Motor insulation monitoring device

Abstract

The utility model discloses motor insulation monitoring devices, including shell body and apron, apron hinged is located on the shell body upper portion one side, still includes incoming line pipe, outgoing line pipe, monitoring mechanism and on -off connection subassembly, incoming line pipe is communicated in the shell body one side, outgoing line pipe is communicated in the shell body far from the side wall of incoming line pipe one side, is used for the ground wire to pass through the shell body and goes in and out the wiring, on -off connection subassembly fixed connection is in the shell body inner bottom wall, and is located between incoming line pipe and outgoing line pipe, monitoring mechanism is located in the shell body upper wall, and is provided with on -off connection subassembly parallelly. The utility model belongs to motor protection equipment technical field, and specifically is a kind of ground wire initiative monitoring for motor insulation, avoids measurement after shutdown, improves the motor insulation monitoring device of the convenience of monitoring.

Description

Technical Field

[0001] This utility model belongs to the technical field of motor protection equipment, and in particular relates to a motor insulation monitoring device. Background Technology

[0002] Motor insulation monitoring devices are used to assess the insulation status of electrical equipment. Their core purpose is to prevent leakage, short circuits, equipment damage, and even safety accidents caused by insulation deterioration. When motor insulation deteriorates, current flows through the damaged insulation layer → motor casing → ground wire → back to the power supply neutral point or earth.

[0003] Motor insulation cannot be observed with the naked eye. Furthermore, existing motor insulation monitoring devices require the motor to be shut down and powered off when tested with a megohmmeter, which affects the use of the motor. Utility Model Content

[0004] The technical problem this invention aims to solve is the active monitoring of the ground wire of motor insulation, avoiding measurement after shutdown and improving monitoring convenience.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a motor insulation monitoring device, including a housing and a cover plate, wherein the cover plate is hinged to one side of the upper part of the housing, and further including an inlet pipe, an outlet pipe, a monitoring mechanism and a switching connection assembly, wherein the inlet pipe is connected to one side of the housing, and the outlet pipe is connected to the side wall of the housing away from the inlet pipe, for the ground wire to pass through the housing for entry and exit wiring, the switching connection assembly is fixedly connected to the bottom wall of the housing and located between the inlet pipe and the outlet pipe, and the monitoring mechanism is located on the upper wall of the housing and is arranged in parallel with the switching connection assembly.

[0006] Furthermore, the switching connection assembly includes a circuit breaker and a wiring trough. The circuit breaker is fixedly connected to the middle of the bottom wall of the housing and connected to the middle section of the ground wire. The wiring trough is fixedly connected to both sides of the bottom wall of the housing and is symmetrically distributed with the circuit breaker as the center. The side wall of the wiring trough near the monitoring mechanism has a through hole.

[0007] Preferably, the inlet pipe, cable tray, circuit breaker, and outlet pipe are arranged along the length of the outer casing.

[0008] Furthermore, the monitoring mechanism includes a buzzer and an ammeter. The buzzer is installed on one side of the upper wall of the outer casing, and the ammeter is installed on the upper wall of the outer casing and is arranged adjacent to the buzzer.

[0009] Furthermore, the buzzer and the ammeter are connected in series. The end of the buzzer furthest from the ammeter is electrically connected to the ground wire, and the end of the ammeter furthest from the buzzer is electrically connected to the ground wire, forming a parallel circuit with the ground wire.

[0010] Furthermore, both the inlet and outlet pipes are equipped with rubber flaps.

[0011] After adopting the above structure, the beneficial effects of this utility model are as follows: For the insulation monitoring of the motor, the ground wire is monitored in parallel with the motor ground wire during the operation. The circuit breaker is located in the middle of the ground wire and is in the normally closed state, so that the ground wire is directly grounded and the current will not pass through the side of the parallel ammeter with resistance.

[0012] During testing, if the buzzer sounds and the ammeter fluctuates when the circuit breaker is disconnected and the ground wire is energized through a parallel circuit, then the motor's insulation is aging. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0014] Figure 1 This is a schematic diagram of the overall structure of the motor insulation monitoring device proposed in this utility model;

[0015] Figure 2 This is a schematic diagram of the on / off connection assembly structure of the motor insulation monitoring device proposed in this utility model;

[0016] Figure 3 This is a top view of the internal structure of the motor insulation monitoring device proposed in this utility model;

[0017] Figure 4 This is a schematic diagram of the internal structure of the motor insulation monitoring device proposed in this utility model from the front view.

[0018] Figure 5 This is the circuit wiring diagram of the motor insulation monitoring device proposed in this utility model.

[0019] In the attached diagram: 1. Outer casing, 2. Cover plate, 3. Inlet pipe, 4. Outlet pipe, 5. Monitoring mechanism, 6. On / off connection assembly, 7. Circuit breaker, 8. Cable tray, 9. Buzzer, 10. Ammeter, 11. Rubber flap, 12. Through hole. Detailed Implementation

[0020] like Figure 1-5As shown, the motor insulation monitoring device includes a housing 1 and a cover plate 2. The cover plate 2 is hinged to one side of the upper part of the housing 1. It also includes an inlet pipe 3, an outlet pipe 4, a monitoring mechanism 5, and a switching connection assembly 6. The inlet pipe 3 is connected to one side of the housing 1, and the outlet pipe is connected to the side wall of the housing 1 away from the inlet pipe 3, for the ground wire to pass through the housing 1 for entry and exit. The switching connection assembly 6 is fixedly connected to the inner bottom wall of the housing 1 and is located between the inlet pipe 3 and the outlet pipe 4. Mechanism 5 is installed on the upper wall of the outer casing 1 and is connected in parallel with the on / off connection assembly 6. Both the inlet pipe 3 and the outlet pipe are equipped with rubber flaps 11 for sealing the inlet pipe 3 and the outlet pipe 4, so that a relatively closed cavity is formed inside the outer casing 1. The ground wire is split into two sections and passes through the inlet pipe 3 and the outlet pipe respectively, and is connected to the on / off connection assembly 6 to form a path for the ground wire. At the same time, the monitoring mechanism 5 is connected in parallel at both ends of the on / off connection assembly 6 to monitor the insulation of the motor by monitoring the ground wire current.

[0021] like Figure 2 and Figure 3 As shown, in order to achieve on / off control of the ground wire and facilitate auxiliary monitoring by the monitoring mechanism 5, the on / off connection component 6 includes a circuit breaker 7 and a wiring trough 8. The circuit breaker 7 is fixedly connected to the middle of the bottom wall of the outer casing 1 and connected to the middle section of the ground wire. The wiring trough 8 is fixedly connected to both sides of the bottom wall of the outer casing 1 and is symmetrically distributed with the circuit breaker 7 as the center. The side wall of the wiring trough 8 near the monitoring mechanism 5 has a through hole 12. The inlet pipe 3, the wiring trough 8, the circuit breaker 7 and the outlet pipe 4 are arranged along the length of the outer casing 1. The symmetrically distributed wiring trough 8 is used to support the two bottom wires connected to the circuit breaker 7. The through hole 12 on the side wall of the wiring trough 8 is used for the wires connected to the monitoring mechanism 5 to pass through the wiring trough 8.

[0022] like Figure 1-3 As shown, in order to monitor whether the ground wire is energized, the monitoring mechanism 5 includes a buzzer 9 and an ammeter 10. The buzzer 9 is installed on one side of the upper wall of the housing 1, and the ammeter 10 is installed on the upper wall of the housing 1 and is adjacent to the buzzer 9. The buzzer 9 and the ammeter 10 are connected in series. The end of the buzzer 9 away from the ammeter 10 is electrically connected to the ground wire, and the end of the ammeter 10 away from the buzzer 9 is electrically connected to the ground wire, forming a parallel circuit with the ground wire. Two wires are led out from the two ends of the series-connected buzzer 9 and ammeter 10, respectively, and passed into the wiring trough 8 and connected to the two ground wires. The parallel circuit uses the buzzer 9 as a resistor to detect whether the ground wire is energized after the circuit breaker 7 is turned off. In the initial state, the circuit breaker 7 is normally closed, so that the ground wire is grounded.

[0023] In practical use, the operator cuts the ground wire of the motor housing into two sections. One section of the ground wire, which is connected to the motor housing, passes through the inlet pipe 3 and through the side wiring groove 8 to connect to one end of the circuit breaker 7. The other section of the ground wire passes through the outlet pipe 4, is also carried by the side wiring groove 8, and is connected to the other end of the circuit breaker 7. The other end of the ground wire is grounded, and the circuit breaker 7 controls the on / off state of the ground wire.

[0024] Meanwhile, the buzzer 9 and the ammeter 10 are connected in series with a wire, and wires are extended from the other end of the buzzer 9 and the ammeter 10 respectively, passing through the through hole 12 and connected in parallel with the two ground wires in the wiring groove 8.

[0025] In the initial state, circuit breaker 7 is normally closed, so the ground wire is connected to the ground. Buzzer 9 acts as a resistor. If there is current in the ground wire, the current will flow to the ground through the ground wire and will not damage ammeter 10.

[0026] During testing, the circuit breaker 7 is disconnected, the ground wire is disconnected, and the current flows through the wire connected to the buzzer 9, forming a path with the buzzer 9 and the ammeter 10. If the buzzer 9 sounds and the pointer of the ammeter 10 fluctuates, the ground wire is energized, thus realizing the insulation monitoring of the motor.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents. In conclusion, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A motor insulation monitoring device, comprising a housing (1) and a cover plate (2), wherein the cover plate (2) is hinged to one side of the upper part of the housing (1), characterized in that: It also includes an inlet pipe (3), an outlet pipe (4), a monitoring mechanism (5), and a switching connection assembly (6). The inlet pipe (3) is connected to one side of the outer shell (1), and the outlet pipe is connected to the side wall of the outer shell (1) away from the inlet pipe (3) for the ground wire to pass through the outer shell (1) for wiring. The switching connection assembly (6) is fixedly connected to the bottom wall inside the outer shell (1) and is located between the inlet pipe (3) and the outlet pipe (4). The monitoring mechanism (5) is located on the upper wall of the outer shell (1) and is arranged in parallel with the switching connection assembly (6).

2. The motor insulation monitoring device according to claim 1, characterized in that: The switching connection assembly (6) includes a circuit breaker (7) and a wiring trough (8). The circuit breaker (7) is fixedly connected to the middle of the bottom wall of the outer casing (1) and connected to the middle section of the ground wire. The wiring trough (8) is fixedly connected to both sides of the bottom wall of the outer casing (1) and is symmetrically distributed with the circuit breaker (7) as the center. The wiring trough (8) has a through hole (12) on the side wall near the monitoring mechanism (5).

3. The motor insulation monitoring device according to claim 2, characterized in that: The inlet pipe (3), the cable tray (8), the circuit breaker (7) and the outlet pipe (4) are arranged along the length of the outer casing (1).

4. The motor insulation monitoring device according to claim 1, characterized in that: The monitoring mechanism (5) includes a buzzer (9) and an ammeter (10). The buzzer (9) is installed on one side of the upper wall of the outer casing (1), and the ammeter (10) is installed on the upper wall of the outer casing (1) and is arranged adjacent to the buzzer (9).

5. The motor insulation monitoring device according to claim 4, characterized in that: The buzzer (9) and the ammeter (10) are connected in series. The end of the buzzer (9) away from the ammeter (10) is electrically connected to the ground wire, and the end of the ammeter (10) away from the buzzer (9) is electrically connected to the ground wire, forming a parallel circuit with the ground wire.

6. The motor insulation monitoring device according to claim 1, characterized in that: Both the inlet pipe (3) and the outlet pipe are equipped with rubber valves (11).

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