Locking control method, device and system of rail transit disconnecting link

Abstract

The invention relates to the technical field of rail transit disconnecting link locking control, and discloses a rail transit disconnecting link locking control method, device and system. Through the collaborative design of the on-site control change-over switch module and the remote control relay group, grounding or switching of power supply can be quickly realized without dismounting hardware wiring, so that a locking control scheme in the prior art when an isolation knife switch and a grounding knife switch cannot be controlled through hard wiring is solved; and the problems of low control efficiency and unsafety are solved, so that the maintenance efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of locking control of rail transit knife switches, and in particular to a locking control method, device, and system for rail transit knife switches. Background Art

[0002] With the development of rail safety technology, the interlocking setting between the isolation switch and the grounding switch is one of the means to ensure the life safety of workers during maintenance.

[0003] At present, the interlocking control between the isolation knife switch and the grounding knife switch is mainly achieved by connecting their respective auxiliary contacts in series to the other party's motor circuit through hard wiring, and the motor circuits of both parties control each other's auxiliary contacts. However, due to the direct connection by hard wiring, if the auxiliary contacts of the isolation knife switch or the grounding knife switch fail or other problems occur and cannot be controlled, it is necessary to manually go down to the track area, check one by one, and manually remove the hard wiring. Although this treatment method can solve the problem, its control efficiency and safety cannot be guaranteed. Summary of the Invention

[0004] The present application provides a locking control method, device and system for a rail transit knife switch to solve the problems of low control efficiency and insecurity in the locking control scheme of the prior art when the isolation knife switch and the grounding knife switch cannot be controlled by hard wiring.

[0005] In a first aspect, the present application provides a locking control method for a rail transit knife switch, which is applied to a locking control device, wherein the locking control device is installed in a track area and is communicatively connected to a knife switch mechanism box and a grounding cabinet respectively; the locking control device comprises: a transfer switch module with three gears, a measurement and control module, a relay group, and a communication module communicatively connected to the measurement and control module;

[0006] After the transfer switch module is connected to the relay group, it is connected in parallel with the auxiliary contact of the isolation switch, and the auxiliary contact of the isolation switch is connected in series with the motor of the grounding switch to form a release locking circuit;

[0007] After the transfer switch module is connected to the relay group, it is connected in parallel with the auxiliary contact of the grounding switch, and the auxiliary contact of the grounding switch is connected in series with the motor of the isolation switch to form a ground release locking circuit;

[0008] The transfer switch module is connected to the relay group, and the relay group is connected to the measurement and control module to form a mutual locking loop;

[0009] The locking control method includes:

[0010] In the local locking mode, by controlling the conversion switch module to switch the corresponding gear, the unlocking locking circuit is controlled to perform unlocking control, or the unlocking ground locking circuit is controlled to perform unlocking control, or the on-off control of the mutual locking circuit is controlled to perform interlocking control;

[0011] In the remote control locking mode, the measurement and control module controls the communication module to receive the locking control instructions sent from the outside, and controls the relay group based on the locking control instructions to perform unlocking control on the unlocking locking circuit, or to perform unlocking control on the unlocking locking circuit, or to perform interlocking control on the mutual locking.

[0012] In an optional embodiment, the transfer switch module includes a first switch group, a second switch group and a third switch group; the relay group includes a first relay and a second relay;

[0013] One switch in the first switch group is connected in series with the normally closed contact of the first relay to form a first branch, the first branch is connected in parallel with the auxiliary contact of the isolation switch and the normally open contact of the first relay respectively, the auxiliary contact of the isolation switch is connected in series with the motor of the grounding switch, and another switch in the first switch group is connected to the measurement and control module to obtain a release lockout circuit;

[0014] One switch in the second switch group is connected in series with the normally closed contact of the second relay to form a second branch, the second branch is respectively connected in parallel with the auxiliary contact of the grounding switch and the normally open contact of the second relay, the auxiliary contact of the grounding switch is connected in series with the motor of the isolation switch, and another switch of the second switch group is connected to the measurement and control module to obtain a ground release locking circuit.

[0015] In an optional embodiment, in the local locking mode, controlling the switching switch module to switch different gears to control the on / off of the unlocking locking circuit, the unlocking ground locking circuit, and the mutual locking circuit includes:

[0016] In the local locking mode, the transfer switch module is controlled to switch to the unlocking position to release the locking linkage control of the isolation switch on the grounding switch; the first switch group in the transfer switch module is controlled to be turned on to realize the independent opening and closing control of the isolation switch;

[0017] In the local locking mode, the transfer switch module is controlled to switch to the ground release position to release the locking linkage control of the grounding switch on the isolation switch; the second switch group in the transfer switch module is controlled to be turned on to realize the independent opening and closing control of the grounding switch;

[0018] In the local locking mode, the switching switch module is controlled to switch to the locking position to maintain the locking linkage control of the isolation switch and the earthing switch; the third switch group in the switching switch module is controlled to be turned on to realize the mutually exclusive opening and closing control of the isolation switch and the earthing switch.

[0019] In an optional embodiment, in the remote control locking mode, the measurement and control module controls the communication module to receive a locking control instruction sent from an external device, and controls the relay group based on the locking control instruction to control the on / off of the unlocking locking circuit, the unlocking ground locking circuit, and the mutual locking circuit, including:

[0020] In the remote control locking mode, the measurement and control module controls the communication module to obtain the knife switch status of the isolation knife switch mechanism box and the grounding cabinet, and determines whether the knife switch status meets the preset remote control conditions. Based on the judgment result, the relay group is used to control the on and off of the motor in the isolation knife switch mechanism box and the grounding cabinet to achieve locking.

[0021] In an optional embodiment, based on the judgment result, the relay group is used to control the switching of the isolation switch mechanism box and the motor in the grounding cabinet to achieve locking and retraction, including:

[0022] If the result of the judgment is that the remote control condition for disconnection is met, the measurement and control module connects the first relay in the relay group based on the generated disconnection instruction, and releases the locking linkage control of the grounding switch on the isolation switch, so as to realize the independent opening and closing control of the grounding switch;

[0023] If the result of the judgment is that the remote control condition for ground release is met, the measurement and control module turns on the second relay in the relay group based on the generated ground release instruction, and releases the locking linkage control of the grounding switch on the isolation switch, so as to realize the independent opening and closing control of the grounding switch;

[0024] If the judgment result is that the remote control conditions for locking are met, the measurement and control module keeps the first relay and the second relay in the relay group working in the default state based on the generated locking instruction to achieve mutually exclusive opening and closing control of the isolation switch and the grounding switch.

[0025] In an optional implementation manner, the locking control method further includes:

[0026] The actual states of the switch contacts in the conversion switch module and the relay group are detected by the measurement and control module, and whether the corresponding locking control is performed normally is determined based on the actual states.

[0027] In an optional implementation manner, the locking control method further includes:

[0028] According to the gear position switched by the conversion switch module and the control instruction switched by the measurement and control module, the corresponding locking operation mode is displayed, wherein the locking operation mode includes remote control unlocking mode, remote control ground unlocking mode, mutual locking mode, local unlocking mode and local ground unlocking mode.

[0029] A second aspect of the present application provides a locking control device for a rail transit knife switch, the locking control device being installed in a track area and being communicatively connected to a knife switch mechanism box and a grounding cabinet respectively; the locking control device comprising: a transfer switch module with three gears, a measurement and control module, a relay group, and a communication module;

[0030] After the transfer switch module is connected to the relay group, it is connected in parallel with the auxiliary contact of the isolation switch, and the auxiliary contact of the isolation switch is connected in series with the motor of the grounding switch to form a release locking circuit;

[0031] After the transfer switch module is connected to the relay group, it is connected in parallel with the auxiliary contact of the grounding switch, and the auxiliary contact of the grounding switch is connected in series with the motor of the isolation switch to form a ground release locking circuit;

[0032] The transfer switch module is connected to the relay group, and the relay group is connected to the measurement and control module to form a mutually locked loop; the measurement and control module is also connected to the communication module;

[0033] The measurement and control module is used for:

[0034] In the local locking mode, by controlling the transfer switch module to switch different gears, the on-off control of the unlocking locking circuit, the unlocking grounding locking circuit and the mutual locking circuit is carried out to realize the interlocking control of the isolation knife switch and the grounding knife switch;

[0035] In the remote control locking mode, the communication module is controlled to receive the locking control instructions sent from the outside, and the relay group is controlled based on the locking control instructions to control the on and off of the unlocking locking circuit, the unlocking grounding locking circuit and the mutual locking circuit to realize the interlocking control of the isolation knife switch and the grounding knife switch.

[0036] In an optional embodiment, the measurement and control module includes an open output loop and an open input loop;

[0037] The switching module and the relay group are connected in series in the open-in circuit for monitoring the actual state of the locking operation mode;

[0038] The measurement and control module and the relay group are connected in series in the output circuit, and are used to control the display module to display the corresponding locking control mode.

[0039] In an optional embodiment, the locking control device further includes:

[0040] A display module is connected to the conversion switch module and the measurement and control module respectively, and is used to display the corresponding locking operation mode according to the gear position switched by the conversion switch module and the control instruction switched by the measurement and control module, wherein the locking operation mode includes remote control unlocking mode, remote control unlocking mode, mutual locking mode, local unlocking mode and local unlocking mode.

[0041] The third aspect of the present application provides a locking system for a rail transit knife switch, the system comprising a locking control device, an isolation knife switch mechanism box and a grounding cabinet for the rail transit knife switch as provided above, the isolation knife switch mechanism box and the grounding cabinet being connected to the locking control device via cables respectively, and the locking control device controlling the three states of open, locked and local between the isolation knife switch mechanism box and the grounding cabinet through a local locking mode or a remote control locking mode.

[0042] In an optional embodiment, the locking system further includes a switch and a control host;

[0043] The control host is connected to the switch through an optical fiber / network cable, and the switch is connected to the communication module through a network. The control host is used to obtain the switch status of the isolation knife switch mechanism box and the grounding cabinet, and judge whether the switch status meets the preset remote control conditions, and control the isolation knife switch mechanism box and the grounding cabinet to three states: unlocked, locked and local based on the judgment result.

[0044] In the technical solution provided in this application, through the coordinated design of the locally controlled switching switch module and the remotely controlled relay group, it is possible to quickly achieve grounding or power supply switching without removing the hardware wiring, so as to solve the problem of low control efficiency and unsafety in the existing technology for the locking control solution when the isolation switch and the grounding switch cannot be controlled by hard wiring, and also improve the maintenance efficiency.

[0045] Furthermore, the interlocking design between the measurement and control module and the relay group is used to avoid malfunctions caused by conflicts between power supply and grounding, thereby enhancing system safety. At the same time, the display design of the locked operation mode allows real-time feedback of operation results, taking into account the dual needs of flexible control and status visualization, and solving the problems of relying on manual investigation, single operation mode and prominent safety hazards in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic diagram of an embodiment of a locking control device for a rail transit knife switch in this application;

[0047] Figure 2This is the electrical schematic diagram of the unlocking circuit in this application;

[0048] Figure 3 This is the electrical schematic diagram of the ground-locking circuit in this application;

[0049] Figure 4 This is the electrical schematic diagram of the circuit used in this application;

[0050] Figure 5 An electrical schematic diagram for the circuit in this application;

[0051] Figure 6 This is a schematic diagram of a first embodiment of a locking system for a rail transit knife switch in this application;

[0052] Figure 7 This is the electrical principle design diagram of the locking system of the rail transit knife switch in the local locking mode in this application;

[0053] Figure 8 This is a schematic diagram of a second embodiment of a locking system for a rail transit knife switch in this application;

[0054] Figure 9 This is a schematic diagram of an embodiment of the locking control method of the rail transit knife switch in this application. DETAILED DESCRIPTION

[0055] The terms "first," "second," "third," "fourth," and the like (if any) in the specification and claims of this application and in the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" or "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0056] During rail transit overhead line maintenance, it is necessary to set up a mutual interlock between the isolation switch and the grounding switch. That is, when the isolation switch is in the closed position, the grounding switch must be in the open position; when the grounding switch is in the closed position, the isolation switch must be in the open position. It is absolutely forbidden to have the isolation switch and the grounding switch in the closed position at the same time.

[0057] Based on this, the present application sets a locking control device between the isolation knife switch mechanism box and the grounding cabinet. The locking control device is connected to the isolation knife switch mechanism box and the grounding cabinet respectively through two cables, which is used to realize two types of locking control: local and remote control. This achieves the situation where the locking can be quickly and on-sitely realized without removing the hard-wired cables between the isolation knife switch mechanism box and the grounding cabinet.

[0058] See also Figure 1 , provides an embodiment of the locking control device of the rail transit knife switch of the present application, the locking control device includes a transfer switch module 110, a measurement and control module 120, a relay group 130 and a communication module 140, wherein the transfer switch module 110 is provided with three gears, namely, the unlocking gear, the grounding gear and the locking gear.

[0059] The transfer switch module 110 is used to realize local control of the isolation knife switch mechanism box and the knife switch on the grounding cabinet, and the measurement and control module 120, the relay group 130 and the communication module 140 are used to realize remote control of the isolation knife switch mechanism box and the knife switch on the grounding cabinet.

[0060] It is understandable that three control loops are formed in the locking control device by the provided switching module 110 , the measurement and control module 120 and the relay group 130 , namely, a ground unlocking locking loop, a connection unlocking locking loop and a mutual locking loop.

[0061] In this embodiment, the unlocking locking circuit, the unlocking locking circuit and the mutual locking circuit are actually formed by interconnecting the transfer switch module 110, the relay group 130, the isolation switch and the earthing switch; the measurement and control module 120 is connected to the relay group 130 and the communication module 140 respectively; specifically, after the transfer switch module 110 is connected to the relay group 130, it is connected in parallel with the auxiliary contacts of the isolation switch, and the auxiliary contacts of the isolation switch are connected in series with the motor of the earthing switch to form the unlocking locking circuit; after the transfer switch module 110 is connected to the relay group 130, it is connected in parallel with the auxiliary contacts of the earthing switch, and the auxiliary contacts of the earthing switch are connected in series with the motor of the isolation switch to form the unlocking locking circuit; the transfer switch module 110 is connected to the relay group 130, and the relay group 130 is connected to the measurement and control module 120 to form a mutual locking circuit; the measurement and control module 120 is also connected to the communication module 140.

[0062] In this embodiment, the measurement and control module 120 is specifically configured to: in the local locking mode, the transfer switch module 110 controls the unlocking locking circuit to perform unlocking control, controls the unlocking locking circuit to perform unlocking control, or controls the mutual locking circuit to perform interlocking control by switching to the corresponding gear position;

[0063] In this embodiment, the measurement and control module 120 is specifically used for: in the remote control locking mode, the measurement and control module 120 receives the locking control instruction sent from the outside through the communication module 140, and based on the locking control instruction, performs the unlocking control of the unlocking locking circuit through the relay group 130, or performs the unlocking control of the unlocking locking circuit, or performs the interlocking control of the mutual locking circuit.

[0064] It should be noted that the conversion switch module 110 is a switching circuit composed of multiple switches. According to different gears, pairs of switches in the switch circuit are combined and correspond to one gear. For example, according to the setting of three gears, the conversion switch module 110 is set to a switching circuit composed of 5 switches, namely switches 1-5. Here, switches 1 and 2 can be defined as corresponding to the unlocking gear, switches 3 and 4 correspond to the unlocking gear, and switch 5 corresponds to the locking gear. The corresponding gear is switched by controlling the closure of the switches on the conversion switch module 110 to achieve on-off control of the corresponding locking circuit.

[0065] In actual application, when it is determined that the locking control of the isolation switch or the grounding switch controlled by hard wiring is abnormal, and local control is selected, the operator switches the gear of the conversion switch module 110 on the locking control device. After switching to the corresponding gear, the locking operation of the isolation switch and the grounding switch is realized.

[0066] In one feasible implementation, the locking control device further includes:

[0067] The display module 150 is connected to the conversion switch module 110 and the measurement and control module 120 respectively, and is used to display the corresponding locking operation mode according to the gear position switched by the conversion switch module 110 and the control instruction switched by the measurement and control module 120, wherein the locking operation mode includes remote control unlocking mode, remote control ground unlocking mode, mutual locking mode, local unlocking mode and local ground unlocking mode.

[0068] Specifically, when switching to the unlocking position, that is, switches 1 and 2 are closed, the measurement and control module 120 controls the corresponding unlocking position indicator light to display when detecting that switch 2 is closed, and the other gears are controlled similarly.

[0069] In this embodiment, the switching module 110 includes a first switch group, a second switch group, and a third switch group; the relay group 130 includes a first relay and a second relay;

[0070] One switch in the first switch group is connected in series with the normally closed contact of the first relay to form a first branch, the first branch is connected in parallel with the auxiliary contact of the isolation switch and the normally open contact of the first relay respectively, the auxiliary contact of the isolation switch is connected in series with the motor of the grounding switch, and another switch in the first switch group is connected to the measurement and control module to obtain a release lockout circuit;

[0071] One switch in the second switch group is connected in series with the normally closed contact of the second relay to form a second branch, the second branch is respectively connected in parallel with the auxiliary contact of the grounding switch and the normally open contact of the second relay, the auxiliary contact of the grounding switch is connected in series with the motor of the isolation switch, and another switch of the second switch group is connected to the measurement and control module to obtain a ground release locking circuit.

[0072] It should be noted that the first switch group and the second switch group are each provided with two switches, such as Figure 2 As shown, the first switch group consists of contacts 1 / 2 and contacts 5 / 6 of QK in the figure. Contacts 1 / 2 are connected to the first relay KA1, the auxiliary contact S1 of the isolation switch, and the motor M2 of the grounding switch, forming a release lock circuit. The auxiliary contact S1 of the isolation switch and the motor M2 of the grounding switch are connected in series and then connected to the power supply. Contacts 1 / 2 are connected in series with the normally closed contacts 21 / 22 in the first relay KA1 and then connected in parallel to the auxiliary contact S1. The auxiliary contact S1 is also a normally closed contact. At the same time, the auxiliary contact S1 is also connected in parallel with the normally open contacts 11 / 12 in the first relay KA1.

[0073] In actual application, when switching to the release position, the contacts 1 / 2 of QK are closed. At this time, the auxiliary contact S1 is short-circuited, that is, there is no linkage control relationship between the auxiliary contact S1 of the isolation switch and the motor M2 of the grounding switch. When the switch is subsequently controlled, the closing of the isolation switch can only be controlled by closing the grounding switch.

[0074] like Figure 3 As shown, the second switch group consists of contacts 3 / 4 and contacts 7 / 8 of QK in the figure. Contacts 3 / 4 are connected to the second relay KA2, the auxiliary contact S2 of the grounding switch, and the motor M1 of the isolation switch, forming a ground release locking circuit. The auxiliary contact S2 of the grounding switch is connected in series with the motor M1 of the isolation switch and then connected to the power supply. Contacts 3 / 4 are connected in series with the normally closed contacts 21 / 22 in the second relay KA2 and then connected in parallel to the auxiliary contact S2, which is also a normally closed contact. At the same time, the auxiliary contact S2 is also connected in parallel with the normally open contacts 11 / 12 in the second relay KA2.

[0075] In actual application, when switching to the grounding position, the contacts 3 / 4 of QK are closed. At this time, the auxiliary contact S2 is short-circuited, that is, the auxiliary contact S2 of the grounding switch and the motor M1 of the isolation switch no longer have a linkage control relationship. When the switch is subsequently controlled, the closing of the grounding switch can only be controlled by closing the isolation switch.

[0076] Based on the circuit structure of the above-mentioned locking loop, when controlling the on / off of the isolation switch and the grounding switch, in the local locking mode, the on / off control of the switch is achieved by controlling the contacts 1 / 2, contacts 3 / 4, or contacts 9 / 10 in the switching module 11; in the remote control locking mode, the on / off control of the switch is achieved by controlling the normally open contacts 11 / 12 of the first relay KA1 and the normally open contacts 11 / 12 of the first relay KA2 in the relay group.

[0077] In this embodiment, the measurement and control module 120 includes an open output loop and an open input loop;

[0078] The switching module 110 and the relay group 130 are connected in series in the open-in circuit to monitor the actual state of the locking operation mode;

[0079] The relay group 130 is connected in series in the output circuit, and is used to control the display module to display the corresponding locking control mode.

[0080] It is understandable that the switching module 110 connected in series in the open circuit is actually a switch composed of contacts 5 and 6, a switch composed of contacts 7 and 8, and a switch composed of contacts 9 and 10 in the switching module 110, which are then connected to the measurement and control module 120 respectively. Figure 4 As shown, the interlocking circuit is actually a control circuit formed by connecting the switches 9 and 10 in the transfer switch module 110 in series with the measurement and control module 120. It should be noted that the first switch group, the second switch group, and the third switch group in the transfer switch module 110 are mutually exclusive, that is, if one of the three is closed, the other two must be open.

[0081] Furthermore, a state detection circuit in remote locking mode is provided in the open-in loop, that is, the normally open contacts 13 / 14 of the first relay KA1 and the normally open contacts 13 / 14 of the second relay KA2 are connected to the measurement and control module 120 respectively.

[0082] That is, the open circuit is used to monitor and confirm the actual execution status of the knife switch control. It has five detection branches according to the locking operation mode, namely the local release status detection branch, the local release status detection branch, the locking status detection branch, the remote control release status detection branch and the remote control release status detection branch. The detection branches are parallel and mutually exclusive.

[0083] It should be noted that the measurement and control module 120 includes an output circuit and a detection circuit, wherein the detection circuit is connected to the switch composed of contacts 5 and 6, the switch composed of contacts 7 and 8, the switch composed of contacts 9 and 10, the normally open contacts 13 / 14 of the first relay KA1 and the normally open contacts 13 / 14 of the second relay KA2 in the conversion switch module 110 to form an input circuit, and the switch composed of contacts 5 and 6, the switch composed of contacts 7 and 8, the switch composed of contacts 9 and 10, the normally open contacts 13 / 14 of the first relay KA1 and the normally open contacts 13 / 14 of the second relay KA2 in the conversion switch module 110 are in parallel and are respectively connected in series with an output terminal of the detection circuit.

[0084] In this embodiment, the output circuit is actually composed of the output circuit in the measurement and control module 120, the first relay KA1, the second relay KA2 and the display module 150. Figure 5 Through this open circuit, the mutual exclusive control of the switch on and off and the status display control can be realized.

[0085] Similar to the opening circuit, five opening display branches are set according to the locking operation mode, namely the local opening display branch, the local opening display branch, the locked opening display branch, the remote control opening display branch and the remote control opening display branch. The opening display branches are parallel and mutually exclusive. Among them, the coils of the first relay and the second relay are connected in parallel in the two remote control branches to realize mutually exclusive control, and the normally closed contacts 23 / 24 of the first relay and the second relay are connected in series in the locking branch.

[0086] The locking control device for a rail transit knife switch provided in this embodiment includes a transfer switch module with three gears, a measurement and control module, a relay group and a communication module; the transfer switch module, the relay group are interconnected with the isolation knife switch and the earthing knife switch to form a release locking circuit, a release ground locking circuit and a mutual locking circuit; the measurement and control module is connected to the relay group and the communication module respectively; in the local locking mode, the transfer switch module controls the on-off of the release locking circuit, the release ground locking circuit and the mutual locking circuit by switching different gears to achieve knife switch interlocking control of the isolation knife switch and the earthing knife switch; in the remote locking mode, the measurement and control module receives a locking control instruction sent from the outside through the communication module, and controls the on-off of the release locking circuit, the release ground locking circuit and the mutual locking circuit through the relay group based on the locking control instruction to achieve knife switch interlocking control of the isolation knife switch and the earthing knife switch. The on-off control here should be understood as release, release ground or interlocking control. This embodiment realizes the rapid implementation of grounding or power supply switching without removing the hardware wiring through the collaborative design of the locally controlled transfer switch module and the remotely controlled relay group, so as to solve the problem of low control efficiency and unsafe locking control scheme when the isolation switch and the grounding switch cannot be controlled by hard wiring in the prior art, and also improves the maintenance efficiency.

[0087] See also Figure 6 , provides an embodiment of the locking system of the rail transit knife switch of the present application, the system includes the above-mentioned rail transit knife switch locking control device 610, the isolation knife switch mechanism box 620 and the grounding cabinet 630, the locking control device 610 is installed in the track area, the isolation knife switch mechanism box 620 and the grounding cabinet 630 are respectively connected to the locking control device 610 through cables, and the locking control device 610 controls the three states of release, locking and local between the isolation knife switch mechanism box 620 and the grounding cabinet 630 through local locking mode or remote control locking mode.

[0088] It should be noted that "unlocking" means releasing the lock of the isolation switch on the grounding switch, that is, the isolation switch can only be controlled by the grounding switch; "ungrounding" means releasing the lock of the grounding switch on the isolation switch, that is, the grounding switch can only be controlled by the isolation switch; "locking" means that the isolation switch and the grounding switch are locked to each other.

[0089] In this embodiment, the conversion switch module and the first relay are connected between the normally closed contact of the knife switch in the isolation knife switch mechanism box and the motor in the grounding cabinet to form an unlocking locking circuit; and the conversion switch module and the second relay are connected between the motor in the isolation knife switch mechanism box and the normally closed contact of the knife switch in the grounding cabinet to form an unlocking locking circuit.

[0090] It should be noted that the isolation switch mechanism box 620 is composed of the normally closed contact S1 of the isolation switch and the motor M1; the grounding cabinet 630 is composed of the normally closed contact S2 of the grounding switch and the motor M2; during the actual maintenance process, when the isolation switch is in the closed position, S1 is disconnected; when the grounding switch is in the closed position, S2 is disconnected.

[0091] The locking control device 610 includes a switching switch module QK, a display module (which can be set with indicator lights, including remote control, remote control, locking, local control, and local release), a measurement and control module, a relay group (specifically including relays KA1 and KA2), and a communication module.

[0092] The isolation knife switch mechanism box 620 and the grounding cabinet 630 are respectively connected to the locking control device 610 through cables. The locking control device 610 can control the three states of open, locked and local between the isolation knife switch mechanism box and the grounding cabinet through local and remote locking methods.

[0093] When the locking system of the rail transit knife switch locks the isolation knife switch mechanism box 620 and the grounding cabinet 630 in the local locking mode, it is specifically achieved by controlling the different gears on the transfer switch module. Figure 2-5 7 and the circuit schematic diagram are provided for detailed explanation.

[0094] Figure 7 The figure shows the principle diagram of the locking system in the local locking mode. There are two sets of cables connecting the isolation switch mechanism box 620 and the grounding cabinet 630. These are the cables for locking the isolation switch to the grounding switch and the cables for locking the grounding switch to the isolation switch. These two sets of cables are respectively connected to the transfer switch module in the locking control device 610. In other words, the two sets of cables correspond to the above-mentioned unlocking locking circuit and unlocking locking circuit, respectively.

[0095] For a set of cables corresponding to the unlocking locking circuit, the normally closed contact S1 of the isolating switch is connected to the motor M2 that controls the grounding 610 switch. Between S1 and M2 are connected the contacts 1 / 2 in the switching module QK of the locking device, the normally closed contacts 21 / 22 and the normally open contacts 11 / 12 of the first relay KA1.

[0096] For the ground release locking circuit, a group of cables corresponding to the grounding switch is connected to the normally closed contact S2 of the grounding switch and the motor M1 of the isolation switch. Between S2 and M1, the contacts 3 / 4 in the locking control device switching module QK, the normally closed contacts 21 / 22 and the normally open contacts 11 / 12 of the second relay KA1 are connected.

[0097] The transfer switch module QK has three states, namely, unlocked, unlocked and locked.

[0098] When the transfer switch module is switched to the release position, contacts 1 / 2 of QK are conductive, releasing the isolation switch and the grounding switch. At the same time, contacts 5 / 6 of QK are also conductive. After the measurement and control module detects the position change of contacts 5 / 6 of QK, it controls D04 and lights the local release indicator.

[0099] When the transfer switch module is switched to the grounding release position, contacts 3 / 4 of QK are conducting, releasing the grounding switch from locking and isolating the switch. At the same time, contacts 7 / 8 of QK are also conducting. When the measurement and control module detects the conduction change of contacts 7 / 8 of QK, it controls D05 and lights the local grounding release indicator.

[0100] When the transfer switch module is switched to the locked position, contacts 1 / 2 and contacts 3 / 4 of QK are disconnected, locking the isolation switch and the grounding switch. At the same time, contacts 9 / 10 of QK are connected. After the measurement and control module detects the change in position of contacts 9 / 10 of QK, it controls D03 to turn on, lighting the lock indicator light.

[0101] Therefore, by locally locking and controlling the transfer switch module on site, the isolation switch and the grounding switch can be locked with each other, thereby improving the efficiency of on-site operations.

[0102] In this embodiment, if Figure 8 As shown, the locking system further includes a switch 640 and a control host 650;

[0103] The control host 650 is connected to the switch 640 through an optical fiber / network cable, and the switch 640 is connected to the communication module in the locking control device 610 through the network. The control host 650 is used to obtain the knife switch status of the isolation knife switch mechanism box 620 and the grounding cabinet 630, and judge whether the knife switch status meets the preset remote control conditions, and control the isolation knife switch mechanism box 620 and the grounding cabinet 640 to be in three states: unlocked, locked and on-site based on the judgment result.

[0104] based on Figure 2-5 According to the circuit principle, when the locking system locks the isolation switch mechanism box 620 and the grounding cabinet 630 in the remote control locking mode, the control host 650 specifically determines the conditions met based on the current switch states of the isolation switch and the grounding switch. The conditions here include the remote control conditions for unlocking, unlocking, and locking, that is, it determines whether the initial state requirements of the switch in unlocking, unlocking, and locking are met.

[0105] If one of the conditions is met, the corresponding indicator light will also be displayed, and then the operator can perform the corresponding remote control operation. For example, if the display shows remote grounding, D02 will be controlled to open, thereby controlling the grounding operation of the grounding cabinet through the second relay KA2.

[0106] The system provided in this embodiment, through the coordinated design of the locally controlled transfer switch module and the remotely controlled relay group, can quickly achieve grounding or power supply switching without removing the hardware wiring, so as to solve the problem of low control efficiency and unsafe locking control scheme when the isolation switch and the grounding switch cannot be controlled by hard wiring in the prior art, and also improve the maintenance efficiency.

[0107] Furthermore, the interlocking design between the measurement and control module and the relay group is used to avoid malfunctions caused by conflicts between power supply and grounding, thereby enhancing system safety. At the same time, the display design of the locked operation mode allows real-time feedback of operation results, taking into account the dual needs of flexible control and status visualization, and solving the problems of relying on manual investigation, single operation mode and prominent safety hazards in the existing technology.

[0108] See also Figure 9 , provides an embodiment of the locking control method of the rail transit knife gate of the present application, the method provided in this embodiment is mainly applied to the locking system of the rail transit knife gate provided in the above embodiment, and the method includes the following steps:

[0109] Step S910: In the local locking mode, the switching module is controlled to switch to the corresponding gear, and the unlocking locking circuit is controlled to perform unlocking control, or the unlocking locking circuit is controlled to perform unlocking control, or the mutual locking circuit is controlled to perform interlocking control.

[0110] It can be understood here that in the local locking mode, the conversion switch module is controlled to switch to the target gear position, and the isolation knife switch mechanism box and the motor in the grounding cabinet are controlled to be on and off under the target gear position to achieve locking and retraction.

[0111] Specifically, in the local locking mode, the transfer switch module is controlled to switch to the unlocking position to release the locking linkage control of the isolation switch on the grounding switch; the first switch group in the transfer switch module is controlled to be turned on to realize the independent opening and closing control of the isolation switch;

[0112] In the local locking mode, the transfer switch module is controlled to switch to the ground release position to release the locking linkage control of the grounding switch on the isolation switch; the second switch group in the transfer switch module is controlled to be turned on to realize the independent opening and closing control of the grounding switch;

[0113] In the local locking mode, the switching switch module is controlled to switch to the locking position to maintain the locking linkage control of the isolation switch and the earthing switch; the third switch group in the switching switch module is controlled to be turned on to realize the mutually exclusive opening and closing control of the isolation switch and the earthing switch.

[0114] It is understandable that the transfer switch module of the locking control device includes three physical gears, and these three physical gears are all set for the local locking mode, specifically:

[0115] The unlock position is used to release the locking of the isolation switch to the grounding switch;

[0116] The ground release position is used to release the locking of the grounding switch on the isolation switch;

[0117] The locking position is used to restore the mutual locking between the isolation switch and the grounding switch.

[0118] In this embodiment, the measurement and control module on the locking control device is configured to be linked with the transfer switch module, and the indicator light is controlled to turn on and off by collecting the status of the contacts on the transfer switch module. The indicator light includes local release, local unlock and locking status indication.

[0119] The following combination Figure 2-5 7. There are two sets of cables connecting the isolation switch mechanism box 620 and the grounding cabinet 630. These are the cables for locking the isolation switch to the grounding switch and the cables for locking the grounding switch to the isolation switch. These two sets of cables are connected to the transfer switch module in the locking control device 610. In other words, the two sets of cables correspond to the aforementioned unlocking and unlocking locking circuits, respectively.

[0120] For a set of cables corresponding to the unlocking locking circuit, the normally closed contact S1 of the isolating switch is connected to the motor M2 that controls the grounding 610 switch. Between S1 and M2 are connected the contacts 1 / 2 in the switching module QK of the locking device, the normally closed contacts 21 / 22 and the normally open contacts 11 / 12 of the first relay KA1.

[0121] For the ground release locking circuit, a group of cables corresponding to the grounding switch is connected to the normally closed contact S2 of the grounding switch and the motor M1 of the isolation switch. Between S2 and M1, the contacts 3 / 4 in the locking control device switching module QK, the normally closed contacts 21 / 22 and the normally open contacts 11 / 12 of the second relay KA1 are connected.

[0122] The transfer switch module QK has three states, namely, unlocked, unlocked and locked.

[0123] When the transfer switch module is switched to the release position, contacts 1 / 2 of QK are conductive, releasing the isolation switch and the grounding switch. At the same time, contacts 5 / 6 of QK are also conductive. After the measurement and control module detects the position change of contacts 5 / 6 of QK, it controls D04 and lights the local release indicator.

[0124] When the transfer switch module is switched to the grounding release position, contacts 3 / 4 of QK are conducting, releasing the grounding switch from locking and isolating the switch. At the same time, contacts 7 / 8 of QK are also conducting. When the measurement and control module detects the conduction change of contacts 7 / 8 of QK, it controls D05 and lights the local grounding release indicator.

[0125] When the transfer switch module is switched to the locked position, contacts 1 / 2 and contacts 3 / 4 of QK are disconnected, locking the isolation switch and the grounding switch. At the same time, contacts 9 / 10 of QK are connected. After the measurement and control module detects the change in position of contacts 9 / 10 of QK, it controls D03 to turn on, lighting the lock indicator light.

[0126] Step S920: In the remote control locking mode, the measurement and control module controls the communication module to receive the locking control instruction sent from the outside, and controls the relay group based on the locking control instruction to control the unlocking of the locking circuit, or to control the unlocking of the locking circuit, or to control the interlocking of the on-off control of the mutually locked circuits.

[0127] It can be understood here that in the remote control locking mode, an unlocking instruction is generated and sent to the measurement and control module, and the measurement and control module controls the on and off of the isolation switch mechanism box and the motor in the grounding cabinet through the relay group to realize the locking.

[0128] Specifically, in the remote control locking mode, the knife switch status of the isolation knife switch mechanism box and the grounding cabinet is obtained, and it is determined whether the knife switch status meets the preset remote control conditions. Based on the judgment result, the measurement and control module controls the on and off of the motor in the isolation knife switch mechanism box and the grounding cabinet through the relay group to achieve locking.

[0129] In this embodiment, the measurement and control module in the locking control device is further used to detect the actual status of the switch contacts in the conversion switch module and the relay group, and determine whether the corresponding locking control is performed normally based on the actual status.

[0130] It should be noted that after determining the remote control locking mode, the conditions that are met are judged based on the current switch status of the isolation switch and the earthing switch. The conditions here include the remote control conditions for unlocking, the remote control conditions for unlocking, and the remote control conditions for locking, that is, it is judged whether the initial state requirements of the switch in unlocking, unlocking and locking are met.

[0131] If one of the conditions is met, the corresponding indicator light will also be displayed, and then the operator can perform the corresponding remote control operation. For example, if the display shows remote grounding, D02 will be controlled to open, thereby controlling the grounding operation of the grounding cabinet through the second relay KA2.

[0132] In this embodiment, the measurement and control module controls the on / off of the isolation switch mechanism box and the motor in the grounding cabinet through the relay group based on the judgment result to achieve locking and retraction, including:

[0133] If the result of the judgment is that the remote control condition for disconnection is met, the measurement and control module connects the first relay in the relay group based on the generated disconnection instruction, and releases the locking linkage control of the grounding switch on the isolation switch, so as to realize the independent opening and closing control of the grounding switch;

[0134] If the result of the judgment is that the remote control condition for ground release is met, the measurement and control module turns on the second relay in the relay group based on the generated ground release instruction, and releases the locking linkage control of the grounding switch on the isolation switch, so as to realize the independent opening and closing control of the grounding switch;

[0135] If the judgment result is that the remote control conditions for locking are met, the measurement and control module keeps the first relay and the second relay in the relay group working in the default state based on the generated locking instruction to achieve mutually exclusive opening and closing control of the isolation switch and the grounding switch.

[0136] The following combination Figure 2-5 The circuit schematic diagram provided in Figure 7 is described in detail. When remote control unlocking is required, the control host first performs a logical judgment on the current switch status of the isolation switch and the grounding switch to determine whether the remote control conditions are met. If a release command is issued, it is sent to the communication module on the locking control device through the switch. After receiving the release command, the communication module forwards the command to the measurement and control module, which turns on D01, and the remote control unlocking indicator light turns on. At the same time, the coil of the first relay KA1 is energized, and the contacts 11 / 12 of KA1 are turned on, releasing the lock of the isolation switch on the grounding switch.

[0137] If the grounding release command is issued, the measurement and control module turns on D02, and the remote grounding release indicator light turns on. At the same time, the coil of the second relay KA2 is energized, and the contacts 11 / 12 of KA2 are conductive, releasing the grounding switch from locking the isolation switch.

[0138] When no operation is performed on the locking system backend, D01 and D02 are both closed, and contacts 23 / 24 of KA1 and KA2 are both normally closed, so the locking indicator light is on. In order for the locking system backend to know in real time whether the first relay KA1 and the second relay KA2 are operating, the closed state of contacts 13 / 14 of the first relay KA1 and the second relay KA2 is collected. This allows the backend to know in real time whether the remote unlocking is executed normally and the corresponding status.

[0139] In order to ensure the safety of unlocking, the uniqueness of remote control and ground unlocking is designed. That is, the local locking mode and the remote control locking mode are set to a mutually exclusive control relationship. When the local locking throw and release operation is in progress, the remote control locking throw and release operation is not allowed. When the remote control locking throw and release operation is in progress, the local locking throw and release operation is not allowed. Figure 2-5 During local unlocking, if the measurement and control module detects that contacts 5 / 6 or contacts 7 / 8 of the transfer switch module QK are conducting, the measurement and control module cannot open D01 and D03. Therefore, the coils of the first relay KA1 and the second relay KA2 are de-energized, making remote unlocking impossible. During remote unlocking, D01 or D02 opens, and the coils of the first relay KA1 and the second relay KA2 are energized. Contacts 21 / 22 of the first relay KA1, which are connected in series with contacts 1 / 2 of the transfer switch module QK, are normally closed contacts and are disconnected, preventing local unlocking by rotating the transfer switch module QK. Similarly, contacts 21 / 22 of the second relay KA2, which are connected in series with contacts 3 / 4 of the transfer switch module QK, are normally closed contacts and are disconnected, preventing local unlocking by rotating the transfer switch module QK. Through the above design, the uniqueness of remote and local locking is achieved.

[0140] In one feasible implementation manner, before performing the unlocking, unlocking or interlocking control, the method further includes:

[0141] Step S930: Detect whether the knife switch lock in the isolation knife switch mechanism box or the grounding cabinet is abnormal.

[0142] When it is detected that the isolation knife switch mechanism box or the knife switch in the grounding cabinet is locked abnormally, the corresponding locking mode is determined.

[0143] It should be noted that the locking mode includes a local locking mode and a remote locking mode, and the local locking mode and the remote locking mode are in a mutually exclusive control relationship.

[0144] The local locking mode should be understood as the operator directly performing locking control on the switching module of the locking control device; the remote locking mode should be understood as the operator remotely performing locking control on the control host by transmitting instructions through the network.

[0145] The knife switch locking abnormality here refers to the situation where the isolation knife switch or the grounding knife switch cannot be locked and controlled by hard wiring. After determining the knife switch locking abnormality, the locking mode that the operator can use is determined, that is, the local locking mode or the remote control locking mode. Specifically, it is determined by identifying the conditions of the work site and determining whether on-site operation is allowed based on the conditions of the work site. If allowed, both modes can be selected, and the local locking mode is preferred. If not allowed, the remote control locking mode is selected.

[0146] In this embodiment, by locally operating the gear switching of the transfer switch module and the coordinated control of the relay, it is possible to quickly engage and disengage the lock without dismantling the hard wiring, thereby significantly improving maintenance efficiency; by utilizing the interlocking logic of the measurement and control module and the relay, the execution authority of local and remote control operations is forcibly restricted to avoid malfunctions caused by operational conflicts and enhance system safety; at the same time, through the linkage design of the communication module and the display module, the operation results are fed back in real time, taking into account the dual needs of flexible control and status visualization, and solving the problems of relying on manual investigation, single operation mode and prominent safety hazards in the existing technology.

[0147] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0148] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A locking control method for a rail transit knife switch, applied to a locking control device, characterized in that: The locking control device is installed in the track area and is respectively connected to the knife switch mechanism box and the grounding cabinet; the locking control device includes: a three-position transfer switch module, a measurement and control module, a relay group and a communication module connected to the measurement and control module; After the transfer switch module is connected to the relay group, it is connected in parallel with the auxiliary contact of the isolation switch, and the auxiliary contact of the isolation switch is connected in series with the motor of the grounding switch to form a release locking circuit; After the transfer switch module is connected to the relay group, it is connected in parallel with the auxiliary contact of the grounding switch, and the auxiliary contact of the grounding switch is connected in series with the motor of the isolation switch to form a ground release locking circuit; The transfer switch module is connected to the relay group, and the relay group is connected to the measurement and control module to form a mutual locking loop; The locking control method includes: In the local locking mode, by controlling the conversion switch module to switch the corresponding gear, the unlocking locking circuit is controlled to perform unlocking control, or the unlocking ground locking circuit is controlled to perform unlocking control, or the mutual locking circuit is controlled to perform interlocking control; In the remote control locking mode, the measurement and control module controls the communication module to receive the locking control instructions sent from the outside, and controls the relay group based on the locking control instructions to perform the opening and closing control of the unlocking locking circuit, or to perform the opening and closing control of the unlocking locking circuit, or to perform the interlocking control of the on-off control of the mutual locking circuits.

2. The locking control method for rail transit knife gate according to claim 1, characterized in that: The transfer switch module includes a first switch group, a second switch group and a third switch group; the relay group includes a first relay and a second relay; One switch in the first switch group is connected in series with the normally closed contact of the first relay to form a first branch, the first branch is connected in parallel with the auxiliary contact of the isolation switch and the normally open contact of the first relay respectively, the auxiliary contact of the isolation switch is connected in series with the motor of the grounding switch, and another switch in the first switch group is connected to the measurement and control module to obtain a release lockout circuit; One switch in the second switch group is connected in series with the normally closed contact of the second relay to form a second branch, the second branch is respectively connected in parallel with the auxiliary contact of the grounding switch and the normally open contact of the second relay, the auxiliary contact of the grounding switch is connected in series with the motor of the isolation switch, and another switch of the second switch group is connected to the measurement and control module to obtain a ground release locking circuit.

3. The locking control method for rail transit knife gate according to claim 1, characterized in that: In the local locking mode, the switching of the switching module to different gears is controlled to control the on / off of the unlocking locking circuit, the unlocking locking circuit, and the mutual locking circuit, including: In the local locking mode, the transfer switch module is controlled to switch to the unlocking position to release the locking linkage control of the isolation switch on the grounding switch; the first switch group in the transfer switch module is controlled to be turned on to realize the independent opening and closing control of the isolation switch; In the local locking mode, the transfer switch module is controlled to switch to the ground release position to release the locking linkage control of the grounding switch on the isolation switch; the second switch group in the transfer switch module is controlled to be turned on to realize the independent opening and closing control of the grounding switch; In the local locking mode, the switching switch module is controlled to switch to the locking position to maintain the locking linkage control of the isolation switch and the earthing switch; the third switch group in the switching switch module is controlled to be turned on to realize the mutually exclusive opening and closing control of the isolation switch and the earthing switch.

4. The locking control method for rail transit knife gate according to claim 1, characterized in that: In the remote control locking mode, the measurement and control module controls the communication module to receive a locking control instruction sent from the outside, and controls the relay group based on the locking control instruction to control the on / off of the unlocking locking circuit, the unlocking ground locking circuit, and the mutual locking circuit, including: In the remote control locking mode, the measurement and control module controls the communication module to obtain the knife switch status of the isolation knife switch mechanism box and the grounding cabinet, and determines whether the knife switch status meets the preset remote control conditions. Based on the judgment result, the relay group is used to control the on and off of the motor in the isolation knife switch mechanism box and the grounding cabinet to achieve locking.

5. The locking control method for rail transit knife gate according to claim 4, characterized in that: Based on the judgment result, the isolation switch mechanism box and the motor in the grounding cabinet are controlled by the relay group to realize the locking and disengagement, including: If the result of the judgment is that the remote control condition for disconnection is met, the measurement and control module connects the first relay in the relay group based on the generated disconnection instruction, and releases the locking linkage control of the grounding switch on the isolation switch, so as to realize the independent opening and closing control of the grounding switch; If the result of the judgment is that the remote control condition for ground release is met, the measurement and control module turns on the second relay in the relay group based on the generated ground release instruction, and releases the locking linkage control of the grounding switch on the isolation switch, so as to realize the independent opening and closing control of the grounding switch; If the judgment result is that the remote control conditions for locking are met, the measurement and control module keeps the first relay and the second relay in the relay group working in the default state based on the generated locking instruction to achieve mutually exclusive opening and closing control of the isolation switch and the grounding switch.

6. The locking control method for a rail transit knife gate according to any one of claims 1 to 5, characterized in that: The locking control method further includes: The actual states of the switch contacts in the conversion switch module and the relay group are detected by the measurement and control module, and whether the corresponding locking control is performed normally is determined based on the actual states.

7. The locking control method for a rail transit knife gate according to any one of claims 1 to 5, characterized in that: The locking control method further includes: According to the gear position switched by the conversion switch module and the control instruction switched by the measurement and control module, the corresponding locking operation mode is displayed, wherein the locking operation mode includes remote control unlocking mode, remote control ground unlocking mode, mutual locking mode, local unlocking mode and local ground unlocking mode.

8. A locking control device for a rail transit knife switch, characterized in that: The locking control device is installed in the track area and is respectively connected to the knife switch mechanism box and the grounding cabinet; the locking control device includes: a three-position transfer switch module, a measurement and control module, a relay group and a communication module connected to the measurement and control module; After the transfer switch module is connected to the relay group, it is connected in parallel with the auxiliary contact of the isolation switch, and the auxiliary contact of the isolation switch is connected in series with the motor of the grounding switch to form a release locking circuit; After the transfer switch module is connected to the relay group, it is connected in parallel with the auxiliary contact of the grounding switch, and the auxiliary contact of the grounding switch is connected in series with the motor of the isolation switch to form a ground release locking circuit; The transfer switch module is connected to the relay group, and the relay group is connected to the measurement and control module to form a mutually locked loop; the measurement and control module is also connected to the communication module; The measurement and control module is used for: In the local locking mode, by controlling the conversion switch module to switch the corresponding gear, the unlocking locking circuit is controlled to perform unlocking control, or the unlocking locking circuit is controlled to perform unlocking control, or the mutual locking circuit is controlled to perform interlocking control; In the remote control locking mode, the communication module is controlled to receive the locking control instruction sent from the outside, and the relay group is controlled based on the locking control instruction to perform unlocking control on the unlocking locking circuit, or to perform unlocking control on the unlocking locking circuit, or to perform interlocking control on the mutual locking circuits.

9. The locking control device for rail transit arrival at a station according to claim 8, characterized in that: The measurement and control module includes an output circuit and an input circuit; The switching module and the relay group are connected in series in the open-in circuit for monitoring the actual state of the locking operation mode; The relay group is connected in series in the output circuit, and is used to control the display module to display the corresponding locking control mode.

10. The locking control device for a rail transit knife gate according to claim 8 or 9, characterized in that: The locking control device also includes: A display module is connected to the conversion switch module and the measurement and control module respectively, and is used to display the corresponding locking operation mode according to the gear position switched by the conversion switch module and the control instruction switched by the measurement and control module, wherein the locking operation mode includes remote control unlocking mode, remote control unlocking mode, mutual locking mode, local unlocking mode and local unlocking mode.

11. A locking system for a rail transit knife gate, characterized in that: The system includes a locking control device for a rail transit knife switch as described in any one of claims 8 to 10, an isolating knife switch mechanism box and a grounding cabinet, wherein the isolating knife switch mechanism box and the grounding cabinet are respectively connected to the locking control device via cables, and the locking control device controls the three states of unlocking, locking and local between the isolating knife switch mechanism box and the grounding cabinet through a local locking mode or a remote control locking mode.

12. The locking system for rail transit knife gate according to claim 11, characterized in that: The locking system also includes a switch and a control host; The control host is connected to the switch through an optical fiber / network cable, and the switch is connected to the communication module through a network. The control host is used to obtain the switch status of the isolation knife switch mechanism box and the grounding cabinet, and judge whether the switch status meets the preset remote control conditions, and control the isolation knife switch mechanism box and the grounding cabinet to three states: unlocked, locked and local based on the judgment result.

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