Novel 400V three-phase short-circuit grounding device for narrow space

Abstract

The utility model discloses a 400V novel three-phase short-circuit grounding device for a narrow space, which relates to the technical field of three-phase circuit short-circuit grounding and comprises a three-phase grounding wire, a clamping assembly and a grounding operating rod. The three-phase ground wire comprises a main wire and three connecting wires connected with the main wire, a clamping head is arranged on the main wire, and a wiring nose is arranged on each connecting wire; the clamping assembly comprises a pair of clamping pliers, a wiring hole formed in the clamping pliers and a combining piece; the expansion spring is used as a force application point for fastening the conductor, so that the clamping pincers are stably connected with the conductor, and the grounding operation rod is detachably connected with the grounding operation rod through the connector, so that the grounding operation rod and the clamping pincers are combined and separated, and the detachable purpose is achieved; therefore, safe and standard discharge is realized when three-phase short-circuit grounding is carried out on maintenance equipment, and the purpose of conveniently carrying out three-phase short-circuit grounding in a narrow space is also realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to three -phase circuit short -circuit grounding technical field, concretely relates to a 400V novel three -phase short -circuit grounding device for narrow space. BACKGROUND

[0002] 400V three -phase short -circuit grounding device is widely used in the occasions of the box -type transformer, low -voltage equipment, low -voltage power supply busbar maintenance safety arrangement of each electric power system. The conductor end clamp and the grounding operating rod of the low -voltage 400V interface device used by each operation and maintenance unit are the integral structure of non -detachable, and the length of the rod handle of the grounding operating rod is generally 400-500mm. When the three -phase short -circuit grounding of 400V low -voltage equipment is done, due to the space distance limitation between the box -type transformer and the busbar, the distance between the low -voltage side lead of the transformer and the box is less than 400mm, and the distance between the low -voltage busbar of distribution is only about 50mm, so when the electricity is checked and the grounding wire is hung after discharging, the conductor end clamp and the grounding operating rod do not have enough operating space to ground. In the actual use, the existing three -phase short -circuit grounding device is inconvenient to ground due to the large size, and the connection is not reliable after hanging, and the three -phase short -circuit grounding device is difficult to hang due to the limited space. SUMMARY

[0003] The utility model discloses a main purpose lies in providing a 400V novel three -phase short -circuit grounding device for narrow space, and the three -phase short -circuit grounding device of existing is limited in the narrow space, and the connection is not reliable, and the problem of easy falling and difficult hanging is solved when operating.

[0004] In order to achieve the above object, the utility model provides a 400V novel three -phase short -circuit grounding device for narrow space, including three -phase grounding wire, grounding operating rod, the three -phase grounding wire includes main line and three connecting wires connected with main line, be equipped with the clamping head on the main line, be equipped with the connecting wire nose on the connecting wire, still include:

[0005] The clamping assembly includes a clamping jaw, a wire hole disposed on the clamping jaw, and a combination piece. The clamping jaw includes a left jaw body and a right jaw body that are hingedly connected to each other. An expansion spring is disposed between the left jaw body and the right jaw body. The connecting wire nose and the wire hole are detachably connected. The grounding operating rod is detachably connected to the combination piece, so that the grounding operating rod and the clamping jaw are detachably connected.

[0006] As a further improvement of the utility model, the clamping head includes a clamping seat, a clamping rod disposed on the clamping seat, and a clamping plate rotatably disposed on the clamping rod. The clamping seat has a clamping groove. The clamping plate is located in the clamping groove.

[0007] As a further improvement of the utility model, the left forceps body and the right forceps body adopt aluminum magnesium alloy material; the expansion spring adopts copper material.

[0008] As a further improvement of the utility model, the combination piece is internally provided with internal threads; the grounding operating rod is externally provided with external threads, and the grounding operating rod is connected with the combination piece through threads.

[0009] As a further improvement of the utility model, the size of the wiring hole is consistent with the size of the wiring nose, and the wiring hole is located on the left forceps body; the combination piece is located on the right forceps body.

[0010] The utility model has the beneficial effects of:

[0011] The expansion spring is arranged as the force point of the fastening conductor, so that the forceps are not loosened when the short-circuit current passes through, the clamping forceps are stably connected with the conductor, the connection hole is arranged to facilitate the connection with the wiring nose, the combination piece is detachably connected with the grounding operating rod, the combination and separation of the grounding operating rod and the clamping forceps are realized, the detachable purpose is achieved, the safe and standard discharge during the maintenance equipment three-phase short-circuit grounding is realized, the purpose of conveniently performing three-phase short-circuit grounding in a narrow space is realized, the time of safety arrangement and measure arrangement and execution is shortened, the efficiency of safety arrangement and measure arrangement and execution and the reliability of grounding are improved, and the difficulty of the operation personnel in arranging safety measures and measures for three-phase short-circuit grounding in a narrow space is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is an overall structural schematic view of the utility model of a 400V novel three-phase short-circuit grounding device for a narrow space;

[0013] Figure 2 It is a clamping forceps structural schematic view of the utility model of a 400V novel three-phase short-circuit grounding device for a narrow space;

[0014] Figure 3 It is a combination piece structural schematic view of the utility model of a 400V novel three-phase short-circuit grounding device for a narrow space; Figure 2 It is an enlarged structural schematic view of the middle A;

[0015] MARKS OF THE DRAWINGS:

[0016] 1, main line; 2, connecting line; 201, wiring nose; 3, clamping head; 4, grounding operating rod; 5, clamping forceps; 6, wiring hole; 7, combination piece; 8, clamping seat; 9, clamping rod; 10, clamping plate; 11, clamping groove; 12, left forceps body; 13, right forceps body; 14, expansion spring; 15, internal thread; 16, external thread; 17, screw rod. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. In the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0018] In an embodiment, referring to Figure 1 The utility model discloses a 400V novel three -phase short -circuit grounding device for narrow space, including three -phase ground wire, clamping component, ground operating lever 4.

[0019] Among them, three -phase ground wire includes main line 1 and the three connecting wires 2 connected with main line 1, is equipped with clamping head 3 on main line 1, is equipped with connecting wire nose 201 on connecting wire 2;Clamping assembly includes clamping forceps 5, connecting hole 6 and combination piece 7 set up on clamping forceps 5, connecting wire nose 201 and connecting hole 6 are detachably connected;Ground operating lever 4 and combination piece 7 are detachably connected, so that ground operating lever 4 and clamping forceps 5 are detachably connected.

[0020] Further, referring to Figure 1 Clamping head 3 includes clamping seat 8, clamping rod 9 set up on clamping seat 8, clamping plate 10 rotationally set up on clamping rod 9, and clamping groove 11 is equipped in clamping seat 8, and clamping plate 10 is located in clamping groove 11.

[0021] Preferably, clamping seat 8 is "U" structure, and the hollow part of clamping seat 8 forms clamping groove 11.

[0022] Preferably, clamping rod 9 adopts threaded rod, and screw hole is arranged on clamping seat 8, and one end of clamping rod 9 is connected with the screw hole through screwing and located in clamping groove 11.

[0023] Preferably, connecting hole is arranged on clamping plate 10, and the end of clamping rod 9 located in clamping groove 11 is connected with the connecting hole.

[0024] Further, referring to Figure 2 Clamping forceps 5 include mutually hinged left forceps body 12 and right forceps body 13, and expansion spring 14 is arranged between left forceps body 12 and right forceps body 13.

[0025] Preferably, first rotation hole and second rotation hole are arranged on left forceps body 12 and right forceps body 13 respectively, first rotation shaft is arranged in first rotation hole, and right forceps body 13 is rotationally connected with first rotation shaft through second rotation hole, so that left forceps body 12 and right forceps body 13 are hinged.

[0026] Further, referring toFigure 2 The left clamp body 12 and the right clamp body 13 are made of aluminum-magnesium alloy.

[0027] Preferably, the first rotating shaft is made of aluminum-magnesium alloy.

[0028] In the above arrangement, the left clamp body 12 and the right clamp body 13 made of aluminum-magnesium alloy ensure that the conductor end clamp 5 has sufficient mechanical strength and excellent electrical conductivity; the copper expansion spring 14 serves as a force point for fastening the conductor, and the whole satisfies the requirement that the clamp 5 does not loosen when short-circuit current passes through, and meets the requirements of DC resistance and power frequency voltage resistance tests.

[0029] Further, referring to Figure 3 The inner thread 15 is arranged in the combination piece 7, and the outer thread 16 is arranged on the grounding operating rod 4, and the grounding operating rod 4 is connected with the combination piece 7 through the threads.

[0030] Preferably, the combination piece 7 is a hollow cylinder with one end open, and the closed end of the combination piece 7 is fixedly connected with the clamp 5.

[0031] Preferably, the grounding operating rod 4 is provided with a screw rod 17, and the outer thread 16 is arranged on the screw rod 17.

[0032] In the above arrangement, the combination and separation of the grounding operating rod 4 and the clamp are realized by screwing in and screwing out of the grounding operating rod 4.

[0033] Further, referring to Figure 2 The size of the wire hole 6 is consistent with the size of the wire nose 201, and the wire hole 6 is arranged on the left clamp body 12; and the combination piece 7 is arranged on the right clamp body 13.

[0034] In the embodiment, when in use, first, it is verified that the maintenance equipment has no voltage, and then the grounding end of the three-phase short-circuit grounding device is installed, and then one phase with the grounding operating rod 4 is used to discharge the maintenance equipment with the clamp 5 one by one. Finally, the clamp 5 is pressed open to clamp the conductor end busbar or low-voltage outgoing line.

[0035] When the three-phase short-circuit of the maintenance equipment such as the box-type transformer and the low-voltage power supply bus is operated, the screw rod 17 of the grounding operating rod 4 can be screwed out to separate the combination piece 7 after the discharge is completed, and then the clamp 5 is pressed open to clamp the conductor end busbar or low-voltage outgoing line.

[0036] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A 400V new three-phase short-circuit grounding device for narrow space, comprising a three-phase grounding wire and a grounding operating rod (4); the three-phase grounding wire comprises a main wire (1) and three connecting wires (2) connected with the main wire (1); the main wire (1) is provided with a clamping head (3); the connecting wire (2) is provided with a connecting wire nose (201); characterized in that, Also include: The clamping assembly includes a clamping jaw (5), a wiring hole (6) and a combination piece (7) provided on the clamping jaw (5); the wiring nose (201) is detachably connected with the wiring hole (6); the clamping jaw (5) includes a left jaw body (12) and a right jaw body (13) hinged to each other; the left jaw body (12) and the right jaw body (13) are provided with an expansion spring (14); the grounding operating rod (4) is detachably connected with the combination piece (7), so that the grounding operating rod (4) is detachably connected with the clamping jaw (5); The clamping head (3) includes a clamping seat (8), a clamping rod (9) provided on the clamping seat (8), and a clamping plate (10) rotatably provided on the clamping rod (9); the clamping seat (8) is provided with a clamping groove (11); the clamping plate (10) is located in the clamping groove (11); The clamping seat (8) is a U-shaped structure, and the hollow part of the clamping seat (8) forms the clamping groove (11); the clamping rod (9) is a threaded rod, and the clamping seat (8) is provided with a screw hole, one end of the clamping rod (9) is connected with the screw hole through threads and located in the clamping groove (11); The combination piece (7) is internally provided with an internal thread (15); the grounding operating rod (4) is provided with an external thread (16), and the grounding operating rod (4) is connected with the combination piece (7) through threads.

2. A 400V novel three-phase short-circuit grounding device for narrow spaces according to claim 1, characterized in that: The left jaw body (12) and the right jaw body (13) are made of aluminum magnesium alloy material; the expansion spring (14) is made of copper material.

3. A 400V novel three-phase short-circuit grounding device for narrow spaces according to claim 1, characterized in that: The size of the wiring hole (6) is consistent with the size of the wiring nose (201), and the wiring hole (6) is located on the left jaw body (12); the combination piece (7) is located on the right jaw body (13).

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