Portable time relay checking circuit and device

Abstract

The utility model relates to the technical field of relay verification, in particular to a portable time relay verification circuit and device. Comprising a timer, a first intermediate relay, a second intermediate relay, a first selection switch, a second selection switch, a third selection switch, a direct current voltmeter, a power switch, a start button, a reset button, a power indicating lamp and a power module. According to the utility model, through different combinations of the three selection switches, verification of eight different types of time relays is realized by using the two intermediate relays, the structure is simple, the integration is good, the cost is low, and the verification capability of the time relay during the ship navigation period is improved.

Description

Technical Field

[0001] The present application relates to the technical field of relay calibration, and in particular to a portable time relay calibration circuit and device. Background Art

[0002] Various types of time relays are used in some of a ship's electrical control systems to implement logical control functions for certain systems or electrical equipment. During routine inspection, maintenance, and repair of electrical control systems, specialized instruments are required to check and calibrate the time delay performance of time relays. Most time relay calibration devices currently on the market only calibrate a specific type of time relay, resulting in poor integration. A few multifunctional calibration devices utilize single-chip microcomputers to calibrate multiple types of time relays. These devices are expensive and have poor maintainability, making them difficult to repair if a calibration device malfunctions while the ship is at sea. Utility Model Content

[0003] Based on this, it is necessary to provide a portable time relay calibration circuit and device to address the above-mentioned background technical problems. Compared with traditional time relay calibration devices, it can improve maintainability while having high integration, and has a simple structure and is easy to carry.

[0004] To achieve the above-mentioned purpose, the utility model provides a portable time relay calibration circuit, including a timer, a first intermediate relay, a second intermediate relay, a first selection switch, a second selection switch, a third selection switch, a DC voltmeter, a power switch, a start button, a reset button, a power indicator light and a power module.

[0005] The signal line of the timer is connected to the normally open contact of the first intermediate relay and the third selection switch, and the power supply line of the timer is connected to the power input terminal.

[0006] The contact terminals of the first intermediate relay are connected to the first selection switch, the second selection switch, and the third selection switch. The two ends of the coil of the first intermediate relay are connected to the power input terminal through the start button and the stop button respectively; the normally open contact terminal of the first intermediate relay is connected in parallel with the start button.

[0007] The contact terminals of the second intermediate relay are connected to the second selection switch and the third selection switch; the two ends of the coil of the second intermediate relay are connected to the coil of the time relay to be verified and the power supply.

[0008] The first selection switch includes an AC gear and a DC gear; when the first selection switch selects the AC gear, the time relay coil to be verified is connected to the power input end; when the first selection switch selects the DC gear, the time relay coil to be verified is connected to the output end of the power module.

[0009] The second selection switch includes a power-on delay position and a power-off delay position.

[0010] The third selection switch includes a normally closed contact position and a normally open contact position.

[0011] When the second selection switch selects the power-on delay position, the time relay coil to be verified is connected to the normally open contact terminal of the first intermediate relay, the normally open contact terminal of the second intermediate relay is connected to the normally closed contact position of the third selection switch, and the normally closed contact terminal of the second intermediate relay is connected to the normally open contact position of the third selection switch.

[0012] When the second selection switch selects the power-off delay position, the time relay coil to be verified is connected to the normally closed contact terminal of the first intermediate relay, the normally closed contact terminal of the second intermediate relay is connected to the normally closed contact position of the third selection switch, and the normally open contact terminal of the second intermediate relay is connected to the normally open contact position of the third selection switch.

[0013] The power module input end is connected to the power input end, and the power module output end is connected to the DC gear of the first selection switch, for supplying DC power to the coil of the time relay to be checked.

[0014] The DC voltmeter input terminal is connected to the power input terminal, and the voltage signal line of the DC voltmeter is connected to the DC gear of the first selection switch, which is used to measure the voltage across the coil of the time relay to be checked.

[0015] The power indicator light is connected to the power input terminal and is used to indicate the on / off status of the power input.

[0016] Optionally, the portable time relay verification circuit further includes a DC power indicator light, which is connected to the DC position of the first selection switch.

[0017] Optionally, the portable time relay verification circuit further includes an emergency stop button, which is connected in series to the output end of the power switch.

[0018] In addition, to achieve the above-mentioned purpose, the present invention also proposes a portable time relay calibration device, which includes the portable time relay calibration circuit described above.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The portable time relay calibration circuit and device in the embodiment of the utility model realizes calibration of eight different types of time relays by using two intermediate relays through different combinations of three selection switches. It has a simple structure, good integration, low cost, and improves the calibration capability of time relays during ship navigation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0022] Figure 1 A circuit schematic diagram of a specific example of a portable time relay calibration circuit in an embodiment of the present utility model;

[0023] Figure 2 This is a functional block diagram of a specific example of a portable time relay calibration circuit in an embodiment of the present utility model;

[0024] Figure 3 This is a front panel diagram of a specific example of a portable time relay calibration device in an embodiment of the present utility model.

[0025] Reference numerals:

[0026] 21-first selection switch SA2, 22-second selection switch SA3, 23-third selection switch SA4, 31-first intermediate relay K1, 32-second intermediate relay K2, 40-power module TB, 41-start button SB1, 42-reset button SB2, 43-emergency stop button SB3, 44-power indicator light HL1, 45-DC power indicator light HL2, 46-DC voltmeter, 50-timer. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. It should be noted that in the description of the present application, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] The term "multiple" in the embodiments of the present application refers to two or more. The term "connected" in the embodiments of the present application refers to various connection methods such as direct connection or indirect connection to achieve communication between devices, and the embodiments of the present application do not impose any limitation on this.

[0029] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] The embodiments of the present application are described below with reference to the accompanying drawings.

[0031] See also Figures 1 to 3 The verification circuit includes a timer (50), a first intermediate relay K1 (31), a second intermediate relay K2 (32), a first selection switch SA2 (21), a second selection switch SA3 (22), a third selection switch SA4 (23), a DC voltmeter (46), a power switch SA1 (20), a start button SB1 (41), a reset button SB2 (42) and a power module TB (40).

[0032] The signal line of the timer (50) is connected to the normally open contact of the first intermediate relay K1 (31) and the third selection switch SA4 (23), and the power supply line of the timer (50) is connected to the power input terminal.

[0033] The contact terminals of the first intermediate relay K1 (31) are connected to the first selection switch SA2 (21), the second selection switch SA3 (22), and the third selection switch SA4 (23); the two ends of the coil of the first intermediate relay K1 (31) are connected to the power input terminal through the start button SB1 (41) and the stop button respectively; the normally open contact terminal of the first intermediate relay K1 (31) is connected in parallel with the start button SB1 (41).

[0034] The contact terminals of the second intermediate relay K2 (32) are connected to the second selection switch SA3 (22) and the third selection switch SA4 (23); the two ends of the coil of the second intermediate relay K2 (32) are connected to the coil of the time relay to be checked and the power supply.

[0035] The first selection switch SA2 (21) includes an AC gear and a DC gear; when the first selection switch SA2 (21) selects the AC gear, the time relay coil to be verified is connected to the power input end; when the first selection switch SA2 (21) selects the DC gear, the time relay coil to be verified is connected to the output end of the power module TB (40).

[0036] The second selection switch SA3 (22) includes a power-on delay position and a power-off delay position.

[0037] The third selection switch SA4 (23) includes a normally closed contact position and a normally open contact position.

[0038] When the second selection switch SA3 (22) selects the power-on delay position, the time relay coil to be verified is connected to the normally open contact terminal of the first intermediate relay K1 (31), the normally open contact terminal of the second intermediate relay K2 (32) is connected to the normally closed contact position of the third selection switch SA4 (23), and the normally closed contact terminal of the second intermediate relay K2 (32) is connected to the normally open contact position of the third selection switch SA4 (23).

[0039] When the second selection switch SA3 (22) selects the power-off delay position, the time relay coil to be verified is connected to the normally closed contact terminal of the first intermediate relay K1 (31), the normally closed contact terminal of the second intermediate relay K2 (32) is connected to the normally closed contact position of the third selection switch SA4 (23), and the normally open contact terminal of the second intermediate relay K2 (32) is connected to the normally open contact position of the third selection switch SA4 (23).

[0040] The input end of the power module TB (40) is connected to the power input end, and the output end of the power module TB (40) is connected to the DC gear of the first selection switch SA2 (21) for supplying DC power to the coil of the time relay to be checked.

[0041] The input end of the DC voltmeter (46) is connected to the power input end, and the voltage signal line of the DC voltmeter (46) is connected to the DC gear of the first selection switch SA2 (21) for measuring the voltage across the coil of the time relay to be checked.

[0042] The power indicator light HL1 (44) is connected to the power input terminal and is used to indicate the on / off state of the power input.

[0043] Optionally, the portable time relay verification circuit further comprises a DC power indicator light HL2 (45), wherein the DC power indicator light HL2 (45) is connected to the DC position of the first selection switch SA2 (21).

[0044] Optionally, the portable time relay verification circuit further comprises an emergency stop button SB3 (43), and the emergency stop button SB3 (43) is connected in series to the output end of the power switch SA1 (20).

[0045] like Figure 3 To achieve the above-mentioned objectives, the present invention further provides a portable time relay calibration device, comprising the portable time relay calibration circuit described above. The device is configured with various switches, indicator lights, and instruments arranged to facilitate operation, and is equipped with corresponding prompt and warning lights.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A portable time relay calibration circuit, characterized in that: include: Timer, first intermediate relay, second intermediate relay, first selector switch, second selector switch, third selector switch, DC voltmeter, power switch, start button, reset button, power indicator light and power module; The signal line of the timer is connected to the normally open contact of the first intermediate relay and the third selection switch, and the power supply line of the timer is connected to the power input terminal; The contact terminals of the first intermediate relay are connected to the first selection switch, the second selection switch, and the third selection switch. The two ends of the coil of the first intermediate relay are connected to the power input terminal via the start button and the stop button, respectively. The normally open contact terminal of the first intermediate relay is connected in parallel with the start button. The contact terminals of the second intermediate relay are connected to the second selection switch and the third selection switch; the two ends of the coil of the second intermediate relay are connected to the coil of the time relay to be verified and the power supply; The first selection switch includes an AC gear and a DC gear; when the first selection switch selects the AC gear, the time relay coil to be verified is connected to the power input end; when the first selection switch selects the DC gear, the time relay coil to be verified is connected to the output end of the power module; The second selection switch includes a power-on delay position and a power-off delay position; The third selection switch includes a normally closed contact position and a normally open contact position; When the second selection switch selects the power-on delay gear, the time relay coil to be verified is connected to the normally open contact terminal of the first intermediate relay, the normally open contact terminal of the second intermediate relay is connected to the normally closed contact gear of the third selection switch, and the normally closed contact terminal of the second intermediate relay is connected to the normally open contact gear of the third selection switch; When the second selection switch selects the power-off delay gear, the coil of the time relay to be verified is connected to the normally closed contact terminal of the first intermediate relay, the normally closed contact terminal of the second intermediate relay is connected to the normally closed contact gear of the third selection switch, and the normally open contact terminal of the second intermediate relay is connected to the normally open contact gear of the third selection switch; The power module input end is connected to the power input end, and the power module output end is connected to the DC gear of the first selection switch, for supplying DC power to the coil of the time relay to be checked; The DC voltmeter input terminal is connected to the power input terminal, and the voltage signal line of the DC voltmeter is connected to the DC gear of the first selection switch, for measuring the voltage across the coil of the time relay to be checked; The power indicator light is connected to the power input terminal and is used to indicate the on / off status of the power input.

2. A portable time relay calibration circuit according to claim 1, characterized in that: It also includes a DC power indicator light, which is connected to the DC gear of the first selection switch.

3. A portable time relay calibration circuit according to any one of claims 1 to 2, characterized in that: It also includes an emergency stop button, which is connected in series to the output end of the power switch.

4. A portable time relay calibration device, characterized in that: The portable time relay verification circuit comprises the portable time relay verification circuit as described in any one of claims 1 to 3.

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