts.

[0006] On the other hand, when separating the switch housing from the installation hole of the fixed frame, the first worker must first perform the task of releasing the fastening state of the fastening means, such as bolts, while the second worker is holding the switch housing to be separated, and subsequently the first worker can proceed with the task of lowering the switch housing, which is a heavy object, from the upper side to the lower side.

[0007] Therefore, when installing or separating the switch housing from the fixed frame as described above, conventionally, two workers were required, and there was inevitably a risk of safety accidents if a worker was careless or made a mistake while lifting or lowering the switch housing. Prior art literature

[0008] Registered Patent Publication No. 10-0860528 (Published Sep. 26, 2008) Registered Patent Publication No. 10-0960075 (Published May 31, 2010) Registered Patent Publication No. 10-1119333 (Published March 6, 2012) Registered Patent Publication No. 10-1633768 (Published June 27, 2016) The problem to be solved

[0009] The problem that the present invention aims to solve is to provide a lift device for assembling a housing of a high-voltage switchgear, which enables the installation or removal of the switchgear housing in a multi-stage installation hole formed in a fixed frame within the main body of the power system to be performed easily and safely by configuring a lift device for raising and lowering the heavy switchgear housing. means of solving the problem

[0010] A lift device for assembling a housing of a high-voltage switchgear, which is a means for solving the problem of the present invention, comprises: a main frame having a first rack gear section formed thereon that is movable via casters to be in close contact with one surface of a fixed frame having a multi-stage mounting hole; a first moving member coupled to the main frame to move linearly in the left-right direction along the first rack gear section; a first operating member formed on the first moving member and connected to the first rack gear section to move the first moving member linearly in the left-right direction; a lifting drive unit fixedly disposed on the first moving member; a lifting member connected to the lifting drive unit and moving up and down relative to the first moving member according to the driving of the lifting drive unit; and a second moving member coupled to the lifting member and moving linearly in the front-back direction, having a fixing member to which the switchgear housing is fixed and a second rack gear section formed thereon that is movable in the front-back direction. and, a second operating member formed on the first moving member and connected to the second rack gear portion, which moves the second moving member linearly in the forward and backward directions; is included.

[0011] In addition, the main frame is formed with an alignment frame that sets the alignment position of the main frame and is in close contact with one side of the fixed frame, and one or more fixing pieces that contact the fixed frame, and the first rack gear part is formed on one side of a bar-shaped structure formed along the plane of the main frame.

[0012] In addition, the first moving member is composed of a combined structure of an upper plate, a lower plate, and a side plate connecting the upper plate and the lower plate, and a lifting guide hole for lifting the lifting member is formed in the side plate.

[0013] In addition, a plurality of brake levers are formed on the lower plate to restrict linear movement of the first moving member in the left-right direction and linear movement of the second moving member in the front-back direction, respectively.

[0014] Additionally, the first operating member comprises: a first rotating rod formed perpendicularly to the first moving member; a first pinion gear fixed to the lower side of the first rotating rod and rotated by the first rotating rod, which meshes with the first rack gear; and a first handle that rotates the first rotating rod.

[0015] In addition, the lifting drive unit comprises: a lifting motor fixed to the first moving member; and a transfer screw, having both ends fixed vertically to the first moving member and rotating according to the driving of the lifting motor to lift the lifting member.

[0016] In addition, the lifting motor is configured to be driven in a forward or reverse direction according to the operation signal of the operating switch, and a battery is fixed to the first moving member to supply power necessary for driving the lifting motor in a forward or reverse direction according to the operation signal of the operating switch.

[0017] Additionally, the lifting member comprises: a lifting frame that is coupled to the transfer screw and moves up and down according to the rotation of the transfer screw; and a guide frame that is coupled to the lifting frame as a connecting frame and is positioned on one side of the first moving member to guide linear movement in the front-rear direction of the second moving member.

[0018] In addition, the second moving member is a frame structure that moves linearly in the forward and backward directions along the guide frame, the fixing member is formed on the front end side of the frame structure, and the second rack gear part is formed on one side of a bar-shaped structure formed on the upper surface of the frame structure.

[0019] Additionally, the second operating member comprises: a second rotating rod formed perpendicularly to the first moving member; a second pinion gear fixed to the lower side of the second rotating rod and rotated by the second rotating rod, which meshes with the second rack gear; and a second handle that rotates the second rotating rod.

[0020] In addition, the second operating member is configured to be raised together with the lifting member according to the gear meshing of the second pinion gear and the second rack gear part. Effects of the invention

[0021] Thus, the present invention comprises a lift device for raising and lowering a heavy switchgear housing, thereby enabling the installation or removal of the switchgear housing in a multi-stage installation hole formed in a fixed frame within the main body of the power system to be performed easily and safely, and allowing the installation or removal work to be carried out by a single worker rather than multiple workers, thereby reducing labor costs and preventing safety accidents caused by the unexpected falling of the heavy switchgear housing.

[0022] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0023] FIG. 1 is a perspective view showing the separation structure of a lift device for assembling a housing of a high-voltage switch and a fixed frame within a power system body as an embodiment of the present invention. FIG. 2 is a perspective view showing the structure of a lift device for assembling a housing of a high-voltage switchgear as an embodiment of the present invention. FIGS. 3 and FIGS. 4 are partially enlarged perspective views of a lift device for assembling a housing of a high-voltage switchgear as an embodiment of the present invention. FIG. 5 is a front schematic diagram of FIG. 4 as an embodiment of the present invention. FIG. 6 is a schematic plan view showing a state in which a first moving member moves linearly in the left-right direction and a second moving member moves linearly in the front-back direction as an embodiment of the present invention. FIG. 7 is a perspective view showing a state in which a lift device for assembling a housing of a high-voltage switch is in close contact with a fixed frame within a power system body as an embodiment of the present invention. FIG. 8 is a front schematic diagram of a lifting member in which a switch housing is mounted on a fixing member and the lifting member is in a state of being raised and lowered as an embodiment of the present invention. Specific details for implementing the invention

[0024] The detailed description of the invention refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that various embodiments of the invention are different but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein in relation to one embodiment may be implemented in other embodiments without departing from the spirit and scope of the invention. It should also be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the following detailed description is not intended to be limiting, and the scope of the invention is limited only by the appended claims, including all equivalents to those claimed therein, provided appropriately described. Similar reference numerals in the drawings refer to the same or similar functions across various aspects.

[0025] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

[0026] FIG. 1 is a perspective view showing the separation structure of a fixed frame within a power system body and a lift device for assembling a housing of a high-voltage switchgear as an embodiment of the present invention, FIG. 2 is a perspective view showing the structure of a lift device for assembling a housing of a high-voltage switchgear as an embodiment of the present invention, FIG. 3 and FIG. 4 are partially enlarged perspective views of a lift device for assembling a housing of a high-voltage switchgear as an embodiment of the present invention, and FIG. 5 is a front schematic view of FIG. 4 as an embodiment of the present invention.

[0027] FIG. 6 is a plan schematic diagram showing a state in which a first moving member moves linearly in the left-right direction and a second moving member moves linearly in the front-back direction as an embodiment of the present invention, FIG. 7 is a perspective view showing a state in which a lift device for assembling a housing of a high-voltage switch is in close contact with a fixed frame within a power system body as an embodiment of the present invention, and FIG. 8 is a front schematic diagram showing a state in which a lifting member with a switch housing mounted on a fixed member is raised and lowered as an embodiment of the present invention.

[0028] Referring to the attached FIGS. 1 to 8, a lift device for housing assembly of a high-voltage switch according to an embodiment of the present invention includes a main frame (10), a first moving member (20), a first operating member (30), a lifting drive unit (40), a lifting member (50), a second moving member (60), and a second operating member (70).

[0029] The above main frame (10) is a rectangular movable structure that is in close contact with one side of a fixed frame (1) having a multi-stage installation (1a), and a caster (11) is formed on the bottom surface, and a first rack gear part (12) that moves left and right can be formed on one side of the structure that forms a bar shape on the plane.

[0030] In addition, on one side of the main frame (10), an alignment frame (13) for setting the alignment position of the main frame (10) that is in close contact with one side of the fixed frame (1) may be formed, and one or more fixing pieces (14) that contact the fixed frame (1) may be formed.

[0031] That is, the main frame (10) is in close contact with the front of the fixed frame (1), and the close contact state can be maintained by the alignment frame (13) and the fixing piece (14), so as to ensure that the separation or installation work is carried out stably when separating the switch housing (2) from the installation hole (1a) of the fixed frame (1) or installing the switch housing (2) in the installation hole (1a).

[0032] The first moving member (20) is coupled to move linearly in the left and right directions along the first rack gear part (12) on the main frame (10), and is formed with a combined structure of an upper plate (21) and a lower plate (22) on which a handle (21a) is formed, and a side plate (23) connecting the upper plate (21) and the lower plate (22), and a lifting guide hole (24) for lifting the lifting member (50) may be formed in the side plate (23).

[0033] Here, the second rack gear portion (12) is formed on the bottom surface of the lower plate (22) and is gear-meshed with the second pinion gear (32) described later, which is included in the first operating member (30).

[0034] Meanwhile, the lower plate (22) is formed with a plurality of brake levers (25) that respectively restrict linear movement in the left-right direction of the first moving member (20) and linear movement in the front-back direction of the second moving member (60).

[0035] That is, the brake lever (25) is intended to prevent the first moving member (20) and the second moving member (60) from moving out of the set position when setting the positions of the first moving member (20) and the second moving member (60) on the main frame (10).

[0036] The first operating member (30) is formed on the first moving member (20) and connected to the first rack gear part (12) to move the first moving member (20) linearly in the left and right directions, and includes a first rotating rod (31), a first pinion gear (32), and a first handle (33).

[0037] The first rotating rod (31) is vertically connected at both ends to the upper plate (21) and the lower plate (22) of the first moving member (20) so as to be rotatable through bearings.

[0038] The first pinion gear (32) is fixed to the lower side of the first rotating rod (31) that penetrates the lower plate (22) and rotates by the first rotating rod (31), and is gear-meshed with the first rack gear part (12) formed on one side of a structure that forms a bar shape fixed on the plane of the main frame (10), and rotates along the first rack gear part (12).

[0039] The first handle (33) rotates the first rotating rod (31), and is formed exposed on the top plate (21) forming the first moving member (20).

[0040] Accordingly, when the operator rotates the first rotating rod (31) through the first handle (33), the first pinion gear (32) rotates in conjunction with the rotation of the first rotating rod (31), and the first pinion gear (32) can rotate along the first rack gear section (12) that meshes with the gear formed on the main frame (10), and this allows the first moving member (20) to move linearly in the left and right directions on the plane of the main frame (10), and thus the linear movement in the left and right directions can find the separation position of the switch housing (2) or the installation position of the switch housing (2) among the installation holes (1) formed in multiple stages on the fixed frame (1).

[0041] The above lifting drive unit (40) is fixedly positioned on the first moving member (20) to lift the lifting member (50), and includes a lifting motor (41) and a transfer screw (42).

[0042] The lifting motor (41) is fixed to the first moving member (20) and is configured to drive forward or reverse rotation according to the operation signal of an operating switch not shown, and an unillustrated battery may be fixed to the first moving member (20) to supply power necessary for driving the lifting motor (41) in forward or reverse rotation according to the operation signal of the operating switch.

[0043] The above transfer screw (42) is rotatably fixed at both ends to the upper plate (21) and lower plate (22) included in the first moving member (20) through bearings, and rotates in the forward or reverse direction according to the forward or reverse rotation drive of the lifting motor (41) to raise the lifting member (50).

[0044] The lifting member (50) is connected to the lifting drive unit (40), and moves up or down along the transfer screw (42) which rotates in the forward or reverse direction when the lifting motor (41) included in the lifting drive unit (40) is driven in the forward or reverse direction, and this includes a lifting frame (51), a connecting frame (52), and a guide frame (53).

[0045] The lifting frame (51) is coupled to the transfer screw (42) and is raised or lowered according to the forward or reverse rotation of the transfer screw (42). Accordingly, a spiral portion corresponding to the spiral portion on the outer surface of the transfer screw (42) can be formed on the lifting frame (51).

[0046] The guide frame (53) is connected to the lifting frame (51) through the connecting frame (52) that passes through the lifting guide hole (24) formed in the side plate (23) included in the first moving member (20), and is positioned on one side of the first moving member (20) to guide the linear movement of the second moving member (60) in the forward and backward direction.

[0047] The second moving member (60) is a frame structure that is coupled to the guide frame (53) included in the lifting member (50) so as to be able to move linearly in the forward and backward directions. This is formed by a fixing member (61) to which the opening / closing housing (2) is fixed, and a second rack gear part (62) formed on one side of a structure that is in the shape of a bar and moves forward and backward. The fixing member (61) can be formed on the front end side of the frame structure.

[0048] The second operating member (70) is formed on the first moving member (20) and connected to the second rack gear part (62) to move the second moving member (60) linearly in the forward and backward directions, and includes a second rotating rod (71), a second pinion gear (72), and a second handle (73).

[0049] The second rotating rod (71) is vertically connected at both ends to the upper plate (21) and the lower plate (22) of the first moving member (20) so as to be rotatable through bearings.

[0050] The second pinion gear (72) is fixed to the lower side of the second rotating rod (71) and rotates by the second rotating rod (71), and is gear-meshed with the second rack gear portion (62) formed on the second moving member (60).

[0051] The second handle (73) rotates the second rotating rod (71), and is formed exposed on the top plate (21) forming the first moving member (20).

[0052] Accordingly, when the operator rotates the second rotating rod (71) through the second handle (73), the second pinion gear (72) rotates in conjunction with the rotation of the second rotating rod (71), and the second rack gear part (62) that is engaged with the first pinion gear (32) moves linearly in the forward and backward directions. Consequently, the second moving member (60) forming the second rack gear part (62) can move linearly forward toward the direction of the installation hole (1a) formed in the fixed frame (1) or backward toward the installation hole (1a), thereby allowing the switch housing (2) installed in the installation hole (1a) to be separated or the switch housing (2) to be seated in the installation hole (1a).

[0053] Here, since the second pinion gear (72) included in the second operating member (70) is gear-measured with the second rack gear portion (62) of the second moving member (60), when the lifting member (50) and the second moving member (60) connected thereto are lifted, the second operating member (70) can also be lifted in conjunction.

[0054] In this way, as shown in the attached FIGS. 1 to 8, the lift device according to the embodiment of the present invention first moves the first moving member (20) in a straight line along the first rack gear part (12) from the main frame (10) by operating the first operating member (30) so that the second moving member (60) faces the position of the switch housing (2) to be replaced.

[0055] Afterwards, the second moving member (60) is moved forward in the direction of the fixed frame (1) so that the fixing member (61) formed on the front end of the second moving member (60) is positioned on the bottom side of the switch housing (2) to be replaced.

[0056] Next, by driving the lifting motor (41) of the lifting drive unit (40) in the forward direction through an unillustrated operating switch, the lifting member (50), as well as the second moving member (60) and the second operating member (70), are raised, and a part of the opening / closing housing (2) to be separated is inserted into the fixing member (61) formed on the front end of the second moving member (60) to support the opening / closing housing (2), and then the fastening means (e.g., bolt, etc.) is released so that the connection state of the opening / closing housing (2) is released from the installation member (1a) of the fixed frame (1).

[0057] Then, the above-mentioned switch housing (2) can be maintained in a state supported by the above-mentioned fixing member (61).

[0058] Next, the operator drives the lifting motor (41) in reverse rotation through the operating switch, lowering the lifting member (50) as well as the second moving member (60) and the second operating member (70), and then moves the second moving member (60), which is coupled to the lifting member (50), backward so as to move away from the fixed frame (1) through the operation of the second operating member (60).

[0059] Then, the worker can separate the switch housing (2) to be replaced from the fixing member (61).

[0060] Meanwhile, since a new switch housing can be installed in the installation section (1a) from which the switch housing (2) to be replaced has been separated, first, a new switch housing is installed in the fixing section (61) formed on the leading side of the second moving member (60), and then, by operating the first operating member (30), the first moving member (20) is moved linearly in the left and right directions along the first rack gear section (12) on the main frame (10), and by operating the second operating member (70), the second moving member (60) is moved forward, and the fixing section (61) with the new switch housing installed is placed on the lower side of the installation section (1a).

[0061] Afterwards, by driving the lifting motor (41) of the lifting drive unit (40) in the forward direction through the operating switch, the lifting member (50), as well as the second moving member (60) and the second operating member (70), are raised so that the opening / closing housing newly mounted on the fixing member (61) formed on the front end of the second moving member (60) is fitted into the installation member (1a), and at this time, the newly mounted opening / closing housing is supported by the second moving member (60) so that it is prevented from falling.

[0062] Next, after using a fastening means to fasten the switch housing (2) to the mounting hole (1a) of the fixed frame (1), the lifting member (50) is lowered and then the main frame (10) is separated from the fixed frame (1), so that the replacement mounting of the switch housing (2) in the mounting hole (1a) of the fixed frame (1) is easily completed by one worker.

[0063] That is, in the embodiment of the present invention, the work of installing or removing a switch housing (2) having a predetermined load in an installation hole (1a) formed in multiple stages in a fixed frame (1) within a power system body can be easily and safely performed by a single worker.

[0064] Although the technical concept of the lift device for housing assembly of a high-voltage switchgear according to the present invention has been described above together with the accompanying drawings, this is merely an illustrative description of the best embodiment of the present invention and is not intended to limit the invention.

[0065] Accordingly, the present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary knowledge in the art to which the invention pertains can make various modifications without departing from the essence of the invention as claimed in the claims, and such modifications will be within the scope of the claims. Explanation of the symbols

[0066] 1; Fixed frame 1a; Installation hole 2; Switch housing 10; Mainframe 11; Caster 12; 1st rack gear section 13; Alignment frame 14; Fixed piece 20; 1st movable member 21; top plate 21a; handle 22; bottom plate 23; Side plate 24; Lifting guide hole 25; brake lever 30; first operating member 31; 1st rotating rod 32; 1st pinion gear 33; 1st handle 40; lifting drive unit 41; Lifting motor 42; Transfer screw 50; Lifting member 51; Lifting frame 52; Connecting frame 53; Guide frame 60; 2nd movable member 61; fixing device 62; 2nd rack gear section 70; 2nd operating member 71; 2nd rotating rod 72; 2nd pinion gear 73; 2nd handle

Claims

Claim 1 A main frame having a first rack gear section formed thereon that is movable via casters to be in close contact with one surface of a fixed frame having a multi-stage mounting member, and is of the left-right movable type; a first moving member coupled to the main frame to move linearly in the left-right direction along the first rack gear section; a first operating member formed on the first moving member and connected to the first rack gear section to move the first moving member linearly in the left-right direction; a lifting drive unit fixedly disposed on the first moving member; a lifting member connected to the lifting drive unit and moving up and down relative to the first moving member according to the driving of the lifting drive unit; a second moving member coupled to the lifting member and moving linearly in the front-back direction, having a fixing member to which a switch housing is fixed and a second rack gear section formed thereon that is of the front-back movable type; and a second operating member formed on the first moving member and connected to the second rack gear section to move the second moving member linearly in the front-back direction. A lift device for assembling a housing of a high-voltage switchgear, characterized by including Claim 2 A lift device for assembling a housing of a high-voltage switchgear, characterized in that, in claim 1, the main frame has an alignment frame for setting the alignment position of the main frame that is in close contact with one side of the fixed frame, and one or more fixing pieces that contact the fixed frame are formed, and the first rack gear part is formed on one side of a bar-shaped structure formed along the plane of the main frame. Claim 3 A lift device for assembling a housing of a high-voltage switchgear, characterized in that, in claim 1, the first movable member is formed with a combined structure of an upper plate, a lower plate, and a side plate connecting the upper plate and the lower plate, and a lifting guide hole for lifting the lifting member is formed in the side plate. Claim 4 A lift device for assembling a housing of a high-voltage switchgear, characterized in that, in claim 3, a plurality of brake levers are formed on the lower plate to respectively restrict linear movement of the first moving member in the left-right direction and linear movement of the second moving member in the front-back direction. Claim 5 A lift device for assembling a housing of a high-voltage switchgear, characterized in that, in claim 1, the first operating member comprises: a first rotating rod formed perpendicularly to the first moving member; a first pinion gear fixed to the lower side of the first rotating rod and rotated by the first rotating rod, which meshes with the first rack gear; and a first handle that rotates the first rotating rod. Claim 6 A lift device for assembling a housing of a high-voltage switchgear, characterized in that, in claim 1, the lifting drive unit comprises: a lifting motor fixed to the first moving member; and a transfer screw that rotates according to the driving of the lifting motor to lift the lifting member, with both ends fixed vertically to the first moving member. Claim 7 A lift device for assembling a housing of a high-voltage switch, characterized in that, in claim 6, the lifting motor is configured to be driven in a forward or reverse direction according to an operation signal of an operation switch, and a battery is fixed to the first moving member to supply power necessary for driving the lifting motor in a forward or reverse direction according to an operation signal of the operation switch. Claim 8 A lift device for assembling a housing of a high-voltage switchgear, characterized in that, in claim 6, the lifting member comprises: a lifting frame that is coupled to the transfer screw and moves up and down according to the rotation of the transfer screw; and a guide frame that is coupled to the lifting frame as a connecting frame and is disposed on one side of the first moving member to guide linear movement in the front-rear direction of the second moving member. Claim 9 A lift device for assembling a housing of a high-voltage switchgear, characterized in that, in claim 8, the second moving member is a frame structure that moves linearly in the forward and backward directions along the guide frame, the fixing member is formed on the front end side of the frame structure, and the second rack gear part is formed on one side of a bar-shaped structure formed on the upper surface of the frame structure. Claim 10 A lift device for assembling a housing of a high-voltage switchgear, characterized in that, in claim 1, the second operating member comprises: a second rotating rod formed perpendicularly to the first moving member; a second pinion gear fixed to the lower side of the second rotating rod and rotated by the second rotating rod, which meshes with the second rack gear; and a second handle that rotates the second rotating rod. Claim 11 A lift device for assembling a housing of a high-voltage switchgear, characterized in that, in claim 10, the second operating member is configured to be raised together with the lifting member according to the gear meshing of the second pinion gear and the second rack gear part.

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