An electric box for a construction hanging basket and a control circuit board

Abstract

The present invention relates to an electric box for a construction hanging basket and a control circuit board. The electric box includes: an up control button, a down control button, a three-speed change switch, an interlock relay group, a first up control relay group, a second up control relay group, a first down control relay group, a second down control relay group, and a brake control relay group; a relay with a fully enclosed structure is used to control the motor of the construction hanging basket, overcoming the problems of abnormal noise, heating, and poor contact that occur when a contactor is used to control the motor in the prior art, so as to adapt to use in harsh environments; and all the relays are welded on the circuit board, greatly reducing the wiring inside the electric box, minimizing the faults of intricate internal connection wires in the electric box that are prone to disconnection and poor contact, and facilitating maintenance.

Description

Technical Field

[0001] The present invention relates to the field of building hanging basket control, in particular to a building hanging basket electric box and a control circuit board. Background Art

[0002] At present, the electrical boxes used in construction hanging baskets are all used outdoors in a relatively harsh environment. Since the components inside the electrical box that control the operation of the motor are all controlled by contactors, the electromagnets and contacts inside the contactors are not in a completely sealed state, and it is easy for foreign matter such as dust to enter, causing many problems such as abnormal noise, heat, and poor contact. In addition, the complex connecting wires inside the electrical box are also prone to disconnection and poor contact failures. There is a lack of professional technical maintenance personnel on the construction site. Once a failure occurs, it will cause great losses to the construction unit.

[0003] Therefore, designing an electrical box that is suitable for use in harsh environments, reduces failure rates, and is easy to maintain is a technical problem that needs to be solved urgently in this field. Summary of the Invention

[0004] The purpose of the present invention is to provide an electrical box and a control circuit board for a building hanging basket, which are suitable for use in harsh environments, reduce the failure rate, and are convenient for maintenance.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] An electrical box for a building hanging basket, comprising: an ascending control button, a descending control button, a three-speed transfer switch, an interlocking relay group, a first ascending control relay group, a second ascending control relay group, a first descending control relay group, a second descending control relay group, and a brake control relay group;

[0007] The normally open contact of the first ascending control relay group is connected in series to the forward drive circuit of the left motor of the hanging basket, and the normally open contact of the second ascending control relay group is connected in series to the forward drive circuit of the right motor of the hanging basket; the normally open contact of the first descending control relay group is connected in series to the reverse drive circuit of the left motor of the hanging basket, and the normally open contact of the second descending control relay group is connected in series to the reverse drive circuit of the right motor of the hanging basket;

[0008] The interlock relay group includes relay KA1 and relay KA2; the brake control relay group includes relay KA6 and relay KA13; the normally open contact of relay KA6 is connected in series to the drive circuit of the brake device of the left motor; the normally open contact of relay KA13 is connected in series to the drive circuit of the brake device of the right motor;

[0009] One end of the upward control button is connected to the positive pole of the control power supply, the other end of the upward control button is connected to one end of the normally closed contact of the relay KA2, the other end of the normally closed contact of the relay KA2 is connected to one end of the coil of the relay KA1, and the other end of the coil of the relay KA1 is connected to the negative pole of the control power supply;

[0010] One end of the downward control button is connected to the positive pole of the control power supply, the other end of the downward control button is connected to one end of the normally closed contact of the relay KA1, the other end of the normally closed contact of the relay KA1 is connected to one end of the coil of the relay KA2, and the other end of the coil of the relay KA2 is connected to the negative pole of the control power supply;

[0011] One end of the coil of the first upward control relay group and one end of the coil of the second upward control relay group are both connected to the other end of the normally closed contact of the relay KA2; the other end of the coil of the first upward control relay group is connected to the first moving contact of the three-position changeover switch; the other end of the coil of the second upward control relay group is connected to the second moving contact of the three-position changeover switch;

[0012] One end of the coil of the first downward control relay group and one end of the coil of the second downward control relay group are both connected to the other end of the normally closed contact of the relay KA1; the other end of the coil of the first downward control relay group is respectively connected to the first moving contact of the three-position changeover switch; the other end of the coil of the second downward control relay group is connected to the second moving contact of the three-position changeover switch;

[0013] One end of the coil of the relay KA6 is connected to the other end of the normally closed contact of the relay KA2 through the diode D14, and the other end of the coil of the relay KA6 is connected to the first moving contact of the three-position changeover switch; one end of the relay KA13 is connected to the other end of the normally closed contact of the relay KA1 through the diode D16, and the other end of the coil of the relay KA13 is connected to the second moving contact of the three-position changeover switch; one end of the coil of the relay KA6 is also connected to one end of the relay KA13;

[0014] The static contact of the three-position changeover switch is connected to the negative pole of the control power supply.

[0015] Optionally, the electric box further includes: diode D18, diode D20, diode D19 and diode D21;

[0016] The diode D18 is connected in series in the forward direction between the other end of the coil of the first upward control relay group and the first moving contact of the three-position changeover switch;

[0017] The diode D20 is connected in series in the forward direction between the other end of the coil of the second upward control relay group and the second moving contact of the three-speed changeover switch;

[0018] The diode D19 is connected in series in the forward direction between the other end of the coil of the first downward control relay group and the first moving contact of the three-speed changeover switch;

[0019] The diode D21 is connected in series in the forward direction between the other end of the coil of the second downward control relay group and the second moving contact of the three-speed changeover switch.

[0020] Optionally, the first upward control relay group, the second upward control relay group, the first downward control relay group, and the second downward control relay group each include three high-power relays, and the coils of the three high-power relays are connected in parallel.

[0021] Optionally, a diode D8 is connected in antiparallel across the first upward control relay group, a diode D10 is connected in antiparallel across the second upward control relay group, a diode D9 is connected in antiparallel across the first downward control relay group, and a diode D11 is connected in antiparallel across the second downward control relay group;

[0022] A diode D6 is connected in antiparallel across the relay KA1, and a diode D7 is connected in antiparallel across the relay KA2;

[0023] A diode D12 is connected in antiparallel across the relay KA6, and a diode D13 is connected in antiparallel across the relay KA13.

[0024] Optionally, the electric box further includes: a light-emitting diode D2, a light-emitting diode D3, a resistor R2, and a resistor R3;

[0025] The light-emitting diode D2 and the resistor R2 are connected in series and then connected in parallel with the coil of the relay KA1;

[0026] The light-emitting diode D3 and the resistor R3 are connected in series and then connected in parallel with the coil of the relay KA2.

[0027] Optionally, a first travel switch and a second travel switch are connected in series between the other end of the upward control button and one end of the normally closed contact of the relay KA2.

[0028] Optionally, the electric box further includes: a light-emitting diode D4, a light-emitting diode D5, a resistor R4, and a resistor R5;

[0029] The light-emitting diode D4 and the resistor R4 are connected in series and then connected in parallel with the first travel switch;

[0030] The light-emitting diode D5 is connected in series with the resistor R5 and then connected in parallel with the second travel switch.

[0031] Optionally, the control power supply includes: a full-wave bridge rectifier, an electrolytic capacitor, a light-emitting diode D1, and a resistor R1;

[0032] The input end of the full-bridge rectifier is connected to an AC power supply, and the output end of the full-wave bridge rectifier is connected in parallel with the electrolytic capacitor;

[0033] The light-emitting diode D1 and the resistor R1 are connected in series and then connected in parallel with the electrolytic capacitor.

[0034] Optionally, the electrical box further includes: a box body;

[0035] The interlock relay group, the first ascending control relay group, the second ascending control relay group, the first descending control relay group, the second descending control relay group, and the brake control relay group are all arranged inside the box body;

[0036] The ascending control button, the descending control button, and the three-position conversion switch are all arranged on the box body.

[0037] A control circuit board for a building hanging basket, on which an interlock relay group, a first ascending control relay group, a second ascending control relay group, a first descending control relay group, a second descending control relay group, and a brake control relay group are arranged;

[0038] The connection relationships of the interlock relay group, the first ascending control relay group, the second ascending control relay group, the first descending control relay group, the second descending control relay group, and the brake control relay group are the same as those of the interlock relay group, the first ascending control relay group, the second ascending control relay group, the first descending control relay group, the second descending control relay group, and the brake control relay group of the building hanging basket electrical box.

[0039] According to the specific embodiments provided by the present invention, the following technical effects of the present invention are disclosed:

[0040] By using a relay with a fully enclosed structure to control the motor of the building hanging basket, the present invention overcomes the problems of abnormal noise, heating, and poor contact that easily occur when the prior art uses a contactor to control the motor due to dust entering, so as to adapt to use in a harsh environment; and all the relays are soldered on the circuit board, greatly reducing the wiring inside the electrical box, minimizing the faults of easy disconnection and poor contact caused by the intricate internal connection wires of the electrical box, and facilitating maintenance.

[0041] The present invention uses a first ascending control relay group and a first descending control relay group to respectively control the forward and reverse rotations of the left motor of the construction hanging basket, and a second ascending control relay group and a second descending control relay group to respectively control the forward and reverse rotations of the right motor of the construction hanging basket. The forward and reverse rotation controls do not share relays, which maximally extends the service life of the entire control system, thereby greatly improving the reliability of the electrical box.

[0042] The present invention uses relay KA1 and relay KA2 to respectively control the ascending and descending of the hanging basket, achieving the forward and reverse interlock of the motor and ensuring the safe operation of the motor. Brief Description of the Drawings

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0044] Figure 1 It is the circuit connection diagram of the electrical box of the construction hanging basket provided by the present invention. Detailed Embodiments

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0046] The purpose of the present invention is to provide an electrical box and a control circuit board for a construction hanging basket to adapt to use in harsh environments, reduce the failure rate, and facilitate maintenance at the same time.

[0047] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0048] Figure 1 It is the circuit connection diagram of the electrical box of the construction hanging basket provided by the present invention. As Figure 1 shown, an electrical box for a construction hanging basket includes: an ascending control button SB1, a descending control button SB2, a three - gear conversion switch SA1, an interlock relay group, a first ascending control relay group, a second ascending control relay group, a first descending control relay group, a second descending control relay group, and a brake control relay group.

[0049] The normally open contacts of the first ascending control relay group are connected in series to the forward driving circuit of the left motor of the hanging basket, and the normally open contacts of the second ascending control relay group are connected in series to the forward driving circuit of the right motor of the hanging basket. The normally open contacts of the first descending control relay group are connected in series to the reverse driving circuit of the left motor of the hanging basket, and the normally open contacts of the second descending control relay group are connected in series to the reverse driving circuit of the right motor of the hanging basket.

[0050] The motor is three-phase 380V, with forward rotation for ascending and reverse rotation for descending. Relay KA3, relay KA4, and relay KA5 form the first ascending control relay group to control the left motor to ascend. Relay KA7, relay KA8, and relay KA9 form the second ascending control relay group to control the right motor to ascend. Relay KA10, relay KA11, and relay KA12 form the first descending control relay group to control the left motor to descend. Relay KA14, relay KA15, and relay KA16 form the second descending control relay group to control the right motor to descend. One motor is controlled by 3 relays for ascending, 3 relays for descending, and 1 relay for electromagnetic braking, that is, one motor is controlled by 7 relays. Since there are 2 motors in a hanging basket, a total of 14 high-power relays KA3 - KA16 are welded on our circuit board to complete the control of the ascending and descending of the hanging basket.

[0051] The braking control relay group includes relay KA6 and relay KA13. The normally open contacts of relay KA6 are connected in series to the driving circuit of the braking device of the left motor. The normally open contacts of relay KA13 are connected in series to the driving circuit of the braking device of the right motor. KA6 controls the electromagnetic braking of the left motor, and KA13 controls the electromagnetic braking of the right motor.

[0052] The interlock relay group includes relay KA1 and relay KA2.

[0053] One end of the ascending control button SB1 is connected to the positive pole of the control power supply, the other end of the ascending control button SB1 is connected to one end of the normally closed contact of relay KA2, the other end of the normally closed contact of relay KA2 is connected to one end of the coil of relay KA1, and the other end of the coil of relay KA1 is connected to the negative pole of the control power supply.

[0054] One end of the descending control button SB2 is connected to the positive pole of the control power supply, the other end of the descending control button SB2 is connected to one end of the normally closed contact of relay KA1, the other end of the normally closed contact of relay KA1 is connected to one end of the coil of relay KA2, and the other end of the coil of relay KA2 is connected to the negative pole of the control power supply.

[0055] Relay KA1 controls the rising of the left and right motors, and relay KA2 controls the falling of the left and right motors, while completing the interlock between the rising and falling of the motors. That is, when the SB1 rising button is pressed first, KA1 is energized, and the normally closed contact of KA1 cuts off the power supply circuit of the KA2 coil. At this time, if the SB2 falling button is pressed again, KA2 will not be energized either, which means that the hanging basket can only rise and cannot fall at this time. Similarly, when the SB2 falling button is pressed first, KA2 is energized, and the normally closed contact of KA2 cuts off the power supply circuit of the KA1 coil. At this time, if the SB1 rising button is pressed again, KA1 will not be energized either. In this way, the interlock between rising and falling is achieved.

[0056] One end of the coil of the first rising control relay group and one end of the coil of the second rising control relay group are both connected to the other end of the normally closed contact of relay KA2. The other end of the coil of the first rising control relay group is respectively connected to the first moving contact of the three-position switch SA1. The other end of the coil of the second rising control relay group is connected to the second moving contact of the three-position switch SA1.

[0057] One end of the coil of the first falling control relay group and one end of the coil of the second falling control relay group are both connected to the other end of the normally closed contact of relay KA1. The other end of the coil of the first falling control relay group is respectively connected to the first moving contact of the three-position switch SA1. The other end of the coil of the second falling control relay group is connected to the second moving contact of the three-position switch SA1.

[0058] One end of the coil of relay KA6 is connected to the other end of the normally closed contact of relay KA2 through diode D14, and the other end of the coil of relay KA6 is connected to the first moving contact of the three-position switch SA1. One end of relay KA13 is connected to the other end of the normally closed contact of relay KA1 through diode D16, and the other end of the coil of relay KA13 is connected to the second moving contact of the three-position switch SA1. One end of the coil of relay KA6 is also connected to one end of relay KA13.

[0059] The static contact of the three-position switch SA1 is connected to the negative pole of the control power supply.

[0060] Relays KA1 - KA16 are all high-power fully enclosed relays.

[0061] The electrical box further includes: diode D18, diode D20, diode D19, and diode D21. Diode D18 is connected in series in the forward direction between the other end of the coil of the first rising control relay group and the first moving contact of the three-position switch SA1. Diode D20 is connected in series in the forward direction between the other end of the coil of the second rising control relay group and the second moving contact of the three-position switch SA1. Diode D19 is connected in series in the forward direction between the other end of the coil of the first descending control relay group and the first moving contact of the three-position switch SA1. Diode D21 is connected in series in the forward direction between the other end of the coil of the second descending control relay group and the second moving contact of the three-position switch SA1.

[0062] The first rising control relay group, the second rising control relay group, the first descending control relay group, and the second descending control relay group each include three high-power relays, and the coils of the three high-power relays are connected in parallel. The high-power relay is a relay with a contact rated load current (resistive) of 10A, 15A, 20A, 25A, 40A... when the contact open-circuit voltage is 28V DC.

[0063] Diode D8 is connected in parallel in the reverse direction to the first rising control relay group, diode D10 is connected in parallel in the reverse direction to the second rising control relay group, diode D9 is connected in parallel in the reverse direction to the first descending control relay group, and diode D11 is connected in parallel in the reverse direction to the second descending control relay group. Relay KA1 is connected in parallel in the reverse direction with diode D6, and relay KA2 is connected in parallel in the reverse direction with diode D7. Relay KA6 is connected in parallel in the reverse direction with diode D12, and relay KA13 is connected in parallel in the reverse direction with diode D13.

[0064] The electrical box further includes: light-emitting diode D2, light-emitting diode D3, resistor R2, and resistor R3. Light-emitting diode D2 and resistor R2 are connected in series and then connected in parallel with the coil of relay KA1. Light-emitting diode D3 and resistor R3 are connected in series and then connected in parallel with the coil of relay KA2. D2 is the working indication when the rising control button SB1 is pressed, and D3 is the working indication when the descending control button SB2 is pressed.

[0065] A first travel switch SQ1 and a second travel switch SQ2 are connected in series between the other end of the rising control button SB1 and one end of the normally closed contact of relay KA2. The first travel switch SQ1 and the second travel switch SQ2 are installed on the hanging basket to prevent the hanging basket from continuing to rise after reaching the highest limit position due to improper operation by the staff or other faults, etc., resulting in equipment damage and endangering the personal safety of the operating workers.

[0066] The electrical box further includes: light-emitting diode D4, light-emitting diode D5, resistor R4, and resistor R5. The light-emitting diode D4 is connected in series with the resistor R4 and then connected in parallel with the first travel switch. The light-emitting diode D5 is connected in series with the resistor R5 and then connected in parallel with the second travel switch. The light-emitting diode D4 is an indication when the first travel switch SQ1 rises to the limit position and operates, and the light-emitting diode D5 is an indication when the second travel switch SQ2 rises to the limit position and operates.

[0067] The control power supply includes: a full-wave bridge rectifier, electrolytic capacitor C1, light-emitting diode D1, and resistor R1. The input end of the full-bridge rectifier is connected to the AC power supply, and the output end of the full-wave bridge rectifier is connected in parallel with the electrolytic capacitor C1. The light-emitting diode D1 and the resistor R1 are connected in series and then connected in parallel with the electrolytic capacitor C1.

[0068] The full-wave bridge rectifier is soldered on the circuit board. The AC side is the input end of the low-voltage power supply of the circuit board. There are two terminals on the circuit board for connecting the two low-voltage side leads of the transformer. The rectified DC is directly connected to the low-voltage DC power supply system of the circuit board.

[0069] The function of the electrolytic capacitor C1 is to filter the DC side power supply of the full-wave bridge rectifier, eliminate the peaks in the DC circuit, and improve the stability of the circuit. D1 is the power indication of the circuit board. When the circuit board power supply is normal, D1 emits light.

[0070] The electrical box further includes: a box body. The interlock relay group, the first rising control relay group, the second rising control relay group, the first falling control relay group, the second falling control relay group, and the brake control relay group are all arranged inside the box body. The rising control button SB1, the falling control button SB2, and the three-position switch SA1 are all arranged on the box body.

[0071] Figure 1 The circuit of the shown construction hanging basket electrical box further includes diode D15 and diode D17. The diode D15 is connected in series in the forward direction between the other end of the coil of the relay KA6 and the first moving contact of the three-position switch SA1. The diode D17 is connected in series in the forward direction between the other end of the coil of the relay KA13 and the second moving contact of the three-position switch SA1.

[0072] The working principle of the construction hanging basket provided by the present invention is:

[0073] When SA1 is turned to the middle, the static contact of SA1 is connected to both the first moving contact and the second moving contact. When the upward control button SB1 is pressed, KA1 is energized, controlling KA3, KA4, KA5, KA7, KA8, KA9, KA6, and KA13 to be energized simultaneously, and the left and right motors rise simultaneously. When the downward control button SB2 is pressed, KA2 is energized, controlling KA10, KA11, KA12, KA14, KA15, KA16, KA6, and KA13 to be energized simultaneously, and the left and right motors descend simultaneously.

[0074] When SA1 is turned to the left, the static contact of SA1 is connected to the first moving contact. When the upward control button SB1 is pressed, KA1 is energized, controlling KA3, KA4, KA5, and KA6 to be energized simultaneously, and the left motor rises. When the downward control button SB2 is pressed, KA2 is energized, controlling KA10, KA11, KA12, and KA6 to be energized simultaneously, and the left motor descends.

[0075] When SA1 is turned to the right, the static contact of SA1 is connected to the second moving contact. When the upward control button SB1 is pressed, KA1 is energized, controlling KA7, KA8, KA9, and KA13 to be energized simultaneously, and the right motor rises. When the downward control button SB2 is pressed, KA2 is energized, controlling KA14, KA15, KA16, and KA13 to be energized simultaneously, and the right motor descends.

[0076] The present invention also provides a control circuit board for a construction hanging basket. The control circuit board is provided with an interlock relay group, a first upward control relay group, a second upward control relay group, a first downward control relay group, a second downward control relay group, and a brake control relay group.

[0077] The connection relationships of the interlock relay group, the first upward control relay group, the second upward control relay group, the first downward control relay group, the second downward control relay group, and the brake control relay group are the same as those of the interlock relay group, the first upward control relay group, the second upward control relay group, the first downward control relay group, the second downward control relay group, and the brake control relay group in the construction hanging basket electrical box provided by the present invention.

[0078] The beneficial effects of the present invention are as follows:

[0079] 1. The upward and downward movements of the hanging basket are controlled by two low-power relays KA1 and KA2, and at the same time, the forward and reverse interlock of the motor is realized, that is, when the upward button is pressed and the motor rotates forward, if the downward button is pressed again, the motor still maintains forward rotation and will not reverse. This ensures the safety of the components during operation.

[0080] 2. Control of the motor: Three high-power relays are used to control the forward rotation of the motor, and another three are used to control the reverse rotation. The forward and reverse rotation controls do not share relays, which maximally extends the service life of the entire control system.

[0081] 3. Since the design scheme of welding the relays on the circuit board is adopted, the wiring inside the electrical box is significantly reduced, and the fault points caused by problems such as loose or virtual connection of wires are minimized. The use of fully enclosed high-power relays also reduces the faults caused by dust and other foreign objects to the electrical box. In this way, not only the faults caused by relay damage during use are reduced, but also the service life of the electrical box is extended, thus significantly improving the reliability of the electrical box.

[0082] In this specification, each embodiment is described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts between the embodiments, reference can be made to each other.

[0083] In this article, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An electric box for a construction hanging basket, characterized in that, The electric box includes: an up control button, a down control button, a three - gear conversion switch, an interlock relay group, a first up control relay group, a second up control relay group, a first down control relay group, a second down control relay group, and a brake control relay group; The normally - open contacts of the first up control relay group are connected in series on the forward - drive circuit of the left - hand motor of the hanging basket, and the normally - open contacts of the second up control relay group are connected in series on the forward - drive circuit of the right - hand motor of the hanging basket; the normally - open contacts of the first down control relay group are connected in series on the reverse - drive circuit of the left - hand motor of the hanging basket, and the normally - open contacts of the second down control relay group are connected in series on the reverse - drive circuit of the right - hand motor of the hanging basket; The interlock relay group includes relay KA1 and relay KA2; the brake control relay group includes relay KA6 and relay KA13; the normally - open contacts of relay KA6 are connected in series on the drive circuit of the braking device of the left - hand motor; the normally - open contacts of relay KA13 are connected in series on the drive circuit of the braking device of the right - hand motor; One end of the up control button is connected to the positive pole of the control power supply, the other end of the up control button is connected to one end of the normally - closed contact of relay KA2, the other end of the normally - closed contact of relay KA2 is connected to one end of the coil of relay KA1, and the other end of the coil of relay KA1 is connected to the negative pole of the control power supply; One end of the down control button is connected to the positive pole of the control power supply, the other end of the down control button is connected to one end of the normally - closed contact of relay KA1, the other end of the normally - closed contact of relay KA1 is connected to one end of the coil of relay KA2, and the other end of the coil of relay KA2 is connected to the negative pole of the control power supply; One end of the coil of the first up control relay group and one end of the coil of the second up control relay group are both connected to the other end of the normally - closed contact of relay KA2; the other end of the coil of the first up control relay group is connected to the first moving contact of the three - gear conversion switch; the other end of the coil of the second up control relay group is connected to the second moving contact of the three - gear conversion switch; One end of the coil of the first down control relay group and one end of the coil of the second down control relay group are both connected to the other end of the normally - closed contact of relay KA1; the other end of the coil of the first down control relay group is respectively connected to the first moving contact of the three - gear conversion switch; the other end of the coil of the second down control relay group is connected to the second moving contact of the three - gear conversion switch; One end of the coil of the relay KA6 is connected to the other end of the normally closed contact of the relay KA2 through the diode D14, and the other end of the coil of the relay KA6 is connected to the first moving contact of the three-position changeover switch; one end of the relay KA13 is connected to the other end of the normally closed contact of the relay KA1 through the diode D16, and the other end of the coil of the relay KA13 is connected to the second moving contact of the three-position changeover switch; one end of the coil of the relay KA6 is also connected to one end of the relay KA13; The static contact of the three-position changeover switch is connected to the negative pole of the control power supply; The first rising control relay group, the second rising control relay group, the first falling control relay group, and the second falling control relay group each include three high-power relays, and the coils of the three high-power relays are connected in parallel; A first travel switch and a second travel switch are connected in series between the other end of the rising control button and one end of the normally closed contact of the relay KA2.

2. The electric box of the construction hanging basket according to claim 1, characterized in that, The electric box further includes: diode D18, diode D20, diode D19, and diode D21; The diode D18 is connected in series in the forward direction between the other end of the coil of the first rising control relay group and the first moving contact of the three-position changeover switch; The diode D20 is connected in series in the forward direction between the other end of the coil of the second rising control relay group and the second moving contact of the three-position changeover switch; The diode D19 is connected in series in the forward direction between the other end of the coil of the first falling control relay group and the first moving contact of the three-position changeover switch; The diode D21 is connected in series in the forward direction between the other end of the coil of the second falling control relay group and the second moving contact of the three-position changeover switch.

3. The electric box of the construction hanging basket according to claim 1, characterized in that, The first rising control relay group is reversely connected in parallel with the diode D8, the second rising control relay group is reversely connected in parallel with the diode D10, the first falling control relay group is reversely connected in parallel with the diode D9, and the second falling control relay group is reversely connected in parallel with the diode D11; The relay KA1 is reversely connected in parallel with the diode D6, and the relay KA2 is reversely connected in parallel with the diode D7; The relay KA6 is reversely connected in parallel with the diode D12, and the relay KA13 is reversely connected in parallel with the diode D13.

4. The electric box of the construction hanging basket according to claim 1, characterized in that The electric box further includes: light-emitting diode D2, light-emitting diode D3, resistor R2, and resistor R3; The light-emitting diode D2 and the resistor R2 are connected in series and then connected in parallel with the coil of the relay KA1; The light-emitting diode D3 and the resistor R3 are connected in series and then connected in parallel with the coil of the relay KA2.

5. The electric box for construction hanging basket according to claim 1, characterized in that, The electric box further includes: light-emitting diode D4, light-emitting diode D5, resistor R4, and resistor R5; The light-emitting diode D4 and the resistor R4 are connected in series and then connected in parallel with the first travel switch; The light-emitting diode D5 and the resistor R5 are connected in series and then connected in parallel with the second travel switch.

6. The electric box of the building hanging basket according to claim 1, characterized in that The control power supply includes: a full-wave bridge rectifier, an electrolytic capacitor, a light-emitting diode D1, and a resistor R1; The input end of the full-wave bridge rectifier is connected to an AC power supply, and the output end of the full-wave bridge rectifier is connected in parallel with the electrolytic capacitor; The light-emitting diode D1 and the resistor R1 are connected in series and then connected in parallel with the electrolytic capacitor.

7. The electric control box for construction hanging basket according to claim 1, characterized in that, The electric box further includes: a box body; The interlock relay group, the first ascending control relay group, the second ascending control relay group, the first descending control relay group, the second descending control relay group, and the brake control relay group are all arranged inside the box body; The ascending control button, the descending control button, and the three-position conversion switch are all arranged on the box body.

8. A control circuit board for a building hanging basket, characterized in that, The control circuit board is provided with an interlock relay group, a first ascending control relay group, a second ascending control relay group, a first descending control relay group, a second descending control relay group, and a brake control relay group; The connection relationship of the interlock relay group, the first ascending control relay group, the second ascending control relay group, the first descending control relay group, the second descending control relay group, and the brake control relay group is the same as that of the interlock relay group, the first ascending control relay group, the second ascending control relay group, the first descending control relay group, the second descending control relay group, and the brake control relay group of the electric box of the construction hanging basket described in Claim 1.

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