CN214703783U

CN214703783U - Electric shock prevention device for megameter test line

Info

Publication number: CN214703783U
Application number: CN202120782675.1U
Authority: CN
Inventors: 曹峰; 刘金涛; 曹媛
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-11-12
Anticipated expiration: 2031-04-16

Abstract

The utility model relates to a megger test wire anti-electric shock device, include the red test wire that links to each other with megger positive terminal and the black test wire that links to each other with megger negative terminal, red test wire includes wire A, wire A's both ends are connected with crocodile respectively and press from both sides A and U type piece interface A, it has the structure of opening circuit to establish ties on the wire A. The utility model discloses following beneficial effect has: megger test wire protection against electric shock device, through addding the structure that opens circuit, press the structure that opens circuit and change the break-make state, stop rocking the megger after opening circuit, terminal or alligator clip have not electrified, demolish alligator clip and terminal again, avoid taking electricity and tear the in-process hand and touch terminal or alligator clip electrically conductive position easily by mistake, lead to the electric shock, for reducing the injury that the maloperation caused the people.

Description

Electric shock prevention device for megameter test line

Technical Field

The utility model relates to a megger test wire protection against electric shock device belongs to megger and uses technical field.

Background

A megger, i.e., a megger, is mainly used to detect insulation resistance or high-value resistance (resistance of several tens of megohms or less, compared to resistance of a general value) of electrical equipment, household appliances, and cables. The megohmmeter can measure the resistance or resistance of all conductive, antistatic, and static dissipative materials. The equipment and products with poor insulation performance are detected in advance by using the megohmmeter, so that accidents such as electric shock casualties, equipment damage and the like can be effectively avoided.

By knowing the structure of the megger we know that the megger is actually a hand generator. In order to measure high-resistance resistors, the megohmmeter needs to output a high voltage, but does not need a large current. The maximum output current of the voltage of 2500V is only less than 1mA, and even less. Therefore, although the voltage output by the megger is high, the current output is small, and the danger to people is not enough to cause death. However, the safety is still required to be ensured when the device is used, and particularly when the device sweats more, the device still has a pricking feeling when contacting the measuring electrode.

According to analysis, the reason of electric shock is that the megger is stopped shaking after disconnecting the cable after the test is finished, so that the megger is prevented from being damaged due to reverse charging of the electrical equipment to the megger, the electric shock is caused due to the fact that a hand easily mistakenly contacts a wiring terminal or a conductive part of a crocodile clip in the electrified disconnecting process, and the device for preventing the megger test cable from electric shock is provided for reducing the damage to people due to misoperation.

SUMMERY OF THE UTILITY MODEL

According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: in order to solve one of the above problems, an electric shock protection device for a megger test wire is provided.

Megohmmeter test wire protection against electric shock device, its characterized in that: the black testing line that links to each other with megohmmeter negative terminal is drawn together to the red testing line that links to each other with megohmmeter positive terminal, the red testing line includes wire A, wire A's both ends are connected with alligator clip A and U type piece interface A respectively, it has the structure of opening circuit to establish ties on the wire A.

Preferably, the circuit breaking structure turns on and off the switch.

Preferably, the circuit breaking structure is a plug-in circuit breaking structure.

Preferably, the plug-in disconnection structure comprises a male plug and a female plug which are mutually butted.

Preferably, the black test line comprises a lead B, two ends of the lead B are respectively connected with an alligator clip B and a U-shaped piece interface B, and the U-shaped piece interfaces A, U and the U-shaped piece interfaces B are connected to the megameter.

Preferably, the red test line and the black test line have the same structure.

Preferably, the circuit breaking structure is a duplex switch, the black test line includes a wire B, two ends of the wire B are respectively connected with an alligator clip B and a U-shaped piece interface B, the U-shaped piece interface A, U type piece interface B is connected on a megohmmeter, a first contact and a sixth contact of the duplex switch are connected in series on the wire a, the first contact and the sixth contact are respectively connected with a rocker switch K1 and a rocker switch K2, a second contact and a fourth contact of the duplex switch are connected in series, a third contact and a fifth contact of the duplex switch are connected in series, a connecting wire is led out from a third contact of the duplex switch, and the other end of the connecting wire is connected to one end of the wire B close to the U-shaped piece interface B.

Compared with the prior art, the utility model discloses following beneficial effect has:

megger test wire protection against electric shock device, through addding the structure that opens circuit, press the structure that opens circuit and change the break-make state, stop rocking the megger after opening circuit, terminal or alligator clip have not electrified, demolish alligator clip and terminal again, avoid taking electricity and tear the in-process hand and touch terminal or alligator clip electrically conductive position easily by mistake, lead to the electric shock, for reducing the injury that the maloperation caused the people.

Megohmmeter test wire protection against electric shock device, during retest: the rocker switch K1 is toggled to enable the first contact to be connected with the second contact, the rocker switch K2 is toggled to enable the fourth contact to be connected with the sixth contact, the crocodile clip A and the crocodile clip B are clamped on the object to be measured, and the handle is rocked to complete measurement; after the test is finished, the rocker switch K2 is instantly pulled to connect the fifth contact with the sixth contact, the megger stops shaking after the megger discharges, so that one-time measurement can be finished, the rocker switch K2 is pulled to connect the fourth contact with the sixth contact, the handle is shaken, so that secondary measurement can be carried out, multiple times of measurement can be carried out in the same mode, and the measurement speed is improved.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second embodiment of the present invention;

fig. 3 is a schematic diagram of a circuit structure according to the first and second embodiments of the present invention;

fig. 4 is a schematic structural diagram of a fourth embodiment of the present invention;

fig. 5 is a schematic diagram of four circuit breaking structures according to the embodiment of the present invention;

in the figure: 1. red test line 1.1, wire A1.2, crocodile clip A1.3, U-shaped piece interface A1.4, open circuit structure 2, black test line 2.1, wire B3, megohmmeter 4 and connecting wire.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

the present invention is further illustrated by the following specific examples, which are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention.

Example 1

As shown in fig. 1 and 3, the megger test wire electric shock protection device comprises a red test wire 1 connected with a positive terminal of a megger 3 and a black test wire 2 connected with a negative terminal of the megger 3, wherein the red test wire 1 comprises a lead a1.1, two ends of the lead a1.1 are respectively connected with an alligator clip a1.2 and a U-shaped piece interface a1.3, and a circuit breaking structure 1.4 is connected in series on the lead a 1.1.

In this embodiment, the circuit breaking structure 1.4 is a on-off switch; the black test line 2 comprises a lead B, two ends of the lead B are respectively connected with an alligator clip B and a U-shaped piece interface B, and the U-shaped piece interfaces A, U and the U-shaped piece interfaces B are connected to the megameter 3.

Open circuit test of example 1: the crocodile clip A1.2 and the crocodile clip B are clipped together, the U-shaped piece interface A1.3 and the U-shaped piece interface B are connected to a positive terminal and a negative terminal of a megohmmeter, the circuit breaking structure 1.4 is pressed to enable the lead A1.1 to be in a circuit breaking state, the handle is shaken, and the pointer indicates infinity;

short circuit test of example 1: instantly pressing the circuit breaking structure 1.4 to enable the lead A1.1 to be in a connected state, and instantly short-circuiting the lead, wherein the pointer should return to the position of 0;

during testing: pressing the circuit breaking structure 1.4 to enable the lead A1.1 to be in a connection state, clamping the crocodile clip A1.2 and the crocodile clip B on an object to be measured, and shaking the handle to finish measurement;

after the test is finished, the circuit breaking structure 1.4 is pressed, the lead A1.1 is in circuit breaking, the megger stops shaking, the wiring terminal or the crocodile clip is uncharged, the crocodile clip A1.2 and the crocodile clip B are detached, and the damage to people caused by misoperation is reduced.

After the test is finished or the test is repeated, the tested object must be fully discharged to the ground or between the two electrodes, so as to ensure the safety of human bodies and instruments and improve the measurement accuracy.

Embodiment 2, referring to fig. 2 and 3, is different from the first embodiment in that the red test line 1 and the black test line 2 have the same structure.

Embodiment 3 is different from the first embodiment in that the circuit breaking structure 1.4 is a plug-in circuit breaking structure; the plug-in type circuit breaking structure comprises a male plug and a female plug which are mutually butted.

Embodiment 4, referring to fig. 4 and 5, the difference from the first embodiment is that the disconnection structure 1.4 is a duplex switch, the black test line 2 includes a conducting wire B, two ends of the conducting wire B are respectively connected with an alligator clip B and a U-shaped blade interface B, the U-shaped blade interface A, U type blade interface B is connected to the megohmmeter 3, a first contact and a sixth contact of the duplex switch are connected in series to the conducting wire a1.1, the first contact and the sixth contact are respectively connected with a rocker switch K1 and a rocker switch K2, a second contact and a fourth contact of the duplex switch are connected in series, a third contact and a fifth contact of the duplex switch are connected in series, a connection conducting wire is led out from the third contact of the duplex switch, and the other end of the connection conducting wire is connected to one end of the conducting wire B close to the U-shaped blade interface B.

Open circuit test of example 4: the crocodile clip A1.2 and the crocodile clip B are separated, the U-shaped piece interface A1.3 and the U-shaped piece interface B are connected to a positive terminal and a negative terminal of a megohmmeter, a rocker switch K1 is toggled to connect a first contact with a second contact, a rocker switch K2 is toggled to connect a fourth contact with a sixth contact, a handle is rocked, and a pointer indicates infinity;

short circuit test of example 4: the rocker switch K2 is instantly toggled to connect the fifth contact with the sixth contact, the lead A1.1 and the lead B2.1 are in a connected state through the connecting lead 4, and the pointer should return to the position of 0 after the short circuit occurs instantly.

When the test is repeated: the rocker switch K1 is toggled to enable the first contact to be connected with the second contact, the rocker switch K2 is toggled to enable the fourth contact to be connected with the sixth contact, the crocodile clip A1.2 and the crocodile clip B are clamped on the object to be measured, and the handle is rocked to finish measurement; after the test is finished, the rocker switch K2 is instantly pulled to connect the fifth contact with the sixth contact, the megger stops shaking after the megger discharges, so that one-time measurement can be finished, the rocker switch K2 is pulled to connect the fourth contact with the sixth contact, the handle is shaken, so that secondary measurement can be carried out, and multiple measurements can be carried out in the same way.

At the time of a single test: the rocker switch K1 is toggled to enable the first contact to be connected with the second contact, the rocker switch K2 is toggled to enable the fourth contact to be connected with the sixth contact, the crocodile clip A1.2 and the crocodile clip B are clamped on the object to be measured, and the handle is rocked to finish measurement; after the test is finished, the rocker switch K2 is instantly toggled to connect the fifth contact with the sixth contact, the megger stops rocking after discharging, one-time measurement can be finished, and the U-shaped piece interface A1.3 is taken down; toggle rocker switch K1, make first contact connect the third contact and connect, the crocodile presss from both sides A1.2, crocodile presss from both sides B and U type piece interface B takes off fully discharging between the two poles of the tested object, accomplishes the single measurement, all is uncharged at terminal or crocodile clamp, demolishs crocodile clamp or terminal again, reduces the injury that the maloperation caused the people.

The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a megger test wire protection against electric shock device which characterized in that: the black testing line that links to each other with megohmmeter negative terminal is drawn together to the red testing line that links to each other with megohmmeter positive terminal, the red testing line includes wire A, wire A's both ends are connected with alligator clip A and U type piece interface A respectively, it has the structure of opening circuit to establish ties on the wire A.

2. The megohmmeter test line electric shock protection device of claim 1, wherein: the circuit breaking structure is used for switching on and off the switch.

3. The megohmmeter test line electric shock protection device of claim 1, wherein: the circuit breaking structure is a plug-in circuit breaking structure.

4. The megohmmeter test line electric shock protection device of claim 3, wherein: the plug-in type circuit breaking structure comprises a male plug and a female plug which are mutually butted.

5. The megohmmeter test line electric shock protection device of any one of claims 1 to 4, wherein: the black test line comprises a lead B, two ends of the lead B are respectively connected with an alligator clip B and a U-shaped piece interface B, and the U-shaped piece interfaces A, U and the U-shaped piece interfaces B are connected to the megameter.

6. The megohmmeter test line electric shock protection device of any one of claims 1 to 4, wherein: the red test line and the black test line have the same structure.

7. The megohmmeter test line electric shock protection device of claim 1, wherein: the circuit breaking structure is a duplex switch, a black test line comprises a wire B, two ends of the wire B are respectively connected with an alligator clip B and a U-shaped sheet interface B, the U-shaped sheet interface A, U-shaped sheet interface B is connected on a megohmmeter, a first contact and a sixth contact of the duplex switch are connected on the wire A in series, a rocker switch K1 and a rocker switch K2 are connected on the first contact and the sixth contact respectively, a second contact and a fourth contact of the duplex switch are connected in series, a third contact and a fifth contact of the duplex switch are connected in series, a connecting wire is led out from a third contact of the duplex switch, and the other end of the connecting wire is connected at one end of the wire B close to the U-shaped sheet interface B.