Safety type high-voltage direct-current relay

Abstract

The utility model discloses a safety type high-voltage direct-current relay, which comprises a body, two binding posts, an energy-saving circuit board and the like, and is mainly characterized in that a temperature sensor is arranged on the body to monitor the temperature of the binding posts in real time, and a signal is transmitted to a temperature signal input end on the energy-saving circuit board through a temperature detection line; meanwhile, an over-temperature signal output end and an over-temperature alarm indicating lamp are additionally arranged on the energy-saving circuit board; thus, when the high-voltage direct-current relay works, once the temperature sensor monitors that the temperature of the binding post exceeds a threshold value, the over-temperature alarm indicating lamp is lightened to form early warning, and the energy-saving circuit board is synchronously controlled to turn off coil current of the high-voltage direct-current relay and turn off a load circuit, and an alarm signal is synchronously output through the over-temperature signal output line. Therefore, the purpose of safe use is achieved; in addition, the energy-saving circuit board is also provided with a coil power-on indicating lamp, so that an operator can intuitively judge the on-off state of the circuit conveniently, electric shock accidents are effectively avoided, and potential safety hazards are greatly eliminated.

Description

Technical Field

[0001] The utility model relates to a DC relay, in particular to a safety type high-voltage DC relay. Background Art

[0002] In order to reduce the coil power consumption, a high-voltage DC relay (or contactor) usually utilizes the principle that the energy required to keep the contact closed by the coil is much less than the energy required at the moment of suction. An energy-saving circuit board is used to control the coil power-on, that is, within about 100 ms of power-on, a large current is output to make the contact closed. After the contact is closed, the current is chopped to keep the coil power at a relatively low level. However, the traditional energy-saving circuit board cannot intuitively display whether the circuit is powered on, and its function is relatively single. When the contact of the high-voltage DC relay is closed to connect the circuit, since the load is a high voltage (1000 - 1500 V), but the operator cannot intuitively judge the on-off state of the circuit, it is easy to cause electric shock accidents and there are certain safety hazards. At the same time, in the actual application process of the high-voltage DC relay, there are often thermal runaway phenomena caused by various reasons. However, currently, neither in the body structure nor in the energy-saving circuit board, relevant designs are made to warn and control the thermal runaway phenomenon, which obviously also has great safety hazards. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a safety type high-voltage DC relay that can not only perform over-temperature warning and control, but also perform high-voltage circuit power-on indication.

[0004] The technical problem of the utility model is realized through the following technical solutions:

[0005] A safety type high-voltage DC relay includes a body, two terminal posts arranged outside the body, and an energy-saving circuit board arranged inside the body. The energy-saving circuit board is provided with a coil signal input end and a coil signal output end. A temperature sensor is arranged on the body adjacent to the terminal post installation. The temperature sensor monitors the temperature of the terminal post in real time and transmits the signal to the temperature signal input end on the energy-saving circuit board through a temperature detection line. The energy-saving circuit board is provided with an over-temperature signal output end and an over-temperature alarm indicator. The over-temperature signal output end extends out of the body through an over-temperature signal output line, and the over-temperature alarm indicator extends out of the body and is exposed.

[0006] When the high-voltage DC relay works, the temperature sensor monitors that the temperature of the terminal post exceeds the threshold value, thereby lighting up the over-temperature alarm indicator, and simultaneously controlling the energy-saving circuit board to cut off the coil current of the high-voltage DC relay and disconnect the load circuit. The corresponding over-temperature signal output line synchronously outputs an alarm signal.

[0007] The energy-saving circuit board is provided with a coil power-on indicator light. The coil power-on indicator light extends out of the body and is exposed. When the coil of the high-voltage DC relay inputs current, the coil power-on indicator light is lit, or when the current is cut off, the coil power-on indicator light is turned off.

[0008] The temperature sensor is arranged between two terminal posts and embedded in epoxy resin.

[0009] The overtemperature alarm indicator light and the coil power-on indicator light are arranged adjacent to each other. The overtemperature alarm indicator light is a red indicator light, and the coil power-on indicator light is a green indicator light.

[0010] Compared with the prior art, the utility model mainly has a temperature sensor installed adjacent to the terminal posts on the body of the high-voltage DC relay. The temperature sensor is used to monitor the temperature of the terminal posts in real time, and then transmits the signal to the temperature signal input end on the energy-saving circuit board through the temperature detection line. At the same time, the energy-saving circuit board is additionally provided with an overtemperature signal output end and an overtemperature alarm indicator light. The overtemperature signal output end extends out of the body through the overtemperature signal output line, and the overtemperature alarm indicator light extends out of the body and is exposed. In this way, when the high-voltage DC relay is working, when the temperature of the terminal posts monitored by the temperature sensor exceeds the threshold value, the overtemperature alarm indicator light will be lit to form a warning. At the same time, it will synchronously control the energy-saving circuit board to cut off the coil current of the high-voltage DC relay and disconnect the load circuit, and output an alarm signal synchronously through the overtemperature signal output line, so as to achieve the purpose of safe use. In addition, the energy-saving circuit board is also provided with a coil power-on indicator light, and when the coil of the high-voltage DC relay inputs current, the coil power-on indicator light is lit, or when the current is cut off, the coil power-on indicator light is turned off, which is convenient for the operator to intuitively judge the on-off state of the circuit, thus effectively avoiding electric shock accidents and greatly eliminating potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a structural schematic diagram of the utility model.

[0012] Figure 2 is Figure 1 the top view state diagram (the temperature sensor is exposed).

[0013] Figure 3 is a structural schematic diagram of the energy-saving circuit board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following will further describe the embodiments of the utility model in detail according to the above-mentioned drawings.

[0015] Such as Figures 1 to 3As shown, 1. Body, 2. Terminal, 3. Temperature detection wire, 4. Over-temperature signal output wire, 5. Over-temperature alarm indicator light, 6. Coil power-on indicator light, 7. Temperature sensor, 8. Energy-saving circuit board, 81. Coil signal input terminal, 82. Temperature signal input terminal, 83. Over-temperature signal output terminal, 84. Coil signal output terminal.

[0016] A safety type high-voltage DC relay, as Figure 1 shown, includes a body 1, two terminals 2 arranged outside the body, and an energy-saving circuit board 8 arranged inside the body; wherein, the body 1 is made of high-quality plastic, and the two terminals 2 are respectively arranged at the top of the body 1, usually a positive terminal and a negative terminal, and a Figure 2 shown temperature sensor 7, that is, a thermocouple, is arranged between the two terminals. The temperature sensor 7 is embedded in epoxy resin to form a closed structure.

[0017] The energy-saving circuit board 8 is provided with a plurality of wiring terminals. In this embodiment, Figure 3 shown, from left to right in sequence are a coil signal input terminal 81, a temperature signal input terminal 82, an over-temperature signal output terminal 83, and a coil signal output terminal 84. An over-temperature alarm indicator light 5 and a coil power-on indicator light 6 are also arranged side by side on the right side of the energy-saving circuit board 8.

[0018] The two terminals 2 are respectively connected to the coil signal input terminal 81 and the coil signal output terminal 84 to control the on-off of the coil current formed by the energy-saving circuit board 8; the temperature sensor 7 monitors the temperature of the terminal 2 and its surrounding area in real time, and transmits a signal to the temperature signal input terminal 82 through the temperature detection wire 3; the over-temperature signal output terminal 83 extends out of the body 1 through the over-temperature signal output wire 4 to output an alarm signal.

[0019] The over-temperature alarm indicator light 5 and the coil power-on indicator light 6 both extend out of the body 1 and are also arranged adjacent to each other. The over-temperature alarm indicator light 5 is a red indicator light, and the coil power-on indicator light 6 is a green indicator light. They usually adopt the form of LED indicator lights.

[0020] In this way, when the high-voltage DC relay is working, if the terminal 2 and its surrounding area have abnormal heating due to various reasons, once the temperature sensor 7 monitors that the abnormal heating temperature of the terminal 2 and its surrounding area exceeds the threshold value, usually the threshold value can be set to 110°C - 120°C, the over-temperature alarm indicator light 5 will be lit to form a warning, that is, the over-temperature alarm indicator light 5 is lit to form a prominent red warning. At the same time, it will synchronously control the energy-saving circuit board 8 to turn off the coil current of the high-voltage DC relay and disconnect the load circuit, playing a role in protecting the circuit and reducing the occurrence of circuit failures, and synchronously outputting an alarm signal through the over-temperature signal output wire 4, so as to achieve the purpose of safe use.

[0021] Meanwhile, the coil power-on indicator light 6 provided on the energy-saving circuit board 8 can be synchronously lit when the coil of the high-voltage DC relay inputs current. That is, when the coil power-on indicator light 6 is lit, it forms a green light reminder, or when the current is turned off, the coil power-on indicator light 6 is also turned off. Therefore, it can facilitate the operator to intuitively judge the on-off state of the circuit, reduce the possibility of the operator's misoperation when the electricity is on, effectively avoid the occurrence of electric shock accidents, and greatly eliminate potential safety hazards.

[0022] The above are only specific embodiments of the present invention. Those skilled in the art should understand that any structural design equivalent to this embodiment should be included within the protection scope of the present invention.

Claims

1. A safety type high-voltage DC relay, comprising a body (1), two terminal posts (2) arranged outside the body, and an energy-saving circuit board (8) arranged inside the body. The energy-saving circuit board is provided with a coil signal input end (81) and a coil signal output end (84), and is characterized in that A temperature sensor (7) for adjacent terminal (2) installation is provided on the described body (1). The temperature sensor monitors the temperature of the terminal (2) in real time and transmits signals to the temperature signal input terminal (82) on the energy-saving circuit board (8) via a temperature detection line (3); an over-temperature signal output terminal (83) and an over-temperature alarm indicator (5) are provided on the energy-saving circuit board (8). The over-temperature signal output terminal (83) extends out of the body via an over-temperature signal output line (4), and the over-temperature alarm indicator (5) extends out of the body (1) and is exposed.

2. The safety type high-voltage DC relay according to claim 1, wherein When the high-voltage DC relay operates, the temperature sensor (7) monitors that the temperature of the terminal (2) exceeds the threshold value, thereby lighting up the over-temperature alarm indicator (5), and simultaneously controlling the energy-saving circuit board (8) to cut off the coil current of the high-voltage DC relay and disconnect the load circuit. The corresponding over-temperature signal output line (4) outputs an alarm signal synchronously.

3. The safety type high-voltage DC relay according to claim 1, wherein A coil power-on indicator (6) is provided on the energy-saving circuit board (8). The coil power-on indicator extends out of the body (1) and is exposed, and lights up when the coil of the high-voltage DC relay inputs current or turns off when the current is cut off.

4. The safety type high-voltage DC relay according to claim 1, characterized in that The temperature sensor (7) is arranged between two terminals (2) and embedded in epoxy resin.

5. The safety type high voltage DC relay according to claim 3, wherein The over-temperature alarm indicator (5) and the coil power-on indicator (6) are arranged adjacent to each other. The over-temperature alarm indicator (5) is a red indicator, and the coil power-on indicator (6) is a green indicator.

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