Novel grounding hook suitable for rigid contact network

Abstract

The utility model discloses a novel grounding hook suitable for a rigid contact network, and relates to the technical field of electric power safety tools. The novel grounding hook suitable for the rigid contact network comprises a grounding hook head, springs are fixedly connected to the inner walls of the two sides of the grounding hook head, a busbar protective cover is fixedly connected to the ends, away from the grounding hook head, of the springs, and the outer wall of the busbar protective cover is movably connected with the inner wall of the grounding hook head. A lock catch is fixedly connected to the bottom of the outer wall of one side of the grounding hook head, and a ground wire connecting hole is formed in the inner wall of the lock catch in a penetrating mode. According to the utility model, the double-arc grounding wire head is adopted, the busbar is directly hung, the double-arc grounding hook is more matched with the pi-shaped busbar, the contact fitting area is about 19cm < 2 >, the minimum sectional area allowed by thermal stability of a conductor is met, the hanging is more stable, the contact is firm, the falling risk is extremely low, and other accessory equipment is not needed; the safety and reliability are high.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power safety tools, in particular to a novel grounding hook suitable for a rigid contact network. Background Art

[0002] With the continuous advancement of modern rail transit systems, people's demand for operating efficiency is also constantly increasing. In daily maintenance and fault repair work, grounding wires play an indispensable role in safety assurance. Before the maintenance / repair work is carried out, the contact network maintenance worker needs to prepare a complete set of equipment including a tester, a grounding rod, a grounding hook, and a grounding wire. First, use the tester to test the electricity and then hang the grounding wire. The preparatory work for maintenance / repair work takes a long time. In order to improve efficiency, it is necessary to design a rigid contact network grounding hook with low cost, simple operation, scientific design and good safety.

[0003] There are two ways to ground the rigid overhead contact network in urban rail transit: the first one uses a flexible grounding hook to hang the ground wire on the grounding ring, and its contact area is about 11cm2. This method of hanging the ground wire has the advantages of being simple and time-saving, but the prerequisite is that the grounding ring must be installed on the bus before it can be used. For emergency treatment of overhead contact network failures, the ground wire needs to be hung at the grounding ring, which is time-consuming and inconvenient.

[0004] The second method uses a rigid manual grounding rod to rotate the grounding wire hook fixture and the card plate to clamp the busbar, thereby hanging the ground wire, and its contact and fitting area is about 22cm2. This method of hanging the ground wire does not rely on the grounding ring, and can be directly hung at any positioning point, which is convenient for power outage maintenance and emergency handling of faults. The disadvantage is that the hook fixture and the card plate are short, the stability is insufficient during hanging, the card plate is easy to get stuck, and the grounding wire hook is easily separated from the grounding rod when the grounding rod is rotated, resulting in equipment safety hazards and increased safety risks.

[0005] The above two ground wire hanging methods can protect the safety of people and equipment, but they both have corresponding disadvantages, which reduce the efficiency of electrical grounding and increase safety risks. Therefore, we propose a new grounding hook suitable for rigid contact network to solve the problems raised in the above background technology. Utility Model Content

[0006] The purpose of the utility model is to provide a new type of grounding hook suitable for a rigid contact network, which solves the technical problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of grounding hook suitable for a rigid contact network, comprising a grounding hook head, springs are fixedly connected to the inner walls on both sides of the grounding hook head, a bus protection cover is fixedly connected to the end of the spring away from the grounding hook head, the outer wall of the bus protection cover is movably connected to the inner wall of the grounding hook head, a lock buckle is fixedly connected to the bottom of the outer wall of one side of the grounding hook head, and a ground wire connection hole is opened through the inner wall of the lock buckle.

[0008] Preferably, the busbar protective cover is symmetrically arranged in the grounding hook head, and the busbar protective cover is arranged in an "inverted C shape".

[0009] Preferably, a movable groove 1 is formed on the top outer wall of the grounding hook head, movable groove 2 is formed on the outer walls on both sides of the grounding hook head, and the outer walls at both ends of the busbar protective cover are inserted into the movable groove 1 and the movable groove 2.

[0010] Preferably, the top of the inner wall of the grounding hook head abuts against the upper surface of the π-type bus in the urban rail transit, and the outer walls on both sides of the bus protection cover abut against the side outer walls of the π-type bus in the urban rail transit.

[0011] Preferably, the grounding hook head is connected to the external grounding rod through the ground wire connection hole, and the grounding hook head and the grounding rod are fastened by a locking connection.

[0012] Preferably, a hole is drilled on the upper side of the ground wire connection hole to connect the ground wire in series.

[0013] Compared with the related art, the new grounding hook suitable for rigid contact network provided by the utility model has the following beneficial effects:

[0014] 1. Safety: This new grounding hook adopts a double-arc grounding wire head to directly hang the bus. At the same time, the double-arc grounding hook is more suitable for the π-type bus. Its contact fitting area is about 19cm2, which meets the minimum cross-sectional area allowed by the thermal stability of the conductor. At the same time, its hanging is more stable, the contact is firm, the risk of falling is extremely small, and there is no need to add other auxiliary equipment. It has high safety and reliability.

[0015] 2. Economical: The use of this new grounding hook does not require the installation of a grounding ring on the main line, thereby reducing installation costs and time and improving economic benefits.

[0016] 3. Efficiency: There is no need to use the traditional rigid grounding hook to tighten by rotating the grounding rod. The grounding process can be completed by simply hanging the hook directly on the busbar, which improves the efficiency of hanging the ground wire. Using this new grounding hook, the ground wire hanging time is reduced from 6 minutes per set to 3 minutes per set, and the ground wire hanging efficiency is increased by 50%, which improves the efficiency of subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the cutaway structure of the utility model;

[0019] Figure 3 It is a right side view of the utility model;

[0020] Figure 4 It is a top view of the utility model.

[0021] In the figure: 1. Grounding hook head; 2. Spring; 3. Busbar protective cover; 4. Lock; 5. Grounding wire connection hole; 6. Movable slot 1; 7. Movable slot 2. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] Embodiment 1:

[0024] See also Figure 1-Figure 4 The utility model provides a technical solution: a new type of grounding hook suitable for a rigid contact network, comprising a grounding hook head 1, springs 2 are fixedly connected to the inner walls on both sides of the grounding hook head 1, a busbar protective cover 3 is fixedly connected to the end of the spring 2 away from the grounding hook head 1, the outer wall of the busbar protective cover 3 is movably connected to the inner wall of the grounding hook head 1, a lock buckle 4 is fixedly connected to the bottom of the outer wall of one side of the grounding hook head 1, and a ground wire connection hole 5 is opened through the inner wall of the lock buckle 4.

[0025] In this embodiment, when in use, the device is hung on the π-type bus in the existing urban rail transit, and the bus protection cover 3 is connected by setting the spring 2. The grounding hook head 1 is connected to the grounding rod through the grounding connection hole 5, and a lock buckle 4 is provided at the bottom to make the connection tight, and a hole is drilled on the upper side of the grounding connection hole 5 to connect the ground wire in series.

[0026] The busbar protection cover 3 is symmetrically arranged in the grounding hook head 1, and the busbar protection cover 3 is arranged in an "inverted C shape".

[0027] In this embodiment, the new grounding hook is made of aluminum alloy, which is lightweight, corrosion-resistant and has good thermal conductivity.

[0028] Among them, the top outer wall of the grounding hook head 1 is provided with a movable groove 1 6 , the outer walls on both sides of the grounding hook head 1 are provided with movable grooves 2 7 , and the outer walls at both ends of the busbar protective cover 3 are inserted in the movable groove 1 6 and the movable groove 2 7 .

[0029] In this embodiment, the spring 2, the movable groove 1 6 and the movable groove 2 7 are arranged to facilitate the movement of the busbar protection cover 3 and adjust it according to the width of the busbar.

[0030] The top of the inner wall of the grounding hook head 1 abuts against the upper surface of the π-type bus in the urban rail transit, and the outer walls on both sides of the bus protection cover 3 abut against the side outer walls of the π-type bus in the urban rail transit.

[0031] In this embodiment, the top of the inner wall of the grounding hook head 1 abuts against the upper surface of the π-type bus in the urban rail transit, and the outer walls on both sides of the bus protection cover 3 abut against the side outer walls of the π-type bus in the urban rail transit, clamping the bus and contacting the bus on three sides, reducing the risk of falling and increasing safety and reliability.

[0032] The grounding hook head 1 is connected to the external grounding rod through the grounding wire connection hole 5, and the grounding hook head 1 and the grounding rod are connected and fastened through the locking buckle 4.

[0033] Among them, a hole is drilled on the upper side of the ground wire connection hole 5 to connect the ground wire in series.

[0034] After actual testing, the grounding wire hanging device has obvious effects. First, the grounding wire hanging time is reduced from 6 minutes to 3 minutes. Second, the contact surface between the grounding hook and the busbar is increased, which ensures the safety of personnel and equipment to a greater extent. Third, the grounding wire hanging operation process is simplified, avoiding damage caused by the traditional rotating grounding rod when hanging the grounding wire, and reducing equipment safety hazards. The parameters of the device are consistent with the professional grounding rods and grounding wires of the subway overhead contact network, and can be directly matched with existing equipment.

[0035] Embodiment 2:

[0036] This embodiment is a further optimization of Embodiment 1. On the basis of Embodiment 1, the material of the grounding hook is changed from aluminum alloy to stainless steel, which may also realize the present new patent. Therefore, various replacements of the materials of the components of this patent are alternative solutions.

[0037] Modification of the height, thickness and other parameters of the double arc type grounding hook in the utility model may also realize the present patent, so the double arc type grounding hook with changed dimensions of the present patent is an alternative solution.

[0038] Working principle: The new grounding hook of the utility model is responsible for connecting the ground wire to the bus, which fits the π-type bus. The actual contact area is about 19cm2. According to the formula for the minimum cross-sectional area allowed by the thermal stability of the conductor, Smin is 16.3mm2 (the short-circuit current is 20000A and the short-circuit time is 5ms), which fully meets the requirements. At the same time, its connection is more stable, the contact is firm, the risk of falling is small, and the safety and reliability are high. The grounding wire connection hole 5 is used to connect the double-arc grounding hook and the grounding rod to make their connection firm and reliable.

[0039] The upper part of the grounding hook head 1 is in close contact with the upper surface of the busbar, and the busbar protective cover 3 clamps the busbar on the side and contacts with three sides of the busbar, thereby reducing the risk of falling and increasing safety and reliability.

[0040] The grounding hook head 1 is connected with the grounding rod through the grounding wire connection hole 5, and a lock buckle 4 is provided at the bottom to make the connection tight. A hole is drilled on the upper side of the grounding wire connection hole 5 to connect the ground wire in series.

[0041] During use, the new grounding wire hook does not need to rotate the grounding rod for tightening. It only needs to be directly hung on the bus to complete the grounding process. It is convenient and easy, solves the restriction that existing installations require grounding hanging rings, reduces the safety risk of the ground wire head falling off, and improves the safety and reliability of ground wire hanging.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new type of grounding hook suitable for a rigid contact network, comprising a grounding hook head (1), characterized in that: The inner walls of both sides of the grounding hook head (1) are fixedly connected with springs (2); one end of the spring (2) away from the grounding hook head (1) is fixedly connected with a busbar protection cover (3); the outer wall of the busbar protection cover (3) is movably connected to the inner wall of the grounding hook head (1); a lock buckle (4) is fixedly connected to the bottom of the outer wall of one side of the grounding hook head (1); and a ground wire connection hole (5) is formed through the inner wall of the lock buckle (4).

2. A new type of grounding hook suitable for rigid contact network according to claim 1, characterized in that: The busbar protection cover (3) is symmetrically arranged inside the grounding hook head (1), and the busbar protection cover (3) is arranged in an "inverted C-shape".

3. The new grounding hook suitable for rigid contact network according to claim 1 is characterized by: The top outer wall of the grounding hook head (1) is provided with a movable groove 1 (6), the outer walls on both sides of the grounding hook head (1) are provided with movable groove 2 (7), and the outer walls at both ends of the busbar protective cover (3) are inserted into the movable groove 1 (6) and the movable groove 2 (7).

4. The new grounding hook suitable for rigid contact network according to claim 1 is characterized by: The top of the inner wall of the grounding hook head (1) abuts against the upper surface of the π-type bus in the urban rail transit, and the outer walls on both sides of the bus protection cover (3) abut against the side outer walls of the π-type bus in the urban rail transit.

5. The novel grounding hook suitable for rigid contact network according to claim 1 is characterized in that: The grounding hook head (1) is connected to an external grounding rod through a grounding wire connection hole (5), and the grounding hook head (1) and the grounding rod are connected and fastened through a lock buckle (4).

6. The novel grounding hook suitable for rigid contact network according to claim 1 is characterized by: A hole is drilled on the upper side of the ground wire connection hole (5) to connect the ground wire in series.

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