RU2342750C1 - Grounding device - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: invention is attributed to electrical energy industry, specifically to grounding devices for movable electric installations intended for maintenance personnel protection against electrical shock. The device comprises metal sharp rod with clamp and two shoulders spaced from each other at distance of hammer stroke where one of the shoulders is located at rod upper part, and hammer for diving with two handles and central vertical hole for moving along the rod. The purpose of the invention is to eliminate the presence of grounding device elements loop joint and design simplification. Stated purpose is achieved due to the fact that in the hammer body throughout its height there is sloping groove with width equal to metal rod diameter and depth up to vertical central plane of hammer, with subsequent groove turning around axis which is perpendicular to vertical central plane of hammer up to coincidence with vertical axis of the hammer.

EFFECT: elimination of loop joint of grounding device elements and design simplification.

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Description

The present invention relates to the electric power industry, namely, to the grounding devices of mobile electrical installations designed to protect service personnel from electric shock.

A device for grounding a moving object [1] is known, comprising a pointed metal rod connected to the object body with a flexible cable and a load moving along the rod in the axial direction, while performing vertical installation of the rod at the initial time. The disadvantage of this device is that it does not provide sufficient reliability of the grounding of the object, since the rod is inserted into the ground by the force of a person’s hand.

A device for driving an earthing switch into the soil [2] is known, made in the form of a welded washer on the surface of the earthing switch and a nut screwed on top.

The disadvantages of this device are the insignificant mechanical strength of the structure in the form of a washer welded to the pin, as well as the presence of a removable element in the form of a nut.

Known rod grounding conductors for mobile electrical installations [3], which are a rod of one length or another, a clamp for connecting a contact wire to a rod, and a device for driving the rod into the ground and removing it from the ground, consisting of a detachable lock with a locking handle and a hammer transmitting the shock load through the lock on the rod. A distinctive feature of the hammer is the presence of two handles and a vertical hole, through which the hammer is put on the rod for subsequent driving of the rod into the ground or extraction from the ground.

One of the disadvantages of this device is the presence of a very complex construction, and therefore in the manufacture of a split lock with a locking handle. In addition, this lock is characterized by insufficient reliability, expressed by the cases of its self-opening, which is accompanied by injuries to staff when using this device.

Another disadvantage of this device is the presence of removable elements - a clamp and a detachable lock, requiring in the field increased attention to them in order to ensure their safety.

Known lock for driving grounding in the ground [4], which differs in comparison with [3] greater reliability. However, it is characterized by an even more complex design.

A device for grounding [5] is known, comprising a lock, a hammer, and at least two rod elements — a driven and a guide. The lock is made in the form of a sleeve with end holes located along the longitudinal axis of the sleeve and designed to be placed in them with a clearance of a hammer element of the rod, and a rod element serving as a guide for the hammer, each of the rod elements being made with the possibility of detachable connection in its end parts with lock sleeve by means of a hairpin.

The main disadvantage of this device is the presence of a removable element - a lock in the form of a sleeve with a pin, which, when the grounding device is in working condition, must be located outside the ground electrode, which can be easily lost.

Closest to the invention, the device adopted for the prototype is a grounding device [6], containing a pointed metal rod with a clamp and two shoulders, spaced apart from each other by the distance of the hammer, with one of the shoulders located in the upper part of the rod, and a hammer with two handles and a vertical axial hole for sliding along the shaft. A distinctive feature of the prototype device is that its hammer is made in the form of two halves with a cut plane along the axis of the vertical hole, connected to each other through a loop connection and a latch.

The presence of two shoulders on a metal rod, as well as the design of the hammer in the form of two halves with a loop connection to each other, provided a positive effect - the absence of removable elements in the grounding device. However, as one of the disadvantages of the prototype device, it should be noted that the use of a loop connection is characterized by a significant complexity of its design to achieve the necessary mechanical strength and causes the adoption of increased precautions to prevent personal injury during field work.

The aim of the invention is the elimination of the loop connection in the device for grounding and simplification of its design.

This goal is achieved due to the fact that the proposed device for grounding, containing a pointed metal rod with a clamp for connecting the contact wire and two flanges, spaced apart from each other by the distance of the hammer, with one of the flanges located in the upper part of the rod, and a hammer having two handles and a central vertical hole for moving along the rod, characterized in that in the hammer body over its entire height there is an inclined groove with a width equal to the diameter of the metal rod, and depth to the vertical center plane of the hammer, followed by turning around the slot axis perpendicular to the vertical center plane of the hammer to its alignment with the vertical axis of the hammer.

Comparative analysis with the prototype shows that the claimed device is characterized by the presence of structural differences. Thus, the claimed device meets the criteria of the invention of "novelty."

A comparison of the claimed device with other similar technical solutions shows that the creation of such devices in the form of a pointed metal rod with two flanges and a clamp for connecting the contact wire, and a hammer with two handles and a vertical hole for sliding along the rod is known. However, due to the fact that the hammer’s body has an inclined groove to its entire height equal to the diameter of the metal rod and the depth to the vertical central plane of the hammer, followed by rotation of the groove about an axis perpendicular to the vertical central plane of the hammer until it aligns with the vertical axis of the hammer , new properties of the claimed device appear, consisting in the absence of a loop connection of its elements and the simplification of its design.

This allows us to conclude that the claimed technical solution meets the criterion of "significant differences".

Figure 1 shows the rod 1 with two shoulders 2 and a clamp 3 for connecting the contact wire;

figure 2 - hammer 4 with two handles 5 and an inclined groove to its entire height, a width equal to the diameter of the metal rod, and depth to the vertical central plane of the hammer, with subsequent rotation of the groove around an axis perpendicular to the vertical central plane of the hammer, until it is aligned with a vertical axis of the hammer;

figure 3 - the whole structure of the proposed device for grounding Assembly, i.e. in the central part of the hammer 3 is the inter-bourt part of the metal rod 1.

According to the drawings, in order to bring the grounding device into working condition, it is necessary to insert the rod 1 in its inter-bead section into the inclined groove of the hammer 4 until it stops, and then align the hammer by aligning its central axis with the axis of the rod 1. As a result of these actions, the rod 1 with its inter-bead part will be fixed in the center of the hammer 4.

When the hammer 4 slides along the rod 1 and the hammer 4 is struck against the lower or upper flange 2, the rod 1, respectively, will either be immersed in or removed from the ground. The inability to remove the rod from the body of the hammer without first tilting the hammer provides reliable retention in the Central part of the hammer 4 of the metal rod 1.

At the end of the process of driving the rod into the ground or removing it from the soil, tilting the hammer 4, the metal rod 1 is removed from its groove. The hammer 4, disconnected from this metal rod 1, can be used in a similar way to drive another rod 1 into the ground or excavate it from the ground .

As follows from the above description, the indisputable advantage of the proposed device for grounding is that it is very easy to connect for work and disconnect at the end of the hammer with a metal rod - all you need to do is tilt the hammer, and then insert the metal into the groove accordingly the rod and align it, or withdraw from it a metal rod. At the same time, a very reliable connection of the hammer with a metal rod is ensured in working condition.

From the above description of the design and use of the proposed device for grounding, it can be seen that there is no loop connection of its elements and its design is very simple.

Therefore, we can conclude that the goal set for the proposed invention, the elimination of the presence of a loop connection of the elements of the device for grounding and simplification of design, has been achieved.

The proposed device can be widely used as grounding devices for mobile power plants in order to protect service personnel from electric shock.

The technical and economic effect due to the use of the proposed device is to reduce the number of parts used and the complexity of its manufacture, and to improve the conditions for using devices for grounding mobile electrical installations in the field, and therefore to increase the combat readiness of the corresponding power supply systems.

The quantitative value of the expected technical and economic effect from the use of the proposed device depends primarily on the scale and conditions of its use - its determination is possible only after the implementation of the proposed device at specific facilities.

Information sources

1. A.S. USSR No. 458068, Device for grounding a moving object, MKI H01R 3/06, A.V. Mikhalkov and V.V. Zharov. 1975, BI No. 3.

2. US patent No. 2270325, CL. 174-7, 1942

3. GOST 16556-81. Earthing switches for mobile electrical installations. General technical requirements.

4. A.S. USSR No. 1008826, Lock for driving grounding conductors into the ground, MKI N01R 4/66, V.A. Sizov, V.I. Titov and others. 1983, BI No. 12.

5. A.S. USSR No. 991535, Device for grounding, Н01R 4/66, I.I. Cherny and P.A. Shchegolev. 1983, BI No. 3.

6. RF patent No. 2277275, Grounding device, H01R 4/66, VV Bartosh and VV Volkodaev. 2006, BI No. 15 (prototype).

Claims (1)

A grounding device containing a pointed metal rod with a clamp for connecting the contact wire and two collars remote from each other by the distance of the hammer stroke, one of the collars being located in the upper part of the rod, and a hammer having two handles, characterized in that The hammer body has an inclined groove to its entire height with a width equal to the diameter of the metal rod and a depth to the vertical central plane of the hammer, with subsequent rotation of the groove around an axis perpendicular to the vertical central oh hammer plane to align it with the vertical axis of the hammer.

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