Pulse type multi-layer elevator

Abstract

The pulse type multi-layer elevator comprises a frequency converter, a driving motor and a brake, one side of the frequency converter is connected with a three-phase power source, and the other side of the frequency converter is connected with a vertical lifting motor and the brake; a main body frame of the pulse type multi-layer elevator crosses a multi-layer floor, elevator trays which are driven by a driving motor to move up and down in a reciprocating mode are arranged in the main body frame, and elevator tray detection sensors are arranged between the layers of the main body frame. A contactor is arranged between the three-phase power supply and the brake, the signal input end of the contactor is connected with the elevator tray detection sensor, and the contactor is in signal connection with the frequency converter and receives and feeds back synchronous control signals. Compared with the prior art, the brake timing of the elevator can be effectively controlled, it is guaranteed that the elevator acts smoothly, and the phenomenon that goods fall off from the elevator is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of logistics and transportation, and in particular to a pulse-type multi-layer elevator. Background Art

[0002] An elevator is a mechanical device for transporting objects vertically. In industrial production, multi-story elevators can connect production lines and assembly lines between different floors to transport materials between different floors.

[0003] For example, according to the solution disclosed in Chinese patent application CN202010808479.7, the currently used multi-layer elevators are generally chain-driven, with the motor driving the chain and the pallet to achieve multi-layer up and down transportation of items. However, the existing multi-layer elevators lack effective monitoring of the pallet lifting process. The rapid acceleration and deceleration of the elevator between floors will impact the motor and the frame. If the elevator brakes untimely, the pallet will be difficult to align with the upstream and downstream logistics transmission equipment on the floor, or it will cause the transported goods to fall. Summary of the invention

[0004] The object of the present invention is to overcome the defects of the above-mentioned prior art and provide a pulse type multi-layer elevator.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A pulse type multi-storey elevator comprises a frequency converter, a drive motor and a brake. One side of the frequency converter is connected to a three-phase power supply, and the other side is respectively connected to a vertical lifting motor and a brake. The main frame of the pulse type multi-storey elevator spans multiple floors, and a hoist tray driven by a drive motor to reciprocate up and down is arranged in the main frame.

[0007] The main frame is provided with a hoist pallet detection sensor between each floor; a contactor is provided between the three-phase power supply and the brake, the signal input end of the contactor is connected to the hoist pallet detection sensor, and the contactor is connected to the inverter signal to receive and feed back the synchronous control signal.

[0008] As a preferred technical solution, a pair of loading start and stop switches and a pair of unloading start and stop switches are respectively provided on each floor of the main frame, and the switches are respectively controlled and connected with the upstream and downstream conveying devices.

[0009] As a preferred technical solution, the main frame is provided with an interference detection sensor at the upper and lower positions close to the floor at each floor.

[0010] As a preferred technical solution, the interference detection sensor is a proximity switch.

[0011] As a preferred technical solution, the frequency converter is connected to a high-frequency braking resistor, and a rectifier is provided between the contactor and the brake.

[0012] As a preferred technical solution, an item detection photoelectric device is provided in the elevator tray.

[0013] As a preferred technical solution, the object detection photoelectric device is provided with two groups, and the two groups of the object detection photoelectric devices are arranged in parallel.

[0014] As a preferred technical solution, an object falling detection photoelectric device is arranged at the bottom of the main frame, below the lowest position of the elevator tray.

[0015] As a preferred technical solution, the photoelectric devices for detecting object falling are provided in two groups, and the two groups of photoelectric devices for detecting object falling are provided in parallel.

[0016] As an optimal technical solution, the signal receiving interface of the frequency converter includes: an input interface for motor forward, reverse, high-speed and low-speed operation signals; the signal output interface of the frequency converter includes: an output interface for the start and stop signals of the hoist.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The pulse multi-storey elevator proposed in the present invention can realize the smooth transportation of goods between multiple floors. The contact switch and contactor are used to control the braking time of the elevator, which can ensure the smooth movement of the elevator and avoid the phenomenon of goods falling from the elevator. The present invention is also provided with photoelectric and interference detection sensors for detecting the abnormality of the elevator working process and reminding the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the pulse multi-layer elevator of the present invention;

[0020] Figure 2 It is the electrical design drawing of the pulse multi-storey elevator of the present invention. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0022] Example 1

[0023] like Figure 1As shown, the pulse multi-storey elevator provided by the present invention includes a main frame spanning multiple floors, and a hoist tray is arranged in the main frame, which is driven by a driving motor to reciprocate between the main frame and each floor. Two sets of object detection photoelectric sensors are arranged in parallel in the hoist tray to detect whether the cargo area is loaded in the hoist tray.

[0024] The main frame is provided with a pair of loading start and stop switches and a pair of unloading start and stop switches on each floor. These switches are respectively connected to the upstream and downstream conveying devices of the corresponding floors to realize linkage control of the loading and unloading process of the elevator.

[0025] The main frame is provided with an interference detection sensor at the upper and lower positions near the floor of each floor. The interference detection sensor adopts a proximity switch. If an object is detected approaching when the hoist pallet is loading on that floor, a stop command is issued to avoid a collision.

[0026] The main frame is provided with hoist pallet detection sensors between each layer. These hoist pallet detection sensors adopt proximity switches to detect the position of the lowering pallet and then control the braking timing through contactors.

[0027] At the bottom of the main frame, below the lowest position of the elevator pallet, there are two sets of item drop detection photoelectric sensors. The two sets of item drop detection photoelectric sensors are arranged parallel to the width direction of the main frame. When the goods loaded on the elevator pallet fall from above, the item drop detection photoelectric sensors will be triggered and the staff will be reminded and alarmed.

[0028] like Figure 2 As shown, the main components of the circuit part of the pulse multi-storey elevator of the present invention include: frequency converter, contactor, drive motor and brake. The three-phase power supply provides three-phase power supply for the vertical lifting drive motor of the pulse multi-storey elevator after passing through the frequency converter U1; for the brake, the three-phase power supply first passes through a contactor KM1, and then rectified by a rectifier to supply power to the brake. A DSC isolation switch box is set between the frequency converter U1 and the drive motor and between the contactor KM1 and the rectifier.

[0029] The inverter is connected to an encoder and a high-frequency braking resistor R1. The inverter's signal receiving interface includes: input interfaces for rising, falling, motor high speed, and motor low speed signals; the inverter's signal output interface includes: output interfaces for hoist start and stop signals. It can realize functions such as precise start and stop, precise acceleration and deceleration, and abnormal reset for controlling pulse multi-layer elevators.

[0030] The signal input end of contactor KM1 is connected to the hoist pallet detection sensor, and the inverter is connected to the contactor KM1 and the inverter U1 signal to receive and feedback the output synchronization control signal. The timing of brake activation is controlled through contactor KM1 by using the proximity switch of the lowering pallet to prevent the hoist from slipping.

[0031] In this embodiment, the model of the drive motor is MGA30040; the model of the frequency converter is FC-360H15KT4E20H2BXCDXXSXXXXAXBX; and the model of the encoder is MG450.

[0032] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A pulse type multi-storey elevator, comprising a frequency converter, a drive motor and a brake, wherein one side of the frequency converter is connected to a three-phase power supply, and the other side is respectively connected to a vertical lifting motor and a brake; the main frame of the pulse type multi-storey elevator spans multiple floors, and a hoist tray driven by a drive motor to reciprocate up and down is arranged in the main frame, characterized in that: The main frame is provided with a hoist pallet detection sensor between each floor; a contactor is provided between the three-phase power supply and the brake, the signal input end of the contactor is connected to the hoist pallet detection sensor, and the contactor is connected to the inverter signal to receive and feed back the synchronous control signal.

2. The pulse multi-layer elevator according to claim 1, characterized in that: A pair of loading start and stop switches and a pair of unloading start and stop switches are respectively arranged on each floor of the main frame, and the switches are respectively connected to the control of the upstream and downstream conveying devices.

3. The pulse type multi-layer elevator according to claim 1, characterized in that: The main frame is provided with an interference detection sensor at the upper and lower positions close to the floor of each floor.

4. The pulse type multi-layer elevator according to claim 3, characterized in that: The interference detection sensor is a proximity switch.

5. The pulse type multi-layer elevator according to claim 1, characterized in that: The frequency converter is connected to a high-frequency braking resistor, and a rectifier is arranged between the contactor and the brake.

6. The pulse type multi-storey elevator according to claim 1, characterized in that: The elevator tray is provided with an article detection photoelectric device.

7. The pulse type multi-storey elevator according to claim 6, characterized in that: The object detection photoelectric device is provided with two groups, and the two groups of object detection photoelectric devices are arranged in parallel.

8. The pulse type multi-storey elevator according to claim 1, characterized in that: The bottom of the main frame is provided with an article falling detection photoelectric device below the lowest position of the elevator tray.

9. The pulse type multi-storey elevator according to claim 8, characterized in that: The photoelectric sensors for detecting object falling are arranged in two groups, and the two groups of photoelectric sensors for detecting object falling are arranged in parallel.

10. The pulse type multi-storey elevator according to claim 1, characterized in that: The signal receiving interface of the frequency converter includes: an input interface for motor forward rotation, reverse rotation, high-speed operation and low-speed operation signals; the signal output interface of the frequency converter includes: an output interface for hoist start and stop signals.

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