A power supply and drive control device for a portable elevator

Abstract

This invention discloses a portable elevator power supply and drive control device, comprising a portable housing. A power supply and drive control system for controlling the elevator is housed within the housing. This system is powered by a 380V industrial power line. A power supply terminal is located on the portable housing, and a power cord is fixedly connected to this terminal. The power cord is wound on a cable reel, with sufficient length of cord pre-installed on the reel. This allows the housing to be easily moved to the vicinity of the target elevator to be controlled. The power supply and drive control system of the portable housing is then connected to the target elevator for power supply and drive control. This invention can control multiple elevators in different locations, achieving equipment sharing. The circuitry is concentrated inside the portable housing and secured, preventing wire movement when operators plug in or unplug sockets, thus solving the problem of short circuits and eliminating safety hazards.

Description

Technical Field

[0001] This invention relates to the field of electrical control and power supply technology, and in particular to a power supply and drive control device for a mobile elevator. Background Technology

[0002] For some large systems with multiple lifts, stepper motors are used to control the travel. During use, issues such as damage to the control box, limit switches, and short circuits in explosion-proof sockets due to inadequate control have occurred. To address these issues, it is unnecessary to equip each lift with its own control box. Therefore, a portable lift power supply device should be designed to solve the existing problems and avoid the need for maintenance of multiple lift control systems. Summary of the Invention

[0003] The purpose of this invention is to address the technical deficiencies in the existing technology by providing a power supply and drive control device for a mobile elevator.

[0004] The technical solution adopted to achieve the purpose of this invention is:

[0005] A portable elevator power supply and drive control device includes a portable housing. A power supply and drive control system for controlling the elevator is installed within the housing. This system is powered by a 380V industrial power line. A power supply terminal is provided on the portable housing, and the 380V industrial power line is fixedly connected to it. The power line is wound on a cable reel, with a sufficient length of cable pre-installed on the reel. This allows the housing to be easily moved to the vicinity of the target elevator to be controlled, and the power supply and drive control system of the portable housing can then be connected to the target elevator for power supply and drive control.

[0006] In the above technical solution, an access point for the upward limit switch SQ1 and an access point for the downward limit switch SQ12 are provided on the movable housing to connect the signals of the upward limit switch SQ1 and the downward limit switch SQ12 of the target elevator to the power supply and drive control system of the movable housing.

[0007] In the above technical solution, the power supply and drive control system includes a frequency converter, a contactor KM1, and an AC-DC converter. The power consumption terminals L11, L12, and L13 of the frequency converter are connected to the power supply terminals L11, L12, and L13 via contactor KM1 and circuit breaker QF1. The PE terminal of the frequency converter is connected to the PE terminal of the power supply terminal. A power indicator light HR1 is connected between L11 and L13 of the power supply terminal to display whether the power supply terminal is normal in real time. The U1, V1, and W1 output terminals of the frequency converter are led to a connector, which enables connection to an external controlled target elevator.

[0008] L11 and L13 of the power supply terminal are connected to the AC input terminal of the AC-DC converter after passing through the circuit breaker QF1. The PE terminal of the AC-DC converter is connected to the PE terminal of the power supply terminal. The positive terminal of the DC output of the AC-DC converter is connected to the power control button SA2. The power control button SA2 is used as the main control of the DC output of the AC-DC converter.

[0009] The output of the power control button SA2 is connected to the coil of the contactor KM1 via the first branch and then to the negative DC output of the AC-DC converter. When the power control button SA2 is pressed, the coil of the contactor KM1 is energized, and then the contactor KM1 closes, so that the power supply terminals L11, L12 and L13 of the frequency converter are energized.

[0010] The output of the power control button SA2 is connected to the stop button SB1 via a second branch. The output of the stop button SB1 is connected to the upward running and indicating branch, the downward running and indicating branch, the upward arrival detection and indicating branch, and the downward arrival detection and indicating branch. The output of the stop button SB1 is also connected to the frequency converter via the jog / constant speed selection button SB4, which controls the frequency converter to perform jog or constant speed control on the target elevator. The output of the stop button SB1 is also connected to the frequency converter via the jog control knob SA1, which is used to control the upward jog control and downward jog control of the target elevator.

[0011] In the above technical solution, the upward operation and indication branch includes: a normally open contact of the upward button SB2, a normally closed contact of the downward button SB3, a normally closed contact of the third relay KA3, and a coil contact of the first relay KA1 connected in series. The normally open contact of the first relay KA1 is connected in parallel to the normally open contact of the upward button SB2, and an upward indicator light HG1 is connected in parallel to the coil contact of the first relay KA1. The normally open contact of the first relay KA1 is connected to the D11 input terminal of the frequency converter. When the upward button SB2 is closed and the downward button SB3 is open, the upward indicator light HG1 illuminates, the coil of the first relay KA1 is energized, and the normally open contact of the first relay KA1 closes, so that the D11 input terminal of the frequency converter receives an electrical signal, causing the frequency converter to control the target elevator to move upward.

[0012] In the above technical solution, the downward operation and indication branch includes: a normally open contact of the downward button SB3, a normally closed contact of the upward button SB2, a normally closed contact of the fourth relay KA4, and a coil contact of the second relay KA2 connected in series. The normally open contact of the second relay KA2 is connected in parallel to the normally open contact of the downward button SB3, and a downward indicator light HG2 is connected in parallel to the coil contact of the second relay KA2. The normally open contact of the second relay KA2 is connected to the D12 input terminal of the frequency converter. When the downward button SB3 is closed and the upward button SB2 is open, the downward indicator light HG2 illuminates, the coil of the second relay KA2 is energized, and the normally open contact of the second relay KA2 closes, so that the D12 input terminal of the frequency converter receives an electrical signal, causing the frequency converter to control the target elevator to descend.

[0013] In the above technical solution, the upward positioning detection and indication branch includes: the access contact of the upward limit switch SQ1 and the coil contact of the third relay KA3 connected in series, and the coil contact of the third relay KA3 and the upper limit indicator HR3 connected in parallel. During operation, the access contact of the upward limit switch SQ1 is connected to the upward limit switch SQ1 on the target elevator. When the upward limit switch SQ1 is triggered and closed, the upward positioning detection and indication branch is activated, and the upper limit indicator HR3 illuminates, indicating that the elevator has reached the upper limit position. Furthermore, after the coil contact of the third relay KA3 in the upward positioning detection and indication branch closes, the normally closed contact of the third relay KA3 in the upward operation and indication branch will open, thereby disconnecting the upward operation and indication branch and stopping the elevator's upward movement.

[0014] In the above technical solution, the descent arrival detection and indication branch includes: the access contact of the descent limit switch SQ2 and the coil contact of the fourth relay KA4 connected in series, and the coil contact of the fourth relay KA4 and the lower limit indicator light HR4 connected in parallel. During operation, the access contact of the descent limit switch SQ2 is connected to the descent limit switch SQ2 on the target elevator. When the descent limit switch SQ2 is triggered and closed, the descent arrival detection and indication branch is activated, and the lower limit indicator light HR4 illuminates, indicating that the elevator has reached the lower limit position. Furthermore, after the coil contact of the fourth relay KA4 in the descent arrival detection and indication branch closes, the normally closed contact of the fourth relay KA4 in the descent operation and indication branch will open, thereby disconnecting the descent operation and indication branch and stopping the elevator's descent.

[0015] In the above technical solution, the jog control knob SA1 is a self-resetting three-position knob, including a left position, a middle position, and a right position, which are manually adjusted by manual operation. When the jog / constant speed selection button SB4 is pressed and under jog control, when SA1 is in the left position, the D13 input terminal of the frequency converter is connected, and the frequency converter generates running control for the target; when SA1 is in the right position, the D14 input terminal of the frequency converter is connected, and the frequency converter generates running control for the target; when the hand is released, it self-resets to the middle position, which is an unconnected state.

[0016] In the above technical solution, the S+ terminal of the frequency converter is connected to the S1 and S2 terminals of the frequency converter via the emergency stop button SB5 for emergency stop control.

[0017] In the above technical solution, the movable housing is provided with an operation panel, and the stop button SB1, up button SB2, down button SB3, jog / constant speed selection button SB4, emergency stop button SB5, jog control knob SA1, power control button SA2, power indicator HR1, stop indicator HR2, upper limit indicator HR3, lower limit indicator HR4, up indicator HG1, and down indicator HG2 are all provided on the operation panel.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The portable elevator power supply and drive control device of this invention can control multiple elevators in different locations, realizing equipment sharing. The 380V circuit of the elevator movement control device is concentrated inside the portable housing and is fixed in place, so that the wiring will not move when the operator plugs in the socket, solving the problem of socket short circuit and eliminating safety hazards; it also solves the problem of frequent maintenance of elevator control box and improves work efficiency. Attached Figure Description

[0020] Figure 1 The diagram shown is a circuit diagram of the power supply and drive control system of the portable elevator power supply and drive control device of the present invention.

[0021] Figure 2 The diagram shown is a schematic of the operation panel on the movable housing of the present invention. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0023] A portable elevator power supply and drive control device includes a portable housing. A power supply and drive control system for controlling the elevator is installed within the housing. This system is powered by a 380V industrial power line. The portable housing has a power supply terminal fixedly connected to a 380V industrial power line (a three-phase four-wire system consisting of L11, L12, L13, and PE). The power line is wound on a cable reel with sufficient length of cable pre-installed. This allows the housing to be easily moved to the vicinity of the target elevator to be controlled, and the power supply and drive control system of the portable housing can then be connected to the target elevator for power supply and drive control.

[0024] See appendix Figure 1 The power supply and drive control system includes a frequency converter, a contactor KM1, an AC-DC converter, a first relay KA1, a second relay KA2, a third relay KA3, a fourth relay KA4, a stop button SB1, an up button SB2, a down button SB3, a jog / constant speed selection button SB4, an emergency stop button SB5, a jog control knob SA1, a power control button SA2, a power indicator HR1, a stop indicator HR2, an upper limit indicator HR3, a lower limit indicator HR4, an up indicator HG1, a down indicator HG2, and the access contacts of the up limit switch SQ1 and the down limit switch SQ12.

[0025] The inverter's power terminals L11, L12, and L13 are connected to the power supply terminals L11, L12, and L13 via contactor KM1 and circuit breaker QF1. The inverter's PE terminal is connected to the power supply terminal's PE terminal. A power indicator light HR1 is connected between L11 and L13 on the power supply terminal to display the real-time status of the power supply. The inverter's U1, V1, and W1 output terminals are connected to a connector, which allows connection to an external controlled elevator.

[0026] L11 and L13 on the power supply side are connected to the AC input side of the AC-DC converter after passing through the circuit breaker QF1. The PE side of the AC-DC converter is connected to the PE side of the power supply side. The positive DC output (24V+) of the AC-DC converter is connected to the power control button SA2. The power control button SA2 is used as the main control of the DC output of the AC-DC converter.

[0027] The output of the power control button SA2 is connected to the coil of the contactor KM1 via the first branch and then to the negative DC output terminal (0V-) of the AC-DC converter. When the power control button SA2 is pressed, the coil of the contactor KM1 is energized, and the contactor KM1 closes, energizing the power terminals L11, L12, and L13 of the frequency converter.

[0028] The output of power control button SA2 is connected to stop button SB1 via a second branch. The output of stop button SB1 is connected to subsequent circuitry, thus enabling stop button SB1 to function as the master switch. Specifically, as follows:

[0029] The output of the stop button SB1 is connected to an upward operation and indication branch. This upward operation and indication branch includes: a normally open contact of the upward button SB2, a normally closed contact of the downward button SB3, a normally closed contact of the third relay KA3, and a coil contact of the first relay KA1, connected in series. A normally open contact of the first relay KA1 is connected in parallel to the normally open contact of the upward button SB2, and an upward indicator light HG1 is connected in parallel to the coil contact of the first relay KA1. The normally open contact of the first relay KA1 is connected to the D11 input terminal of the frequency converter. When the upward button SB2 is closed and the downward button SB3 is open, the upward indicator light HG1 illuminates, the coil of the first relay KA1 is energized, and the normally open contact of the first relay KA1 closes, resulting in an electrical signal at the D11 input terminal of the frequency converter, causing the frequency converter to control the target elevator to move upward.

[0030] The output of the stop button SB1 is also connected to a down-running and indicator branch. This down-running and indicator branch includes: a normally open contact of the down-running button SB3, a normally closed contact of the up-running button SB2, a normally closed contact of the fourth relay KA4, and a coil contact of the second relay KA2, connected in series. A normally open contact of the second relay KA2 is connected in parallel to the normally open contact of the down-running button SB3, and a down-running indicator light HG2 is connected in parallel to the coil contact of the second relay KA2. The normally open contact of the second relay KA2 is connected to the D12 input terminal of the frequency converter. When the down-running button SB3 is closed and the up-running button SB2 is open, the down-running indicator light HG2 illuminates, the coil of the second relay KA2 is energized, and the normally open contact of the second relay KA2 closes, resulting in an electrical signal at the D12 input terminal of the frequency converter, causing the frequency converter to control the target elevator to descend.

[0031] The output of the stop button SB1 is also connected to an upward positioning detection and indication branch. This branch includes: the input contact of the upward limit switch SQ1 connected in series with the coil contact of the third relay KA3, and the coil contact of the third relay KA3 connected in parallel with the upper limit indicator light HR3. During operation, the input contact of the upward limit switch SQ1 is connected to the upward limit switch SQ1 on the target elevator. When the upward limit switch SQ1 is triggered and closed, the upward positioning detection and indication branch is activated, and the upper limit indicator light HR3 illuminates, indicating that the elevator has reached the upper limit position. Furthermore, after the coil contact of the third relay KA3 in the upward positioning detection and indication branch closes, the normally closed contact of the third relay KA3 in the upward operation and indication branch opens, thereby disconnecting the upward operation and indication branch and stopping the elevator's upward movement.

[0032] The output of the stop button SB1 is also connected to a downward positioning detection and indication branch. This branch includes: a series connection between the access contact of the downward limit switch SQ2 and the coil contact of the fourth relay KA4, and a parallel connection between the coil contact of the fourth relay KA4 and the lower limit indicator light HR4. During operation, the access contact of the downward limit switch SQ2 is connected to the downward limit switch SQ2 on the target elevator. When the downward limit switch SQ2 is triggered and closed, the downward positioning detection and indication branch is activated, and the lower limit indicator light HR4 illuminates, indicating that the elevator has reached the lower limit position. Furthermore, after the coil contact of the fourth relay KA4 in the downward positioning detection and indication branch closes, the normally closed contact of the fourth relay KA4 in the downward operation and indication branch will open, thereby disconnecting the downward operation and indication branch and stopping the elevator's descent.

[0033] The output of the stop button SB1 is also connected to the D15 input of the frequency converter via the jog / constant speed selection button SB4. The jog / constant speed selection button SB4 is used to control the frequency converter to perform jog or constant speed control on the target elevator.

[0034] The output of the stop button SB1 is also connected to the D13 and D14 input terminals of the frequency converter via the jog control knob SA1. The jog control knob SA1 is a self-resetting three-position knob, including a left position, a middle position, and a right position, which can be manually adjusted by manual operation. When the jog / constant speed selection button SB4 is pressed and under jog control, when SA1 is in the left position, the D13 input terminal of the frequency converter is connected, and the frequency converter generates running control for the target; when SA1 is in the right position, the D14 input terminal of the frequency converter is connected, and the frequency converter generates running control for the target; when the button is released, it self-resets to the middle position, which is an unconnected state.

[0035] Furthermore, the S+ terminal of the frequency converter is connected to the S1 and S2 terminals of the frequency converter via the emergency stop button SB5 for emergency stop control.

[0036] For further details, please see the appendix. Figure 2 The movable housing is equipped with an operation panel, on which the stop button SB1, up button SB2, down button SB3, jog / constant speed selection button SB4, emergency stop button SB5, jog control knob SA1, power control button SA2, power indicator HR1, stop indicator HR2, upper limit indicator HR3, lower limit indicator HR4, up indicator HG1, and down indicator HG2 are all located.

[0037] The present invention has been described above by way of example. It should be noted that any simple modifications, alterations or other equivalent substitutions that can be made by those skilled in the art without creative effort without departing from the core of the present invention fall within the protection scope of the present invention.

Claims

1. A power supply and drive control device for a portable elevator, characterized in that: The device includes a movable housing, within which a power supply and drive control system for controlling the elevator is installed. This power supply and drive control system is powered by a 380V industrial power line. A power supply terminal is provided on the movable housing, and the power supply terminal is fixedly connected to the 380V industrial power line. The power line is wound on a cable reel, and the cable reel has a sufficient length of power line reserved, so that the housing can be easily moved to a position near the target elevator to be controlled. Then, the power supply and drive control system of the movable housing can be connected to the target elevator to provide power and drive control for it. The power supply and drive control system includes a frequency converter, a contactor KM1, and an AC-DC converter. The power consumption terminals L11, L12, and L13 of the frequency converter are connected to the power supply terminals L11, L12, and L13 via contactor KM1 and circuit breaker QF1. The PE terminal of the frequency converter is connected to the PE terminal of the power supply terminal. A power indicator light HR1 is connected between L11 and L13 of the power supply terminal to display whether the power supply terminal is normal in real time. The output terminals U1, V1, and W1 of the frequency converter are led to a connector, which enables connection to an external controlled target elevator. L11 and L13 of the power supply terminal are connected to the AC input terminal of the AC-DC converter after passing through the circuit breaker QF1. The PE terminal of the AC-DC converter is connected to the PE terminal of the power supply terminal. The positive terminal of the DC output of the AC-DC converter is connected to the power control button SA2. The power control button SA2 is used as the main control of the DC output of the AC-DC converter. The output of the power control button SA2 is connected to the coil of the contactor KM1 via the first branch and then to the negative DC output of the AC-DC converter. When the power control button SA2 is pressed, the coil of the contactor KM1 is energized, and then the contactor KM1 closes, so that the power supply terminals L11, L12 and L13 of the frequency converter are energized. The output of the power control button SA2 is connected to the stop button SB1 via a second branch. The output of the stop button SB1 is connected to the upward running and indicating branch, the downward running and indicating branch, the upward arrival detection and indicating branch, and the downward arrival detection and indicating branch. The output of the stop button SB1 is also connected to the frequency converter via the jog / constant speed selection button SB4, which controls the frequency converter to perform jog or constant speed control on the target elevator. The output of the stop button SB1 is also connected to the frequency converter via the jog control knob SA1, which is used to control the upward jog control and downward jog control of the target elevator.

2. The power supply and drive control device for the portable elevator according to claim 1, characterized in that: An access point for an upward limit switch SQ1 and an access point for a downward limit switch SQ12 are provided on the movable housing to connect the signals of the upward limit switch SQ1 and the downward limit switch SQ12 of the target elevator to the power supply and drive control system of the movable housing.

3. The power supply and drive control device for the portable elevator according to claim 1, characterized in that: The upward operation and indication branch includes: a normally open contact of the upward button SB2, a normally closed contact of the downward button SB3, a normally closed contact of the third relay KA3, and a coil contact of the first relay KA1 connected in series. The normally open contact of the first relay KA1 is connected in parallel to the normally open contact of the upward button SB2, and an upward indicator light HG1 is connected in parallel to the coil contact of the first relay KA1. The normally open contact of the first relay KA1 is connected to the D11 input terminal of the frequency converter. When the upward button SB2 is closed and the downward button SB3 is open, the upward indicator light HG1 illuminates, the coil of the first relay KA1 is energized, and the normally open contact of the first relay KA1 closes, so that the D11 input terminal of the frequency converter receives an electrical signal, causing the frequency converter to control the target elevator to move upward.

4. The power supply and drive control device for the portable elevator according to claim 3, characterized in that: The downlink operation and indication branch includes: a normally open contact of the downlink button SB3, a normally closed contact of the uplink button SB2, a normally closed contact of the fourth relay KA4, and a coil contact of the second relay KA2 connected in series. The normally open contact of the second relay KA2 is connected in parallel to the normally open contact of the downlink button SB3, and a downlink indicator light HG2 is connected in parallel to the coil contact of the second relay KA2. The normally open contact of the second relay KA2 is connected to the D12 input terminal of the frequency converter. When the downlink button SB3 is closed and the uplink button SB2 is open, the downlink indicator light HG2 illuminates, the coil of the second relay KA2 is energized, and the normally open contact of the second relay KA2 closes, so that the D12 input terminal of the frequency converter receives an electrical signal, causing the frequency converter to control the target elevator to descend.

5. The power supply and drive control device for the portable elevator according to claim 4, characterized in that: The upward positioning detection and indication branch includes: the access contact of the upward limit switch SQ1 and the coil contact of the third relay KA3 connected in series, and the coil contact of the third relay KA3 and the upper limit indicator HR3 connected in parallel. During operation, the access contact of the upward limit switch SQ1 is connected to the upward limit switch SQ1 on the target elevator. When the upward limit switch SQ1 is triggered and closed, the upward positioning detection and indication branch is turned on, and the upper limit indicator HR3 lights up, indicating that the elevator has reached the upper limit position. After the coil contact of the third relay KA3 in the upward positioning detection and indication branch is closed, the normally closed contact of the third relay KA3 in the upward operation and indication branch will open, thereby causing the upward operation and indication branch to be disconnected and stopping the elevator from moving upward.

6. The power supply and drive control device for the portable elevator according to claim 5, characterized in that: The descent arrival detection and indication branch includes: the access contact of the descent limit switch SQ2 and the coil contact of the fourth relay KA4 connected in series, and the coil contact of the fourth relay KA4 and the lower limit indicator light HR4 connected in parallel. During operation, the access contact of the descent limit switch SQ2 is connected to the descent limit switch SQ2 on the target elevator. When the descent limit switch SQ2 is triggered and closed, the descent arrival detection and indication branch is turned on, and the lower limit indicator light HR4 lights up, indicating that the elevator has reached the lower limit position. After the coil contact of the fourth relay KA4 in the descent arrival detection and indication branch is closed, the normally closed contact of the fourth relay KA4 in the descent operation and indication branch will open, thereby causing the descent operation and indication branch to be disconnected and stopping the elevator from descending.

7. The power supply and drive control device for the portable elevator according to claim 6, characterized in that: The jog control knob SA1 is a self-resetting three-position knob, including a left position, a middle position, and a right position. The position of SA1 can be manually adjusted by manual operation. When the jog / constant speed selection button SB4 is pressed and jog control is enabled, when SA1 is in the left position, the D13 input terminal of the frequency converter is connected, and the frequency converter generates running control for the target. When SA1 is in the right position, the D14 input terminal of the frequency converter is connected, and the frequency converter generates running control for the target. When the button is released, it self-resets to the middle position, which is an unconnected state.

8. The power supply and drive control device for the portable elevator according to claim 7, characterized in that: The S+ terminal of the frequency converter is connected to the S1 and S2 terminals of the frequency converter via the emergency stop button SB5 for emergency stop control.

9. The power supply and drive control device for the portable elevator according to claim 8, characterized in that: The movable housing is equipped with an operation panel.

10. The power supply and drive control device for the portable elevator according to claim 9, characterized in that: The stop button SB1, up button SB2, down button SB3, jog / constant speed selection button SB4, emergency stop button SB5, jog control knob SA1, power control button SA2, power indicator HR1, stop indicator HR2, upper limit indicator HR3, lower limit indicator HR4, up indicator HG1, and down indicator HG2 are all located on the operation panel.

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