CN220502353U - Elevator safety switch loop with change-over switch type short circuit detection function - Google Patents
Elevator safety switch loop with change-over switch type short circuit detection function Download PDFInfo
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- CN220502353U CN220502353U CN202322236424.5U CN202322236424U CN220502353U CN 220502353 U CN220502353 U CN 220502353U CN 202322236424 U CN202322236424 U CN 202322236424U CN 220502353 U CN220502353 U CN 220502353U
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Abstract
The utility model discloses an elevator safety switch loop with a change-over switch type short circuit detection function, which comprises: the device comprises a safety switch, a controllable single-pole double-throw switch, a controllable short-circuit executing switch, a voltage detection module and an elevator control box; safety switches are arranged corresponding to each floor, all the safety switches are connected in series to form a switch series circuit, one end of the switch series circuit is connected to a power supply, and the switch series circuit is connected to an elevator control box; the switch series circuit is also provided with controllable single-pole double-throw switches, and two ends of each safety switch are provided with controllable single-pole double-throw switches; two controllable single-pole double-throw switches are arranged between two adjacent safety switches, and the fixed end and the first movable end of each controllable single-pole double-throw switch are positioned on a switch series circuit. The elevator safety switch loop with the change-over switch type short circuit detection function solves the problem that in the prior art, the short circuit safety switch gives an error signal that an elevator landing door is closed when a relay normally gets on or off passengers.
Description
Technical Field
The utility model relates to an elevator safety switch loop, in particular to an elevator safety switch loop with a change-over switch type short circuit detection function.
Background
The landing door corresponding to each floor is opened and closed, a safety switch is arranged and indicates the corresponding landing door to be opened and closed, the safety switch is closed when the landing door is closed, the safety switch is opened when the landing door is opened, all the safety switches are connected in series to form a switch series circuit, one end of the switch series circuit is connected to a power supply, and the other end of the switch series circuit is connected to an elevator control box, so that the elevator control box is guaranteed to know whether the landing door is closed or not, and the elevator control box is lifted and lowered.
When the elevator is in rescue, because some landing doors cannot be normally closed, the elevator car is stopped at a certain non-passenger-taking position, a mode of shorting a corresponding safety switch is adopted, the elevator car is immediately operated to the passenger-taking position, and whether the elevator car is shorted is forgotten or not is often caused. Thus, a safety switch shorting detection is required.
Chinese patent discloses a safety door lock switch circuit of application number CN202121257666.7 with relay type short circuit detection function, the safety door lock switch circuit of relay type short circuit detection function includes: the safety door lock switches and the relays are connected in series to form a switch series circuit, each safety door lock switch is provided with a relay, the two ends of a normally open switch in each relay are respectively connected with the two ends of one safety door lock switch, the high-voltage end of the switch series circuit is connected to a power supply, the low-voltage end of the switch series circuit is connected to a load, the low-voltage end of the switch series circuit is connected to the input end of an elevator control box, and the output end of the elevator control box is connected to the control end of the relay.
Although the safety door lock switch circuit with the relay type short circuit detection function can realize short circuit detection, the safety door lock switch circuit with the relay type short circuit detection function still has the following defects: because the relay is connected in parallel outside the safety door lock switch, the relay is equivalent to a short-circuit safety door lock switch, the short-circuit safety door lock switch is not allowed in the circuit principle, meanwhile, if the relay runs incorrectly, the safety door lock switch is short-circuited, if an error signal that the elevator landing door is closed is obtained by the elevator control box (the relay short-circuit safety door lock switch) when passengers get on or off the elevator car, the safety accident of shearing people can occur, and the risk of running the elevator car is high.
Disclosure of Invention
The utility model provides an elevator safety switch loop with a change-over switch type short circuit detection function, which solves the problem that in the prior art, a short circuit safety switch gives an error signal that an elevator landing door is closed when a relay normally gets on or off a passenger.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model discloses an elevator safety switch loop with a change-over switch type short circuit detection function, which comprises: the device comprises a safety switch, a controllable single-pole double-throw switch, a controllable short-circuit executing switch, a voltage detection module and an elevator control box; safety switches are arranged corresponding to each floor, all the safety switches are connected in series to form a switch series circuit, one end of the switch series circuit is connected to a power supply, and the switch series circuit is connected to an elevator control box; the switch series circuit is also provided with controllable single-pole double-throw switches, and two ends of each safety switch are provided with controllable single-pole double-throw switches; two controllable single-pole double-throw switches are arranged between two adjacent safety switches, and the fixed end and the first movable end of each controllable single-pole double-throw switch are positioned on a switch series circuit; the second movable end of a controllable single-pole double-throw switch beside each safety switch is connected to one end of a controllable short-circuit executing switch, and the other end of the controllable short-circuit executing switch is connected to the second movable end of another controllable single-pole double-throw switch beside each safety switch; the controllable single-pole double-throw switch control end and the controllable short circuit executing switch control end are respectively connected to the first input end and the second input end of the elevator control box, the contact point of the switch series circuit and the elevator control box is connected to the input end of the voltage detection module, and the output end of the voltage detection module is connected to the elevator control box.
Preferably, the controllable shorting performing switch is a relay.
Preferably, the voltage detection module includes: the input end of the voltage reducing unit is connected to the contact point of the switch serial circuit and the elevator control box, the output end of the voltage reducing unit is connected to the input end of the photoelectric isolating unit, the output end of the photoelectric isolating unit is connected to the input end of the voltage detecting chip, and the output end of the voltage detecting chip is the output end of the voltage detecting module.
Preferably, the step-down unit includes: the voltage-reducing resistor R1 and the sampling resistor R2 are arranged, one end of the voltage-reducing resistor R1 is an input end of the voltage-reducing unit, the other end of the voltage-reducing resistor R1 is connected with one end of the sampling resistor R2, the other end of the sampling resistor R2 is grounded, and a contact point between the voltage-reducing resistor R1 and the sampling resistor R2 is an output end of the voltage-reducing unit.
Preferably, the photoelectric isolation unit includes: the photoelectric coupler U2, the resistor R3 and the resistor R4, wherein one end of the resistor R3 is the input end of the photoelectric isolation unit, the other end of the resistor R3 is connected to the positive electrode of the luminous side of the photoelectric coupler U2, the negative electrode of the luminous side of the photoelectric coupler U2 is grounded through the resistor R4, the positive electrode of the receiving side of the photoelectric coupler U2 is connected with a low-voltage power supply, and the negative electrode of the receiving side of the photoelectric coupler U2 is the output end of the photoelectric isolation unit.
Compared with the prior art, the utility model has the following beneficial effects:
in this application, break the tradition and just connect in parallel a controllable short circuit execution switch idea at the safety switch side, adopt single pole double throw switch, realized when needing to detect, in inserting the switch series circuit with controllable short circuit execution switch, when not needing to detect, not insert the switch series circuit with controllable short circuit execution switch, no matter how the controllable short circuit execution switch is disordered like this, also can not short circuit safety switch, guarantee the normal implementation of safety switch's function.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.
Drawings
Fig. 1 is a schematic circuit diagram of an elevator safety switching circuit with a change-over short-circuit detection function.
Fig. 2 is a schematic diagram of the power supply at the voltage detection module.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present utility model more clear and easy to understand, the present utility model is further described below with reference to the accompanying drawings and the detailed description:
as shown in fig. 1 and 2, the present utility model discloses an elevator safety switch circuit with a change-over switch type short circuit detection function, comprising: safety switches (K1, K2, … …, K4 and K6), controllable single-pole double-throw switches (SKA 1, SKA2, … …, SKA11 and SKA 12), a controllable short-circuit executing switch J1, a voltage detecting module and an elevator control box U1; safety switches are arranged corresponding to each floor, all the safety switches are connected in series to form a switch series circuit, one end of the switch series circuit is connected to a power supply, and the switch series circuit is connected to an elevator control box; the switch series circuit is also provided with controllable single-pole double-throw switches, and two ends of each safety switch are provided with controllable single-pole double-throw switches; two controllable single-pole double-throw switches are arranged between two adjacent safety switches, and the fixed end and the first movable end of each controllable single-pole double-throw switch are positioned on a switch series circuit; the second movable end of a controllable single-pole double-throw switch beside each safety switch is connected to one end of a controllable short-circuit executing switch, and the other end of the controllable short-circuit executing switch is connected to the second movable end of another controllable single-pole double-throw switch beside each safety switch; the controllable single-pole double-throw switch control end and the controllable short circuit executing switch control end are respectively connected to the first input end and the second input end of the elevator control box, the contact point of the switch series circuit and the elevator control box is connected to the input end of the voltage detection module, and the output end of the voltage detection module is connected to the elevator control box.
The controllable short-circuit executing switch is a relay. Realizing the running closing and opening under the control of the elevator control box.
The voltage detection module includes: the elevator control box comprises a voltage reducing unit, a photoelectric isolation unit and a voltage detection chip U3, wherein the input end of the voltage reducing unit is connected to a contact point of a switch serial circuit and an elevator control box, the output end of the voltage reducing unit is connected to the input end of the photoelectric isolation unit, the output end of the photoelectric isolation unit is connected to the input end of the voltage detection chip U3, and the output end of the voltage detection chip is the output end of the voltage detection module. The power supply connected with the switch series circuit is basically 110v voltage, so that the voltage reduction treatment is needed, the photoelectric isolation unit isolates the voltage reduction unit from the voltage detection chip, and the voltage detection chip cannot detect high voltage, so that the voltage detection chip is protected.
The step-down unit includes: the voltage-reducing resistor R1 and the sampling resistor R2 are arranged, one end of the voltage-reducing resistor R1 is an input end of the voltage-reducing unit, the other end of the voltage-reducing resistor R1 is connected with one end of the sampling resistor R2, the other end of the sampling resistor R2 is grounded, and a contact point between the voltage-reducing resistor R1 and the sampling resistor R2 is an output end of the voltage-reducing unit.
The photoelectric isolation unit includes: the photoelectric coupler U2, the resistor R3 and the resistor R4, wherein one end of the resistor R3 is the input end of the photoelectric isolation unit, the other end of the resistor R3 is connected to the positive electrode of the luminous side of the photoelectric coupler U2, the negative electrode of the luminous side of the photoelectric coupler U2 is grounded through the resistor R4, the positive electrode of the receiving side of the photoelectric coupler U2 is connected with a low-voltage power supply, and the negative electrode of the receiving side of the photoelectric coupler U2 is the output end of the photoelectric isolation unit.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.
Claims (5)
1. Take change over formula short circuit detection function's elevator safety switch return circuit, its characterized in that includes: the device comprises a safety switch, a controllable single-pole double-throw switch, a controllable short-circuit executing switch, a voltage detection module and an elevator control box;
safety switches are arranged corresponding to each floor, all the safety switches are connected in series to form a switch series circuit, one end of the switch series circuit is connected to a power supply, and the switch series circuit is connected to an elevator control box;
the switch series circuit is also provided with controllable single-pole double-throw switches, and two ends of each safety switch are provided with controllable single-pole double-throw switches;
two controllable single-pole double-throw switches are arranged between two adjacent safety switches, and the fixed end and the first movable end of each controllable single-pole double-throw switch are positioned on a switch series circuit; the second movable end of a controllable single-pole double-throw switch beside each safety switch is connected to one end of a controllable short-circuit executing switch, and the other end of the controllable short-circuit executing switch is connected to the second movable end of another controllable single-pole double-throw switch beside each safety switch;
the controllable single-pole double-throw switch control end and the controllable short circuit executing switch control end are respectively connected to the first input end and the second input end of the elevator control box, the contact point of the switch series circuit and the elevator control box is connected to the input end of the voltage detection module, and the output end of the voltage detection module is connected to the elevator control box.
2. The elevator safety switching circuit with a change-over type short circuit detection function according to claim 1, wherein the controllable short circuit executing switch is a relay.
3. The elevator safety switching circuit with a change-over type short circuit detection function according to claim 2, wherein the voltage detection module comprises: the input end of the voltage reducing unit is connected to the contact point of the switch serial circuit and the elevator control box, the output end of the voltage reducing unit is connected to the input end of the photoelectric isolating unit, the output end of the photoelectric isolating unit is connected to the input end of the voltage detecting chip, and the output end of the voltage detecting chip is the output end of the voltage detecting module.
4. The elevator safety switching circuit with a change-over type short circuit detection function according to claim 3, wherein the step-down unit includes: the voltage-reducing resistor R1 and the sampling resistor R2 are arranged, one end of the voltage-reducing resistor R1 is an input end of the voltage-reducing unit, the other end of the voltage-reducing resistor R1 is connected with one end of the sampling resistor R2, the other end of the sampling resistor R2 is grounded, and a contact point between the voltage-reducing resistor R1 and the sampling resistor R2 is an output end of the voltage-reducing unit.
5. The elevator safety switching circuit with a change-over type short-circuit detection function according to claim 4, wherein the photoelectric isolation unit comprises: the photoelectric coupler U2, the resistor R3 and the resistor R4, wherein one end of the resistor R3 is the input end of the photoelectric isolation unit, the other end of the resistor R3 is connected to the positive electrode of the luminous side of the photoelectric coupler U2, the negative electrode of the luminous side of the photoelectric coupler U2 is grounded through the resistor R4, the positive electrode of the receiving side of the photoelectric coupler U2 is connected with a low-voltage power supply, and the negative electrode of the receiving side of the photoelectric coupler U2 is the output end of the photoelectric isolation unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322236424.5U CN220502353U (en) | 2023-08-18 | 2023-08-18 | Elevator safety switch loop with change-over switch type short circuit detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322236424.5U CN220502353U (en) | 2023-08-18 | 2023-08-18 | Elevator safety switch loop with change-over switch type short circuit detection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220502353U true CN220502353U (en) | 2024-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322236424.5U Active CN220502353U (en) | 2023-08-18 | 2023-08-18 | Elevator safety switch loop with change-over switch type short circuit detection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220502353U (en) |
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2023
- 2023-08-18 CN CN202322236424.5U patent/CN220502353U/en active Active
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