Instrument equipment shell grounding detection device

Abstract

The utility model discloses an instrument equipment shell grounding detection device which comprises a detection shell, a metal sheet is fixedly installed on the surface of one side of the detection shell, an indicating lamp is fixedly installed on the upper surface of the detection shell, and a buzzer is fixedly installed on the upper surface of the detection shell and located on one side of the indicating lamp. A three-position change-over switch is fixedly installed on the upper surface of the detection shell and located on the other side of the indicating lamp, an insulation resistance measuring loop mechanism is fixedly installed on the front surface of the detection shell, and a spiral wire is connected to the surface of one side of the detection shell in a penetrating mode. The grounding detection device for the instrument equipment shell can quickly detect the grounding state of the instrument equipment shell and judge whether the instrument equipment shell is in poor contact or open circuit or not, so that safety risks are avoided, and the grounding detection device is convenient to use, simple to operate and high in practicability. The size is small, and carrying and using are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment detection devices, in particular to a grounding detection device for an instrument and equipment shell. Background Art

[0002] Good grounding of the casing of instruments and equipment is particularly important for users. However, during long-term use, the casing of the instrument and equipment may have poor contact or be broken due to vibration, rust or other reasons, which will create safety risks. It is necessary to regularly perform grounding detection on the casing of the instrument and equipment. Therefore, in order to better protect electrical equipment, we propose a grounding detection device for the casing of the instrument and equipment. Utility Model Content

[0003] The main purpose of the utility model is to provide a grounding detection device for the casing of an instrument and equipment, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A grounding detection device for the casing of an instrument and equipment includes a detection casing, a metal sheet is fixedly installed on one side surface of the detection casing, an indicator light is fixedly installed on the upper surface of the detection casing, a buzzer is fixedly installed on the upper surface of the detection casing on one side of the indicator light, a three-position changeover switch is fixedly installed on the upper surface of the detection casing on the other side of the indicator light, an insulation resistance measurement circuit mechanism is fixedly installed on the front surface of the detection casing, a spiral wire is inserted and connected to the one side surface of the detection casing, and the other end of the spiral wire is connected to an electrical clamp.

[0006] Furthermore, the negative electrode of the battery is electrically connected to the metal sheet through a wire, and a battery compartment is provided on one side of the detection housing below the spiral wire.

[0007] Furthermore, the positive electrode of the battery is electrically connected to the indicator light, the buzzer and one end of the insulation resistance measurement circuit mechanism through wires.

[0008] Furthermore, the other ends of the insulation resistance measurement circuit mechanism, the buzzer and the indicator light are electrically connected to the three-position switch through wires, and the other ends of the buzzer and the indicator light are electrically connected to the same switch position on the three-position switch, and the other end of the insulation resistance measurement circuit mechanism is electrically connected to the second switch position on the three-position switch.

[0009] Furthermore, the buzzer and the indicator light are electrically connected in parallel.

[0010] Furthermore, when the three-position conversion switch is rotated to the third switch position, it is in a circuit-off shutdown state, and the spiral wire passes through the detection housing and is electrically connected to the circuit switching piece of the three-position conversion switch.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] In the utility model, the instrument and equipment casing grounding detection device can quickly detect the grounding status of the instrument and equipment casing, and judge whether the instrument and equipment casing has poor contact or is broken, thereby avoiding safety risks. In addition, the device is easy to use, simple to operate, small in size, and easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a grounding detection device for an instrument and equipment casing according to the present invention;

[0014] Figure 2 The utility model is a circuit principle diagram of a grounding detection device for an instrument and equipment casing.

[0015] In the figure: 1. Detection housing; 101. Battery compartment; 2. Metal sheet; 3. Buzzer; 4. Indicator light; 5. Three-position switch; 6. Insulation resistance measurement circuit mechanism; 7. Battery; 8. Spiral wire; 9. Electrical connection clamp. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0017] like Figure 1-2 As shown, a grounding detection device for the casing of an instrument and equipment comprises a detection casing 1, a metal sheet 2 is fixedly mounted on one side surface of the detection casing 1, an indicator light 4 is fixedly mounted on the upper surface of the detection casing 1, a buzzer 3 is fixedly mounted on the upper surface of the detection casing 1 on one side of the indicator light 4, a three-position changeover switch 5 is fixedly mounted on the upper surface of the detection casing 1 on the other side of the indicator light 4, an insulation resistance measurement circuit mechanism 6 is fixedly mounted on the front surface of the detection casing 1, a spiral wire 8 is inserted and connected to one side surface of the detection casing 1, and the other end of the spiral wire 8 is connected to an electrical clamp 9, wherein the spiral wire 8 is connected to the indicator light 4 and the buzzer 3 connected in parallel through the three-position changeover switch 5, and the casing grounding detection gear is turned on; when the spiral wire 8 is connected to the insulation resistance measurement circuit mechanism 6 through the three-position changeover switch 5, the insulation resistance measurement gear is turned on; when the three-position changeover switch 5 is rotated to a gear between the above two gears, it is in a circuit-breaking stop detection gear; in addition, the spiral wire 8 is spring-shaped, which is convenient for stretching as needed and automatically shrinking after use, eliminating the trouble of wiring;

[0018] The negative pole of the battery 7 is electrically connected to the metal sheet 2 through a wire, and a battery compartment 101 is provided on one side of the detection housing 1 below the spiral wire 8; the positive pole of the battery 7 is electrically connected to the indicator light 4, the buzzer 3 and one end of the insulation resistance measurement circuit mechanism 6 through a wire respectively; the other ends of the insulation resistance measurement circuit mechanism 6, the buzzer 3 and the indicator light 4 are all electrically connected to the three-position switch 5 through a wire, and the other ends of the buzzer 3 and the indicator light 4 are electrically connected to the same switch position on the three-position switch 5, and the other end of the insulation resistance measurement circuit mechanism 6 is electrically connected to the second switch position on the three-position switch 5; the buzzer 3 and the indicator light 4 are electrically connected in parallel; when the three-position switch 5 is rotated to the third switch position, it is in an open circuit shutdown state, and the spiral wire 8 penetrates the detection housing 1 and is electrically connected to the circuit switching piece of the three-position switch 5.

[0019] It should be noted that the present invention is a grounding detection device for the casing of an instrument and equipment. When in use, the metal sheet 2 of the grounding detection device is brought into contact with the casing of the instrument and equipment. When the casing is detected to be grounded, the spiral wire 8 is clamped to the grounding terminal of the three-plug power cord of the instrument and equipment through the power clamp 9. If the casing is reliably grounded, the indicator light 4 will light up and the buzzer 3 will sound an alarm. Otherwise, the indicator light 4 will not light up and the buzzer 3 will not sound an alarm. When the insulation resistance measurement loop mechanism 6 is connected, it can be used to detect the insulation resistance. During the detection, the spiral wire 8 is clamped to the neutral wire terminal or the live wire terminal of the three-plug power cord of the instrument and equipment through the power clamp 9. After connection, the insulation resistance value can be measured, and the insulation resistance value is read on the display of the insulation resistance measurement loop mechanism 6.

[0020] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting grounding of an instrument housing, characterized in that: The invention comprises a detection shell (1), a metal sheet (2) is fixedly mounted on one side surface of the detection shell (1), an indicator light (4) is fixedly mounted on the upper surface of the detection shell (1), a buzzer (3) is fixedly mounted on one side of the upper surface of the detection shell (1) located on the indicator light (4), a three-position changeover switch (5) is fixedly mounted on the upper surface of the detection shell (1) located on the other side of the indicator light (4), an insulation resistance measurement circuit mechanism (6) is fixedly mounted on the front surface of the detection shell (1), a spiral wire (8) is inserted and connected to one side surface of the detection shell (1), and the other end of the spiral wire (8) is connected to an electric clamp (9).

2. The device for detecting grounding of an instrument housing according to claim 1, wherein: The negative electrode of the battery (7) is electrically connected to the metal sheet (2) via a wire, and a battery compartment (101) is provided on one side of the detection housing (1) below the spiral wire (8).

3. The device for detecting grounding of an instrument housing according to claim 2, wherein: The positive electrode of the battery (7) is electrically connected to the indicator light (4), the buzzer (3) and one end of the insulation resistance measurement circuit mechanism (6) through wires.

4. The device for detecting grounding of an instrument housing according to claim 3, wherein: The other ends of the insulation resistance measurement loop mechanism (6), the buzzer (3) and the indicator light (4) are all electrically connected to the three-position conversion switch (5) through wires, and the other ends of the buzzer (3) and the indicator light (4) are electrically connected to the same switch position on the three-position conversion switch (5), and the other end of the insulation resistance measurement loop mechanism (6) is electrically connected to the second switch position on the three-position conversion switch (5).

5. The device for detecting grounding of an instrument housing according to claim 4, characterized in that: The buzzer (3) and the indicator light (4) are electrically connected in parallel.

6. The device for detecting grounding of an instrument housing according to claim 5, characterized in that: When the three-position conversion switch (5) is rotated to the third switch position, it is in a circuit-breaking shutdown state, and the spiral wire (8) penetrates the detection housing (1) and is electrically connected to the circuit switching piece of the three-position conversion switch (5).

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