CN204905459U - Safe portable earth bar - Google Patents

Abstract

A safe and convenient ground rod, including a connecting rod, one end of the connecting rod is provided with a screw rod, and a wire clamp is threadedly connected to the screw rod; the wire clamp includes a static contact and a moving contact for clamping wires , the moving contact can be in contact with the static contact, and a concave smooth arc-shaped groove is provided on the opposite surface of the static contact and the moving contact; an internal thread hole is preset on the static contact, and an internal thread hole is provided on the internal thread hole There are fixing bolts for clamping the ground wire. The utility model makes a nearly semicircular groove on the contact surface of the static contact and the moving contact according to the circular contour of the wire, so that the contact area between the wire gripper and the wire is increased, and the instantaneous large current is guaranteed to pass smoothly , The contact area is expanded, the friction force is increased, and the connection between the wire and the clamp is reliable and not easy to loosen. In addition, the fixing bolts are preset to the static contact row through the internal threaded holes, and the ground wire can be fixed by tightening the fixing bolts with only one hand during use, which is very convenient to use and reliable in connection.

Description

Safe and convenient ground rod

technical field

The utility model relates to the technical field of electric power maintenance equipment, in particular to a safe and convenient grounding rod.

Background technique

Grounding rods, also known as grounding electrodes and grounding grids, are components designed on the basis of theoretical basis to improve the internal conductivity of the grounding conductor and reduce the resistivity of the external soil of the grounding conductor. The grounding rod has the advantages of simple construction, small footprint, no environmental pollution, long service life and low resistance.

The traditional ground rod includes a wire gripper and a connecting rod. The wire gripper is arranged on the connecting rod. The wire gripper includes two plate-shaped wire gripping contacts, which are similar in structure to the traditional pliers. The head is snap-fitted to the wire.

The traditional ground rod has the following problems due to the structural design of its clamping device: the contact area between the clamping contact and the wire is small, which not only makes its conductivity weak, but also its connection reliability is poor.

Utility model content

(1) Technical issues

How to provide a ground rod with reliable connection and excellent electrical conductivity has become an urgent problem to be solved by those skilled in the art.

(2) Technical solution

The utility model provides a safe and convenient grounding rod, which includes a connecting rod, one end of the connecting rod is provided with a screw rod, and a thread clamp is threaded on the screw rod;

The wire gripper includes a static contact and a moving contact for clamping wires, the moving contact can abut against the static contact, and the fixed contact and the moving contact are opposite to each other. There is a concave smooth arc groove on the top;

An inner threaded hole is preset on the static contact, and a fixing bolt for clamping the grounding wire is arranged on the inner threaded hole.

Preferably, the static contact is provided with a threaded hole, and the screw rod is inserted into the threaded hole; a spring pad for applying a pre-tightening force is provided between the static contact and the screw rod piece.

Preferably, the moving contact is connected to the screw rod, and a spring washer for applying a pre-tightening force is arranged between the moving contact and the screw rod.

Preferably, the screw rod is set through the threaded hole; the end of the screw rod is provided with the movable contact; the movable contact is provided with a card slot, and the movable contact passes through the card The slot is slidably clamped on the static contact.

Preferably, the fixing bolts are internal thread angle bolts.

(3) Beneficial effects

Through the above structural design, the utility model makes a nearly semicircular groove on the contact surface of the static contact and the moving contact according to the circular contour of the wire, so that the contact area between the wire gripper and the wire reaches more than 80%. , at least 4-5 times larger than the contact area of traditional ground rods. The advantages of such a design are: ensuring the smooth passing of instantaneous large current, expanding the contact area, increasing friction, and the connection between the wire and the clamp is reliable and not easy to loosen.

Description of drawings

Fig. 1 is the partial structure schematic diagram of safe and portable ground rod in the utility model embodiment;

Fig. 2 is a structural schematic diagram of the connection between the screw rod and the moving contact in the embodiment of the utility model;

In Figure 1 and Figure 2, the corresponding relationship between component names and drawing numbers is:

Screw rod 1, static contact 2, moving contact 3, internal thread hole 4.

Detailed ways

The implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

In the description of the present utility model, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer" ", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integratively connected; it can be mechanically or electrically connected; it can be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Please refer to Fig. 1 and Fig. 2, wherein Fig. 1 is a partial structural diagram of a safe and convenient grounding rod in an embodiment of the utility model; Fig. 2 is a schematic diagram of a structure connecting a screw rod and a moving contact in an embodiment of the utility model.

The utility model provides a safe and convenient grounding rod, which includes a connecting rod, one end of the connecting rod is provided with a screw rod 1, and a wire clamp is threaded on the screw rod 1; the wire clamp includes a clamp for clamping the wire The static contact 2 and the moving contact 3, the moving contact 3 can be in contact with the static contact 2, and a concave smooth arc-shaped groove is provided on the opposite surface of the static contact 2 and the moving contact 3.

In the above structural design, the wire clamp includes a movable contact 3 and a static contact 2, and the movable contact 3 can slide relative to the static contact 2, thereby clamping the wire. A concave smooth arc-shaped groove is set on the side where the moving contact 3 and the static contact 2 abut. The shaped groove can form a circular, elliptical or nearly circular connection hole, and the wire is arranged in the connection hole.

Compared with the traditional plate structure, the utility model makes a nearly semicircular groove on the contact surface of the static contact 2 and the moving contact 3 according to the circular contour of the wire, so that the contact between the wire gripper and the wire The area reaches more than 80%, which is at least 4-5 times larger than the contact area of traditional grounding rods. The advantages of such a design are: ensuring the smooth passing of instantaneous large current, expanding the contact area, increasing friction, and the connection between the wire and the clamp is reliable and not easy to loosen.

In the traditional ground rod structure, the connection method of the ground wire is: clamp the ground wire to the static contact through the cooperation of bolts and nuts. In this way, both hands need to act on the bolts and nuts at the same time during the operation, so that the ground rod Very inconvenient to use.

In order to solve this problem, the utility model presets an internally threaded hole 4 with an internal thread on the static contact 2, and sets a fixing bolt on the internally threaded hole 4. In this way, the operator only needs to tighten the fixing bolt during actual use. That is, the whole operation process can be completed with one hand, which makes the utility model easy to use.

In addition, the internal threaded hole 4 is directly formed on the static contact 2, thereby improving the stability of setting the fixing bolt 4 and preventing the ground wire from falling off.

Specifically, the static contact 2 is provided with a threaded hole, and the screw rod 1 is inserted into the threaded hole; a spring washer for applying a pre-tightening force is provided between the static contact 2 and the screw rod 1 .

Specifically, the moving contact 3 is connected to the screw rod 1 , and a spring washer for applying a pre-tightening force is arranged between the moving contact 3 and the screw rod 1 .

A spring washer is arranged at the junction of the screw mandrel 1 and the clamping device, and the pre-tightening force is applied by the spring washer, so that the screw is not easy to loosen when the ground rod swings in the air when the utility model is used.

In one embodiment of the present utility model, one end of the static contact 2 is provided with a threaded hole, and the other end of the static contact 2 is provided with a smooth arc-shaped groove for contacting with the wire, and the screw rod 1 passes through the threaded hole (with the threaded hole The moving contact 3 is arranged on the end of the threaded connection), so that the moving contact 3 can move relative to the static contact 2 by turning the screw mandrel 1 . In order to prevent the static contact 2 from rotating, the movable contact 3 is provided with a slot. The movable contact 3 utilizes a slot structure, and the movable contact 3 is slidably clamped on the static contact 2 through the slot.

Based on the above structural design, the static contact 2 of the grounding rod has a built-in thread buckle, and the screw is directly tightened to the 2 static contact when leaving the factory. operate. Through the above improvements, it is safer and more convenient for staff to operate and use the traditional structure of the grounding rod.

The embodiments of the invention have been presented for purposes of illustration and description, but are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and changes will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to better explain the principle and practical application of the invention, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for particular purposes.

Claims (5)

1. A safe and convenient ground rod, including a connecting rod, is characterized in that, One end of the connecting rod is provided with a screw rod (1), and a thread clamp is threaded on the screw rod; The wire gripper includes a static contact (2) and a moving contact (3) for clamping wires, the moving contact can abut against the static contact, between the static contact and the The opposite surface of the movable contact is provided with a concave smooth arc-shaped groove; An internal threaded hole (4) is preset on the static contact, and a fixing bolt for clamping the grounding wire is arranged on the internal threaded hole. 2. The safe and convenient ground rod according to claim 1, characterized in that, The static contact is provided with a threaded hole, and the screw rod is inserted into the threaded hole; A spring washer for applying pre-tightening force is arranged between the static contact and the screw rod. 3. The safe and portable ground rod according to claim 2, characterized in that, The moving contact is connected to the screw rod, and a spring washer for applying a pre-tightening force is arranged between the moving contact and the screw rod. 4. The safe and portable ground rod according to claim 3, characterized in that, The screw rod is set through the threaded hole; The end of the screw rod is provided with the moving contact; The movable contact is provided with a card slot, and the movable contact is slidably locked on the static contact through the card slot. 5. The safe and portable ground rod according to claim 4, characterized in that, The fixing bolts are internal helix bolts.