Low-voltage grounding trolley

Abstract

The utility model discloses a low-voltage grounding trolley which is used for grounding a bus of a low-voltage drawer type power distribution cabinet. The trolley is composed of a grounding trolley body, an in-out vehicle locking mechanism and a grounding mechanism. The low-voltage grounding trolley adopts an in-out vehicle locking mechanism to control locking and unlocking of the trolley, and grounding stability is ensured. The grounding mechanism is in contact with a bus through a three-phase contact and is connected with a ground wire through a three-phase grounding copper bar and a U-shaped grounding copper bar, so that rapid, safe and effective grounding is realized. The design does not need to open a bus chamber cover plate or manually hang a grounding wire, optimizes the grounding process, improves the working efficiency and safety, reduces the space occupation of a power distribution cabinet, is suitable for the maintenance of a low-voltage bus and equipment, and provides a powerful guarantee for the stable operation of a power system.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a low-voltage grounding trolley. Background Art

[0002] In the current low-voltage electrical system, low-voltage complete switchgear is a key component, and its safety and reliability are crucial to the stable operation of the power system. In particular, 0.4kV low-voltage busbars and related equipment, due to their wide application and frequent maintenance needs, put forward higher requirements for safety measures during the maintenance process.

[0003] The traditional 0.4kV low-voltage busbar maintenance grounding method mainly relies on manual hanging of ground wires, which has obvious shortcomings. First, due to the small phase-to-phase spacing of the busbar, the grounding wire clamp is difficult to reliably ground, which may lead to poor grounding and threaten the safety of maintenance personnel. Secondly, manual hanging of the ground wire requires opening the busbar cover, which is a cumbersome process and increases the inconvenience and risk of operation. Finally, when the busbar does not need to be grounded, the traditional grounding wire will occupy the drawer space of the distribution cabinet, reducing the efficiency of the distribution cabinet.

[0004] Therefore, designing a new type of grounding device can improve the safety and efficiency of the low-voltage busbar maintenance process, realize fast, safe and effective grounding of the busbar, ensure the safety of maintenance personnel, and minimize the space occupied by the distribution cabinet. This is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] In view of the working needs and existing problems in the above-mentioned background technology, the present invention has made reflections and innovations thereon, with the aim of providing a low-voltage grounding trolley for fast, safe and effective grounding of the busbar.

[0006] In order to solve the above problems and achieve the above purposes, the utility model adopts the following technical solutions:

[0007] A low-voltage grounding trolley, comprising:

[0008] A grounding trolley body (1), the grounding trolley body (1) having an overall rectangular shape and structure, corresponding one-to-one with the low-voltage drawer-type power distribution cabinet (4), and being detachably connected to the low-voltage drawer-type power distribution cabinet (4);

[0009] A vehicle entry and exit locking mechanism (2), wherein the vehicle entry and exit locking mechanism (2) is detachably connected to the grounded trolley body (1);

[0010] A grounding mechanism (3), wherein the grounding mechanism (3) is detachably connected to the grounding trolley body (1).

[0011] As a preferred embodiment of the present utility model, the grounding trolley body (1) comprises:

[0012] A front panel (11), the front panel (11) being a rectangular plate corresponding one-to-one to the slots of the low-voltage drawer-type power distribution cabinet (4);

[0013] Side panels (12), the side panels (12) being rectangular panels, a total of two panels, fixedly connected to the front panel (11), having rectangular slide rail clips on the two long sides, and a "C"-shaped slide rail groove in the middle, which is detachably connected to the fixed slide rail on the slot of the low-voltage drawer-type power distribution cabinet (4);

[0014] A rear panel (13), the rear panel (13) being a rectangular plate, detachably connected to the two side panels (12), the rear panel (13) having two rectangular grooves, each of which has a plurality of rectangular holes;

[0015] A connecting piece (14), the connecting piece (14) is L-shaped and has a plurality of screw holes;

[0016] A bottom plate (15) is detachably connected to the front panel (11), the side panels (12), and the rear panel (13) via a connecting piece (14), and has a rectangular hole at one end close to the front panel (11).

[0017] As a preferred embodiment of the utility model, the grounding trolley body (1) further comprises a left horizontal handle (16), wherein the left horizontal handle (16) is a "C"-shaped structure and is fixedly connected to one end of the long side close to the front panel (11).

[0018] As a preferred embodiment of the utility model, the grounding trolley body (1) further comprises a right vertical handle (17), wherein the right vertical handle (17) is a "C"-shaped structure and is fixedly connected to one end of the short side close to the front panel (11).

[0019] As a preferred solution of the utility model, the vehicle entry and exit locking mechanism (2) comprises:

[0020] A vehicle entry and exit locking body (21), wherein the vehicle entry and exit locking body (21) is fixedly connected to the front panel (11);

[0021] A vehicle entry / exit locking button (22), wherein the vehicle entry / exit locking button (22) is connected to the vehicle entry / exit locking body (21);

[0022] A locking baffle (23) is connected to the vehicle entry and exit locking body (21), and the shape of the locking baffle (23) corresponds one-to-one to the rectangular hole of the bottom plate (15).

[0023] As a preferred solution of the utility model, the grounding mechanism (3) comprises:

[0024] A three-phase contact (31), wherein the three-phase contact (31) is in plurality and passes through a rectangular hole on the rear panel (13) and is detachably connected to a rectangular groove on the rear panel (13);

[0025] A grounding mechanism connector (32), wherein the grounding mechanism connector (32) is L-shaped, one end of the grounding mechanism connector (32) is detachably connected to the three-phase contact (31) via a screw, and the other end of the grounding mechanism connector (32) is detachably connected to the three-phase grounding copper busbar (33) via a screw;

[0026] A three-phase grounding copper bar (33), the three-phase grounding copper bar (33) being in a strip shape, one end of which is detachably connected to the three-phase contact (31) via a grounding mechanism connector (32), and the other end of which is connected to a U-shaped grounding copper bar (34);

[0027] A U-shaped grounding copper bar (34), wherein the U-shaped grounding copper bar (34) is in a "U" shape, one end of which is connected to the three-phase grounding copper bar (33), and the other end of which is connected to the ground wire.

[0028] The working principle of the utility model is:

[0029] Busbar grounding operation: When busbar grounding is required, first verify that the three-phase busbar has no voltage, then the operator faces the front panel (11) of the low-voltage grounding trolley and presses the entry and exit locking button (22) of the low-voltage grounding trolley, and the locking baffle (23) rises upward, so that the low-voltage grounding trolley enters a movable state; then, the operator holds the left horizontal handle (16) and the right vertical handle (17) respectively, and puts the low-voltage grounding trolley into the space of the low-voltage drawer-type power distribution cabinet (4) that needs to be grounded, and verifies that the equipment has no voltage at the vertical busbar drawer. At this time, the trolley can be completely pushed into the low-voltage drawer-type power distribution cabinet (4); when the three-phase contacts (31) of the low-voltage grounding trolley are in good contact with the busbar, the entry and exit locking button (22) is pressed again, and the entry and exit locking baffle (23) at the bottom of the trolley falls into the rectangular hole on the bottom plate (15) of the grounding trolley body (1), and the low-voltage grounding trolley is locked in the grounding position. At this time, the busbar is connected to the three-phase grounding copper busbar (33) and the U-shaped grounding copper busbar (34) through the three-phase contact (31) of the low-voltage grounding trolley, and finally connected to the ground wire, thereby achieving reliable grounding of the 0.4 kV low-voltage busbar.

[0030] Busbar grounding cancellation operation: After the busbar and equipment maintenance is completed, when the busbar grounding needs to be cancelled, first check that the low-voltage grounding trolley is in good contact with the busbar of the low-voltage drawer-type distribution cabinet (4) and that the busbar grounding is normal. The operator faces the front panel (11) of the low-voltage grounding trolley and presses the in-and-out vehicle locking button (22). The locking baffle (23) rises upward, making the low-voltage grounding trolley movable; then, the operator holds the left horizontal handle (16) and the right vertical handle (17) respectively, and pulls the low-voltage grounding trolley outward until the three-phase contact (31) is completely separated from the busbar of the low-voltage drawer-type distribution cabinet. Move the low-voltage grounding trolley to the specified location in the distribution room to complete the busbar grounding cancellation operation.

[0031] Beneficial effects of the utility model:

[0032] 1. The utility model improves safety: by designing a special low-voltage grounding trolley, the low-voltage busbar can be reliably grounded without opening the busbar room cover and manually hanging the grounding wire. This not only avoids the problem of poor grounding caused by the small phase-to-phase spacing of the busbar, but also reduces the safety risk of personnel during the maintenance process, effectively ensuring the safety of maintenance personnel.

[0033] 2. The utility model improves work efficiency: The utility model simplifies the operation process of busbar grounding, eliminating the tedious steps of opening the busbar room cover and manually hanging the grounding wire, thereby shortening the time for switching operation and arranging safety measures. This not only improves the efficiency of maintenance work, but also reduces the safety risks caused by improper operation.

[0034] 3. The utility model optimizes space utilization: when the busbar does not need to be grounded, the low-voltage grounding trolley can be easily moved out of the distribution cabinet and no longer occupies the drawer space of the distribution cabinet, thereby improving the utilization efficiency of the distribution cabinet.

[0035] 4. The utility model enhances practicality: The utility model can be widely used in the maintenance of low-voltage busbars and equipment, optimizes the process of installing grounding wires, and has strong practicality and versatility. Whether in the construction of new power distribution systems or in the transformation of old systems, it can play an important role in promoting the standardization, normalization and safety of busbar grounding of low-voltage drawer-type switch cabinets. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is one of the working state schematic diagrams of the low-voltage grounding trolley of the utility model;

[0037] Figure 2 This is the second schematic diagram of the working state of the low-voltage grounding trolley of the utility model;

[0038] Figure 3 This is the third schematic diagram of the working state of the low-voltage grounding trolley of the utility model;

[0039] Figure 4 This is one of the overall three-dimensional structural schematic diagrams of the low-voltage grounding trolley of the utility model;

[0040] Figure 5 This is the second schematic diagram of the overall three-dimensional structure of the low-voltage grounding trolley of the utility model;

[0041] Figure 6 This is the third schematic diagram of the overall three-dimensional structure of the low-voltage grounding trolley of the utility model;

[0042] Figure 7 This is the fourth schematic diagram of the overall three-dimensional structure of the low-voltage grounding trolley of the utility model;

[0043] Figure 8 This is the fifth schematic diagram of the overall three-dimensional structure of the low-voltage grounding trolley of the utility model;

[0044] Among them, the numbers in the figure are: 1—grounding trolley body, 11—front panel, 12—side panel, 13—rear panel, 14—connecting part, 15—bottom plate, 16—left horizontal handle, 17—right vertical handle, 2—entry and exit locking mechanism, 21—entry and exit locking body 22—entry and exit locking button, 23—locking baffle, 3—grounding mechanism, 31—three-phase contact, 32—grounding mechanism connecting part, 33—three-phase grounding copper busbar, 34—U-shaped grounding copper busbar, 4—low-voltage drawer-type distribution cabinet. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the utility model patent more clear, the utility model patent is further described in detail with reference to the accompanying drawings and specific embodiments; it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model patent; in addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model patent.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] like Figure 1 — Figure 8 A low voltage grounding trolley is shown, which comprises:

[0048] A grounding trolley body 1, the overall shape and structure of the grounding trolley body 1 is rectangular, corresponds to the low-voltage drawer-type power distribution cabinet 4 one by one, and can be detachably connected to the low-voltage drawer-type power distribution cabinet 4;

[0049] A vehicle entry and exit locking mechanism 2, wherein the vehicle entry and exit locking mechanism 2 is detachably connected to the grounded vehicle body 1;

[0050] The grounding mechanism 3 is detachably connected to the grounding trolley body 1 .

[0051] Further, such as Figure 4 — Figure 6 As shown, the grounding trolley body 1 includes:

[0052] A front panel 11, which is a rectangular plate and corresponds one-to-one with the slots of the low-voltage drawer-type power distribution cabinet 4;

[0053] Side panels 12, which are rectangular panels, 2 in total, fixedly connected to the front panel 11, with rectangular slide rail clips on the two long sides and a "C"-shaped slide rail groove in the middle, which is detachably connected to the fixed slide rail on the 4 slots of the low-voltage drawer-type power distribution cabinet;

[0054] A rear panel 13, which is a rectangular plate and is detachably connected to the two side panels 12. The rear panel 13 has two rectangular grooves, and the grooves have a plurality of rectangular holes;

[0055] A connecting piece 14, wherein the connecting piece 14 is "L"-shaped and has a plurality of screw holes;

[0056] The bottom plate 15 is detachably connected to the front panel 11 , the side panels 12 , and the rear panel 13 via a connector 14 , and has a rectangular hole at one end close to the front panel 11 .

[0057] Specifically, Figure 6 As shown, the grounding trolley body 1 further includes a left horizontal handle 16 , which is a “C”-shaped structure and is fixedly connected to one end of the long side close to the front panel 11 .

[0058] Specifically, Figure 6 As shown, the grounding trolley body 1 further includes a right vertical handle 17 , which is a “C”-shaped structure and is fixedly connected to one end of the short side close to the front panel 11 .

[0059] Further, such as Figure 6 — Figure 7 As shown, the vehicle entry and exit locking mechanism 2 includes:

[0060] A vehicle entry and exit locking body 21, wherein the vehicle entry and exit locking body 21 is fixedly connected to the front panel 11;

[0061] A vehicle entry and exit locking button 22, wherein the vehicle entry and exit locking button 22 is connected to the vehicle entry and exit locking body 21;

[0062] The locking baffle 23 is connected to the vehicle entry and exit locking body 21 , and the shape of the locking baffle 23 corresponds to the rectangular hole of the bottom plate 15 one by one.

[0063] Further, such as Figure 4 and Figure 6 — Figure 8 As shown, the grounding mechanism 3 includes:

[0064] Three-phase contacts 31, there are a plurality of three-phase contacts 31, the three-phase contacts 31 pass through the rectangular holes on the rear panel 13, and are detachably connected to the rectangular grooves on the rear panel 13;

[0065] A grounding mechanism connector 32, wherein the grounding mechanism connector 32 is "L"-shaped, one end of the grounding mechanism connector 32 is detachably connected to the three-phase contact 31 by screws, and the other end is detachably connected to the three-phase grounding copper busbar 33 by screws;

[0066] A three-phase grounding copper bar 33, which is in a strip shape, one end of which is detachably connected to the three-phase contact 31 through a grounding mechanism connector 32, and the other end of which is connected to a U-shaped grounding copper bar 34;

[0067] The U-shaped grounding copper bar 34 is in a "U" shape, one end of which is connected to the three-phase grounding copper bar 33, and the other end is connected to the ground wire.

[0068] In summary, a more specific embodiment of the present invention is:

[0069] Before implementing grounding, the busbar of the distribution cabinet should be shut down by switching operations, and the circuits that may supply power to the busbar should be disconnected. Each circuit must have an obvious disconnection point.

[0070] Busbar grounding operation: When busbar grounding is required, first verify that the three-phase busbar has no voltage, then the operator faces the front panel 11 of the low-voltage grounding trolley, presses the entry and exit locking button 22 of the low-voltage grounding trolley, and the locking baffle 23 rises upward, making the low-voltage grounding trolley movable; then, the operator holds the left horizontal handle 16 and the right vertical handle 17 respectively, puts the low-voltage grounding trolley into the space of the low-voltage drawer-type distribution cabinet 4 that needs to be grounded, and verifies that the equipment has no voltage at the vertical busbar drawer pull-out position of the low-voltage grounding trolley. At this time, the trolley can be completely pushed into the low-voltage drawer-type distribution cabinet 4; when the three-phase contacts 31 of the low-voltage grounding trolley are in good contact with the busbar, press the entry and exit locking button 22 again, and the entry and exit locking baffle 23 at the bottom of the trolley falls into the rectangular hole on the bottom plate 15 of the grounding trolley body 1, and the low-voltage grounding trolley is locked in the grounding position. At this time, the busbar is connected to the three-phase grounding copper bar 33 and the U-shaped grounding copper bar 34 through the three-phase contact 31 of the low-voltage grounding trolley, and finally connected to the ground wire to achieve reliable grounding of the 0.4kV low-voltage busbar. The staff is more than 10m away from the grounding point of the utility model and the low-voltage drawer-type distribution cabinet 4, and the busbar can be grounded at multiple locations to ensure the personal safety of the staff.

[0071] Busbar grounding cancellation operation: After the busbar and equipment maintenance is completed, when the busbar grounding needs to be cancelled, first check that the low-voltage grounding trolley is in good contact with the busbar of the low-voltage drawer-type distribution cabinet 4 and that the busbar grounding is normal. The operator faces the front panel 11 of the low-voltage grounding trolley, presses the in-and-out vehicle locking button 22, and the locking baffle 23 rises upward, making the low-voltage grounding trolley movable; then, the operator holds the left horizontal handle 16 and the right vertical handle 17 respectively, and pulls the low-voltage grounding trolley outward until the three-phase contact 31 is completely separated from the busbar of the low-voltage drawer-type distribution cabinet. Move the low-voltage grounding trolley to the specified location in the distribution room to complete the busbar grounding cancellation operation.

[0072] Finally, it should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the scope of protection of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A low voltage grounding trolley, characterized in that: It includes: A grounding trolley body (1), the grounding trolley body (1) having an overall rectangular shape and structure, corresponding one-to-one with the low-voltage drawer-type power distribution cabinet (4), and being detachably connected to the low-voltage drawer-type power distribution cabinet (4); A vehicle entry and exit locking mechanism (2), wherein the vehicle entry and exit locking mechanism (2) is detachably connected to the grounded trolley body (1); A grounding mechanism (3), wherein the grounding mechanism (3) is detachably connected to the grounding trolley body (1).

2. A low-voltage grounding trolley according to claim 1, characterized in that: The grounding trolley body (1) comprises: A front panel (11), the front panel (11) being a rectangular plate corresponding one-to-one to the slots of the low-voltage drawer-type power distribution cabinet (4); Side panels (12), the side panels (12) being rectangular panels, a total of two panels, fixedly connected to the front panel (11), having rectangular slide rail clips on the two long sides, and having a "C"-shaped slide rail groove in the middle, which is detachably connected to the fixed slide rail on the slot of the low-voltage drawer-type power distribution cabinet (4); A rear panel (13), the rear panel (13) being a rectangular plate, detachably connected to the two side panels (12), the rear panel (13) having two rectangular grooves, each of which has a plurality of rectangular holes; A connecting piece (14), wherein the connecting piece (14) is L-shaped and has a plurality of screw holes; A bottom plate (15) is detachably connected to the front panel (11), the side panels (12), and the rear panel (13) via a connecting piece (14), and has a rectangular hole at one end close to the front panel (11).

3. A low-voltage grounding trolley according to claim 2, characterized in that: The grounding trolley body (1) further comprises a left horizontal handle (16), wherein the left horizontal handle (16) is a "C"-shaped structure and is fixedly connected to one end of a long side close to the front panel (11).

4. A low-voltage grounding trolley according to claim 2, characterized in that: The grounding trolley body (1) further comprises a right vertical handle (17), wherein the right vertical handle (17) is a "C"-shaped structure and is fixedly connected to one end of the short side close to the front panel (11).

5. A low-voltage grounding trolley according to claim 1, characterized in that: The vehicle entry and exit locking mechanism (2) comprises: A vehicle entry and exit locking body (21), wherein the vehicle entry and exit locking body (21) is fixedly connected to the front panel (11); A vehicle entry / exit locking button (22), wherein the vehicle entry / exit locking button (22) is connected to the vehicle entry / exit locking body (21); A locking baffle (23) is connected to the vehicle entry and exit locking body (21), and the shape of the locking baffle (23) corresponds one-to-one to the rectangular hole of the bottom plate (15).

6. A low-voltage grounding trolley according to claim 1, characterized in that: The grounding mechanism (3) comprises: A three-phase contact (31), wherein the three-phase contact (31) is in plurality and passes through a rectangular hole on the rear panel (13) and is detachably connected to a rectangular groove on the rear panel (13); A grounding mechanism connector (32), wherein the grounding mechanism connector (32) is "L"-shaped, one end of the grounding mechanism connector (32) is detachably connected to the three-phase contact (31) via a screw, and the other end of the grounding mechanism connector (32) is detachably connected to the three-phase grounding copper busbar (33) via a screw; A three-phase grounding copper bar (33), the three-phase grounding copper bar (33) being in a strip shape, one end of which is detachably connected to the three-phase contact (31) via a grounding mechanism connector (32), and the other end of which is connected to a U-shaped grounding copper bar (34); A U-shaped grounding copper bar (34), wherein the U-shaped grounding copper bar (34) is in a "U" shape, one end of which is connected to the three-phase grounding copper bar (33), and the other end of which is connected to the ground wire.

Images