Mining explosion-proof insulation detection device

Abstract

The utility model discloses a mining explosion-proof insulation detection device, which comprises a meter body, a discharge loop switch, a detection mechanism and a warning mechanism, the meter body is provided with a wiring end, a ground wire end and a shielding end, a detection loop is electrically connected with the ground wire end and the wiring end, the detection loop is connected with the wiring end through an L-connection line, and the discharge loop switch is electrically connected with the shielding end through an L-connection line. The detection loop is connected with the ground wire end through an E grounding lead, the detection loop is used for detecting the insulation resistance of a detected piece, the detection loop is connected with a normally closed relay in series, the two ends of the discharge loop switch are connected with the E grounding lead and the L connecting line respectively and are normally open, and the discharge loop switch is used for discharging the detected piece. The detection mechanism is electrically connected with the normally-closed relay, the detection mechanism is used for detecting the gas concentration and sending a signal to the normally-closed relay, and the warning mechanism is electrically connected with the detection mechanism so as to receive the signal from the detection mechanism and send a warning signal. The mining explosion-proof insulation detection device provided by the utility model has the advantages of safety, explosion prevention and high reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of underground detection equipment, in particular to an explosion-proof insulation detection device for mining. Background Art

[0002] The megohmmeter circuit has a simple structure, high reliability and low price, so it is still widely used. However, the megohmmeter cannot achieve automatic discharge of the device under test when measuring insulation resistance. The residual charge on the device under test needs to be discharged through other devices after the test is completed. If there is no discharge or the discharge is insufficient, there is a risk of electric shock, which endangers personal and equipment safety. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model provides a mining explosion-proof insulation detection device, which has the advantages of safety, explosion-proof and high reliability.

[0004] According to the embodiment of the utility model, the explosion-proof insulation detection device for mining includes a meter body, a discharge circuit switch, a detection mechanism and a warning mechanism, the meter body has a wiring terminal, a ground terminal and a shielding terminal, the detection circuit is electrically connected to the ground terminal and the wiring terminal, the detection circuit is connected to the wiring terminal through an L connection line, the detection circuit is connected to the ground terminal through an E grounding lead, the detection circuit is used to detect the insulation resistance of the device under test, a normally closed relay is connected in series on the detection circuit, the two ends of the discharge circuit switch are respectively connected to the E grounding lead and the L connection line and are normally open, the discharge circuit switch is used to discharge the device under test, the detection mechanism is electrically connected to the normally closed relay, the detection mechanism is used to detect the gas concentration and send a signal to the normally closed relay, and the warning mechanism is electrically connected to the detection mechanism to receive the signal from the detection mechanism and send a warning signal.

[0005] The mining explosion-proof insulation detection device according to the embodiment of the utility model has the advantages of safety, explosion-proof and high reliability. The device of the present application has gas detection function and safe discharge function, eliminating the safety hazards of ordinary meggers, improving the safety of on-site operations, and preventing the device from working after detecting excessive gas concentration to avoid safety accidents. After the device detection is completed, the residual charge on the tested device can be released to ensure safety.

[0006] In some embodiments, the warning mechanism includes a warning light and / or a buzzer, and the warning light and / or the buzzer are electrically connected to the detection mechanism.

[0007] In some embodiments, a discharge circuit resistor is provided on the discharge circuit, and the discharge circuit resistor is connected in series with the discharge circuit switch and is used for discharge.

[0008] In some embodiments, the discharge circuit further includes a light emitting diode, which is connected in parallel with the discharge circuit resistor, and is used to indicate whether the discharge is sufficient.

[0009] In some embodiments, the detection mechanism includes a gas sensor, and the gas sensor is electrically connected to the normally closed relay to control the normally closed relay to close according to the gas concentration.

[0010] In some embodiments, the mining explosion-proof insulation detection device further includes a shell having a cavity, the meter body is located in the cavity, the connection terminal, ground terminal and shielding terminal of the meter body pass through the cavity and protrude out of the shell, and a lifting ring is provided on one side of the shell.

[0011] In some embodiments, the mining explosion-proof insulation detection device also includes a rotation speed sensor and a display screen, the rotation speed sensor is connected to the manual generator, the display screen is connected to the rotation speed sensor to display the number of rotations and the rotation frequency, and the display screen is located on the shell.

[0012] In some embodiments, the mining explosion-proof insulation detection device further includes a carbon dioxide gas tank, and the carbon dioxide gas tank is connected to the interior of the shell through a valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a circuit diagram of a meter body of a mining explosion-proof insulation detection device according to an embodiment of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the shell of the explosion-proof insulation detection device for mining according to the embodiment of the utility model.

[0015] Figure numerals: 1. Wiring terminal; 2. Ground terminal; 3. Shielding terminal; 4. Normally closed relay; 5. Discharge loop switch; 6. Discharge loop resistor; 7. Light emitting diode; 8. Manual generator; 9. Housing; 10. Display screen; 11. Carbon dioxide tank. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0017] According to the mining explosion-proof insulation detection device of the embodiment of the utility model, the mining explosion-proof insulation detection device includes a meter body, a discharge circuit switch 5, a detection mechanism and a warning mechanism, the meter body has a terminal 1, a ground terminal 2 and a shield terminal 3, the detection circuit is electrically connected to the ground terminal 2 and the terminal 1, the detection circuit is connected to the terminal 1 through an L connection line, the detection circuit is connected to the ground terminal 2 through an E grounding lead, the detection circuit is used to detect the insulation resistance of the measured object, the detection circuit is connected in series with a normally closed relay 4, the two ends of the discharge circuit switch 5 are respectively connected to the E grounding lead and the L connection line and are normally open, the discharge circuit switch 5 is used to discharge the measured object, the detection mechanism is electrically connected to the normally closed relay 4, the detection mechanism is used to detect the gas concentration and send a signal to the normally closed relay 4, and the warning mechanism is electrically connected to the detection mechanism to receive the signal from the detection mechanism and send a warning signal. The detection circuit is used to detect the resistance of the measured object, the discharge circuit is opened to discharge after the detection is completed to avoid the generation of electric sparks and endanger personal safety, and the detection mechanism can detect the gas concentration to avoid detection work when the gas concentration is high, thereby reducing safety risks. After receiving the signal, the warning agency will issue an alarm to remind staff that the current gas concentration is in a dangerous state.

[0018] It can be understood that the detection circuit has the same circuit structure as the ordinary megger. The normally closed relay set on the detection circuit can control the on and off of the detection circuit to ensure safe operation. The discharge circuit switch is convenient for the staff to control the equipment to release the charge of the tested device.

[0019] The mining explosion-proof insulation detection device according to the embodiment of the utility model has the advantages of safety, explosion-proof and high reliability.

[0020] In some embodiments, the warning mechanism includes a warning light and / or a buzzer, and the warning light and / or the buzzer are electrically connected to the detection mechanism.

[0021] Specifically, the warning light and buzzer can be configured together on the device or separately. When the detection mechanism detects that the gas concentration exceeds a preset value, a signal is sent, the warning light flashes or lights up, and the buzzer sounds a warning. The staff receives a warning to improve safety.

[0022] In some embodiments, a discharge circuit resistor 6 is provided on the discharge circuit, and the discharge circuit resistor 6 is connected in series with the discharge circuit switch 5 for discharge.

[0023] Specifically, the discharge circuit resistor 6 is arranged on the discharge circuit, and after the discharge circuit is connected, the charge generated by the test can be consumed through the discharge circuit resistor 6. The discharge circuit switch 5 is in a normally open state. After the insulation resistance value test of the device under test is completed, the test wiring remains unchanged, the megohmmeter working switch is turned off, and the terminal of the megohmmeter no longer has voltage, and then the discharge circuit switch 5 is closed. At this time, a discharge closed circuit consisting of the discharge circuit switch 5, the discharge circuit resistor 6, and the device under test is formed, and the discharge closed circuit releases the charge on the device under test.

[0024] In some embodiments, the discharge circuit further includes a light emitting diode 7, which is connected in parallel with the discharge circuit resistor 6. The light emitting diode 7 is used to indicate whether the discharge is sufficient.

[0025] Specifically, the light-emitting diode 7 is connected in parallel with the discharge loop resistor 6 so that the voltage of the light-emitting diode 7 is the same as that of the discharge loop resistor 6. The staff can determine whether the discharge is sufficient by observing the brightness of the light-emitting diode 7. When the light-emitting diode 7 is extinguished, it indicates that the discharge is completed.

[0026] In some embodiments, the detection mechanism includes a gas sensor, which is electrically connected to the normally closed relay 4 to control the normally closed relay 4 to close according to the gas concentration.

[0027] Specifically, the detection end of the gas sensor is located outside the device and contacts the external gas to detect the gas concentration in the gas. After detecting that the gas concentration exceeds the preset concentration value, a signal is sent to the normally closed relay 4. The normally closed relay 4 is disconnected to cut off the detection circuit to avoid danger during the detection process.

[0028] In some embodiments, the mining explosion-proof insulation detection device further includes a shell 9 having a cavity, the meter body is located in the cavity, the connection terminal 1, the ground terminal 2 and the shielding terminal 3 of the meter body pass through the cavity and protrude out of the shell 9, and a lifting ring is provided on one side of the shell 9.

[0029] Specifically, the housing 9 can be made of a plastic material with a certain strength. The plastic material reduces the weight of the detection device and has an insulating effect. A lifting ring is provided on one side of the housing 9 for the convenience of the staff to carry or hang it. Placing the meter body in the cavity of the housing 9 can protect the meter body. The cavity can isolate the influence of the discharge of the meter body on the external gas to a certain extent.

[0030] In some embodiments, the mining explosion-proof insulation detection device also includes a speed sensor and a display screen 10. The speed sensor is connected to the manual generator 8. The display screen 10 is connected to the speed sensor to display the number of rotations and the rotation frequency. The display screen 10 is located on the shell 9.

[0031] Specifically, the speed sensor is connected to the manual generator 8 of the meter body to reflect in real time the number of rotations and the rotation frequency of the manual generator 8 when the staff is testing, which helps the staff to smoothly rotate the manual generator 8 and improve the test effect. The display screen 10 is set on the outer surface of the shell 9 to display the data from the speed sensor, so that the data can be understood intuitively and clearly.

[0032] In some embodiments, the mining explosion-proof insulation detection device further includes a carbon dioxide gas tank 11 , and the carbon dioxide gas tank 11 is connected to the interior of the housing 9 through a valve.

[0033] Specifically, the carbon dioxide gas cylinder 11 adopts a small gas cylinder. The carbon dioxide gas cylinder 11 transports inert gas carbon dioxide into the interior of the shell 9 to ensure that an inert environment is formed inside the shell 9. Before discharging, the carbon dioxide gas cylinder 11 is turned on to transport carbon dioxide to the interior of the shell 9, and the discharge circuit switch 5 is turned on. Even if an arc is generated during the discharge process, it will be quickly extinguished in the inert environment to ensure safety.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0039] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A mining explosion-proof insulation detection device, characterized in that: include: A meter body, the meter body having a wiring terminal, a ground terminal and a shield terminal, a detection circuit being electrically connected to the ground terminal and the wiring terminal, the detection circuit being connected to the wiring terminal through an L connection line, the detection circuit being connected to the ground terminal through an E grounding lead, the detection circuit being used to detect the insulation resistance of the device under test, and a normally closed relay being connected in series to the detection circuit; A discharge circuit switch, two ends of which are respectively connected to the E ground lead and the L ground line and are normally open, and the discharge circuit switch is used to discharge the device under test; A detection mechanism, the detection mechanism is electrically connected to the normally closed relay, and the detection mechanism is used to detect the gas concentration and send a signal to the normally closed relay; The warning mechanism is electrically connected to the detection mechanism to receive a signal from the detection mechanism and send out a warning signal.

2. The explosion-proof insulation detection device for mining according to claim 1, characterized in that: The warning mechanism includes a warning light and / or a buzzer, and the warning light and / or the buzzer are electrically connected to the detection mechanism.

3. The explosion-proof insulation detection device for mining according to claim 1, characterized in that: A discharge circuit resistor is arranged on the discharge circuit, and the discharge circuit resistor is connected in series with the discharge circuit switch for discharge.

4. The explosion-proof insulation detection device for mining according to claim 3, characterized in that: It also includes a light emitting diode, which is connected in parallel with the discharge loop resistor and is used to indicate whether the discharge is sufficient.

5. The explosion-proof insulation detection device for mining according to claim 1, characterized in that: The detection mechanism includes a gas sensor, and the gas sensor is electrically connected to the normally closed relay to control the normally closed relay to close according to the gas concentration.

6. The explosion-proof insulation detection device for mining according to claim 1, characterized in that: It also includes a shell, which has a cavity. The meter body is located in the cavity. The connection terminal, ground terminal and shielding terminal of the meter body pass through the cavity and protrude out of the shell. A lifting ring is arranged on one side of the shell.

7. The explosion-proof insulation detection device for mining according to claim 6, characterized in that: It also includes a rotation speed sensor and a display screen. The rotation speed sensor is connected to the manual generator. The display screen is connected to the rotation speed sensor to display the number of rotations and the rotation frequency. The display screen is located on the shell.

8. The explosion-proof insulation detection device for mining according to claim 6, characterized in that: It also includes a carbon dioxide gas tank, which is connected to the inside of the shell through a valve.

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