Subway vehicle relay contact electric cleaning tool

Abstract

The utility model belongs to the technical field of electronic and electrical engineering, and particularly relates to a metro vehicle relay contact electric cleaning tool which comprises a 24V switching power supply, a power plug, a first connecting line and a third connecting line are arranged on the left side of the 24V switching power supply, one end of the first connecting line is connected with the 24V switching power supply through a screw, and the other end of the first connecting line is connected with the third connecting line through a screw. A slide rheostat is arranged at the other end of the first connecting line; 220V household electricity is converted into 24V safety voltage through the arranged 24V switching power supply, the sliding connecting ring is pushed to move on the resistance rod, the resistance is adjusted, the cleaning tool can output current of about 1A, the positive electrode and the negative electrode are connected to the two ends of a relay contact respectively, electrification is conducted for several times, and oxides on the surface of the relay contact are removed through current arc discharge.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electronic and electrical engineering technical field, specifically is a subway vehicle relay contact point electric cleaning frock. BACKGROUND

[0002] Relay is a kind of when input (such as voltage, current, temperature, etc.) reaches certain value, output will jump change automatic control device. It has control system (also called input loop) and controlled system (also called output loop), usually applied in automatic control circuit, actually it is with smaller current to control larger current a kind of " automatic switch ". In circuit, relay plays automatic regulation, safety protection, conversion circuit etc.

[0003] After long time action, the surface of relay will produce chemical reaction with oxygen in air, generates a layer of oxide, causes contact resistance to increase, can reduce the sensitivity and response speed of relay, thereby influence its control effect, in extreme case, relay can fail due to performance decline, lead to the problem of circuit unable normal work.

[0004] Therefore, aiming at the above problem, a subway vehicle relay contact point electric cleaning frock is provided. CONTENT OF UTILITY MODEL

[0005] (One) technical problem solved

[0006] In view of the deficiency of prior art, the utility model provides a subway vehicle relay contact point electric cleaning frock, solves the problem that the oxide of relay surface oxidation is generated, causes contact resistance to increase, can reduce the sensitivity and response speed of relay, thereby influence its control effect, even lead to relay failure due to performance decline.

[0007] (Two) technical scheme

[0008] To realize the above-mentioned purpose, the utility model provides the following technical scheme: a subway vehicle relay contact point electric cleaning frock, including 24V switching power supply, the left side of 24V switching power supply is provided with power plug, first connecting wire and third connecting wire, one end of first connecting wire is connected with 24V switching power supply by screw, and the other end of first connecting wire is provided with sliding rheostat.

[0009] Further, the sliding rheostat includes resistance rod and sliding connection ring, the right end of resistance rod is connected with first connecting wire by screw, and the sliding connection ring slides on resistance rod.

[0010] Further, the sliding connection ring is provided with a second connecting line, one end of the second connecting line is connected with the sliding connection ring through a screw, the other end of the second connecting line is provided with a positive electrode, and the other end of the second connecting line is fixedly connected with the positive electrode.

[0011] Further, one end of the third connecting line is connected with the right side of the 24V switching power supply through a screw, the other end of the third connecting line is provided with a negative electrode, and the negative electrode is fixedly connected with the other end of the third connecting line.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the subway vehicle relay contact electric cleaning tool has the following beneficial effects:

[0014] The subway vehicle relay contact electric cleaning tool converts 220V household power into 24V safe voltage through the 24V switching power supply, drives the sliding connection ring to move on the resistance rod, adjusts the resistance size, enables the cleaning tool to output an electric current of about 1A, connects the positive electrode and the negative electrode to the two ends of the relay contact respectively, and removes the surface oxides of the relay contact by using the current arc after power-on for several times. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings:

[0016] Figure 1 is a three-dimensional structure schematic view of the present application.

[0017] LEGEND:

[0018] 1, 24V switching power supply; 2, power plug; 3, first connecting line; 4, sliding resistor; 401, resistance rod; 402, sliding connection ring; 5, second connecting line; 6, positive electrode; 7, third connecting line; 8, negative electrode. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] Specific embodiments will be given below.

[0021] Please refer toFigure 1 The utility model provides a subway vehicle relay contact point electric cleaning frock, including 24V switching power supply 1, the left side of 24V switching power supply 1 is provided with power plug 2, first connecting wire 3 and third connecting wire 7, one end of first connecting wire 3 is connected with 24V switching power supply 1 through screw, and the other end of first connecting wire 3 is provided with sliding rheostat 4, sliding rheostat 4 includes resistance rod 401 and sliding connection ring 402, the right end of resistance rod 401 is connected with first connecting wire 3 through screw, sliding connection ring 402 slides on resistance rod 401, be provided with second connecting wire 5 on sliding connection ring 402, one end of second connecting wire 5 is connected with sliding connection ring 402 through screw, the other end of second connecting wire 5 is provided with positive pole 6, and the other end of second connecting wire 5 is fixedly connected with positive pole 6, one end of third connecting wire 7 is connected with the right side of 24V switching power supply 1 through screw, the other end of third connecting wire 7 is provided with negative pole 8, and negative pole 8 is fixedly connected with the other end of third connecting wire 7.

[0022] Specifically, 24V switching power supply 1 converts 220V household electricity into 24V safe voltage, moves sliding connection ring 402 on resistance rod 401, adjusts resistance size, makes that cleaning frock can output about 1A electric current, connects positive pole 6 and negative pole 8 respectively in both ends of relay contact point, carries out power-on several times, removes the oxide on the surface of relay contact point using current arc.

[0023] Working principle: when using the cleaning frock, first power plug 2 is inserted into household power supply, 24V switching power supply 1 converts 220V household electricity into 24V safe voltage, moves sliding connection ring 402 on resistance rod 401, adjusts resistance size, makes that cleaning frock can output about 1A electric current, connects positive pole 6 and negative pole 8 respectively in both ends of relay contact point, carries out power-on several times, removes the oxide on the surface of relay contact point using current arc.

[0024] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, various changes and improvements can be made to the utility model, and these changes and improvements fall within the scope of the claimed utility model.

Claims

1. A cleaning fixture for relay contacts in subway vehicles, comprising a 24V switching power supply (1), characterized in that: The 24V switching power supply (1) is provided with a power plug (2), a first connecting line (3) and a third connecting line (7) on the left side. One end of the first connecting line (3) is connected to the 24V switching power supply (1) by a screw, and the other end of the first connecting line (3) is provided with a sliding rheostat (4).

2. The cleaning fixture for relay contacts of a subway vehicle according to claim 1, characterized in that: The sliding rheostat (4) includes a resistor rod (401) and a sliding connecting ring (402). The right end of the resistor rod (401) is connected to the first connecting line (3) by a screw, and the sliding connecting ring (402) slides on the resistor rod (401).

3. The cleaning fixture for relay contacts of a subway vehicle according to claim 2, characterized in that: The sliding connecting ring (402) is provided with a second connecting line (5). The sliding connecting ring (402) is connected to one end of the second connecting line (5) by a screw. The other end of the second connecting line (5) is provided with a positive electrode (6), and the other end of the second connecting line (5) is fixedly connected to the positive electrode (6).

4. The cleaning fixture for relay contacts of a subway vehicle according to claim 1, characterized in that: One end of the third connecting line (7) is connected to the right side of the 24V switching power supply (1) by a screw. The other end of the third connecting line (7) is provided with a negative terminal (8), and the negative terminal (8) is fixedly connected to the other end of the third connecting line (7).

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