Elevator safety door lock detection device

Abstract

The present application relates to an elevator safety door lock detection device, including: a power input interface, an elevator door lock contact, a door lock contact input interface, a safety detection switch, a safety relay, a safety door lock output interface and a power ground; wherein the power input interface is connected to one end of the elevator door lock contact, the other end of the elevator door lock contact is connected to the door lock contact input interface, the door lock contact input interface is connected to the input end of the safety detection switch, the output end of the safety detection switch is connected to the input end of the safety relay, the output end of the safety relay is connected to the power ground, and the output end of the safety relay is also connected to the safety door lock output interface. By judging the abnormal situation of the elevator door lock contact through the safety detection switch, the structure of the elevator safety door lock detection device is simplified, and the cost of the elevator safety door lock detection device is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of elevators, and in particular to an elevator safety door lock detection device. Background Art

[0002] With the development of the market economy and the continuous expansion of urban scale, elevators, as a necessary means of transport for entering and exiting high-rise buildings, have gradually become an indispensable part of high-rise buildings such as residences, hotels, shopping malls, and office buildings. While elevators bring convenience to passengers, there are also some safety hazards; for example, when elevator maintenance and supervision are not in place, elevator door lock failures often cause people to be trapped in elevators during use, and these accidents bring unnecessary panic to passengers.

[0003] Data shows that among all the elevator failures in operation, the most common is door lock failure, accounting for 72% of the total number of failures. The main reason is poor contact caused by oxidation / melting of the door lock contacts, and the elevator cannot quickly identify and warn of abnormal conditions of the door lock. In response to this problem, some elevators use microprocessor units or controller units to monitor the abnormal state of the door lock to solve the problem of door lock failure monitoring, but this method has the defects of high cost and complex device structure. In addition, the existing technology also has the problem of being unable to identify the specific floor location where the door lock failure is located. The specific fault location can only be determined by rescue or maintenance personnel checking each floor, which brings a lot of workload to the rescue or maintenance personnel and greatly affects the efficiency of rescue or maintenance.

[0004] With regard to the problems of complex structure and high cost of elevator safety door lock detection devices in the related art, no effective solution has been proposed so far. Utility Model Content

[0005] In this embodiment, an elevator safety door lock detection device is provided to solve the problem of complex structure and high cost of elevator safety door lock detection devices in related technologies.

[0006] In the first aspect, an elevator safety door lock detection device is provided in this embodiment, including: a power input interface, an elevator door lock contact, a door lock contact input interface, a safety detection switch, a safety relay, a safety door lock output interface and a power ground; wherein the power input interface is connected to one end of the elevator door lock contact, the other end of the elevator door lock contact is connected to the door lock contact input interface, the door lock contact input interface is connected to the input end of the safety detection switch, the output end of the safety detection switch is connected to the input end of the safety relay, the output end of the safety relay is connected to the power ground, and the output end of the safety relay is also connected to the safety door lock output interface.

[0007] In some of the embodiments, the safety detection switch includes an auxiliary relay, which is connected to the door lock contact input interface. The auxiliary relay includes a coil and a normally open contact. The coil and the normally open contact both correspond to the elevator door lock contacts one by one. The normally open contact closes when the corresponding coil is energized, and opens when the corresponding coil is de-energized.

[0008] In some of the embodiments, the elevator door lock contacts include door lock contacts and door in-position contacts, and the safety detection switch includes a coil and a normally open contact; the coil includes a first coil and a second coil, the first coil corresponds to the door lock contact, and the second coil corresponds to the door in-position contact; the normally open contact includes a first normally open contact and a second normally open contact, the first normally open contact closes based on the power-on of the corresponding first coil, and the first normally open contact opens based on the power-off of the corresponding first coil; the second normally open contact closes based on the power-on of the corresponding second coil, and the second normally open contact opens based on the power-off of the corresponding second coil; the first normally open contact and the second normally open contact are connected in series and connected to the input end of the safety relay.

[0009] In some of the embodiments, the elevator door lock contacts include 2 door lock contacts and 2 door in place contacts, and the 2 door lock contacts and the 2 door in place contacts are connected to the door lock contact input interface in sequence; the safety detection switch includes 2 first auxiliary relays and 2 second auxiliary relays, the first auxiliary relays correspond to the door lock contacts, and the second auxiliary relays correspond to the door in place contacts.

[0010] In some of the embodiments, the first auxiliary relay includes a first coil and a first normally open contact, the second auxiliary relay includes a second coil and a second normally open contact, one end of each of the first coil and the second coil is respectively connected to the door lock contact input interface, and the other end of each of the first coil and the second coil is respectively connected to the power ground; the two door locking contacts correspond to the two first coils respectively, and the two door in place contacts correspond to the two second coils respectively; the two first normally open contacts are connected in parallel to form a first safety circuit detection subunit, the two second normally open contacts are connected in parallel to form a second safety circuit detection subunit, and the first safety circuit detection subunit and the second safety circuit detection subunit are connected in series to form a safety circuit detection unit; the input end of the safety circuit detection unit is connected to the power input interface, and the output end of the safety circuit detection unit is connected to the input end of the safety relay.

[0011] In some of the embodiments, the device also includes an early warning detection unit, which includes a normally closed contact, an early warning relay, a power ground and an early warning output interface; the input end of the normally closed contact is connected to the output end of the safety detection switch, the output end of the normally closed contact is connected to the input end of the early warning relay, the output end of the early warning relay is connected to the power ground, and the output end of the early warning relay is also connected to the early warning output interface, and the conduction of the normally closed contact is linked to the disconnection of the normally open contact of the safety detection switch, and the disconnection of the normally closed contact is linked to the conduction of the normally open contact of the safety detection switch.

[0012] In some of the embodiments, the early warning detection unit includes multiple normally closed contacts, which are arranged in a one-to-one correspondence with the elevator door lock contacts. The multiple normally closed contacts are connected in parallel to form a control unit of the early warning detection unit. The input end of the control unit is connected to the output end of the safety detection switch, and the output end of the control unit is connected to the input end of the early warning relay.

[0013] In some of the embodiments, the safety relay and the early warning relay are connected in parallel, and the input end of the early warning relay is connected to the output end of the control unit of the early warning detection unit.

[0014] In some of the embodiments, the other end of the warning output interface is connected to one end of the address communication board, and the other end of the address communication board sends the warning information output by the warning output interface to the elevator main control board through the communication bus.

[0015] In some of the embodiments, the device also includes: a door lock circuit, an address communication board, a communication bus and an elevator main control board; wherein the safety door lock output interface is connected to the door lock circuit, the early warning output interface is connected to the input end of the address communication board, the output end of the address communication board is connected to the communication bus, and the early warning information is sent to the elevator main control board via the communication bus.

[0016] Compared with the related art, in this embodiment, an elevator safety door lock detection device is provided, including: a power input interface, an elevator door lock contact, a door lock contact input interface, a safety detection switch, a safety relay, a safety door lock output interface and a power ground; wherein the power input interface is connected to one end of the elevator door lock contact, the other end of the elevator door lock contact is connected to the door lock contact input interface, the door lock contact input interface is connected to the input end of the safety detection switch, the output end of the safety detection switch is connected to the input end of the safety relay, the output end of the safety relay is connected to the power ground, and the output end of the safety relay is also connected to the safety door lock output interface. By judging the abnormal situation of the elevator door lock contact through the safety detection switch, the structure of the elevator safety door lock detection device is simplified, and the cost of the elevator safety door lock detection device is reduced.

[0017] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 Schematic diagram of the structure of the elevator safety door lock detection device of this embodiment.

[0020] Figure 2 Schematic diagram of the structure of the elevator safety door lock detection device of this embodiment.

[0021] Figure 3 It is a schematic diagram of the preferred structure of the elevator safety door lock detection device of this embodiment.

[0022] Figure 4 It is a structural schematic diagram of the elevator safety door lock detection device of this embodiment including an early warning detection unit.

[0023] Figure 5 It is a schematic diagram of a preferred structure of the elevator safety door lock detection device of this embodiment including an early warning detection unit.

[0024] Figure 6 It is a schematic diagram of the structure of the external circuit of the elevator safety door lock detection device of this embodiment.

[0025] Figure 7 It is a structural schematic diagram of another elevator safety door lock detection device of this embodiment. DETAILED DESCRIPTION

[0026] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0027] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0028] In this embodiment, a device for detecting elevator safety door locks is provided. Figure 1 : is a schematic diagram of the structure of the elevator safety door lock detection device of this embodiment. Figure 1 As shown, the elevator safety door lock detection device includes: a power input interface 11, an elevator door lock contact 12, a door lock contact input interface 13, a safety detection switch 14, a safety relay 15, a safety door lock output interface 16 and a power ground 17; wherein the power input interface 11 is connected to one end of the elevator door lock contact 12, the other end of the elevator door lock contact 12 is connected to the door lock contact input interface 13, the door lock contact input interface 13 is connected to the input end of the safety detection switch 14, the output end of the safety detection switch 14 is connected to the input end of the safety relay 15, the output end of the safety relay 15 is connected to the power ground 17, and the output end of the safety relay 15 is also connected to the safety door lock output interface 16.

[0029] Specifically, the elevator safety door lock detection device includes a power input interface 11, an elevator door lock contact 12, a door lock contact input interface 13, a safety detection switch 14, a safety relay 15, a safety door lock output interface 16 and a power ground 17. Among them, the power input interface 11 of the elevator safety door lock detection device is connected to one end of the elevator door lock contact 12, the other end of the elevator door lock contact 12 is connected to the door lock contact input interface 13, the door lock contact input interface 13 is connected to the input end of the safety detection switch 14, the output end of the safety detection switch 14 is connected to the input end of the safety relay 15, the output end of the safety relay 15 is connected to the power ground 17 to complete the path, the output end of the safety relay 15 is also connected to the safety door lock output interface 16, and the safety door lock output interface 16 is used to access the elevator door lock circuit. When the power supply is connected through the power input interface 11, the elevator door lock contact 12, the door lock contact input interface 13, the safety detection switch 14, the safety relay 15 and the safety door lock output interface 16 form an electrical circuit; when the power supply input interface 11 is connected to the power supply, the elevator door lock contact 12, the door lock contact input interface 13, the safety detection switch 14, the safety relay 15 and the power ground 17 form an electrical circuit.

[0030] Compared with the related art, this solution can detect the abnormality of the elevator safety circuit by using simple switch elements and relay elements, without using the microprocessor unit or controller unit in the prior art, simplifying the structure of the elevator safety door lock detection device and reducing the cost of the elevator safety door lock detection device. When the door lock contact is in normal contact, the safety detection switch 14 is turned on, and the safety door lock output interface 16 outputs an electrical signal that is connected to the elevator door lock circuit. When the door lock contact is in abnormal contact, such as poor contact of the door lock contact or a door lock contact failure, the safety detection switch 14 is disconnected, the safety door lock output interface 16 stops outputting electrical signals, disconnects the connection between the safety door lock output interface 16 and the elevator door lock circuit, and the elevator stops running, thereby playing the role of door lock safety detection.

[0031] In one embodiment, the safety detection switch includes an auxiliary relay, which is connected to the door lock contact input interface. The auxiliary relay includes a coil and a normally open contact. The coil and the normally open contact correspond to the elevator door lock contacts one by one. The normally open contact closes when the corresponding coil is energized, and opens when the corresponding coil is de-energized.

[0032] Specifically, the safety detection switch includes an auxiliary relay, and the auxiliary relays are all safety relays. Each auxiliary relay includes a coil and a normally open contact. The coil of each auxiliary relay is connected to the elevator door lock contact input interface, and each coil corresponds to a door lock contact. In addition, the coil of each auxiliary relay corresponds to its normally open contact. If the door lock contact is in normal contact, the coil of the corresponding auxiliary relay is connected, the coil of the auxiliary relay is energized, and the normally open contact corresponding to it is closed; if the door lock contact is abnormal, the coil of the corresponding auxiliary relay is de-energized, and the normally open contact corresponding to it is disconnected (wherein, the disconnection action includes the case where the closed state changes to the disconnected state, or the case where the disconnected state remains in the disconnected state).

[0033] The above-mentioned safety detection switch forms a one-to-one correspondence between the auxiliary relay and the door lock contact, that is, the coil of the auxiliary relay is correspondingly connected to the door lock contact, and the normal or abnormal contact state of the door lock contact can be reflected by the energized state or de-energized state of the coil; the energization or de-energization of the coil is reflected in real time on the on-off action of the normally open contact, thereby controlling the conduction and disconnection between the elevator safety door lock detection device and the elevator door lock circuit through the auxiliary relay, simplifying the structure of the elevator safety door lock detection device and reducing the cost of the device.

[0034] In another embodiment, Figure 2 : is a schematic diagram of the structure of the elevator safety door lock detection device of this embodiment. Figure 2 As shown, Figure 2 exist Figure 1 On the basis, the elevator door lock contact 12 includes a door locking contact 122 and a door in-place contact 124, and the safety detection switch 14 includes a coil and a normally open contact; the coil includes a first coil 142 and a second coil 143, the first coil 142 corresponds to the door locking contact 122, and the second coil 143 corresponds to the door in-place contact 124; the normally open contact includes a first normally open contact 144 and a second normally open contact 145, the first normally open contact 144 is closed based on the power-on of the corresponding first coil 142; the first normally open contact 144 is disconnected based on the power-off of the corresponding first coil 142; the second normally open contact 145 is closed based on the power-on of the corresponding second coil 143, and the second normally open contact 145 is disconnected based on the power-off of the corresponding second coil 143; the first normally open contact 144 and the second normally open contact 145 are connected in series and connected to the input end of the safety relay 15.

[0035] Specifically, the elevator door lock contacts in the elevator safety door lock detection device include two types: door lock contact 122 and door in place contact 124. The door lock contact 122 is used to input whether the door lock of the elevator door is in tight contact, and the door in place contact 124 is used to input whether the door lock of the elevator door is in place at the floor where it is located. The safety detection switch in the elevator safety door lock detection device includes a first auxiliary relay and a second auxiliary relay. The first auxiliary relay includes a first coil 142 and a first normally open contact 144. The second auxiliary relay includes a second coil 143 and a second normally open contact 145. Among them, one end of the door lock contact 122 is connected to the door lock contact input interface 13 and then connected to the first auxiliary relay. At this time, the door lock contact 122 corresponds to the first coil 142, and the first coil 142 corresponds to the first normally open contact 144. When the door lock contact 122 contacts normally, the first coil 142 is energized and the corresponding first normally open contact 144 is closed; when the door lock contact 122 contacts abnormally, the first coil 142 is de-energized and the corresponding first normally open contact 144 is disconnected. One end of the door in-place contact 124 is connected to the door lock contact input interface 13 and then connected to the second auxiliary relay; at this time, the door in-place contact 124 corresponds to the second coil 143, and the second coil 143 corresponds to the second normally open contact 145. When the door in-place contact 124 contacts normally, the second coil 143 is energized and the corresponding second normally open contact 145 is closed; when the door in-place contact 124 contacts abnormally, the second coil 143 is de-energized and the corresponding second normally open contact 145 is disconnected.

[0036] Among them, the first coil 142 and the second coil 143 are connected in series and then connected to the power ground 17, the input end of the first normally open contact 144 is connected to the power input interface 11, the first normally open contact 144 and the second normally open contact 145 are connected in series, and the output end of the second normally open contact 145 is connected to the input end of the safety relay 15. The other end of the coil is connected to the power ground 17, so that the circuit where the coil is located forms a complete electrical loop. Through the corresponding connection of the elevator door lock contact and the coil of the auxiliary relay and the normally open contact of the auxiliary relay, it is detected whether the elevator door lock contact is in normal contact. Only when the door lock contact 122 and the door in place contact 124 are in normal contact, the safety relay will output a signal to the safety door lock output interface 16, and the door lock circuit will be connected.

[0037] In one embodiment, the elevator door lock contacts include two door lock contacts 122 and two door in place contacts 124, and the two door lock contacts 122 and the two door in place contacts 124 are connected to the door lock contact input interface 13 in sequence; the safety detection switch 14 includes two first auxiliary relays and two second auxiliary relays, the first auxiliary relays are correspondingly connected to the door lock contacts 122, and the second auxiliary relays are correspondingly connected to the door in place contacts 124.

[0038] Specifically, the elevator door lock contact includes two door lock contacts 122 and two door in place contacts 124, and the two door lock contacts 122 and the two door in place contacts 124 are connected to the door lock contact input interface 13 in sequence. The safety detection switch is composed of two first auxiliary relays and two second auxiliary relays, wherein the two first auxiliary relays correspond to the two door lock contacts, and the two second auxiliary relays correspond to the two door in place contacts, thereby forming a dual-channel redundant structure. As long as one of the two door lock contacts 122 and the two door in place contacts 124 is in normal contact, the elevator door lock circuit can be turned on to maintain the normal operation of the elevator; avoiding the situation where only one of the contacts has an abnormal contact and causes the elevator to fail to operate. The above-mentioned upper channel redundant structure can avoid the situation where there is only one door lock contact 122 and one door in place contact 124, and one of the contacts has an abnormal contact, which directly causes the elevator to fail.

[0039] In another embodiment, Figure 3 : is a schematic diagram of a preferred structure of the elevator safety door lock detection device of this embodiment, such as Figure 3 As shown, Figure 3 exist Figure 2 On the basis, the first auxiliary relay includes a first coil 142 and a first normally open contact 144, the second auxiliary relay includes a second coil 143 and a normally open contact 145, one end of each of the first coil 142 and the second coil 143 is respectively connected to the door lock contact input interface 13, and the other end of each of the first coil 142 and the second coil 143 is respectively connected to the power ground 17; the two door locking contacts 122 correspond to the two first coils 142 respectively, and the two door in place contacts 124 correspond to the two second coils 143 respectively; the two first normally open contacts 144 are connected in parallel to form a first safety circuit detection subunit 146, the two second normally open contacts 145 are connected in parallel to form a second safety circuit detection subunit 147, and the first safety circuit detection subunit 146 and the second safety circuit detection subunit 147 are connected in series to form a safety circuit detection unit 148; the input end of the safety circuit detection unit 148 is connected to the power input interface 11, and the output end of the safety circuit detection unit 148 is connected to the input end of the safety relay 15.

[0040] Specifically, the safety detection switch 14 includes two first auxiliary relays and two second auxiliary relays, each of which includes a first coil 142 and a first normally open contact 144; each second auxiliary relay includes a second coil 143 and a second normally open contact 145; after a door lock contact 122 is connected to a door lock contact input interface 13, it is connected to the input end of a first coil 142, and the output end of the first coil 142 is connected to the power ground 17. After a door in place contact 124 is connected to a door lock contact input interface 13, it is connected to the input end of a second coil 143, and the output end of a second coil 143 is connected to the power ground 17. A first coil 142 corresponds to a first normally open contact 144, and a second coil 143 corresponds to a second normally open contact 145; two first normally open contacts 144 are connected in parallel to form a first safety circuit detection subunit 146, and the first safety circuit detection subunit Element 146 is used to detect whether the door locking contact 122 is in normal contact (if at least one of the two door locking contacts 122 is in normal contact, the first safety circuit detection subunit can be turned on); the two second normally open contacts 145 are connected in parallel to form a second safety circuit detection subunit 147, and the second safety circuit detection subunit 147 is used to detect whether the door in-place contact 124 is in normal contact (if at least one of the two door in-place contacts 124 is in normal contact, the second safety circuit detection subunit can be turned on), the first safety circuit detection subunit 146 and the second safety circuit detection subunit 147 are connected in series to form a safety circuit detection unit 148, and the safety circuit detection unit 148 is used to detect whether the door locking contact 122 and the door in-place contact 124 are both in normal contact (if at least one door locking contact 122 and at least one door in-place contact 124 are both in normal contact, the safety circuit detection unit 148 can be turned on). The input end of the first safety circuit detection subunit 146 is connected to the power input interface 11, the output end of the first safety circuit detection subunit 146 is connected in series to the input end of the second safety circuit detection subunit 147, and the output end of the second safety circuit detection subunit 147 is connected to the input end of the safety relay 15. The power input interface 11 is connected to the power supply, and the safety circuit detection unit 148, the safety relay 15 and the power supply ground form an electrical circuit. The safety circuit detection unit 148 composed of the first safety circuit detection subunit 146 and the second safety circuit detection subunit 147 connected in series realizes a dual-channel redundant detection function, and safely monitors whether the contact condition of the door lock contacts is normal or not, which can effectively reduce the occurrence of elevator failures and inability to operate immediately due to abnormal contact of one of the door lock contacts.

[0041] In one embodiment, Figure 4 : is a schematic diagram of the structure of the elevator safety door lock detection device of this embodiment including an early warning detection unit, such as Figure 4 As shown, Figure 4 exist Figure 3 On the basis of the above, the device also includes an early warning detection unit, which includes a normally closed contact 18, an early warning relay 19, a power ground 17 and an early warning output interface 20; the input end of the normally closed contact 18 is connected to the output end of the safety detection switch 14, the output end of the normally closed contact 18 is connected to the input end of the early warning relay 19, the output end of the early warning relay 19 is connected to the power ground 17, and the output end of the early warning relay 19 is also connected to the early warning output interface 20, and the conduction of the normally closed contact 18 is based on the disconnection of the normally open contact of the safety detection switch 14, and the disconnection of the normally closed contact 18 is based on the conduction of the normally open contact of the safety detection switch 14.

[0042] Specifically, the elevator safety door lock detection device also includes an early warning detection unit, wherein the early warning relay adopts a safety relay; the input end of the normally closed contact 18 is connected to the output end of the safety circuit detection unit 148 of the safety detection switch 14, the output end of the normally closed contact 18 is connected to the input end of the early warning relay 19, the output end of the early warning relay 19 is connected to the power ground 17 to form an early warning electrical circuit, and the output end of the early warning relay 19 is connected to the early warning output interface 20 to form an early warning output electrical circuit. The normally closed contact 18 is the normally closed contact of the auxiliary relay, and the normally closed contact 18 of the auxiliary relay is set in linkage with the normally open contact of the auxiliary relay. When the normally open contact of the auxiliary relay is disconnected, the normally closed contact corresponding to the auxiliary relay is closed, the early warning output electrical circuit is connected, and the early warning information is output; when the normally open contact of the auxiliary relay is closed, the normally closed contact corresponding to the auxiliary relay is disconnected, the early warning circuit is disconnected, and no early warning information is output. By forming an early warning detection unit through normally closed contacts, early warning signals can be output in time for abnormal door lock contacts, which improves the early warning efficiency and realizes rapid identification of abnormal contact of door lock contacts, so that maintenance personnel can reasonably arrange maintenance time in advance and reduce elevator shutdowns caused by door lock failures, especially reducing elevator shutdowns caused by abnormal door lock contacts during peak traffic hours.

[0043] In another embodiment, Figure 5 : is a schematic diagram of a preferred structure of the elevator safety door lock detection device of this embodiment including an early warning detection unit, such as Figure 5 As shown, Figure 5 exist Figure 4 On the basis, the early warning detection unit includes multiple normally closed contacts, which are arranged in one-to-one correspondence with the elevator door lock contacts, and multiple door lock contacts match multiple normally closed contacts. Multiple normally closed contacts are connected in parallel to form a control unit of the early warning detection unit, which can quickly identify and warn any faulty door lock contact. The input end of the control unit is connected to the output end of the safety detection switch, and the output end of the control unit is connected to the input end of the early warning relay.

[0044] Specifically, the early warning detection unit includes a plurality of normally closed contacts, and the plurality of normally closed contacts respectively correspond to detecting whether the contact of the plurality of door lock contacts is normal or not. The actual number of normally closed contacts can be determined according to the actual situation, and this embodiment does not make a specific limitation. This embodiment takes four door lock contacts as an example, and four normally closed contacts 18 are connected in parallel to form a control unit 21 of the early warning detection unit. Each normally closed contact 18 corresponds to a door lock contact. When the door lock contact is disconnected, the coil of the corresponding auxiliary relay is powered off, the corresponding normally open contact is disconnected, the corresponding normally closed contact is closed, the early warning detection circuit is turned on, and an early warning signal is output through the early warning output interface. By forming an early warning detection control unit with normally closed contacts, abnormal conditions of the door lock can be quickly identified and an early warning signal can be issued. On the basis of simplifying the early warning detection device, the cost of the early warning detection device is reduced.

[0045] In some of the embodiments, the safety relay 15 and the warning relay 19 are connected in parallel, and the input end of the warning relay 19 is connected to the output end of the control unit 21 of the warning detection unit.

[0046] Specifically, Figure 5 As shown, the safety relay 15 and the early warning relay 19 are connected in parallel, the output end of the early warning relay 19 is connected to the input end of the control unit 21 of the early warning detection unit, the safety relay 15 is connected to the safety detection circuit, the safety relay 15 turns on the door lock output interface 16, the early warning relay 19 is connected to the early warning detection circuit, the early warning relay 19 turns on the door lock early warning output interface 20, the output of the door lock safety detection signal and the output of the early warning signal are independent of each other, and are safer and more reliable.

[0047] In another embodiment, Figure 6 : is a schematic diagram of the structure of the external circuit of the elevator safety door lock detection device of this embodiment. Figure 6 As shown, Figure 6 exist Figure 5 On the basis, the other end of the warning output interface 20 is connected to one end of the address communication board 22, and the other end of the address communication board 22 sends the warning information output by the warning output interface to the elevator main control board 24 through the communication bus 23.

[0048] Specifically, the early warning detection unit of the elevator safety door lock detection device is also externally connected to the address communication board 22, and the other end of the early warning output interface 20 is connected to one end of the address communication board 22. The address communication board 22 can help the staff to lock the specific floor position where the door lock contact is abnormal, which is convenient for maintenance personnel to quickly locate and perform maintenance. The other end of the address communication board 22 is connected to the communication bus 23. When the door lock contact is abnormal, the early warning information is sent to the elevator main control board 24 through the communication bus 23. The elevator main control board 24 facilitates the staff to see the door lock abnormal information in time, which is convenient for the maintenance task. In this embodiment, the above-mentioned auxiliary relay, safety relay, and early warning relay are all safety relays.

[0049] In some of these embodiments, Figure 7 is a structural schematic diagram of another elevator safety door lock detection device of this embodiment, such as Figure 7 As shown, Figure 7 exist Figure 6 On the basis of this, the device also includes: a door lock circuit 25, an address communication board 22, a communication bus 23 and an elevator main control board 24; wherein, the safety door lock output interface 16 is connected to the door lock circuit 25, the early warning output interface 20 is connected to the input end of the address communication board 22, the output end of the address communication board 22 is connected to the communication bus 23, and the early warning information is sent to the elevator main control board 24 through the communication bus 23.

[0050] Specifically, a plurality of the elevator safety door lock detection devices are connected in parallel to the door lock circuit 25, and respectively perform safety detection and rapid identification of abnormalities and alarm prompts on the door lock contacts of the corresponding hall door locks. The elevator safety door lock detection device controls the on and off of the elevator door lock circuit 25 based on whether the contact of the door lock contacts is normal or not through the safety detection switch 14.

[0051] Each hall door lock takes 4 door lock contacts as an example to illustrate the working principle of the above elevator safety door lock detection device: when the two door lock contacts 122 are disconnected, the two first coils 142 of the two first auxiliary relays are powered off, and the two first normally open contacts 144 of the two first auxiliary relays are disconnected. At this time, the safety detection circuit is disconnected, the safety door lock output interface 16 does not output current, the door lock circuit 25 circuit is interrupted, and the elevator stops running; when any one of the two door lock contacts 122 and the two door in place contacts 124 is abnormal, its corresponding The coil is powered off, the corresponding normally open contact is disconnected, and the corresponding normally closed contact is closed. At this time, the safety circuit operates normally, the safety door lock output interface 16 outputs current normally, the door lock circuit 25 is conductive, and the elevator operates normally. At this time, the normally closed contact corresponding to the control unit 21 of the early warning detection unit is closed, and the early warning output interface 20 outputs early warning information. The connection address communication board 22 detects the floor where the specific abnormal door lock contact is located, and sends the specific abnormal early warning information to the elevator main control board 24 through the communication bus 23. The staff receives the abnormal early warning and carries out maintenance work. This solution realizes the detection of abnormal door lock contacts without the assistance of other detection devices through the combination of the safety detection switch and the early warning detection unit, simplifies the elevator safety door lock detection device, and reduces the detection cost; in addition, without affecting the normal operation of the elevator, the fault tolerance of the door lock is improved. The device facilitates the staff to promptly discover the abnormal information of the door lock and carry out maintenance work in time, improves the fault tolerance of the elevator door lock, and improves the efficiency of the elevator operation.

[0052] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation modes, and will not be repeated in this embodiment.

[0053] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0054] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

[0055] The term "embodiment" in this application refers to a specific feature, structure or characteristic described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is clearly or implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0056] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. An elevator safety door lock detection device, characterized in that: include: Power input interface, elevator door lock contact, door lock contact input interface, safety detection switch, safety relay, safety door lock output interface and power ground; Among them, the power input interface is connected to one end of the elevator door lock contact, the other end of the elevator door lock contact is connected to the door lock contact input interface, the door lock contact input interface is connected to the input end of the safety detection switch, the output end of the safety detection switch is connected to the input end of the safety relay, the output end of the safety relay is connected to the power ground, and the output end of the safety relay is also connected to the safety door lock output interface.

2. The elevator safety door lock detection device according to claim 1, characterized in that: The safety detection switch includes an auxiliary relay, which is connected to the elevator door lock contact input interface. The auxiliary relay includes a coil and a normally open contact. The coil and the normally open contact both correspond to the elevator door lock contacts one by one. The normally open contact closes when the corresponding coil is energized, and opens when the corresponding coil is de-energized.

3. The elevator safety door lock detection device according to claim 1, characterized in that: The elevator door lock contacts include a door locking contact and a door in place contact, and the safety detection switch includes a coil and a normally open contact; The coil includes a first coil and a second coil, the first coil corresponds to the door locking contact, and the second coil corresponds to the door in place contact; The normally open contacts include a first normally open contact and a second normally open contact, wherein the first normally open contact closes based on the corresponding first coil being energized, and opens based on the corresponding first coil being de-energized; the second normally open contact closes based on the corresponding second coil being energized, and opens based on the corresponding second coil being de-energized; the first normally open contact and the second normally open contact are connected in series to the input end of the safety relay.

4. The elevator safety door lock detection device according to claim 1, characterized in that: The elevator door lock contacts include two door lock contacts and two door in-place contacts, and the two door lock contacts and the two door in-place contacts are sequentially connected to the door lock contact input interface; The safety detection switch includes two first auxiliary relays and two second auxiliary relays, the first auxiliary relays correspond to the door locking contacts, and the second auxiliary relays correspond to the door in place contacts.

5. The elevator safety door lock detection device according to claim 4, characterized in that: The first auxiliary relay includes a first coil and a first normally open contact, and the second auxiliary relay includes a second coil and a second normally open contact; One end of each of the first coil and the second coil is connected to the door lock contact input interface, and the other end of each of the first coil and the second coil is connected to the power ground; The two door locking contacts correspond to the two first coils respectively, and the two door in position contacts correspond to the two second coils respectively; The two first normally open contacts are connected in parallel to form a first safety circuit detection subunit, the two second normally open contacts are connected in parallel to form a second safety circuit detection subunit, and the first safety circuit detection subunit and the second safety circuit detection subunit are connected in series to form a safety circuit detection unit; the input end of the safety circuit detection unit is connected to the power input interface, and the output end of the safety circuit detection unit is connected to the input end of the safety relay.

6. The elevator safety door lock detection device according to claim 2, characterized in that: The device also includes an early warning detection unit, which includes a normally closed contact, an early warning relay, a power supply ground and an early warning output interface; The input end of the normally closed contact is connected to the output end of the safety detection switch, the output end of the normally closed contact is connected to the input end of the early warning relay, the output end of the early warning relay is connected to the power ground, and the output end of the early warning relay is also connected to the early warning output interface. The conduction of the normally closed contact causes a linkage action based on the disconnection of the normally open contact of the safety detection switch, and the disconnection of the normally closed contact causes a linkage action based on the conduction of the normally open contact of the safety detection switch.

7. The elevator safety door lock detection device according to claim 6, characterized in that: The early warning detection unit includes a plurality of normally closed contacts, which are arranged in one-to-one correspondence with the elevator door lock contacts. The plurality of normally closed contacts are connected in parallel to form a control unit of the early warning detection unit. The input end of the control unit is connected to the output end of the safety detection switch, and the output end of the control unit is connected to the input end of the early warning relay.

8. The elevator safety door lock detection device according to claim 7, characterized in that: The safety relay and the early warning relay are connected in parallel, and the input end of the early warning relay is connected to the output end of the control unit of the early warning detection unit.

9. The elevator safety door lock detection device according to any one of claims 6 to 8, characterized in that: The other end of the warning output interface is connected to one end of the address communication board, and the other end of the address communication board sends the warning information output by the warning output interface to the elevator main control board through a communication bus.

10. The elevator safety door lock detection device according to any one of claims 6 to 8, characterized in that: The device also includes: a door lock circuit, an address communication board, a communication bus and an elevator main control board; wherein the safety door lock output interface is connected to the door lock circuit, the early warning output interface is connected to the input end of the address communication board, the output end of the address communication board is connected to the communication bus, and the early warning information is sent to the elevator main control board through the communication bus.

Images