Pulley device for hanging basket

Abstract

A pulley device for a hanging basket comprises a pulley, an alternating-current generator, a rotating speed detection circuit, an electric leakage detection circuit and a rectifying circuit. Shaft rods of the pulleys are located at the outer side ends of the pulley supports, shells of the generators are installed on the outer sides of the pulley supports, and rotating shafts of the generators and the outer side ends of the shaft rods are installed together; the rotating speed detection circuit, the electric leakage detection circuit and the rectification circuit are installed in the electric control box and are electrically connected. In the application, the rotating speed detection circuit and the generator act together, the rotating speed condition of the pulley of the electric hanging basket can be monitored in real time, the electric leakage detection circuit can monitor whether the basket leaks electricity or not, and when the rotating speed of the pulley is abnormally increased, the ascending or descending speed of the basket exceeds a threshold value and the basket leaks electricity, the electric leakage detection circuit can detect the electric leakage of the basket. The electric hanging basket is simple in structure and convenient to use, can timely produce sound to prompt workers in the basket and cut off a main power supply of the electric hanging basket, reduces the probability of safety accidents caused by too high ascending or descending speed and electric leakage of the basket, can achieve a better safety effect, and has a good application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of accessories used in conjunction with aerial work equipment, in particular to a pulley device for a hanging basket. Background Art

[0002] The electric hanging basket is a commonly used work tool, and its main structure includes an electric winch and a basket frame. When the electric hanging basket is used to install equipment or clean glass and walls in high-rise buildings, or to install components and maintain mechanical equipment at a high height, two working wire ropes are generally set vertically downward from the upper end of the work point. The two working wire ropes pass through the wheel grooves of the pulleys on both sides of the high fixed frame and go toward the lower end (some fixed frames are installed at the lower end of the support frame that can be displaced laterally, and the fixed frame drives the basket frame at the lower end to move left or right, increasing the working range). Then the outer ends on both sides of the lower end of each wire rope are fixedly connected to the outer ends of the basket, and the inner side of the lower end of each wire rope is connected to the reel of one of the electric winches on both sides of the basket. When the staff controls the rotation direction of the motor of the electric winch, the reduction gear of the electric winch will reduce the motor power to increase the torque and then drive the reel to rotate clockwise or counterclockwise, reel or unreel the wire rope, and then the basket rises or falls in height. After the basket stops moving, the staff can work at the corresponding height.

[0003] Although the existing electric hanging baskets have met the work needs to a certain extent, due to structural limitations, there are still the following technical problems that need to be solved urgently. First: When the on-site power supply voltage fluctuation suddenly increases, or when the electric winch motor works abnormally, there is a problem that the motor speed is too high and the wire rope drives the hanging basket to rise or fall too quickly. This will pose a certain threat to the safety of the staff in the basket (the reduction gear is worn or damaged, especially when the basket is lowered, there is also a problem of the descent speed being too fast). Second: Electric hanging baskets are especially used for cleaning operations, which involve the use of water during the operation. In this way, when the electrical performance of the equipment deteriorates, the probability of leakage will be relatively large, so there is a safety hazard of electric shock to the staff. Utility Model Content

[0004] In order to overcome the drawbacks of the existing electric hanging basket due to structural limitations as described in the background technology, the utility model provides a coordinated electric hanging basket. During application, the pulley speed of the electric hanging basket and whether the basket is leaking electricity can be monitored in real time. When the abnormal speed represents that the rising or falling speed of the basket exceeds a threshold or the basket is leaking electricity, it can promptly sound a reminder to the staff in the basket and disconnect the main power supply, thereby reducing the probability of safety accidents caused by excessive rising or descending speed and basket leakage, thereby achieving a better safety effect. A pulley device for a hanging basket.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A pulley device for a hanging basket, comprising a pulley and an AC generator, characterized in that it also has a speed detection circuit, a leakage detection circuit, and a rectifier circuit; the shaft of the pulley is located at the outer end of the pulley bracket, the shell of the generator is installed on the outside of the pulley bracket, and the rotating shaft of the generator and the outer end of the shaft are installed together; the speed detection circuit, the leakage detection circuit, and the rectifier circuit are installed in an electric control box; the signal output end of the leakage detection circuit is electrically connected to the signal input end of the speed detection circuit; the power output end of the generator is electrically connected to the power input end of the rectifier circuit, and the signal output end of the rectifier circuit is electrically connected to the signal input end of the speed detection circuit.

[0007] Furthermore, the rectifier circuit includes an electrically connected bridge stack and a capacitor, and two ends of the bridge stack power output are respectively connected to the positive electrode and the negative electrode of the capacitor.

[0008] Furthermore, the speed detection circuit includes an electrically connected relay and transistor, an adjustable resistor, a resistor, and a buzzer, the positive power supply input terminal of the buzzer is connected to the positive power supply input terminal of the relay, one end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor, the other end of the second resistor is connected to the base of the transistor, the collector of the transistor is connected to the negative power supply input terminal of the relay and the buzzer, and the emitter of the transistor is connected to the other end of the first resistor.

[0009] Furthermore, the leakage detection circuit includes an electrically connected relay and thyristor, a buzzer, and a resistor, one end of the resistor is connected to the metal part of the basket, the other end of the resistor is connected to the thyristor control electrode, the thyristor cathode is connected to the buzzer and the relay positive power input terminal, the relay negative power input terminal and the control power input terminal are connected to the buzzer negative power input terminal.

[0010] The beneficial effect of the utility model is that the utility model is used in conjunction with an electric hanging basket. During application, the speed detection circuit and the generator work together to monitor the pulley speed of the electric hanging basket in real time. The leakage detection circuit can monitor whether the basket is leaking electricity. When the pulley speed becomes abnormally fast, which means that the ascent or descent speed of the basket exceeds a threshold, and when the basket is leaking electricity, it can promptly sound a reminder to the staff in the basket and disconnect the main power supply of the electric hanging basket, thereby reducing the probability of safety accidents caused by excessive ascent or descent speed and basket leakage, thereby achieving better safety effects and having good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the overall structure and the partially enlarged structure of the utility model.

[0013] Figure 2This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0014] Figure 1 , 2 As shown, a pulley device for a hanging basket comprises a pulley 2 installed on one side of a fixing frame of an electric hanging basket body 1, a power module A1, and a micro AC generator M, and also has a speed detection circuit 3, a leakage detection circuit 4, a rectifier circuit 5, and a battery G1; the rear part of the shaft rod 21 of the pulley is located at the rear outer end of the pulley bracket 22 (the front and rear parts of the shaft rod 21 are respectively tightly sleeved in the inner ring of the bearing at the front and rear ends of the middle part of the pulley bracket 22), and three support rods 23 are welded at intervals on the front outer end of the shell of the generator M, and the three support rods 23 are respectively welded to the middle part of the rear outer end of the pulley bracket 22, and the front part of the rotating shaft of the generator M and the rear end of the shaft rod 23 are welded together; the power module A1, the speed detection circuit 3, the leakage detection circuit 4, the rectifier circuit 5, and the battery G1 are installed on the circuit board in the electric control box 6 in the basket of the hanging basket body.

[0015] Figure 1 , 2As shown, the rectifier circuit includes a bridge rectifier A2 and a capacitor C1 connected via circuit board wiring, and the 3rd and 4th pins of the power output of the bridge rectifier A2 are respectively connected to the positive and negative electrodes of the capacitor C1. The speed detection circuit includes a relay K2 and a transistor Q2, an adjustable resistor RP, resistors R5 and R6, and a buzzer B1 connected via circuit board wiring, the positive power input end of the buzzer B1 is connected to the positive power input end of the relay K2, one end of the adjustable resistor RP is connected to one end of the first resistor R5 and one end of the second resistor R6, the other end of the second resistor R6 is connected to the base of the transistor Q2, the collector of the transistor Q2 is connected to the negative power input end of the relay K2 and the buzzer B1, and the emitter of the transistor Q2 is connected to the other end of the first resistor R5. The leakage detection circuit includes a relay K3 and a thyristor VS, a buzzer B2, and a resistor R7 connected via circuit board wiring. One end of the resistor R7 is connected to a metal portion D of the basket 101 via a wire, and the other end of the resistor R7 is connected to a control electrode of the thyristor VS. The cathode of the thyristor VS is connected to the positive power input terminal of the buzzer B2 and the relay K3. The negative power input terminal and the control power input terminal of the relay K3 are connected to the negative power input terminal of the buzzer B2. The power input terminals 1 and 2 of the power module A1, the two control power input terminals of the relay K2 of the speed detection circuit and the two poles of the AC 220V power supply are connected via wires respectively, the power output terminals 3 and 4 of the power module A1 are connected in series via the power switch S and the positive power input terminal of the power input terminal relay K2 of the speed detection circuit and the emitter of the transistor Q2, the anode of the power input terminal thyristor VS of the leakage detection circuit and the negative power input terminal of the buzzer B2 are connected via wires respectively (the two poles of the battery G1 and the power output terminals 3 and 4 of the power module A1 are connected via wires respectively), the normally open contact terminal of the signal output terminal relay K3 of the leakage detection circuit and the negative power input terminal of the signal input terminal relay K2 of the speed detection circuit are connected via wires; the power output terminal of the generator M and the bridge stack power input terminals 1 and 2 of the rectifier circuit A2 are connected via wires respectively, and the positive pole of the signal output terminal capacitor C1 of the rectifier circuit and the other end of the adjustable resistor RP of the signal input terminal of the speed detection circuit are connected via wires. The two normally closed contact terminals of the relay K2 of the speed detection circuit and the two main power input terminals SD of the electric hanging basket body 1 are connected via wires respectively.

[0016] Figure 1 , 2As shown, the new type of coordinated electric hanging basket body 1 is used. When the electric hanging basket body 1 is used for installing equipment in high-rise buildings or cleaning glass and walls, and for installing components and maintaining mechanical equipment at a high height, two working wire ropes are vertically arranged downward at the upper end of the working point (the wire ropes are passed downward through the wheel groove of the pulley), and the lower end of the working wire rope 102 is fixed together with the winch reel at the left and right sides of the basket of the electric hanging basket. During operation, the reel of the electric winch can reel in the wire rope or unwind the wire rope to achieve the height adjustment of the basket 101, and then the operator can be located in the basket at the required height working point to work (the above is the existing mature technology, and this application will not be repeated). After the AC power enters the power input end of the power module A1, the 3rd and 4th pins of the power module A1 output a stable DC 12V power supply to enter the power input end of the speed detection circuit and the leakage detection circuit (at the same time, the 12V power supply enters the power input end of the battery G1 to float charge the battery G1 to ensure that the relevant circuits can still work normally after the total power input end loses power). When the steel wire rope 102 of the electric hanging basket body 1 moves up or down, driving the basket 101 to move up or down, the synchronous pulley 2 will rotate, and the shaft 21 of the pulley drives the rotating shaft of the generator M to rotate. The generator M sends out a power supply of about 5V and enters the power input end of the bridge pile A2. The 3rd and 4th pins of the bridge pile A2 output a DC power supply (filtering function of the capacitor C1) and enter the other end of the adjustable resistor RP. In actual circumstances, when the up or down speed of the basket is normal, that is, when the speed of the wire rope moving along the outer side of the pulley groove is relatively slow, since the rotation speed of the pulley 2 is relatively slow, the corresponding generator M shaft speed is relatively slow, and the power supply voltage output by the generator M is not too high, the voltage signal is divided by the adjustable resistor RP and the resistor R5, and the resistor R6 reduces the voltage and limits the current to enter the base of the transistor Q2 below 0.7V. The transistor Q2 will not be turned on, and the relay K2 will not be energized and attracted. Then the two main power input terminals SD of the electric hanging basket body 1 are normally energized, and the staff in the basket can normally control the up or down movement mode of the basket of the electric hanging basket body 1. When the speed of the basket is abnormally fast, that is, when the wire rope moves relatively fast along the outer side of the pulley groove, due to the relatively fast rotation speed of the pulley 2, the corresponding generator M shaft speed is relatively fast, and the power supply voltage output by the generator M is too high. The voltage signal is divided by the adjustable resistor RP and the resistor R5, and the resistor R6 steps down and limits the current to enter the base of the transistor Q2, which is higher than 0.7V. The transistor Q2 will turn on the collector to output a low level and enter the negative power input terminal of the buzzer B1 and the relay K2. The relay K2 will be energized to attract its control power input terminal and the normally closed contact terminal to open the circuit. Then, the two main power input terminals SD of the electric hanging basket body 1 are no longer energized, and the staff in the basket can no longer control the up or down movement mode of the basket of the electric hanging basket body 1 (at the same time, the buzzer B1 is energized to sound to remind the staff in the basket that the basket is moving up or down too fast).

[0017] Figure 1 ,2 As shown, in actual application, when there is no leakage in the basket 101, the thyristor VS will not be triggered to conduct, and the relay K2 will not be energized and attracted, so the two main power input terminals SD of the electric hanging basket body 1 are normally energized, and the staff in the basket can normally control the basket up or down movement mode of the electric hanging basket body 1. When the basket 101 leaks electricity, the leakage current will trigger the thyristor VS to conduct through the resistor R7 voltage reduction and current limiting, and then the relay K3 will be energized to attract its control power input terminal and the normally open contact terminal to close (the buzzer B2 will also be energized to work), and then the relay K2 will be energized to attract its control power input terminal and the normally closed contact terminal to open, and the two main power input terminals SD of the electric hanging basket body 1 will no longer be energized, and the staff in the basket can no longer control the basket up or down movement mode of the electric hanging basket body 1 (at the same time, the buzzer B2 is energized to sound to remind the staff in the basket that the basket has leakage), which also prevents the safety hazards caused by rising or falling too fast. Through the above, in the present new application, the pulley speed of the electric hanging basket can be monitored in real time, and whether the basket has leakage can be monitored. When the pulley speed becomes abnormally fast, which means that the height of the basket rising or falling exceeds the threshold, and when the basket has leakage, it can promptly sound a reminder to the staff in the basket and disconnect the main power supply of the electric hanging basket, reducing the probability of safety accidents caused by excessive ascent or descent speed and basket leakage, thereby achieving better safety effects. Figure 2 As shown, the resistance values ​​of resistors R5, R6 and R7 are 7K, 47K and 1M respectively; the transistor Q2 is an NPN transistor of model 9013; the buzzers B1 and B2 are finished active continuous sound buzzer alarms of model MF12V (the two have different sounds, which is convenient for staff to distinguish); the relays K2 and K3 are DC12V; the power module A1 is an AC 220V to DC 12V power module; the capacitor C1 is a 470μF / 400V non-polar electrolytic capacitor (filtering function); the bridge rectifier A2 is KBP301; the thyristor VS is MCR100-1; the adjustable resistor RP is 470K (adjusted to 43K in this embodiment); the generator M is a small AC generator (5V).

[0018] Those skilled in the art should understand that although this specification is described in accordance with the implementation methods, the implementation methods do not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art. Therefore, the scope of protection of this application is defined by the claims.

Claims

1. A pulley device for a hanging basket, comprising a pulley and an AC generator, characterized in that: It also has a speed detection circuit, a leakage detection circuit, and a rectifier circuit; the shaft of the pulley is located at the outer end of the pulley bracket, the shell of the generator is installed on the outside of the pulley bracket, and the rotating shaft of the generator and the outer end of the shaft are installed together; the speed detection circuit, leakage detection circuit, and rectifier circuit are installed in the electric control box; the signal output end of the leakage detection circuit is electrically connected to the signal input end of the speed detection circuit; the power output end of the generator is electrically connected to the power input end of the rectifier circuit, and the signal output end of the rectifier circuit is electrically connected to the signal input end of the speed detection circuit.

2. A pulley device for a hanging basket according to claim 1, characterized in that: The rectifier circuit includes an electrically connected bridge stack and a capacitor, and the two ends of the bridge stack power output are connected to the positive electrode and the negative electrode of the capacitor respectively.

3. A pulley device for a hanging basket according to claim 1, characterized in that: The speed detection circuit includes an electrically connected relay and transistor, an adjustable resistor, a resistor, and a buzzer. The positive power input terminal of the buzzer is connected to the positive power input terminal of the relay, one end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor, the other end of the second resistor is connected to the base of the transistor, the collector of the transistor is connected to the negative power input terminal of the relay and the buzzer, and the emitter of the transistor is connected to the other end of the first resistor.

4. A pulley device for a hanging basket according to claim 1, characterized in that: The leakage detection circuit includes an electrically connected relay and thyristor, a buzzer, and a resistor. One end of the resistor is electrically connected to the metal part of the basket, the other end of the resistor is connected to the control electrode of the thyristor, the cathode of the thyristor is connected to the buzzer and the positive power input end of the relay, and the negative power input end of the relay and the control power input end are connected to the negative power input end of the buzzer.

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