Safety indicating device for operating handle of single-beam crane

Abstract

The utility model discloses a safety indicating device for an operating handle of a single-beam crane, which comprises an electrical control box and an operating handle, the electrical control box is connected with the operating handle through a downlead, each action contactor, a control transformer and each connecting terminal are arranged in the electrical control box, each control button and a safety indicating lamp are arranged on the operating handle, and the safety indicating lamp is connected with the operating handle. The control buttons are connected with the corresponding action contactors through the corresponding connecting terminals, an indicating circuit is arranged in the operating handle and connected with the safety indicating lamp, a coil of the main power supply contactor is arranged in the electrical control box, and a normally open contact of the main power supply contactor is arranged on the indicating circuit. The electrical control box is electrified to trigger the main power supply contactor to control the safety indicator lamp to flicker for reminding; according to the utility model, by arranging the safety indicating lamp capable of reminding an operator, a clear indication and operation interface is provided, so that the operator can execute operation more accurately, the safety requirement of power failure when people leave is met, and the accident risk caused by misoperation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to a safety indicating device for an operating handle of a single-beam crane. Background Art

[0002] Single-beam lifting equipment, such as electric hoists and single-beam cranes, are widely used in various indoor and outdoor lifting operations due to their compact structure, easy operation and strong adaptability. However, their safety performance and efficiency depend largely on the electronic control technology used.

[0003] This type of equipment mainly relies on manual operation through an operating handle. Existing lifting equipment operators cannot obtain corresponding safe electricity protection instructions, which greatly increases the risk during operation. Once an operating error or equipment failure occurs, it is easy to cause a safety accident.

[0004] In view of the above-mentioned defects, the inventor of the present invention finally obtained the present invention after a long period of research and practice. Utility Model Content

[0005] In order to solve the above-mentioned technical defects, the technical solution adopted by the utility model is to provide a single-beam crane operating handle safety indication device, including an electrical control box and an operating handle, the electrical control box and the operating handle are connected by a down conductor, the electrical control box is provided with various action contactors, a control transformer and various connecting terminals, the operating handle is provided with various control buttons and safety indicator lights, the control buttons are connected with the corresponding action contactors through the corresponding connecting terminals, the operating handle is provided with an indication circuit connected to the safety indicator light, the coil of the main power contactor is arranged in the electrical control box, the moving and closing contacts of the main power contactor are arranged on the indication circuit, and the electrical control box is energized to trigger the main power contactor to control the safety indicator light to flash for reminder.

[0006] Preferably, the control transformer is configured as a one-input and two-output type, including an input end, a first output end, and a second output end. The input power is input from the input end of the control transformer, the first output end supplies power to the components in the electrical control box, and the second output end is connected to the indication circuit in the operating handle by the down lead via the corresponding connecting terminal for power supply.

[0007] Preferably, the current input by the input end of the control transformer is set to AC380V, the current output by the first output end is set to AC36V, and the current output by the second output end is set to AC12V.

[0008] Preferably, the indicating circuit includes a rectifier bridge, a capacitor and an electronic relay, the second output end of the control transformer is connected to the AC input end of the rectifier bridge, and the DC output end of the rectifier bridge outputs a DC working power supply.

[0009] Preferably, the positive pole of the DC output terminal is connected to the make contact of the main power contactor, the make contact of the main power contactor is connected in series with the break contact of the electronic relay and the capacitor, the make contact of the main power contactor is connected in parallel with the combination contact of the electronic relay and in series with the capacitor, the safety indicator light is connected in series with the combination contact of the electronic relay, the safety indicator light, the capacitor and the coil of the electronic relay are connected in parallel, and the negative pole of the DC output terminal is connected to the other side of the coil of the electronic relay.

[0010] Preferably, the control transformer adopts BK-380V / 36, 12V dual output.

[0011] Preferably, the rectifier bridge adopts GBU808, the AC input end is an AC12V incoming line, and the DC output end is used to power the indicating circuit.

[0012] Preferably, the capacitor is 1800 μF.

[0013] Preferably, the electronic relay adopts SRD-12VDC-SL-C, and the internal resistance of the coil of the electronic relay is ≮700Ω.

[0014] Preferably, the safety indicator light adopts a specification of 6V / 60mA.

[0015] Compared with the prior art, the beneficial effect of the present invention is that: by setting the safety indicator light that can remind the operator, the present invention provides a clear instruction and operation interface, so that the operator can perform the operation more accurately, meet the safety requirement of power outage when people leave, and reduce the risk of accidents caused by misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural view of the safety indicator device for the operating handle of the single-beam crane;

[0017] Figure 2 A circuit diagram of the indicating circuit;

[0018] Figure 3 This is a structural view of the operating handle.

[0019] The numbers in the figure represent:

[0020] 1-Electrical control box; 2-Main power contactor; 3-Control transformer; 4-Connection terminal; 5-Down lead; 6-Operating handle; 7-Action contactor; 8-Rectifier bridge; 9-Electronic relay; 10-Capacitor; 11-Safety indicator light; 12-Emergency stop button; 13-Start button; 14-Stop button; 15-Up button; 16-Down button; 17-Trolley left button; 18-Trolley right button; 19-Cart forward button; 20-Cart reverse button; 21-Make contact; 91-Break contact; 92-Combination contact. DETAILED DESCRIPTION

[0021] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0022] Embodiment 1

[0023] like Figure 1 As shown, Figure 1 The structural view of the safety indicator device for the operating handle of the single-beam crane. The safety indicator device for the operating handle of the single-beam crane of the utility model comprises an electrical control box 1 and an operating handle 6, wherein the electrical control box 1 and the operating handle 6 are connected via a down conductor 5, wherein the electrical control box 1 is provided with various action contactors 7, a control transformer 3 and various connection terminals 4, wherein the operating handle 6 is provided with various control buttons and a safety indicator light 11, wherein the control button is connected with the corresponding action contactor 7 via the corresponding connection terminal 4 to realize the corresponding action control, wherein the safety indicator light 11 flashes to remind the electrical control box 1 to power on the crane, wherein the operating handle 6 is provided with an indication circuit connected to the safety indicator light 11, wherein the coil of the main power contactor 2 is provided in the electrical control box 1, wherein the moving contact 21 of the main power contactor 2 is provided on the indication circuit, wherein the electrical control box 1 is powered on to trigger the main power contactor 2 to control the safety indicator light 11 to flash for reminder.

[0024] like Figure 3 As shown, Figure 3 This is a structural view of the operating handle; the control buttons include an emergency stop button 12, a start button 13, a stop button 14, an up button 15, a down button 16, a trolley left button 17, a trolley right button 18, a truck forward button 19, and a truck reverse button 20, which are used to control the crane's emergency stop, start, stop, up, down, trolley left, trolley right, truck forward, and truck reverse operations respectively.

[0025] Generally, the safety indicator light 11 is installed on the panel of the operating handle 6 and is located below the emergency stop button 12 .

[0026] The utility model guides the operator to safely operate the equipment for hoisting operations. When the "start button" of the operating handle 6 is pressed, an obvious safety indicator light 11 is provided on the handle, indicating that "the single-beam lifting equipment has power and can be operated"; when the operation is finished, the flashing safety indicator light 11 reminds the operator to perform a power-off operation. When the "stop button" or "emergency stop button" of the operating handle 6 is pressed, the safety indicator light 11 on the handle stops flashing, indicating that "the single-beam lifting equipment has been powered off and cannot be operated", thereby preventing misoperation by irrelevant personnel and greatly improving the safe operation performance of the single-beam crane.

[0027] The utility model provides clear instructions and operation interface, so that operators can perform operations more accurately, meet the safety requirements of power outage when people leave, and reduce the risk of accidents caused by misoperation.

[0028] The utility model provides real-time operation instructions, which can help operators complete work tasks faster and more accurately, thereby improving work efficiency and production benefits. At the same time, since the utility model can reduce the risk of accidents, it can reduce the insurance cost of the crane and save a certain amount of cost for the lifting operation.

[0029] Having 6 safety indicator devices on the operating handle of a single beam crane has advantages in safety performance, can attract more customers and business, and thus enhances market competitiveness.

[0030] Embodiment 2

[0031] like Figure 2 As shown, Figure 2 It is a circuit diagram of the indicating circuit; the control transformer 3 is configured as a one-input and two-output type, including an input end, a first output end and a second output end. The input power is input from the input end of the control transformer 3, the first output end is the power supply for the components in the electrical control box 1, and the second output end is connected to the indicating circuit in the operating handle 6 through the corresponding connecting terminal 4 by the down lead 5 for power supply.

[0032] The current input by the input end of the control transformer 3 is generally set to AC380V, the current output by the first output end is generally set to AC36V, and the current output by the second output end is generally set to AC12V.

[0033] The indicating circuit comprises a rectifier bridge 8, a capacitor 10 and an electronic relay 9. The second output end of the control transformer 3 is connected to the AC input end of the rectifier bridge 8, and the DC output end of the rectifier bridge 8 outputs a DC working power supply.

[0034] Among them, the positive pole of the DC output end is connected to the make contact 21 of the main power contactor 2, the make contact 21 of the main power contactor 2 is connected in series with the break contact 91 of the electronic relay 9 and the capacitor 10, the make contact 21 of the main power contactor 2 is connected in parallel with the combination contact 92 of the electronic relay 9 and in series with the capacitor 10, the safety indicator light 11 is connected in series with the combination contact 92 of the electronic relay 9, the safety indicator light 11, the capacitor 10 and the coil of the electronic relay 9 are connected in parallel, and the negative pole of the DC output end is connected to the other side of the coil of the electronic relay 9.

[0035] Specifically, the control transformer 3 uses BK-380V / 36, 12V dual output; the rectifier bridge 8 uses GBU808, the AC side is AC12V incoming line, and the DC side is used to power the indication circuit; the capacitor 10 uses 1800μF, which is used for charging and discharging the safety indicator light 11; the electronic relay 9 uses SRD-12VDC-SL-C, which is the control device of the indication circuit, and its coil internal resistance ≮700Ω; the safety indicator light 11 uses 6V / 60mA specification to complete the flashing indication function.

[0036] As shown in the following table, the following table is the equipment table and material table.

[0037]

[0038] When the user uses it, when the start button 13 in the operating handle 6 is pressed, the coil of the main power contactor 2 in the electrical control box 1 is electrically attracted, the moving contact 21 of the main power contactor 2 is closed, the capacitor 10 is charged, and a large charging current begins to pass through the coil of the electronic relay, the moving contact 91 of the electronic relay 9 is attracted, and the combination contact 92 of the electronic relay 9 is closed. At this time, the capacitor 10 continues to charge, and the current gradually decreases, so that the electronic relay 9 is released, and the contacts of the electronic relay 9 are immediately reset, and the capacitor 10 is discharged through the safety indicator light 11, and the safety indicator light 11 is on. After the capacitor 10 is discharged, another cycle starts again; when the stop button 14 or the emergency stop button 12 of the operating handle is pressed, the coil of the main power contactor 2 in the electrical control box 1 loses power and is released, the moving contact 21 of the main power contactor is opened, the indication circuit loses power, and the safety indicator light 11 is off.

[0039] The above is only a preferred embodiment of the utility model, which is only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences can be made within the spirit and scope defined by the claims of the utility model, but they will all fall within the scope of protection of the utility model.

Claims

1. A single-beam crane operating handle safety indicator device, characterized in that: It includes an electrical control box and an operating handle, which are connected by a down conductor. The electrical control box is provided with various action contactors, a control transformer and various connection terminals. The operating handle is provided with various control buttons and safety indicator lights. The control buttons are connected to the corresponding action contactors through the corresponding connection terminals. The operating handle is provided with an indication circuit connected to the safety indicator light. The coil of the main power contactor is arranged in the electrical control box, and the moving contact of the main power contactor is arranged on the indication circuit. When the electrical control box is powered on, it triggers the main power contactor to control the safety indicator light to flash for reminder.

2. The single-beam crane operating handle safety indicator device according to claim 1, characterized in that: The control transformer is configured as a one-input and two-output type, including an input end, a first output end, and a second output end. The input power is input from the input end of the control transformer, the first output end supplies power to the components in the electrical control box, and the second output end is connected to the indicating circuit in the operating handle by the down lead via the corresponding connecting terminal for power supply.

3. The single-beam crane operating handle safety indicator device according to claim 2, characterized in that: The current input to the input end of the control transformer is set to AC380V, the current output from the first output end is set to AC36V, and the current output from the second output end is set to AC12V.

4. The single-beam crane operating handle safety indicator device according to claim 2, characterized in that: The indicating circuit comprises a rectifier bridge, a capacitor and an electronic relay. The second output end of the control transformer is connected to the AC input end of the rectifier bridge, and the DC output end of the rectifier bridge outputs a DC working power supply.

5. The single-beam crane operating handle safety indicator device according to claim 4, characterized in that: The positive pole of the DC output terminal is connected to the make contact of the main power contactor, the make contact of the main power contactor is connected in series with the break contact of the electronic relay and the capacitor, the make contact of the main power contactor is connected in parallel with the combination contact of the electronic relay and in series with the capacitor, the safety indicator light is connected in series with the combination contact of the electronic relay, the safety indicator light, the capacitor and the coil of the electronic relay are connected in parallel, and the negative pole of the DC output terminal is connected to the other side of the coil of the electronic relay.

6. The single-beam crane operating handle safety indicator device according to claim 5, characterized in that: The control transformer adopts BK-380V / 36, 12V dual output.

7. The single-beam crane operating handle safety indicator device according to claim 5, characterized in that: The rectifier bridge adopts GBU808, the AC input end is an AC12V incoming line, and the DC output end is used to power the indicating circuit.

8. The single-beam crane operating handle safety indicator device according to claim 5, characterized in that: The capacitor is 1800 μF.

9. The single-beam crane operating handle safety indicator device according to claim 5, characterized in that: The electronic relay adopts SRD-12VDC-SL-C, and the internal resistance of the coil of the electronic relay is ≮700Ω.

10. The single-beam crane operating handle safety indicator device according to claim 5, characterized in that: The safety indicator light adopts 6V / 60mA specification.

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