Intermediate frequency furnace time-sharing start-stop device

Abstract

The utility model provides a time-sharing starting and stopping device for an intermediate frequency furnace, which comprises a control mechanism connected with the intermediate frequency furnace and capable of controlling the working state of the intermediate frequency furnace; the conduction state control unit is connected with the control mechanism and the intermediate frequency furnace, and the connection state of the control mechanism and the intermediate frequency furnace can be changed by changing the working state of the conduction state control unit; the time control mechanism is connected with the conduction state control unit and can control the working state of the conduction state control unit, economic benefits and equipment performance reliability are improved, installation is convenient, cost is low, the device can be used for indirect time-sharing starting and stopping of large equipment such as the intermediate frequency furnace, and the service life of the intermediate frequency furnace is prolonged. And the device can be used for direct time-sharing start and stop of small equipment, is wide in application field, eliminates personal and equipment potential safety hazards of a conventional scheme, and reduces the labor intensity of operators.

Description

Technical Field

[0001] This utility model relates to the field of medium frequency furnace control, and in particular to a time-sharing start-stop device for a medium frequency furnace. Background Technology

[0002] There are two conventional schemes for the time-sharing start-stop control of intermediate frequency furnaces. The first is to interfere with the disconnection of the main power switch, and the second is to interfere with the disconnection of the control circuit. Both of these methods have obvious drawbacks. The former poses a great threat to the personal safety of maintenance and construction personnel of the intermediate frequency furnace and is prone to electric shock accidents. Although the latter avoids safety risks, if the operator does not reset the power adjustment setting to zero, the intermediate frequency voltage will rise rapidly after the control power is connected, which will cause a strong impact on the electrical components. Utility Model Content

[0003] The purpose of this invention is to provide a time-sharing start-stop device for medium-frequency furnaces, which eliminates safety hazards to personnel and equipment during the start-up and shutdown of medium-frequency furnaces.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a time-sharing start-stop device for an intermediate frequency furnace, comprising: a control mechanism connected to the intermediate frequency furnace, the control mechanism being able to control the working state of the intermediate frequency furnace; a conduction state control unit connected to the control mechanism and the intermediate frequency furnace, the connection state between the control mechanism and the intermediate frequency furnace being changed by changing the working state of the conduction state control unit; and a timing mechanism connected to the conduction state control unit, the timing mechanism being able to control the working state of the conduction state control unit.

[0005] Furthermore, the conduction state control unit includes an AC contactor, a first changeover switch, and a second changeover switch. The first and second changeover switches are linked and switched. Both the first and second changeover switches have two input terminals and one output terminal. Only one input terminal and one output terminal of both the first and second changeover switches are connected at any given time. The control mechanism is connected to one input terminal of the first changeover switch through the AC contactor. The output terminal of the control mechanism is connected to one input terminal of the second changeover switch. The output terminal of the second changeover switch is connected to the intermediate frequency furnace. When the output terminal of the AC contactor is closed, the input terminal and the output terminal of the first changeover switch connected to the AC contactor are connected.

[0006] Furthermore, the timing control mechanism includes a power supply, a relay, and a timing switch. The power supply is connected to the timing switch, and the power supply is connected to the control terminal of the AC contactor through the relay. The output terminal of the timing switch is connected to the control terminal of the relay. The timing switch can control the working state of the relay, and the relay can control the working state of the AC contactor.

[0007] Furthermore, the time-sharing start / stop device also includes a remote control unit, which is connected to another input terminal of the second transfer switch.

[0008] Furthermore, the time control mechanism also includes a transformer, and the power supply is connected to the time control switch through the transformer.

[0009] Furthermore, the timing mechanism also includes a status display circuit, which is connected to the timing switch and can display the operating status of the relay.

[0010] Furthermore, the model number of the time control switch is KG316.

[0011] Analysis shows that this utility model discloses a time-sharing start-stop device for a medium-frequency furnace. This utility model improves economic efficiency and equipment performance reliability, is easy to install, and has low cost. It can be used for indirect time-sharing start-stop of large equipment such as medium-frequency furnaces, as well as for direct time-sharing start-stop of small equipment. It has a wide range of applications, eliminates the personal and equipment safety hazards of conventional solutions, and reduces the labor intensity of operators. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0013] Figure 1 A structural block diagram of an embodiment of this utility model. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0015] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0016] The accompanying drawings illustrate one or more examples of the present invention. The detailed description uses numerals and letters to refer to features in the drawings. Similar or analogous reference numerals in the drawings and description have been used to refer to similar or analogous parts of the present invention. As used herein, the terms “first,” “second,” “third,” and “fourth,” etc., are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of a single component.

[0017] like Figure 1 As shown, according to an embodiment of the present invention, a time-sharing start-stop device for a medium-frequency furnace is provided, comprising:

[0018] The control mechanism is connected to the intermediate frequency furnace and can control the working status of the intermediate frequency furnace.

[0019] The aforementioned control mechanism is specifically a main control board, which can be a PS1250 model. This main control board is used to control the operation of the medium-frequency furnace. Specifically, a potentiometer is connected to the power adjustment terminal of the main control board for setpoint control. With the potentiometer's resistance adjustment range connected, setpoint adjustments can be made to control the medium-frequency furnace.

[0020] The conduction state control unit is connected to the control mechanism and the intermediate frequency furnace. By changing the working state of the conduction state control unit, the connection state between the control mechanism and the intermediate frequency furnace can be changed.

[0021] The conduction state control unit includes an AC contactor, a first changeover switch, and a second changeover switch. The first and second changeover switches are linked and each has two input terminals and one output terminal. Only one input terminal and one output terminal of each switch are connected at a time. The control mechanism is connected to one input terminal of the first changeover switch via the AC contactor, and its output terminal is connected to one input terminal of the second changeover switch. The output terminal of the second changeover switch is connected to the intermediate frequency furnace. When the output terminal of the AC contactor is closed, the input terminal and output terminal of the first changeover switch connected to the AC contactor are connected. If the output terminal of the AC contactor is not closed, the output terminal of the first changeover switch is connected to the other input terminal.

[0022] An AC contactor includes a coil section (the control terminal of the AC contactor) and a contact section. The contact section of the AC contactor is connected to the main control board and the first changeover switch, while the coil section is connected to a relay. When the relay is closed, the coil is energized, which controls the contact to close, thereby enabling the main control board to supply power to the first changeover switch.

[0023] The first and second changeover switches are linked and switch to each other. When one input and one output of the first changeover switch are closed, the corresponding input and one output of the second changeover switch will also be closed. When the other input and one output of the first changeover switch are closed, the other input and one output of the second changeover switch will also be closed.

[0024] After the first transfer switch receives power from the main control board, the corresponding input and output terminals close, and the corresponding input and output terminals of the second transfer switch close, thereby connecting the output terminal of the main control board with the medium-frequency furnace and realizing the control of the medium-frequency furnace.

[0025] The timing mechanism is connected to the conduction state control unit and can control the working state of the conduction state control unit.

[0026] The time control mechanism includes a power supply, a relay, and a time control switch. The power supply is connected to the time control switch, and the power supply is connected to the control terminal of the AC contactor through the relay. The output terminal of the time control switch is connected to the control terminal of the relay. The time control switch can control the working state of the relay, and the relay can control the working state of the AC contactor. When the time control switch controls the output terminal of the relay to close, the control terminal of the AC contactor is connected to the power supply, and at this time the output terminal of the AC contactor is closed, thereby controlling the working state of the first changeover switch.

[0027] The time control mechanism also includes a transformer, through which the power supply is connected to the time control switch.

[0028] The power supply mentioned above is usually a 220V power supply, which can be converted into a 12V output voltage through a transformer.

[0029] Typically, the power supply is connected to the transformer via a circuit breaker.

[0030] The timing mechanism also includes a status display circuit, which is connected to the timing switch. The status display circuit can display the working status of the relay, and the display circuit can display the working status of the relay by setting indicator lights.

[0031] The aforementioned time control switch is model KG316, and this model of time control switch can meet the usage requirements of time-sharing start-stop devices.

[0032] The time-sharing start / stop device also includes a remote control unit, which is connected to another input terminal of the second changeover switch.

[0033] When the AC contactor is disconnected, the other input and output terminals of the first changeover switch are closed, and the corresponding input and output terminals of the second changeover switch are closed, thereby connecting the remote control unit with the medium-frequency furnace and realizing the control of the medium-frequency furnace.

[0034] As can be seen from the above description, the above embodiments of this utility model achieve the following technical effects: This utility model improves economic efficiency and equipment performance reliability; this utility model is easy to install and has low cost; it can be used for indirect time-sharing start-up and shutdown of large equipment such as medium-frequency furnaces, and can also be used for direct time-sharing start-up and shutdown of small equipment; it has a wide range of applications; it eliminates the personal and equipment safety hazards of conventional solutions; and it reduces the labor intensity of operators.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A time-sharing start-stop device for a medium-frequency furnace, characterized in that, include: A control mechanism is connected to the intermediate frequency furnace and is capable of controlling the working state of the intermediate frequency furnace; A conduction state control unit is connected to both the control mechanism and the intermediate frequency furnace. By changing the operating state of the conduction state control unit, the connection state between the control mechanism and the intermediate frequency furnace can be changed. A timing control mechanism is connected to the conduction state control unit, and the timing control mechanism is capable of controlling the working state of the conduction state control unit.

2. The time-sharing start-stop device for a medium-frequency furnace according to claim 1, characterized in that, The conduction state control unit includes an AC contactor, a first changeover switch, and a second changeover switch; The first and second changeover switches are linked and switched. Both the first and second changeover switches have two input terminals and one output terminal. At any given time, only one input terminal and one output terminal of both the first and second changeover switches are connected. The control mechanism is connected to one input terminal of the first changeover switch via the AC contactor, and the output terminal of the control mechanism is connected to one input terminal of the second changeover switch. The output terminal of the second changeover switch is connected to the medium frequency furnace. When the output terminal of the AC contactor is closed, the input terminal of the first changeover switch connected to the AC contactor and the output terminal of the first changeover switch are connected.

3. The time-sharing start-stop device for a medium-frequency furnace according to claim 2, characterized in that, The timing control mechanism includes a power supply, a relay, and a timing switch. The power supply is connected to the timing switch, and the power supply is connected to the control terminal of the AC contactor through the relay. The output terminal of the timing switch is connected to the control terminal of the relay. The timing switch can control the working state of the relay, and the relay can control the working state of the AC contactor.

4. The time-sharing start-stop device for a medium-frequency furnace according to claim 3, characterized in that, The time-sharing start / stop device also includes a remote control unit, which is connected to another input terminal of the second transfer switch.

5. The time-sharing start-stop device for a medium-frequency furnace according to claim 3, characterized in that, The time control mechanism also includes a transformer, and the power supply is connected to the time control switch through the transformer.

6. The time-sharing start-stop device for a medium-frequency furnace according to claim 3, characterized in that, The timing control mechanism also includes a status display circuit, which is connected to the timing switch and can display the working status of the relay.

7. The time-sharing start-stop device for a medium-frequency furnace according to claim 3, characterized in that, The time control switch is model KG316.

Images