A control circuit for an electric rail clipper

Abstract

The utility model discloses a control circuit of electric rail clamp, including rail clamp motor positive rotation circuit, rail clamp motor reverse rotation circuit and control loop, the control loop includes rail clamp open control loop and rail clamp close control loop, and rail clamp open control loop series relay K10, the normally closed contact of relay K20 and rail clamp open switch SB1, and rail clamp close control loop series relay K20, the normally closed contact of relay K10 and rail clamp close switch SB2, and rail clamp motor positive rotation circuit series the normally open contact of relay K10, and rail clamp motor reverse rotation circuit series relay K20 normally open contact, the utility model discloses through the open and close of rail clamp two button can realize the function that rail clamp automatic open and automatic close, and the crane is locked safely to the rail clamp automatic open and automatic close control interlock, ensure the operation safety, and still provide the signal of open to position and close to position for the control of indicating lamp, remind operating personnel.

Description

Technical Field

[0001] This utility model relates to the field of crane control technology, specifically to a control circuit for an electric rail clamp. Background Technology

[0002] Rail clamps are crucial safety protection devices for large rail equipment such as cranes. They are primarily used to reliably clamp the crane's rails when not in operation or in strong winds, preventing slippage or overturning accidents caused by wind or other external forces. With the development of automation technology, traditional manual rail clamps have been gradually replaced by electric rail clamps. The latter use a motor to drive the clamping and releasing actions, improving operational convenience and response speed.

[0003] In existing electric rail clamp control systems, the opening and closing of the rail clamp is typically achieved by using buttons to control the motor's forward and reverse rotation. However, existing control systems have several problems: First, the lack of an effective interlocking mechanism between the rail clamp opening and closing control loops makes them prone to misoperation or circuit interference, causing the motor to rotate in both directions simultaneously. This not only affects the normal operation of the equipment but may also damage electrical components. Second, operators often need to continuously press the button for several seconds until the action is completed when controlling the opening and closing of the rail clamp, which is cumbersome and labor-intensive. Third, the lack of feedback signals indicating whether the rail clamp is fully open or closed makes it impossible for operators to visually determine whether the rail clamp has completed its action, affecting operational efficiency and safety. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a control circuit for an electric rail clamp. The rail clamp can be automatically opened and closed by two buttons, which are reliable, easy to operate and have status feedback function. This improves the automation level and safety performance of the rail clamp control system and can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a control circuit for an electric rail clamp, comprising a rail clamp motor forward rotation circuit, a rail clamp motor reverse rotation circuit, and a control circuit; the control circuit includes a rail clamp opening control circuit and a rail clamp closing control circuit; The rail clamp opening control circuit is connected in series with the normally closed contacts of relays K10 and K20 and the rail clamp opening switch SB1; The rail clamp closing control circuit is connected in series with the normally closed contacts of relays K20 and K10 and the rail clamp closing switch SB2; The forward rotation circuit of the rail clamp motor is connected in series with the normally open contact of relay K10, and the reverse rotation circuit of the rail clamp motor is connected in series with the normally open contact of relay K20.

[0006] Preferably, the rail clamp opening switch SB1 is connected in parallel with the normally open contact of relay K10, and the rail clamp closing switch SB2 is connected in parallel with the normally open contact of relay K20.

[0007] Preferably, the rail clamp opening control circuit is connected in series with a rail clamp opening limit switch SX90, and the rail clamp closing control circuit is connected in series with a rail clamp closing limit switch SX91; the control circuit also includes a feedback control circuit one and a feedback control circuit two, the contacts of the rail clamp opening limit switch SX90 are connected in series with the feedback control circuit one, the contacts of the rail clamp closing limit switch SX91 are connected in series with the feedback control circuit two, the feedback control circuit one is connected in series with a relay K01, and the feedback control circuit two is connected in series with a relay K02.

[0008] Preferably, it also includes an indicator light circuit, wherein indicator light one of the indicator light circuit is connected in series with the normally open contact of relay K01, and indicator light two of the indicator light circuit is connected in series with the normally open contact of relay K02.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the two buttons for opening and closing the rail clamp can realize the automatic opening and closing function of the rail clamp, which can safely lock the crane. Moreover, the automatic opening and closing control of the rail clamp is interlocked to ensure operational safety. At the same time, it also provides signals for opening and closing to control the indicator lights, reminding the operator and improving the automation level and safety performance of the rail clamp control system. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the motor circuit of the rail clamp of this utility model; Figure 2 This is a schematic diagram of the control circuit of this utility model; Figure 3 This is a schematic diagram of the indicator light circuit of this utility model.

[0011] In the diagram: 1 Rail clamp motor forward rotation circuit, 2 Rail clamp motor reverse rotation circuit, 3 Rail clamp opening control circuit, 4 Rail clamp closing control circuit, 5 Feedback control circuit one, 6 Feedback control circuit two, 7 Indicator light circuit. Detailed Implementation

[0012] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0013] Please see Figure 1-3The present invention provides the following technical solution: Example 1: A control circuit for an electric rail clamp includes a rail clamp motor forward rotation circuit 1, a rail clamp motor reverse rotation circuit 2, and a control circuit; the control circuit includes a rail clamp opening control circuit 3 and a rail clamp closing control circuit 4. The rail clamp opening control circuit 3 is connected in series with the normally closed contacts of relays K10 and K20 and the rail clamp opening switch SB1; The rail clamp closing control circuit 4 is connected in series with the normally closed contacts of relays K20 and K10 and the rail clamp closing switch SB2; The rail clamp motor forward rotation circuit 1 is connected in series with the normally open contact of relay K10, and the rail clamp motor reverse rotation circuit 2 is connected in series with the normally open contact of relay K20. It is understandable that pressing the rail clamp open switch SB1 energizes relay K10, which in turn energizes the rail clamp open control circuit 3. This closes the normally open contact of relay K10 in the rail clamp motor forward rotation circuit 1, energizing the rail clamp motor and causing it to rotate forward. The rail clamp then begins to clamp the rail. Similarly, pressing the rail clamp open switch SB2 energizes relay K20, which in turn energizes the rail clamp close control circuit 4. This closes the normally open contact of relay K20 in the rail clamp motor reverse rotation circuit 2, energizing the rail clamp motor and causing it to rotate in reverse. The rail clamp then begins to release the rail. These two buttons enable automatic opening and closing of the rail clamp, providing a safe locking mechanism for the crane. It should be noted that the normally closed contact of the relay K20 in series in the rail clamp opening control circuit 3 is connected to the normally closed contact of the relay K10 in series in the rail clamp closing control circuit 4. That is, when the rail clamp opening control circuit 3 is energized, the rail clamp closing control circuit 4 is de-energized, and when the rail clamp closing control circuit 4 is energized, the rail clamp opening control circuit 3 is de-energized. This interlocking control ensures that the two circuits do not interfere with each other.

[0014] Example 2: Unlike Example 1, the rail clamp opening switch SB1 is connected in parallel with the normally open contact of relay K10, and the rail clamp closing switch SB2 is connected in parallel with the normally open contact of relay K20. That is, when the rail clamp opening switch SB1 is jogged, relay K10 is energized, the normally open contact of relay K10 is closed, the rail clamp opening control circuit 3 is energized, and self-locking is achieved, so the rail clamp opening switch SB1 can be released without the operator having to press the rail clamp opening switch SB1 for about 4 seconds. Similarly, the rail clamp closing switch SB2 is also energized, reducing the operator's burden.

[0015] Example 3: Unlike Example 1, the rail clamp opening control circuit 3 is connected in series with a rail clamp opening limit switch SX90, and the rail clamp closing control circuit 4 is connected in series with a rail clamp closing limit switch SX91. The control circuit also includes a feedback control circuit 1 5 and a feedback control circuit 2 6. The contacts of the rail clamp opening limit switch SX90 are connected in series with the feedback control circuit 1 5, and the contacts of the rail clamp closing limit switch SX91 are connected in series with the feedback control circuit 2 6. The feedback control circuit 1 5 is connected in series with a relay K01, and the feedback control circuit 2 6 is connected in series with a relay K02. It also includes indicator light circuit 7, indicator light one of indicator light circuit 7 is connected in series with the normally open contact of relay K01, and indicator light two of indicator light circuit 7 is connected in series with the normally open contact of relay K02. Pressing the rail clamp open switch SB1 energizes the rail clamp open control circuit 3. After the rail clamp is fully open, the rail clamp closed limit switch SX91 activates and energizes the feedback control circuit 5. Relay K01 is energized, and its normally open contact closes, causing indicator light 1 in indicator light circuit 7 to light up, indicating to the operator that the rail clamp is fully open. Similarly, pressing the rail clamp close switch SB2 also triggers a feedback signal to light up indicator light 2, indicating to the operator that the rail clamp is fully closed, facilitating operation.

[0016] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents in the content of this utility model.

Claims

1. A control circuit for an electric rail clamp, characterized in that: It includes a rail clamp motor forward rotation circuit (1), a rail clamp motor reverse rotation circuit (2), and a control circuit; the control circuit includes a rail clamp opening control circuit (3) and a rail clamp closing control circuit (4). The rail clamp opening control circuit (3) is connected in series with the normally closed contacts of relays K10 and K20 and the rail clamp opening switch SB1; The rail clamp closing control circuit (4) is connected in series with the normally closed contacts of relays K20 and K10 and the rail clamp closing switch SB2; The forward rotation circuit (1) of the rail clamp motor is connected in series with the normally open contact of relay K10, and the reverse rotation circuit (2) of the rail clamp motor is connected in series with the normally open contact of relay K20.

2. The control circuit for an electric rail clamp according to claim 1, characterized in that: The rail clamp opening switch SB1 is connected in parallel with the normally open contact of relay K10, and the rail clamp closing switch SB2 is connected in parallel with the normally open contact of relay K20.

3. The control circuit for an electric rail clamp according to claim 1, characterized in that: The rail clamp opening control circuit (3) is connected in series with a rail clamp opening limit switch SX90, and the rail clamp closing control circuit (4) is connected in series with a rail clamp closing limit switch SX91; the control circuit also includes a feedback control circuit one (5) and a feedback control circuit two (6). The contacts of the rail clamp opening limit switch SX90 are connected in series with the feedback control circuit one (5), and the contacts of the rail clamp closing limit switch SX91 are connected in series with the feedback control circuit two (6). The feedback control circuit one (5) is connected in series with a relay K01, and the feedback control circuit two (6) is connected in series with a relay K02.

4. The control circuit of the electric rail clamp according to claim 3, characterized in that: It also includes an indicator light circuit (7), the normally open contact of indicator light one in series relay K01 of indicator light circuit (7), and the normally open contact of indicator light two in series relay K02 of indicator light circuit (7).

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