Electricity testing trolley

Abstract

The utility model discloses an electricity testing trolley, which comprises a chassis, a frame is fixed above the chassis, the frame is fixedly connected with a plurality of contact arms, a voltage sensor is arranged between the frame and the contact arms, and the voltage sensor is electrically connected with an alarm device. A detection capacitor is installed in cooperation with the voltage sensor and connected with a detection resistor in parallel to form a parallel structure, one end of the parallel structure is electrically connected with one end of a switch, the other end of the parallel structure is electrically connected with one end of a power source, and the other end of the switch is electrically connected with the other end of the power source to form a closed loop. According to the utility model, whether the electrified display, the voltage sensor and the corresponding line are damaged can be detected, so that the electric shock risk caused by unknowing of operators when the electrified display, the voltage sensor and the corresponding line are damaged can be prevented.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to an electrical testing trolley. Background Art

[0002] The primary purpose of a voltage test cart is to ensure that operators can safely confirm whether the switchgear is live during maintenance, thereby avoiding safety accidents caused by misoperation. By carrying a high-voltage live display device, the voltage test cart can test the switchgear before operation, ensuring a safe operating environment. For example, utility model patent CN217036527 U discloses a 10kV switchgear auxiliary voltage test cart, and CN 102222864 A discloses a handcart switch line electrical voltage test device specifically for 35kV switchgear. Both use a live display to indicate whether the switchgear is live. If it is live, maintenance work cannot be performed. A lit indicator indicates live, while an off indicator indicates no live. However, if the live display or voltage sensor malfunctions, even if the switchgear is live, the live display will not illuminate, making maintenance work dangerous. Therefore, improvements are needed. Utility Model Content

[0003] In order to solve the above technical problems, the utility model proposes an electrical testing trolley.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A small electrical testing vehicle includes a chassis, a frame fixed above the chassis, a plurality of contact arms fixedly connected to the frame, a voltage sensor installed between the frame and the contact arm, and the voltage sensor is electrically connected to an alarm device; a detection capacitor is installed in conjunction with the voltage sensor, and the detection capacitor is connected in parallel with a detection resistor to form a parallel structure, one end of the parallel structure is electrically connected to one end of a switch, and the other end is electrically connected to one end of a power supply, and the other end of the switch is electrically connected to the other end of the power supply to form a closed loop.

[0006] As a further improvement, the contact arms include upper contact arms and lower contact arms, with three upper contact arms and three lower contact arms.

[0007] As a further improvement, multiple detection capacitors are arranged in parallel.

[0008] As a further improvement, the alarm device is a charged display or a buzzer.

[0009] As a further improvement, the alarm device is a live indicator, and the live indicator is an LED light electrically connected to the contact arm.

[0010] As a further improvement, a plum blossom contact is fixed to the front end of the contact arm.

[0011] As a further improvement, rollers are installed on both sides of the chassis.

[0012] The beneficial effects of the present utility model are:

[0013] The utility model can detect whether the live display, the voltage sensor and the corresponding circuits are damaged, thereby preventing the risk of electric shock caused by the operator's ignorance when they are damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0015] Figure 1 A side structural diagram of the utility model;

[0016] Figure 2 A schematic diagram of the front structure of the utility model;

[0017] Figure 3 Schematic diagram of the circuit structure of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and examples. Specific implementation method 1

[0020] The L-shaped folding structure, a cell packaging structure of the present invention, will be described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-3 The electrical testing trolley shown includes a chassis 1, rollers 2, a power supply 3, a frame 4, a contact arm 5, an upper contact arm 51, a lower contact arm 52, a plum blossom contact 53, a voltage sensor 6, a charged display 7, an LED light 71, a detection capacitor 8, a detection resistor 9 and a switch 10.

[0022] A vehicle frame 4 is fixed above the chassis 1, with rollers 2 mounted on both sides. The upper portion of the vehicle frame 4 is connected to three upper contact arms 51 arranged side by side, and the lower portion is connected to three lower contact arms 52 arranged side by side. A voltage sensor 6 is installed between the vehicle frame 4 and one or more of the contact arms 5. The voltage sensor 6 is electrically connected to a charge indicator 7. The charge indicator 7 can also be replaced with another alarm device such as a buzzer. In order to detect whether the circuits between the voltage sensor 6 and the charge indicator 7 are broken, the equipment is damaged, or other faults, a detection capacitor 8 is installed in conjunction with each voltage sensor 6. The detection capacitors 8 are arranged in parallel with each other and are electrically connected in parallel with a detection resistor 9. A series switch 10 and the power supply 3 then form a closed loop.

[0023] In this way, before pushing the electrical testing trolley into the switch cabinet, first close the switch 10. At this time, the closed circuit is connected, and the voltage of two tons across the detection resistor 9 is the voltage across the detection capacitor 8. The voltage sensor 6 detects the corresponding voltage, causing the corresponding LED light on the power display 7 to light up. If the LED light is not on, it means there is a line fault.

[0024] If the corresponding LDE lights are all on, disconnect the switch 10 and push the power test trolley into the switch cabinet. At this time, the corresponding LED lights on the power display 7 are on, which means that maintenance is not yet possible. Otherwise, maintenance can be started.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. An electrical testing vehicle, comprising a chassis (1), a vehicle frame (4) fixed above the chassis (1), a plurality of contact arms (5) fixedly connected to the vehicle frame (4), characterized in that: A voltage sensor (6) is installed between the vehicle frame (4) and the contact arm (5), and the voltage sensor (6) is electrically connected to an alarm device; a detection capacitor (8) is installed in conjunction with the voltage sensor (6), and the detection capacitor (8) is connected in parallel with a detection resistor (9) to form a parallel structure, one end of the parallel structure is electrically connected to one end of a switch (10), and the other end is electrically connected to one end of a power supply (3), and the other end of the switch (10) is electrically connected to the other end of the power supply (3) to form a closed loop.

2. The electrical testing vehicle according to claim 1, characterized in that: The contact arm (5) comprises an upper contact arm (51) and a lower contact arm (52), wherein there are three upper contact arms (51) and three lower contact arms (52).

3. The electrical testing vehicle according to claim 1, characterized in that: A plurality of detection capacitors (8) are arranged in parallel.

4. The electrical testing vehicle according to claim 1, characterized in that: The alarm device is a charged display (7) or a buzzer.

5. The electrical testing vehicle according to claim 4, characterized in that: The alarm device is a charged display (7), and the charged display (7) is provided with an LED light (71) electrically connected to the contact arm (5).

6. The electrical testing vehicle according to claim 1, characterized in that: A plum blossom contact (53) is fixed to the front end of the contact arm (5).

7. The electrical testing vehicle according to claim 1, characterized in that: Rollers (2) are installed on both sides of the chassis (1).

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