RU2339134C1 - 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. Two locking bolts with smooth cylindrical nonthreaded ends are additionally introduced into device at that in the hammer body there is through slot with cylindrical wall concentric to hammer axis and width equal to metal rod diameter. In one of the side faces of hammer there are two through holes with inner thread up to vertical through slot in which holes locking bolts are screwed from the outside to lock rod in the hammer.

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

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Description

The present invention relates to the electric power industry, and in particular, 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 self-opening that have taken place, which is accompanied by injuries to service personnel when driving.

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 hammering rod element and a rod element serving as a guide for the hammer, each of the rod elements being removably connected in its end part 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 vertical hole for moving along the rod, which differs from the prototype device in that two locking bolts with smooth cylindrical threadless cones are additionally introduced into its structure Ami, while in the hammer body there is a vertical through groove with a cylindrical wall, the concentric axis of the hammer, and a width equal to the diameter of the metal rod, on one of the sides of the hammer there are two through holes with internal thread to a vertical through groove, in which from the outside locking bolts are screwed in to lock the rod in the hammer.

Comparative analysis with the prototype shows that the inventive device is characterized by the presence of additional elements with the appropriate design. Thus, the claimed device meets the criteria of the invention of "novelty."

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 hammer with two handles and a vertical hole for sliding along the rod is known. However, due to the fact that two locking bolts with smooth cylindrical threaded ends are additionally introduced into its structure, and a vertical through groove with a cylindrical wall, the concentric axis of the hammer, and a width equal to the diameter of the metal rod is cut in the hammer body, there are two sides of the hammer through holes with internal thread to a vertical through groove, into which the locking bolts are screwed on the outside to lock the rod in the hammer, new properties of the claimed device appear yuchayuschiesya compound in the absence of the loop of its components and simplifying 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;

figure 2 - hammer 3 with two handles 4, a vertical through groove with a cylindrical wall, the concentric axis of the hammer, and a width equal to the diameter of the metal rod, and two through side holes with internal thread on one of its sides to a vertical through groove;

figure 3-one of the locking bolts 5 with a smooth cylindrical threadless end;

figure 4 - the whole structure of the proposed device for grounding Assembly, i.e. locking bolts 5 with smooth cylindrical threadless ends are screwed into the lateral openings of the hammer 3 from the outside, while the inter-shoulder part of the metal rod 1 is located on the vertical axis of the hammer 3.

The heads of the locking bolts 5 can be made in the form of just a turnkey hexagon, or in the form of a turnkey hexagon with slots for a screwdriver, as shown in Fig. 3, or in the form of a lamb or other end for wrapping and turning them out manually.

According to the drawings, in order to bring the grounding device into working condition, it is necessary to unscrew the locking bolts 5 from the hammer 3 until their smooth cylindrical threadless ends hide in the hammer body from the through vertical groove, and then insert the inter-shoulder part of the metal into the center of the hammer 3 rod 1 and tighten the locking bolts 5, thereby fixing the reliable location of the metal rod 1 inside the hammer 3.

When the hammer 3 slides along the rod 1 and the hammer 3 is struck against the lower or upper flange 2, the rod 1 will either be immersed in the soil or removed from it, respectively. Bolts 5, wrapped in the body of the hammer 3, will ensure reliable retention in its central part of the metal rod 1.

At the end of the process of driving the rod into the ground or removing it from the soil, unscrewing the locking bolts 5, the metal rod 1 is removed from the groove of the hammer 3. The hammer 3, disconnected from this metal rod 1, can be used in the same way to drive another one into the ground or excavation rod 1.

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 - for this it is enough to screw or unscrew the locking bolts from the hammer body with smooth cylindrical threadless ends, respectively introducing into the groove or withdrawing 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, is 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 cost of production and improve the conditions for using the device 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. A 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. The lock for driving grounding conductors into the ground, MKI H01R 4/66, V.A. Sizov, V.I. Titov and others. 1983, BI No. 12.

5. A.S. USSR No. 991535. Grounding device, 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 BV 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, one of the collars being located in the upper part of the rod, and a hammer with two handles, characterized in that the composition additionally introduced two locking bolts with smooth cylindrical threadless ends, in the hammer body there is a vertical through groove with a cylindrical wall, the concentric axis of the hammer, and a width equal to the diameter of the metal of the rod, while on one of the sides of the hammer there are two through holes with an internal thread up to a vertical groove into which locking bolts with smooth cylindrical threadless ends are screwed on the outside.

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