CN208127443U - Test earthing or grounding means and earth resistance equipment - Google Patents

Abstract

The utility model provides a grounding device for testing and grounding resistance testing equipment, and relates to the technical field of electric power equipment. The grounding device for testing provided by the utility model includes: a ground rod, a ground wire, a wire connection mechanism and a wire retractable mechanism; the wire connection mechanism is used to detachably connect one end of the ground wire to the ground rod; the wire retractable mechanism includes a winding The wire reel is rotatably connected to the ground rod; the wire reel can be rotated to wind the ground wire onto the wire reel. Through the grounding device for testing provided by the utility model, the technical problem of inconvenient grounding of testing equipment existing in the prior art is alleviated.

Description

Grounding device for testing and grounding resistance testing equipment

technical field

The utility model relates to the technical field of electric equipment, in particular to a grounding device for testing and grounding resistance testing equipment.

Background technique

Grounding is a protective measure for electric or electronic equipment, and it is also an effective means to protect personal safety. When the phase wire and the equipment shell are accidentally touched, the equipment shell will generate dangerous voltage, and the resulting current will It will go to the earth through the protective ground wire, thus playing the role of personal safety protection. Grounding resistance is an important parameter used to measure whether the grounding state is good. It is the resistance encountered when the current flows from the grounding device to the ground and then flows to another grounding body or spreads far away. It includes the grounding wire and the grounding body itself. Resistance, the contact resistance between the grounding body and the resistance of the earth, and the resistance of the earth between the two grounding bodies or the earth resistance from the grounding body to infinity. The size of the grounding resistance directly reflects the good degree of contact between the electrical device and the earth.

There are many factors affecting the grounding resistance: the size, shape, quantity, buried depth, surrounding geographical environment, soil moisture and texture of the grounding electrode. In order to ensure good grounding of electrical equipment, it is generally necessary to use grounding resistance test equipment to test the grounding resistance of electrical equipment, and adjust the grounding measures according to the test structure so that the electrical equipment meets the grounding requirements.

When using test equipment to test the grounding resistance of electrical equipment, the ground terminal of the test equipment needs to be grounded. The testing of electrical equipment is often carried out outdoors, and the location of the testing equipment is not fixed, and it is necessary to carry the testing equipment to move among multiple places, which leads to the technical problem of inconvenient grounding of the testing equipment in the prior art.

The information disclosed in the background technology section is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art known to those skilled in the art.

Utility model content

The purpose of the utility model is to provide a grounding device for testing and grounding resistance testing equipment, so as to alleviate the technical problem of inconvenient grounding of the testing equipment existing in the prior art.

The first aspect of the utility model provides a grounding device for testing. The grounding device for testing provided by the utility model includes: a grounding rod, a grounding wire, a wire connecting mechanism and a wire retracting mechanism; the wire connecting mechanism is used to connect one end of the grounding wire It is detachably connected to the grounding rod; the wire retracting mechanism includes a winding disk, which is rotatably connected to the grounding rod; the grounding wire can be wound onto the winding disk by rotating the winding disk.

Further, the wire retracting mechanism includes a rotating handle, which is rotationally connected to the grounding rod; and the wire reel is connected to one end of the rotating handle.

Further, a connecting hollow pipe is connected to the ground rod; the rotating handle passes through the connecting hollow pipe, and is connected with the connecting hollow pipe through a bearing.

Further, the wire retracting mechanism includes a wire connecting hook, and the wire connecting hook is fixed on the winding reel.

Further, the wire connection mechanism includes an elastic split ring, a conductive post and a cam handle, one end of the grounding wire is connected to the conductive post, and the elastic split ring can be sleeved on the ground rod; the conductive post passes through both ends of the open side of the elastic split ring, The first end of the conductive column abuts against the outer side of the first end of the elastic split ring; the cam handle is connected to the second end of the conductive post by rotation, and the cam handle abuts against the outer side of the second end of the elastic split ring; turning the cam handle can push the elastic The two ends of the open side of the split ring move relatively close to each other, and the elastic split ring clamps the ground rod.

Further, the wire connection mechanism includes an arc spacer, which is arranged between the outside of the second end of the elastic split ring and the cam handle, and the arc surface of the arc spacer matches the cam surface of the cam handle.

Further, the grounding rod includes a connecting rod and a grounding rod, one end of the grounding rod is connected to the connecting rod, and the other end is provided with a sharp part.

The second aspect of the utility model provides a kind of ground resistance test equipment, the ground resistance test equipment provided by the utility model comprises: a ground resistance shaker meter and the above-mentioned test grounding device; one end of the ground wire in the test ground device and the ground resistance Megger ground connection.

The utility model provides a grounding device for testing and grounding resistance testing equipment, which relate to the technical field of electric power equipment. The grounding device for testing provided by the utility model includes: a grounding rod, a grounding wire, a wire connecting mechanism and a wire retracting mechanism; the wire connecting mechanism is used to detachably connect one end of the grounding wire to the grounding rod; the wire retracting mechanism includes winding The wire reel is rotatably connected to the ground rod; the wire reel can be rotated to wind the ground wire onto the wire reel. When using the test equipment that needs to be grounded for testing operations, connect one end of the ground wire to the ground terminal of the test equipment, and the other end is connected to the ground rod through the wire connection mechanism; the ground rod is inserted into the earth, thereby realizing the ground terminal of the test equipment connected to the earth.

During the test process, it is sometimes difficult to find a suitable place for the insertion of the grounding rod near the placement of the testing equipment. The grounding device for testing provided by the utility model disconnects the grounding wire from the grounding rod and can be rotated by the relative grounding rod. The winding reel is used to retract and release the grounding wire. In this way, on the one hand, it is convenient to insert the grounding rod into the proper position of the earth; on the other hand, it is convenient to wind the grounding wire on the winding reel, which can avoid the inconvenient test operation caused by the knotting and messy placement of the grounding wire, and also It can protect the grounding wire and reduce the damage of the grounding wire. In this way, the technical problem of inconvenient grounding of testing equipment existing in the prior art is alleviated through the grounding device for testing provided by the utility model.

The ground resistance testing equipment described above has the same advantages as the above-mentioned testing grounding device over the prior art, and will not be repeated here.

In order to make the above purpose, features and advantages of the present utility model more obvious and understandable, the preferred embodiments of the present utility model are specifically cited below, together with the attached drawings, for a detailed description as follows.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can obtain other drawings according to these drawings without any creative work.

Fig. 1 is the structural representation of the test grounding device that the utility model embodiment provides;

Fig. 2 is a structural schematic diagram of the wire retractable mechanism of the grounding device for testing provided by the embodiment of the present invention;

3 is a schematic structural view of the first state of the wire connection mechanism of the grounding device for testing provided by the embodiment of the present invention;

Fig. 4 is a schematic structural view of the second state of the wire connection mechanism of the grounding device for testing provided by the embodiment of the present invention.

Icons: 011- ground rod; 012- connecting rod; 013- connecting hollow pipe; 02- grounding wire; 031- winding reel; 032- turning handle; 033- wire connecting hook; Split ring; 042-cam handle; 043-conductive column; 044-boss column; 045-arc spacer.

Detailed ways

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, the terms "first", "second", and "third" 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 clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The first aspect of the utility model provides a grounding device for testing. The grounding device for testing provided by the utility model includes: a grounding rod, a grounding wire 02, a wire connection mechanism 04, and a wire retractable mechanism; the wire connection mechanism 04 is used to ground One end of the wire 02 is detachably connected to the grounding rod; the wire retracting mechanism includes a winding reel 031, which is rotatably connected to the grounding rod; rotating the reel 031 can wind the grounding wire 02 to the reel 031 superior.

Specifically, when using test equipment that needs to be grounded for testing operations, one end of the ground wire 02 is connected to the ground terminal of the test equipment, and the other end is connected to the ground rod through the wire connection mechanism 04; the ground rod is inserted into the ground, thereby realizing The ground terminal of the test equipment is connected to earth.

During testing, it is sometimes difficult to find a suitable location for the ground rod to be inserted near the location of the test equipment. The grounding device for testing provided by the utility model can disconnect the grounding wire 02 from the grounding rod, and the grounding wire 02 can be retracted by rotating the reel 031 relative to the grounding rod. In this way, on the one hand, it is convenient to insert the grounding rod into a suitable position on the earth; on the other hand, it is convenient to wind the grounding wire 02 onto the winding reel 031, which can avoid affecting the test operation due to the knotting and messy placement of the grounding wire 02, It can also protect the grounding wire 02 and reduce damage to the grounding wire 02 .

In some embodiments, the side wall of the winding reel 031 is provided with a groove around the rotation axis, and the groove is used to accommodate the grounding wire 02 so that the grounding wire 02 can be wound more firmly on the winding reel 031 to avoid grounding. The wire 02 is separated from the winding reel 031 and spread out.

Further, the grounding rod includes a connecting rod 012 and a grounding rod 011, one end of the grounding rod 011 is connected to the connecting rod 012, and the other end is provided with a sharp portion.

Specifically, the grounding rod 011 is welded to the middle end of the connecting rod 012, and the connecting rod 012 and the grounding rod 011 are arranged perpendicular to each other. In this way, it is convenient to apply force along the axis direction of the ground rod 011 to the ground rod 011 through the connecting rod 012, so as to insert the ground rod 011 into the ground.

Further, the wire retracting mechanism includes a rotating handle 032 , which is rotationally connected to the ground rod 011 ; and the winding reel 031 is connected to one end of the rotating handle 032 .

Specifically, referring to FIG. 1 and FIG. 2 , the winding reel 031 is rotatably connected to the ground rod 011 through the rotating handle 032 . The rotating handle 032 supports the winding reel 031 and is convenient for the operator to drive the winding reel 031 to rotate.

Further, a connecting hollow pipe 013 is connected to the ground rod 011; the turning handle 032 passes through the connecting hollow pipe 013, and is connected with the connecting hollow pipe 013 through a bearing.

Specifically, the connecting hollow pipe 013 is welded to the ground rod 011; the turning handle 032 is connected with the connecting hollow pipe 013 through a deep groove ball bearing, and the outer ring of the deep groove ball bearing is connected with the inner wall of the connecting hollow pipe 013, and the turning handle 032 is connected from the inside Pass through the ring, and the inner ring is interference fit with the turning handle 032.

Further, the wire retracting mechanism includes a wire connecting hook 033 , and the wire connecting hook 033 is fixed on the winding reel 031 .

Specifically, please refer to FIG. 2 , the wire connecting hook 033 is welded on the outside of the winding reel 031 . When retracting the grounding wire 02, one end of the grounding wire 02 connected to the grounding rod can be disconnected from the grounding rod, and wound on the wire connecting hook 033, which is convenient for rotating the winding reel 031, so that the other end of the grounding wire 02 can be wound up. Go around on the reel 031.

In some embodiments, the wire connection hook 033 is connected to the outer surface of the winding reel 031 at a position close to the rotation axis, so as to reduce the swing of the end of the grounding wire 02 connected to the ground rod with the reel 031 when the reel 031 is rotated. .

Further, the wire connection mechanism 04 includes an elastic split ring 041, a conductive post 043 and a cam handle 042. One end of the grounding wire 02 is connected to the conductive post 043, and the elastic split ring 041 can be sleeved on the connecting rod 012; the conductive post 043 passes through the elastic The two ends of the opening side of the split ring 041, the first end of the conductive post 043 abuts against the outside of the first end of the elastic split ring 041; the cam handle 042 is connected to the second end of the conductive post 043 in rotation, and the cam handle 042 and the elastic opening The outer side of the second end of the ring 041 abuts; turning the cam handle 042 can push the two ends of the opening side of the elastic split ring 041 to move relatively close, and the elastic split ring 041 clamps the connecting rod 012 .

Specifically, referring to FIG. 1 , FIG. 3 and FIG. 4 , the conductive post 043 and the cam handle 042 are both made of conductive material; the elastic split ring 041 is made of bent copper sheet. The first end and the second end of the elastic split ring 041 are provided with a through hole, and the conductive post 043 passes through the first end and the second end of the elastic split ring 041 through the through hole, and the conductive post 043 can be placed in the through hole Sliding; the first end of the conductive post 043 is connected with a protruding post 044 , and the protruding post 044 abuts against the outside of the first end of the elastic split ring 041 , and the ground wire 02 is connected to the protruding post 044 . The rotation axis of the cam handle 042 relative to the conductive post 043 is perpendicular to the longitudinal axis of the conductive post 043 .

The elastic split ring 041 is clamped outside the connecting rod 012 by the cam handle 042 and is in good contact with the connecting rod 012 . The ground wire 02 communicates with the connecting rod 012 through the conductive post 043 and the elastic split ring 041 .

Further, the wire connection mechanism 04 includes an arc pad 045, which is arranged between the outer side of the second end of the elastic split ring 041 and the cam handle 042, and the arc surface of the arc pad 045 is connected to the cam handle 042. The cam faces match.

Specifically, please refer to FIG. 3 and FIG. 4 , the side of the arc spacer 045 away from the arc surface abuts against the second end of the elastic split ring 041; the arc spacer 045 is provided with a through hole, and the conductive column 043 passes through the through hole. Rotating the cam handle 042 can pull the conductive column 043 to move relative to the arc pad 045 in the through hole.

The second aspect of the utility model provides a grounding resistance testing equipment, the utility model provides the grounding resistance testing equipment comprising: grounding resistance shaker meter and the above-mentioned testing grounding device; one end of the grounding wire 02 in the testing grounding Connect the ground terminal of the resistance shaker meter.

Specifically, the grounding end of the grounding resistance meter is grounded through the grounding device for testing, and the testing end is connected to the device under test through wires to perform the grounding resistance test.

Finally, it should be noted that each embodiment in this specification is described in a progressive manner, each embodiment focuses on the differences from other embodiments, and the same and similar parts of each embodiment refer to each other That is to say; the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it still The technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (8)

1. A grounding device for testing, comprising: a grounding rod, a grounding wire, a wire connection mechanism and a wire retractable mechanism; The wire connection mechanism is used to detachably connect one end of the ground wire to the ground rod; The wire retracting mechanism includes a wire reel, which is rotatably connected to the ground rod; rotating the wire reel can wind the ground wire onto the wire reel. 2. The grounding device for testing according to claim 1, wherein the lead retracting mechanism includes a rotating handle, and the rotating handle is rotatably connected to the ground rod; the winding reel is connected to the rotating end of the handle. 3. The grounding device for testing according to claim 2, wherein a connecting hollow pipe is connected to the ground rod; the turning handle passes through the connecting hollow pipe, and is connected with the connecting hollow pipe through a bearing connect. 4 . The grounding device for testing according to claim 1 , wherein the wire retracting mechanism comprises a wire connecting hook, and the wire connecting hook is fixed to the winding reel. 5 . 5. The grounding device for testing according to claim 1, wherein the wire connecting mechanism comprises an elastic split ring, a conductive post and a cam handle, one end of the grounding wire is connected to the conductive post, and the elastic The split ring can be sleeved on the ground rod; The conductive column passes through both ends of the opening side of the elastic split ring, and the first end of the conductive column abuts against the outside of the first end of the elastic split ring; the cam handle is rotatably connected to the conductive The second end of the post, the cam handle abuts against the outside of the second end of the elastic split ring; turning the cam handle can push the two ends of the opening side of the elastic split ring to move relatively close, and the elastic split ring The ring clamps the ground rod. 6. The grounding device for testing according to claim 5, wherein the wire connecting mechanism comprises an arc spacer, and the arc spacer is arranged on the outer side of the second end of the elastic split ring and the cam Between the handles, the arc surface of the arc spacer matches the cam surface of the cam handle. 7. The grounding device for testing according to claim 1, wherein the grounding rod includes a connecting rod and a grounding rod, one end of the grounding rod is connected to the connecting rod, and the other end is provided with a sharp department. 8. A grounding resistance testing device, comprising: a grounding resistance meter and the grounding device for testing as claimed in any one of claims 1-7; One end of the ground wire in the test grounding device is connected to the ground terminal of the ground resistance meter.