Elevator control device capable of automatically triggering overhaul signal when bottom landing door is opened

Abstract

The utility model discloses an elevator control device capable of automatically triggering an overhaul signal by opening a bottom landing door in the technical field of elevator overhaul, and the elevator control device comprises a landing door opening detection switch S1, a lift car position detection switch S2, an overhaul reset key switch SH and an overhaul signal triggering relay K1, the landing door opening detection switch S1 is connected to the upper end of a bottom landing door device; the car position detection switch S2 is connected to a bottom layer elevator car guide rail, and the overhaul reset key switch SH is connected to the wall face of a bottom layer landing doorway. A normally-open contact of the landing door opening detection switch S1, a normally-closed contact of the lift car position detection switch S2, a normally-closed contact of the maintenance reset key switch SH and a coil of the maintenance signal trigger relay K1 are connected to a direct-current 24V power supply circuit in series. A normally open contact of the landing door opening detection switch S1 is connected in series with a normally closed contact of the car position detection switch S2 and then is connected in parallel with a normally open contact of the maintenance signal trigger relay K1, and a normally closed contact of the maintenance signal trigger relay K1 and a normally closed contact of the maintenance switch are connected in series in a maintenance loop.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator maintenance, in particular to an elevator control device for automatically triggering a maintenance signal when the bottom landing door is opened. Background Art

[0002] The maintenance operation of an elevator is an operation mode of the elevator, which plays an important role in installation, commissioning, daily maintenance, inspection, and rescue in the elevator failure state. Usually, before the elevator operators enter the pit for operation, they must verify the effectiveness of the electrical safety devices for locking and closing the bottom landing door of the elevator and the emergency stop switch at the pit entrance to ensure that the elevator will not malfunction when the operators enter the pit, so as to ensure the safety of the operators. This operation process is not only complicated and time-consuming, but also dangerous may occur if the operators do not operate the process properly. Content of the Utility Model

[0003] The utility model aims to provide an elevator control device for automatically triggering a maintenance signal when the bottom landing door is opened, so as to solve the problems of cumbersome, complicated and time-consuming verification process before the bottom layer operation of the existing elevator.

[0004] To solve the above technical problems, the utility model provides the following technical solution: An elevator control device for automatically triggering a maintenance signal when the bottom landing door is opened, including a landing door opening detection switch S1, a car position detection switch S2, a maintenance reset key switch SH, and a maintenance signal trigger relay K1. The landing door opening detection switch S1 is connected to the upper end of the bottom landing door device, the car position detection switch S2 is connected to the bottom elevator car guide rail, the maintenance reset key switch SH is connected to the wall surface at the bottom landing station entrance. The normally open contact of the landing door opening detection switch S1, the normally closed contact of the car position detection switch S2, the normally closed contact of the maintenance reset key switch SH, and the coil of the maintenance signal trigger relay K1 are connected in series on the DC 24V power supply loop. The normally open contact of the landing door opening detection switch S1 and the normally closed contact of the car position detection switch S2 are connected in series and then connected in parallel with the normally open contact of the maintenance signal trigger relay K1. The normally closed contact of the maintenance signal trigger relay K1 and the normally closed contact of the maintenance switch are connected in series in the maintenance loop.

[0005] Working principle of the utility model: When an operator needs to enter the pit for operation, just move the car away from the bottommost floor, directly open the bottom landing door, and the landing door opening detection switch S1 installed on the bottom landing door will be automatically turned on. The coil of the maintenance signal trigger relay K1 is energized, and the normally open contact of the maintenance signal trigger relay K1 in parallel with the landing door opening detection switch S1 and the car position detection switch S2 is closed to achieve self-locking. At the same time, the normally closed contact of the maintenance signal trigger relay K1 in series in the maintenance circuit is opened to trigger the maintenance signal, and the elevator automatically enters the maintenance state. When the operator exits the pit and closes the landing door, the operator uses the special elevator key to operate the maintenance reset switch SH installed near the landing, and the elevator can resume normal operation.

[0006] Beneficial effects of the utility model: This device is simple to operate, safe and reliable. It not only shortens the operation time for entering the pit, simplifies the operation process, improves work efficiency, but also ensures the safety of operators entering the pit. Description of the drawings

[0007] Figure 1 is a circuit schematic diagram of an elevator control device for automatically triggering a maintenance signal when opening the bottom landing door of the utility model;

[0008] Figure 2 is a right view cross-sectional view inside the elevator;

[0009] Figure 3 is a schematic diagram of the positions of the landing door opening detection switch S1 and the maintenance reset key switch SH. Specific implementation manners

[0010] The following is a further detailed description through specific implementation manners:

[0011] The reference numerals in the attached drawings of the specification include: bottom landing door 1, car position detection switch S2 2, car 3, landing door opening detection switch S1 4, maintenance reset key switch SH 5, normally open contact 6 of the maintenance signal trigger relay K1, coil 7 of the maintenance signal trigger relay K1, maintenance switch 8, normally closed contact 9 of the maintenance signal trigger relay K1.

[0012] The embodiment is basically as shown in the attached Figures 1-3As shown in the figure: An elevator control device for automatically triggering a maintenance signal when opening the bottom landing door, including a landing door opening detection switch S14, a car position detection switch S22, a maintenance reset key switch SH5, and a maintenance signal trigger relay K1. The landing door opening detection switch S14 is fixedly connected to the upper end of the bottom landing door 1 device. The car position detection switch S22 is connected to the guide rail of the bottom elevator car 3. The maintenance reset key switch SH5 is fixedly connected to the wall surface at the bottom landing station entrance. The normally open contact of the landing door opening detection switch S14, the normally closed contact of the car position detection switch S22, the normally closed contact of the maintenance reset key switch SH5, and the coil of the maintenance signal trigger relay K1 are connected in series on the DC 24V power supply circuit. The normally open contact of the landing door opening detection switch S14 and the normally closed contact of the car position detection switch S22 are connected in series and then connected in parallel with the normally open contact of the maintenance signal trigger relay K1. The normally closed contact of the maintenance signal trigger relay K1 and the normally closed contact of the maintenance switch 8 are connected in series in the maintenance circuit.

[0013] The specific implementation process is as follows: After the device is installed on the elevator, when the operator needs to enter the pit for operation, only need to move the car 3 away from the bottommost floor and directly open the bottom landing door. The landing door opening detection switch S14 installed on the landing door is automatically turned on, triggering the coil 7 of the maintenance signal trigger relay K1 to be energized. The normally open contact 6 of the maintenance signal trigger relay K1 in the relay coil circuit closes to achieve self-locking. At the same time, the normally closed contact 9 of the maintenance signal trigger relay K1 is disconnected, triggering the maintenance signal, and the elevator automatically enters the maintenance state. When the operator exits the pit and closes the landing door, the operator uses the special elevator key to operate the maintenance reset key switch SH5 installed near the landing station, and the elevator can resume normal operation. To prevent the maintenance signal from being triggered when the elevator normally runs to the bottom floor and opens the door, a car position detection switch S22 is set at the bottom floor. When the elevator normally opens the door at the bottom floor, since the car position detection switch S22 is disconnected, the coil 7 of the maintenance signal trigger relay K1 cannot be energized, and the K1 relay does not operate, effectively preventing the elevator from malfunctioning during maintenance when opening the door normally at the bottom floor.

[0014] The above are only the embodiments of the present invention. Common general knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners in the specification can be used to explain the content of the claims.

Claims

1. An elevator control device that automatically triggers a maintenance signal when the bottom floor door is opened, characterized in that: It includes a floor door opening detection switch S1, a car position detection switch S2, an inspection and repositioning key switch SH and a triggering maintenance signal relay K1. The floor door opening detection switch S1 is connected to the upper end of the bottom floor door device, the car position detection switch S2 is connected to the bottom elevator car guide rail, the inspection and repositioning key switch SH is connected to the wall of the bottom floor station door, the normally open contact of the floor door opening detection switch S1 and the normally closed contact of the car position detection switch S2, the normally closed contact of the inspection and repositioning key switch SH, and the coil of the maintenance signal triggering relay K1 are connected in series on the DC 24V power supply circuit, the normally open contact of the floor door opening detection switch S1 and the normally closed contact of the car position detection switch S2 are connected in series and then connected in parallel with the normally open contact of the maintenance signal triggering relay K1, and the normally closed contact of the maintenance signal triggering relay K1 and the normally closed contact of the maintenance switch are connected in series in the maintenance circuit.

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