An explosion-proof elevator door lock assembly

Abstract

The invention discloses an explosion-proof elevator car door lock assembly, comprising a car, a door machine bottom plate, a hanging plate, a door knife, a car door and a PLC control system, wherein the door machine bottom plate is fixed on the car, the hanging plate is driven by a motor, the car door is mounted on the hanging plate, the hanging plate drives the car door to open and close, the door knife is mounted on the front side of the hanging plate, and the door knife is used to lock and unlock the hanging plate to open and close. The beneficial effects of the invention are: through the combination of a first electrical limit switch assembly with a mechanical lock hook, a second electrical limit switch assembly and a third electrical limit switch assembly, two verifications are performed to determine whether the car door is opened or closed, thereby improving the safety of the car, and the insertion or separation of the limit switch and the striker will not generate sparks or thermal effects, thereby solving the spark problem generated by the exposed contact of the traditional switch copper sheet, so that the elevator door machine has an explosion-proof effect and meets the national requirements for explosion-proof elevators.

Description

Technical field:

[0001] The invention relates to the technical field of explosion-proof elevator car doors, in particular to an explosion-proof elevator car door lock assembly. Background technology:

[0002] The elevator door machine is a mechanism responsible for opening and closing the car door. When it receives the elevator door opening and closing signals, the elevator door machine controls the door opening motor through its own control system, converts the torque generated by the motor into a force in a specific direction, and closes or opens the door. However, the existing elevator door machine structure is only suitable for ordinary residential buildings, office buildings and other buildings, and does not meet the explosion-proof requirements of special industries with explosive environments. This is because the existing elevator door machine's car door lock structure may generate sparks or thermal effects under normal operation and specified fault conditions, which may easily ignite explosive gases. Summary of the invention:

[0003] The purpose of the present invention is to solve the existing problems and provide an explosion-proof elevator car door lock assembly.

[0004] The technical solutions of the present invention are as follows:

[0005] An explosion-proof elevator car door lock assembly comprises a car, a door machine bottom plate, a hanging plate, a door knife, a car door and a PLC control system, wherein the door machine bottom plate is fixed on the car, the hanging plate is driven by a motor, the car door is mounted on the hanging plate, the hanging plate drives the car door to open and close, the door knife is mounted on the front side of the hanging plate, the door knife is used to lock and unlock the hanging plate to open and close, the hanging plate is relatively arranged on the front side of the door machine bottom plate, the door knife has a lock hook linked thereto, a lock plate extending toward the front side of the hanging plate is fixed on the door machine bottom plate, a hook groove matching the lock hook is provided on the top surface of the lock plate, a first electrical limit switch assembly is fixed to the lower part of the lock plate, which is used for the PLC control system to verify whether the lock hook is locked, a first switch seat is fixed between the hanging plates, a second electrical limit switch assembly and a third electrical limit switch assembly are relatively arranged on the first switch seat, which are used for the PLC control system to verify whether the car door is closed.

[0006] Preferably, the first electrical limit switch assembly includes a first limit switch, a first clamping plate, a first striking rod and a second switch seat, the second switch seat is fixed to the bottom of the locking plate, the first limit switch is vertically fixed to the second switch seat, the first striking rod is vertically fixed to the first clamping plate, the first clamping plate is fixed to the rear side wall of the lock hook by an angle iron, and a channel for connecting the first striking rod and the first limit switch buckle is opened on the locking plate.

[0007] Preferably, the second electrical limit switch assembly includes a second limit switch, a second clamping plate, a second impact rod and a first bracket, the second limit switch is horizontally fixed to the outer side surface of the first switch seat, the first bracket is fixed to the hanging plate on one side of the first switch seat, the second clamping plate is fixed to the first bracket, one end of the second impact rod is fixed to the second clamping plate, and the other end can be connected to the second limit switch buckle.

[0008] Preferably, the third electrical limit switch assembly includes a third limit switch, a third clamping plate, a third impact rod and a second bracket, the third limit switch is horizontally fixed to the outer side surface of the first switch seat, the second bracket is fixed to the hanging plate on the other side of the first switch seat, the third clamping plate is fixed to the second bracket, one end of the third impact rod is fixed to the third clamping plate, and the other end can be connected to the third limit switch buckle.

[0009] The beneficial effects of the present invention are as follows: by performing two verifications by a combination of a first electrical limit switch assembly in cooperation with a mechanical lock hook, a second electrical limit switch assembly and a third electrical limit switch assembly, the opening or closing of the car door is determined, thereby improving the safety of the car, and the insertion or separation of the limit switch and the striker rod will not generate sparks or thermal effects, thereby solving the problem of sparks generated by the exposed contact of the traditional switch copper sheet, making the elevator door machine explosion-proof and meeting the national requirements for explosion-proof elevators. Description of the drawings:

[0010] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0011] Figure 2 This is a three-dimensional schematic diagram of the present invention after the car door is removed;

[0012] Figure 3 This is a schematic diagram of the main view of the present invention after the car door is removed;

[0013] Figure 4 This is a three-dimensional schematic diagram of the present invention after the car door is removed;

[0014] In the attached drawings: 1. door machine bottom plate; 2. hanging plate; 3. lock hook; 4. lock plate; 5. hook groove; 6. first electrical limit switch assembly; 7. first switch seat; 8. second electrical limit switch assembly; 9. third electrical limit switch assembly; 10. first limit switch; 11. first clamping plate; 12. first impact rod; 13. second switch seat; 14. angle iron; 15. second limit switch; 16. second clamping plate; 17. second impact rod; 18. first bracket; 19. third limit switch; 20. third clamping plate; 21. third impact rod; 22. second bracket; 23. car door. Specific implementation method:

[0015] like Figure 1-4As shown, the explosion-proof elevator car door lock assembly includes a car, a door machine bottom plate 1, a hanging plate 2, a door knife, a car door 23 and a PLC control system. The door machine bottom plate 1 is fixed to the car, the hanging plate 2 is driven by a motor, the car door 23 is installed on the hanging plate 2, the hanging plate 2 drives the car door 23 to open and close, the door knife is installed on the front side of the hanging plate 2, the door knife is used to lock and unlock the hanging plate 2 to open and close, the hanging plate 2 is relatively arranged on the front side of the door machine bottom plate 1, and the door knife has a lock hook 3 linked thereto. A lock plate 4 extending toward the front side of the hanging plate 2 is fixed on the door machine bottom plate 1, a hook groove 5 cooperating with the lock hook 3 is formed on the top surface of the lock plate 4, a first electrical limit switch assembly 6 is fixed to the lower part of the lock plate 4, which is used for the PLC control system to verify whether the lock hook 3 is locked, a first switch seat 7 is fixed between the hanging plates 2, and a second electrical limit switch assembly 8 and a third electrical limit switch assembly 9 are relatively arranged on the first switch seat 7, which are used for the PLC control system to verify whether the car door 23 is closed.

[0016] Specifically, the first electrical limit switch assembly 6 includes a first limit switch 10, a first clamping plate 11, a first striking rod 12 and a second switch seat 13, the second switch seat 13 is fixed to the bottom of the locking plate 4, the first limit switch 10 is vertically fixed to the second switch seat 13, the first striking rod 12 is vertically fixed to the first clamping plate 11, the first clamping plate 11 is fixed to the rear side wall of the lock hook 3 through an angle iron 14, and a channel for connecting the first striking rod 12 and the first limit switch 10 is opened on the locking plate 4. The first limit switch 10 and the first striking rod 12 will generate different electrical signals when they are locked or separated and transmitted to the PLC control system.

[0017] Specifically, the second electrical limit switch assembly 8 includes a second limit switch 15, a second clamping plate 16, a second impact rod 17 and a first bracket 18. The second limit switch 15 is horizontally fixed to the outer side surface of the first switch seat 7, the first bracket 18 is fixed to the hanging plate 2 on one side of the first switch seat 7, the second clamping plate 16 is fixed to the first bracket 18, one end of the second impact rod 17 is fixed to the second clamping plate 16, and the other end can be connected with the second limit switch 15 by buckle. The buckle or separation of the second limit switch 15 and the second impact rod 17 will generate different electrical signals transmitted to the PLC control system.

[0018] Specifically, the third electrical limit switch assembly 9 includes a third limit switch 19, a third clamping plate 20, a third impact rod 21 and a second bracket 22. The third limit switch 19 is horizontally fixed to the outer side surface of the first switch seat 7, and the second bracket 22 is fixed to the hanging plate 2 on the other side of the first switch seat 7. The third clamping plate 20 is fixed to the second bracket 22. One end of the third impact rod 21 is fixed to the third clamping plate 20, and the other end can be connected to the third limit switch 19 by buckling. The buckling or separation of the third limit switch 19 and the third impact rod 21 will generate different electrical signals transmitted to the PLC control system.

[0019] Working principle: the motor drives the hanging plate 2 to open and close through the wire rope and the synchronous belt, and then drives the car door 23 to open and close. When the car door 23 is opened, the lock hook 3 rotates and unlocks from the hook groove 5 under the linkage action of the door knife. At the same time, the first limit switch 10, the second limit switch 15 and the third limit switch 19 are separated from the striker, and the generated electrical signal is transmitted to the PLC control system, so that the car door 23 is opened to the maximum opening and stops; when the car door 23 is closed, the second limit switch 15 and the third limit switch 19 are buckled with the striker at the same time, and the lock hook 3 is buckled with the hook groove 5 under the linkage of the door knife. When the locking action is completed, the first striker 12 is buckled with the first limit switch 10. The electrical signal generated after the second limit switch 15 and the third limit switch 19 are buckled, and the electrical signal generated after the first limit switch 10 and the first striker 12 are buckled are successively transmitted to the PLC control system, and the lifting and lowering of the car is determined according to the number of the floor button.

[0020] The above description is only used to understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the rights of the present invention.

Claims

1. An explosion-proof elevator car door lock assembly, comprising a car, a door machine bottom plate, a hanging plate, a door knife, a car door and a PLC control system, wherein the door machine bottom plate is fixed to the car, the hanging plate is driven by a motor, the car door is mounted on the hanging plate, the hanging plate drives the car door to open and close, the door knife is mounted on the front side of the hanging plate, and the door knife is used to lock and unlock the hanging plate to open and close, characterized in that: The hanging plate is relatively arranged on the front side of the door machine bottom plate, and the door knife has a lock hook linked thereto. A lock strike plate extending to the front side of the hanging plate is fixed on the door machine bottom plate, and a hook groove cooperating with the lock hook is opened on the top surface of the lock strike plate. A first electrical limit switch assembly is fixed to the lower part of the lock strike plate, which is used for the PLC control system to verify whether the lock hook is locked. A first switch seat is fixed between the hanging plates, and a second electrical limit switch assembly and a third electrical limit switch assembly are relatively arranged on the first switch seat, which is used for the PLC control system to verify whether the car door is closed. The first electrical limit switch assembly includes a first limit switch, a first clamping plate, a first striker and a second switch seat. The second switch seat is fixed to the bottom of the lock strike plate, the first limit switch is vertically fixed to the second switch seat, the first striker is vertically fixed to the first clamping plate, and the first clamping plate is connected to the rear of the lock hook through an angle iron. The side wall is fixed, and a channel for connecting the first striker and the first limit switch buckle is opened on the lock plate. The second electrical limit switch assembly includes a second limit switch, a second clamping plate, a second striker and a first bracket. The second limit switch is horizontally fixed to the outer side surface of the first switch seat, and the first bracket is fixed to the hanging plate on one side of the first switch seat. The second clamping plate is fixed to the first bracket. One end of the second striker is fixed to the second clamping plate, and the other end can be connected to the second limit switch buckle. The third electrical limit switch assembly includes a third limit switch, a third clamping plate, a third striker and a second bracket. The third limit switch is horizontally fixed to the outer side surface of the first switch seat, and the second bracket is fixed to the hanging plate on the other side of the first switch seat. The third clamping plate is fixed to the second bracket. One end of the third striker is fixed to the third clamping plate, and the other end can be connected to the third limit switch buckle.

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