An explosion-proof operating column for switching on and off the power and control lines of electrical equipment

Abstract

The utility model provides a kind of explosion-proof operating column of on-site on-off electrical equipment power and control circuit, including change-over switch, the change-over switch includes upper contact and lower contact, the upper contact intercommunication is set first control loop, the lower contact intercommunication is set second control loop, the first control loop and second control loop are connected in parallel;The first control loop includes the remote control start-stop switch that can be passed through system intercommunication with the upper contact;The second control loop includes the stop button intercommunication with the lower contact, the start button in series with stop button, the relay that is connected in parallel with start button is set.The explosion-proof operating column of on-site on-off electrical equipment power and control circuit can avoid that electrical equipment is not powered off personnel misoperation causes equipment damage or personnel injury.

Description

Technical Field

[0001] This utility model relates to the technical field of local switching of electrical equipment, and in particular to an explosion-proof operating column for the power and control circuits of local switching of electrical equipment. Background Technology

[0002] Existing electrical equipment operating columns typically only have the function of starting and stopping electrical control circuits. When operating the equipment, personnel need to go to the power distribution room to disconnect and restore power, which not only increases the workload, but also makes it easy for unsafe situations to occur due to personnel forgetting to disconnect power.

[0003] Electrical equipment control columns typically only have buttons for stopping and starting the motor. The electrical circuit diagram is as follows. Figure 1 As shown, the stop button SB1 is normally closed, and the start button SB2 is normally open. When SB2 is pressed, relay KM is energized, and KM1 below closes, allowing the motor to start normally. The existing operating column electrical circuit only has motor start / stop functions, which cannot prevent accidental motor start. Power outages in the power distribution room require operators to travel back and forth between the work site and the power distribution room, which is labor-intensive and prone to forgetting; modifying the automatic control interlock function is difficult and costly.

[0004] Therefore, there is an urgent need to provide an explosion-proof operating column for locally switching on and off the power and control circuits of electrical equipment to solve the problems existing in the prior art. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an explosion-proof operating column for locally switching on and off the power and control circuits of electrical equipment. This explosion-proof operating column can switch on and off the power and control circuits of electrical equipment on-site, preventing equipment damage or personal injury caused by personnel misoperation while the equipment is powered on.

[0006] This utility model provides an explosion-proof operating column for locally switching on and off the power and control circuits of electrical equipment, including a changeover switch. The changeover switch includes an upper contact and a lower contact. The upper contact is connected to a first control circuit, and the lower contact is connected to a second control circuit. The first control circuit and the second control circuit are connected in parallel. The first control circuit includes a start / stop switch that can be remotely controlled by the system and is connected to the upper contact. The second control circuit includes a stop button connected to the lower contact, a start button connected in series with the stop button, and a relay connected in parallel with the start button.

[0007] Preferably, after the pump stops, the selector switch is turned to the stop state, and neither the upper nor lower contact is closed.

[0008] Preferably, when the selector switch is turned to the upper contact and the upper contact is closed, it can be remotely controlled via the system remote control start / stop switch.

[0009] Preferably, when the changeover switch is turned to the local state, the lower contact is closed, the start button is pressed on-site, the relay is energized, and the stop button is pressed, the second circuit is disconnected.

[0010] Preferably, the stop button is a normally closed switch.

[0011] Preferably, the start button is a normally open switch.

[0012] Beneficial effects

[0013] This invention provides an explosion-proof operating column for locally controlling the power and control circuits of electrical equipment. The circuit can be controlled remotely, stopped, or locally. This effectively prevents unsafe situations caused by personnel forgetting to disconnect the power. The on-site operation switch controls the electrical circuit before and after use of the electrical equipment, reducing the workload of personnel going to the power distribution room to disconnect power.

[0014] Compared to automatic control interlocking system upgrades, this utility model is easier and cheaper to upgrade. Automatic control interlocking systems require multiple nodes such as PLC, host computer, and automatic control program, resulting in a high probability of failure and a complicated troubleshooting process. This utility model, on the other hand, is simple to troubleshoot and facilitates later maintenance. Attached Figure Description

[0015] Figure 1 This is a circuit diagram of the prior art;

[0016] Figure 2 This is the circuit diagram of this utility model;

[0017] Among them, SA1 is a changeover switch; KB1 is a system remote control start / stop switch; SB2 is a stop button; SB1 is a start button; and KA1 is a relay. Detailed Implementation

[0018] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0019] Reference Figure 2

[0020] This utility model provides an explosion-proof operating column for locally switching on and off the power and control circuits of electrical equipment, including a changeover switch SA1. The changeover switch SA1 includes an upper contact and a lower contact. The upper contact is connected to a first control circuit, and the lower contact is connected to a second control circuit. The first control circuit and the second control circuit are connected in parallel. The first control circuit includes a start / stop switch KB1 connected to the upper contact and capable of being remotely controlled by the system. The second control circuit includes a stop button SB2 connected to the lower contact, a start button SB1 connected in series with the stop button SB2, and a relay KA1 connected in parallel with the start button SB1.

[0021] In one embodiment, after the pump is stopped, the changeover switch SA1 is rotated to the stop state, and neither the upper nor lower contact is closed. Even if the operator accidentally operates or touches the start button SB1, the electrical equipment will not be activated, thus improving safety.

[0022] In one embodiment, the selector switch SA1 is rotated to a remote state, whereby the selector switch SA1 is rotated to the upper contact, and the upper contact is closed. This can be remotely controlled by the system remote control start / stop switch KB1.

[0023] In one embodiment, the selector switch SA1 is turned to the local state, the lower contact is closed, the start button SB1 is pressed on site, the relay KA1 is energized, and the stop button SB2 is pressed, the second circuit is disconnected.

[0024] In one embodiment, the stop button SB2 is a normally closed switch.

[0025] In one embodiment, the start button SB1 is a normally open switch.

[0026] Beneficial effects

[0027] This invention provides an explosion-proof operating column for locally switching on and off the power and control circuits of electrical equipment. The circuit can be controlled remotely, stopped, or locally. This effectively prevents unsafe situations caused by personnel forgetting to disconnect the power. The on-site operation transfer switch SA1 controls the electrical circuit before and after use of the electrical equipment, reducing the workload of personnel going to the power distribution room to disconnect the power.

[0028] Compared to automatic control interlocking system upgrades, this utility model is easier and cheaper to upgrade. Automatic control interlocking systems require multiple nodes such as PLC, host computer, and automatic control program, resulting in a high probability of failure and a complicated troubleshooting process. This utility model, on the other hand, is simple to troubleshoot and facilitates later maintenance.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention.

Claims

1. An explosion-proof operating column for locally switching on and off power and control circuits of electrical equipment, characterized in that, The system includes a selector switch, which has an upper contact and a lower contact. The upper contact is connected to a first control circuit, and the lower contact is connected to a second control circuit. The first and second control circuits are connected in parallel. The first control circuit includes a start / stop switch that can be remotely controlled by the system and is connected to the upper contact. The second control circuit includes a stop button that is connected to the lower contact, a start button connected in series with the stop button, and a relay connected in parallel with the start button.

2. The explosion-proof operating column for locally switching on and off power and control circuits of electrical equipment according to claim 1, characterized in that: After the pump stops, the selector switch is turned to the stop state, and neither the upper nor lower contact is closed.

3. The explosion-proof operating column for locally switching on and off power and control circuits of electrical equipment according to claim 1, characterized in that: When the selector switch is turned to the upper contact, the upper contact closes, and the start / stop switch can be remotely controlled via the system.

4. The explosion-proof operating column for locally switching on and off power and control circuits of electrical equipment according to claim 1, characterized in that: When the changeover switch is turned to the local position, the lower contact closes. When the start button is pressed on-site, the relay is energized. When the stop button is pressed, the second circuit is disconnected.

5. The explosion-proof operating column for locally switching on and off power and control circuits of electrical equipment according to claim 1, characterized in that: The stop button is a normally closed switch.

6. The explosion-proof operating column for locally switching on and off power and control circuits of electrical equipment according to claim 1, characterized in that: The start button is a normally open switch.

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