An operating state monitoring circuit for a two-thirds wiring line

Abstract

The application discloses a kind of operating state monitoring circuits of two-thirds wiring line, comprising: first switch, second switch, line operating state judging unit, side switch split / combination position monitoring circuit, first switch controller, middle switch split / combination position monitoring circuit, second switch controller;First switch, second switch and line operating state judging unit are connected in series;Side switch split / combination position monitoring circuit and first switch controller are connected in series in the positive and negative terminal of the main power supply of operating state monitoring circuit;Middle switch split / combination position monitoring circuit and second switch controller are connected in series in the positive and negative terminal of the main power supply.The above technical scheme can be used to realize the automatic monitoring of operating state monitoring circuit, avoid the problem that switch state selection handle QK-1 and QK-2 are not switched in time, and improve the accuracy of line state judgment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power system, and particularly relates to a running state monitoring circuit of a two-thirds connection line. BACKGROUND

[0002] With the continuous strengthening and improvement of high-voltage power grid construction in China, the requirement for reliable and stable operation of the power grid is also higher and higher, and the two-thirds connection mode is widely used in 500kV and above voltage level substations due to its high power supply reliability, good operation flexibility, and convenient operation and maintenance.

[0003] Figure 1 is a simplified schematic diagram of a two-thirds connection primary connection in the prior art, referring to Figure 1 , the two-thirds connection adopts three switches (edge switch 5011, middle switch 5012, and edge switch 5013) in series, connected to two buses, and a line is connected between each two switches to form an A line and a B line. Under the two-thirds connection mode, the running state of the line needs to be judged according to the state of the two switches, taking the A line as an example, the running state of the line needs to be judged according to the state of the edge switch 5011 and the middle switch 5012, when any one switch is in the closed position or both switches are in the closed position, the line is in the running state, and when both switches are in the open position, the line is in the shutdown state. Figure 2 is a simplified schematic diagram of a running state monitoring circuit in the prior art, referring to Figure 2 , the split switch TWJ-01 of the edge switch and the split switch TWJ-02 of the middle switch are connected in series to the receiving end of the line running state judgment unit, the switch state selection handle switch QK-1 is connected in parallel with the split switch TWJ-01 of the edge switch, and the switch state selection handle switch QK-2 is connected in parallel with the split switch TWJ-02 of the middle switch. Taking the A line as an example, when the edge switch 5011 and the middle switch 5012 are normally running, the edge switch 5011 and the middle switch 5012 are in the closed position, and the switch state selection handle switch QK-1 and the switch state selection handle switch QK-2 are both disconnected; when the edge switch 5011 is under maintenance, the switch state selection handle switch QK-1 is turned on, and the running state of the line only needs to rely on the switch state of the middle switch 5012; when the middle switch 5012 is under maintenance, the switch state selection handle switch QK-2 is turned on, and the running state of the line only needs to rely on the switch state of the edge switch 5011.

[0004] The running state monitoring circuit in the prior art judges the running state of the line according to the positions of the switch state selection handles QK-1 and QK-2, the position of the side switch and the position of the middle switch, wherein the positions of the switch state selection handles QK-1 and QK-2 need to be manually controlled by the staff, and when the side switch or the middle switch is under maintenance, if the switch state selection handles QK-1 and QK-2 are not switched to the corresponding switch maintenance positions in time, the running staff cannot find the problem of the positions not corresponding in time in the background, the line state judgment is not accurate, the protection device of the line is affected, the amount of accident handling of the running staff is increased, and safety accidents are easily caused, and the equipment is damaged. SUMMARY

[0005] The application provides a running state monitoring circuit of a two-thirds connection line, so as to realize automatic monitoring of the running state monitoring circuit, avoid the problem that the switch state selection handles QK1 and QK2 are not switched in time, and improve the accuracy of line state judgment.

[0006] According to an aspect of the application, a running state monitoring circuit of a two-thirds connection line is provided, comprising: a first switch, a second switch, a line running state judgment unit, a side switch open / close position monitoring loop, a first switch controller, a middle switch open / close position monitoring loop, and a second switch controller.

[0007] The first switch, the second switch and the line running state judgment unit are connected in series; the side switch open / close position monitoring loop and the first switch controller are connected in series at the positive and negative terminals of the main power supply of the running state monitoring circuit; and the middle switch open / close position monitoring loop and the second switch controller are connected in series at the positive and negative terminals of the main power supply.

[0008] The side switch open / close position monitoring loop is used for monitoring the switch state of the side switch of the two-thirds connection line and outputting a first state signal to the first switch controller; the middle switch open / close position monitoring loop is used for monitoring the switch state of the middle switch of the two-thirds connection line and outputting a second state signal to the second switch controller; and the switch state includes an open state and a closed state.

[0009] The first switch controller is used for controlling the first switch according to the first state signal, so that the first switch is turned on when the side switch is in the open state and is turned off when the side switch is in the closed state; and the second switch controller is used for controlling the second switch according to the second state signal, so that the second switch is turned on when the middle switch is in the open state and is turned off when the middle switch is in the closed state.

[0010] Optionally, the first switch controller comprises a first double position relay; the first switch is an auxiliary contact of the first double position relay; the second switch controller comprises a second double position relay; the second switch is an auxiliary contact of the second double position relay.

[0011] The side switch split / close bit monitoring circuit comprises a side switch split bit output end and a side switch close bit output end; the side switch split bit output end is electrically connected with the first input end of the first double position relay; the side switch close bit output end is electrically connected with the second input end of the first double position relay.

[0012] The middle switch split / close bit monitoring circuit comprises a middle switch split bit output end and a middle switch close bit output end; the middle switch split bit output end is electrically connected with the first input end of the second double position relay; the middle switch close bit output end is electrically connected with the second input end of the second double position relay.

[0013] Optionally, the first switch is a normally open auxiliary contact of the first double position relay; the second switch is a normally open auxiliary contact of the second double position relay.

[0014] Optionally, the side switch split / close bit monitoring circuit comprises a first split bit switch and a first close bit switch; one end of the first split bit switch is electrically connected with the positive end of the main power supply, and the other end is electrically connected with the first input end of the first double position relay; one end of the first close bit switch is electrically connected with the positive end of the main power supply, and the other end is electrically connected with the second input end of the first double position relay.

[0015] The middle switch split / close bit monitoring circuit comprises a second split bit switch and a second close bit switch; one end of the second split bit switch is electrically connected with the positive end of the main power supply, and the other end is electrically connected with the first input end of the second double position relay; one end of the second close bit switch is electrically connected with the positive end of the main power supply, and the other end is electrically connected with the second input end of the second double position relay.

[0016] The first split bit switch is turned on or turned off when the side switch is in the split state; the first close bit switch is turned on or turned off when the side switch is in the close state; the first split bit switch and the first close bit switch are not turned on at the same time.

[0017] The second split bit switch is turned on or turned off when the middle switch is in the split state; the second close bit switch is turned on or turned off when the middle switch is in the close state; the second split bit switch and the second close bit switch are not turned on at the same time.

[0018] Optionally, it further comprises a first set bit switch, a first reset bit switch, a second set bit switch and a second reset bit switch.

[0019] One end of the first set switch is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the first input terminal of the first double-position relay; one end of the first reset switch is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the second input terminal of the first double-position relay;

[0020] One end of the second set switch is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the first input terminal of the second double-position relay; one end of the second reset switch is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the second input terminal of the second double-position relay.

[0021] Optionally, the first set switch, the first reset switch, the second set switch and the second reset switch are all manual switches.

[0022] Optionally, it further comprises a first switch monitoring circuit, an edge switch monitoring circuit, a second switch monitoring circuit, a middle switch monitoring circuit and a monitoring circuit failure judging unit.

[0023] The first switch monitoring circuit and the edge switch monitoring circuit are connected in series at the first receiving end of the monitoring circuit failure judging unit; the second switch monitoring circuit and the middle switch monitoring circuit are connected in series at the second receiving end of the monitoring circuit failure judging unit.

[0024] The first switch monitoring circuit is used for monitoring the conduction state of the first switch; the edge switch monitoring circuit is used for monitoring the switching state of the edge switch; the second switch monitoring circuit is used for monitoring the conduction state of the second switch; and the middle switch monitoring circuit is used for monitoring the switching state of the middle switch.

[0025] The monitoring circuit failure judging unit is used for judging that the line running state judging unit is failed when the first switch is off and the edge switch is in the open state; or judging that the line running state judging unit is failed when the first switch is on and the edge switch is in the closed state; or judging that the line running state judging unit is failed when the second switch is off and the middle switch is in the open state; or judging that the line running state judging unit is failed when the second switch is on and the middle switch is in the closed state.

[0026] Optionally, the first switch monitoring circuit comprises a third switch and a fifth switch; the side switch monitoring circuit comprises a third on-position switch and a third off-position switch; the third switch and the third on-position switch are connected in series to the first receiving end of the monitoring circuit failure judging unit; the fifth switch and the third off-position switch are also connected in series to the first receiving end of the monitoring circuit failure judging unit;

[0027] The second switch monitoring circuit comprises a fourth switch and a sixth switch; the side switch monitoring circuit comprises a fourth on-position switch and a fourth off-position switch; the fourth switch and the fourth on-position switch are connected in series to the second receiving end of the monitoring circuit failure judging unit; the sixth switch and the fourth off-position switch are also connected in series to the second receiving end of the monitoring circuit failure judging unit;

[0028] The first switch controller is further configured to control the third switch and the fifth switch according to the first state signal, and the second switch controller is further configured to control the fourth switch and the sixth switch according to the second state signal.

[0029] When the first switch is off and the side switch is in the off-position state, the third switch and the third on-position switch are both on, or the fifth switch and the third off-position switch are both on; when the first switch is on and the side switch is in the on-position state, the fifth switch and the third off-position switch are both on, or the third switch and the third on-position switch are both on.

[0030] When the second switch is off and the middle switch is in the off-position state, the fourth switch and the fourth on-position switch are both on, or the sixth switch and the fourth off-position switch are both on; when the second switch is on and the middle switch is in the on-position state, the sixth switch and the fourth off-position switch are both on, or the fourth switch and the fourth on-position switch are both on.

[0031] Optionally, the device further comprises a first indicator light and a second indicator light.

[0032] The first switch monitoring circuit and the side switch monitoring circuit are connected in series to the first receiving end of the monitoring circuit failure judging unit through the first indicator light; the second switch monitoring circuit and the middle switch monitoring circuit are connected in series to the second receiving end of the monitoring circuit failure judging unit through the second indicator light.

[0033] Optionally, the device further comprises a display.

[0034] The display is electrically connected or communicatively connected to the line operation state judging unit.

[0035] The display is used for displaying the running state of the two-thirds wiring line.

[0036] The technical scheme of the present application, by the first switch and the second switch, replaces the original edge switch split switch and switch state selection handle in parallel, and the connection mode of the middle switch split switch and the switch state selection handle in parallel, through the edge switch split / close position monitoring circuit and the middle switch split / close position monitoring circuit, the switch state of the edge switch and the switch state of the middle switch can be monitored in real time, the first switch and the second switch are controlled by the first switch controller and the second controller, so that when the edge switch is overhauled, the first switch is turned on, and the line state can be judged only by the switch state of the middle switch, when the middle switch is overhauled, the second switch is turned on, and the line state can be judged only by the switch state of the variable switch, through the running state monitoring circuit provided by the technical scheme of the present application, the on state of the first switch and the on state of the second switch can be automatically switched according to the switch state of the middle switch and the switch state of the edge switch, the automatic monitoring of the line running state is realized, the problem that the line running state cannot be identified or identified inaccurately due to the failure to switch the switch state selection handle in time when the switch is overhauled is solved, the accuracy of the line state judgment is improved, and the normal operation of the running state monitoring circuit is ensured.

[0037] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating laborious work.

[0039] Figure 1 is a simplified schematic diagram of a two-thirds wiring primary wiring in the prior art;

[0040] Figure 2 is a simplified schematic diagram of a running state monitoring circuit in the prior art,

[0041] Figure 3 is a structure schematic diagram of a running state monitoring circuit of a two-thirds wiring line provided by the embodiment of the present application;

[0042] Figure 4 is a structure schematic diagram of a running state monitoring circuit of a two-thirds wiring line provided by the embodiment of the present application;

[0043] Figure 5 is a structure diagram of a running state monitoring circuit of a two-thirds wiring line provided by an embodiment of the present application. DETAILED DESCRIPTION

[0044] In order to make the personnel in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should belong to the scope of protection of the present application.

[0045] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] Figure 3 is a structure diagram of a running state monitoring circuit of a two-thirds wiring line provided by an embodiment of the present application. Figure 3 The running state monitoring circuit 10 includes a first switch STJ-1, a second switch STJ-2, a line running state judgment unit 20, an edge switch on / off position monitoring circuit 30, a first switch controller 40, a middle switch on / off position monitoring circuit 50 and a second switch controller 60; the first switch STJ-1, the second switch STJ-2 and the line running state judgment unit 20 are connected in series; the edge switch on / off position monitoring circuit 30 and the first switch controller 40, and the middle switch on / off position monitoring circuit 50 and the second switch controller 60 are respectively connected in series to the positive and negative terminals of the main power supply of the running state monitoring circuit 10.

[0047] The edge switch open / close state monitoring circuit 30 is configured to monitor the open / close state of the edge switch of the two-third connection line and output a first state signal to the first switch controller 40; the middle switch open / close state monitoring circuit 50 is configured to monitor the open / close state of the middle switch of the two-third connection line and output a second state signal to the second switch controller 60; wherein the open / close state includes an open state and a closed state. The first switch controller 40 is configured to control the first switch STJ-1 according to the first state signal, so that the first switch STJ-1 is turned on when the edge switch is in the open state, and is turned off when the edge switch is in the closed state; the second switch controller 60 is configured to control the second switch STJ-2 according to the second state signal, so that the second switch STJ-2 is turned on when the middle switch is in the open state, and is turned off when the middle switch is in the closed state.

[0048] For example, when the edge switch is under maintenance, the edge switch is in the open state, the edge switch open / close state monitoring circuit 30 outputs the first state signal that the edge switch is in the open state, the first switch controller 40 controls the first switch STJ-1 to be turned on after receiving the first state signal that the edge switch is in the open state, and the line running state is determined by the open / close state of the middle switch; when the middle switch is in the closed state, the middle switch open / close state monitoring circuit 50 outputs the second state signal that the middle switch is in the closed state, the second switch controller 60 controls the second switch STJ-2 to be turned off after receiving the second state signal that the middle switch is in the closed state, the receiving end 21 connected in series with the first switch STJ-1 and the second switch STJ-2 in the line running state judgment unit 20 does not receive the electrical signal, and the line running state judgment unit 20 determines that the line is in the running state; when the middle switch is in the open state, the middle switch open / close state monitoring circuit 50 outputs the second state signal that the middle switch is in the open state, the second switch controller 60 controls the second switch STJ-2 to be turned on after receiving the second state signal that the middle switch is in the open state, the receiving end 21 connected in series with the first switch STJ-1 and the second switch STJ-2 in the line running state judgment unit 20 can receive the electrical signal, and the line running state judgment unit 20 determines that the line is in the shutdown state.

[0049] Similarly, when the middle switch is in the open state during maintenance, the middle switch is in the open state, and the middle switch on / off position monitoring circuit 50 outputs a second state signal indicating that the side switch is in the open state. After receiving the second state signal indicating that the middle switch is in the open state, the second switch controller 60 controls the second switch STJ-2 to be turned on, and the line operation state is determined by the switch state of the side switch; when the side switch is in the closed state, the side switch on / off position monitoring circuit 30 outputs a first state signal indicating that the side switch is in the closed state, and the first switch controller 40 controls the first switch STJ-1 to be turned off after receiving the first state signal indicating that the side switch is in the closed state. The receiving end 21 does not receive the electric signal, and the line operation state judgment unit 20 can determine that the line is in the running state; when the side switch is in the open state, the side switch on / off position monitoring circuit 30 outputs a first state signal indicating that the side switch is in the open state, and the first switch controller 40 controls the first switch STJ-1 to be turned on after receiving the first state signal indicating that the side switch is in the open state. The receiving end 21 can receive the electric signal, and the line operation state judgment unit 20 can determine that the line is in the shutdown state.

[0050] In an optional embodiment, the operation state monitoring circuit 10 further comprises a protection power supply 120 connected in series to the positive and negative terminals of the main power supply, and the protection power supply 120 is electrically connected to the line operation state judgment unit 20. The protection power supply 120 is used to supply power to the line operation state judgment unit 20, so that when the receiving end 21 in series with the first switch STJ-1 and the second switch STJ-2 in the line operation state judgment unit 20 does not receive the electric signal, the line operation state judgment unit 20 can still determine the line operation state and output the related message.

[0051] In an optional embodiment, the operation state monitoring circuit 10 further comprises a total switch 1K, which can control the on / off of the main power supply and can control the operation of the operation state monitoring circuit 10.

[0052] The embodiment of the present application replaces the original edge switch sub-position switch and the parallel connection of the switch state selection handle, and the parallel connection of the middle switch sub-position switch and the switch state selection handle, and can monitor the switch state of the edge switch and the switch state of the middle switch in real time through the edge switch on / off position monitoring circuit and the middle switch on / off position monitoring circuit, and controls the first switch and the second switch through the first switch controller and the second controller, so that when the edge switch is maintained, the first switch is turned on, and the line state can be determined only through the switch state of the middle switch, when the middle switch is maintained, the second switch is turned on, and the line state can be determined only through the switch state of the variable switch, and the running state monitoring circuit provided by the embodiment of the present application can automatically switch the on state of the first switch and the on state of the second switch according to the switch state of the middle switch and the switch state of the edge switch, realizes the automatic monitoring of the line running state, solves the problem that the line running state cannot be identified or is not accurately identified due to the failure to timely switch the switch state selection handle when the switch is maintained, improves the accuracy of the line state determination, and ensures the normal operation of the running state monitoring circuit.

[0053] Optionally, Figure 4 is another structure schematic diagram of the running state monitoring circuit of the two-thirds wiring line provided by the embodiment of the present application, referring to Figure 4 The first switch controller 40 includes a first double-position relay STJ1, the first switch STJ-1 is an auxiliary contact of the first double-position relay STJ1, the second switch controller 60 includes a second double-position relay STJ2, the second switch STJ-2 is an auxiliary contact of the second double-position relay STJ1, the edge switch on / off position monitoring circuit 30 includes an edge switch on-position output end 31 and an edge switch off-position output end 32, the edge switch on-position output end 31 is electrically connected with a first input end 1-1 of the first double-position relay STJ1, and the edge switch off-position output end 32 is electrically connected with a second input end 1-2 of the first double-position relay STJ1, the middle switch on / off position monitoring circuit 50 includes a middle switch on-position output end 51 and a middle switch off-position output end 52, the middle switch on-position output end 51 is electrically connected with a first input end 2-1 of the second double-position relay STJ2, and the middle switch off-position output end 52 is electrically connected with a second input end 2-2 of the second double-position relay STJ2.

[0054] For example, when the side switch split bit output end 31 outputs an electrical signal, it represents that the side switch is in the split state, the side switch joint bit output end 32 does not output an electrical signal, the first input end 1-1 of the first double position relay STJ1 receives an electrical signal, the first double position relay STJ1 is set, at this time, the first switch STJ-1 is turned on; when the side switch joint bit output end 32 outputs an electrical signal, it represents that the side switch is in the joint state, the side switch split bit output end 31 does not output an electrical signal, the second input end 1-2 of the first double position relay STJ1 receives an electrical signal, the first double position relay STJ1 is reset, at this time, the first switch STJ-1 is turned off. When the middle switch split bit output end 51 outputs an electrical signal, it represents that the middle switch is in the split state, the middle switch joint bit output end 52 does not output an electrical signal, the first input end 2-1 of the second double position relay STJ1 receives an electrical signal, the second double position relay STJ2 is set, at this time, the second switch STJ-2 is turned on; when the middle switch joint bit output end 52 outputs an electrical signal, it represents that the middle switch is in the joint state, the middle switch split bit output end 51 does not output an electrical signal, the second input end 2-2 of the second double position relay STJ2 receives an electrical signal, the second double position relay STJ2 is reset, at this time, the second switch STJ-2 is turned off. Among them, the first switch STJ-1 is the normally open auxiliary contact of the first double position relay STJ1; the second switch STJ-2 is the normally open auxiliary contact of the second double position relay STJ2.

[0055] If the side switch split / joint bit monitoring circuit 30 is powered off due to failure or human error, resulting in the side switch split bit output end 31 and the side switch joint bit output end 32 not outputting an electrical signal, the first double position relay STJ1 still maintains the original set or reset state, without affecting the conduction state of the first switch STJ-1; if the middle switch split / joint bit monitoring circuit 50 is powered off due to failure or human error, resulting in the middle switch split bit output end 51 and the middle switch joint bit output end 52 not outputting an electrical signal, the second double position relay STJ2 still maintains the original set or reset state, without affecting the conduction state of the first switch STJ-2. In this way, even if the side switch split / joint bit monitoring circuit 30 or the middle switch split / joint bit monitoring circuit 50 is powered off or has internal failure, it does not affect the identification of the line operating state by the operating state monitoring circuit 10.

[0056] It can be understood that when the side switch split bit output end 31 outputs an electrical signal, it can also represent that the side switch is in the closed state, the side switch closed bit output end 32 does not output an electrical signal, the first input end 1-1 of the first double position relay STJ1 receives an electrical signal, and the first double position relay STJ1 is reset at this time, and the first switch STJ-1 is disconnected; on the contrary, the first double position relay STJ1 is set, and at this time, the first switch STJ-1 is turned on. When the middle switch split bit output end 51 outputs an electrical signal, it can also represent that the middle switch is in the closed state, the middle switch closed bit output end 52 does not output an electrical signal, the first input end 2-1 of the second double position relay STJ2 receives an electrical signal, and the second double position relay STJ2 is reset at this time, and the second switch STJ-2 is disconnected; on the contrary, the second double position relay STJ2 is set, and at this time, the second switch STJ-2 is turned on.

[0057] Optionally, with reference to Figure 4 , the operating state monitoring circuit 10 further comprises a first control power supply 130 and a second control power supply 150, which are respectively connected in series to the positive and negative terminals of the main power supply. The side switch split / closed bit monitoring circuit 30 comprises a first closed control circuit 301, a first split bit relay TWJ1, a first split bit switch TWJ-1, a first split control circuit 302, a first closed bit relay HWJ1, and a first closed bit switch HWJ-1; the first closed control circuit 301 and the first split bit relay TWJ1, and the first split control circuit 302 and the first closed bit relay HWJ1 are respectively connected in series to the positive and negative terminals of the first control power supply 130; the first control switch 4K1 can control the on / off of the first control power supply 130, and can control the working or non-working of the side switch split / closed bit monitoring circuit 30; the first split bit relay TWJ1 is used to control the on state of the first split bit switch TWJ-1, and the first closed bit relay HWJ1 is used to control the on state of the first closed bit switch HWJ-1. The middle switch split / closed bit monitoring circuit 50 comprises a second closed control circuit 501, a second split bit relay TWJ2, a second split bit switch TWJ-2, a second split control circuit 502, a second closed bit relay HWJ2, and a second closed bit switch HWJ-2; the second closed control circuit 501 and the second split bit relay TWJ2, and the second split control circuit 502 and the second closed bit relay HWJ2 are respectively connected in series to the positive and negative terminals of the second control power supply 150; the second control switch 4K2 can control the on / off of the second control power supply 150, and can control the working or non-working of the middle switch split / closed bit monitoring circuit 50; the second split bit relay TWJ1 is used to control the on state of the second split bit switch TWJ-2, and the second closed bit relay HWJ2 is used to control the on state of the second closed bit switch HWJ-2.

[0058] With reference to Figure 4, one end of the first split switch TWJ-1 is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the first input end 1-1 of the first double-position relay STJ1; one end of the first close switch HWJ-1 is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the second input end 1-2 of the first double-position relay STJ1; one end of the second split switch TWJ-2 is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the first input end 2-1 of the second double-position relay STJ2; one end of the second close switch HWJ-2 is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the second input end 2-2 of the second double-position relay STJ2.

[0059] For example, the first split switch TWJ-1, the first close switch HWJ-1, the second split switch TWJ-2 and the second close switch HWJ-2 are all normally open auxiliary contacts. When the side switch is in the open state, the first close control circuit 301 and the first split relay TWJ1 are energized, the first split switch TWJ-1 is turned on, the first split control circuit 302 and the first close relay HWJ1 are not energized, and the first close switch HWJ-1 is turned off; when the side switch is in the closed state, the first close control circuit 301 and the first split relay TWJ1 are not energized, the first split switch TWJ-1 is turned off, the first split control circuit 302 and the first close relay HWJ1 are energized, and the first close switch HWJ-1 is turned on. Similarly, when the middle switch is in the open state, the second close control circuit 501 and the second split relay TWJ2 are energized, the second split switch TWJ-2 is turned on, the second split control circuit 502 and the second close relay HWJ2 are not energized, and the second close switch HWJ-2 is turned off; when the middle switch is in the closed state, the second close control circuit 501 and the second split relay TWJ2 are not energized, the second split switch TWJ-2 is turned off, the second split control circuit 502 and the second close relay HWJ2 are energized, and the second close switch HWJ-2 is turned on.

[0060] It can be understood that the first split switch TWJ-1, the first close switch HWJ-1, the second split switch TWJ-2 and the second close switch HWJ-2 can also be normally closed auxiliary contacts. When the side switch is in the open state, the first split switch TWJ-1 is turned off, and the first close switch HWJ-1 is turned on; when the side switch is in the closed state, the first split switch TWJ-1 is turned on, and the first close switch HWJ-1 is turned off. When the middle switch is in the open state, the second split switch TWJ-2 is turned off, and the second close switch HWJ-2 is turned on; when the middle switch is in the closed state, the second split switch TWJ-2 is turned on, and the second close switch HWJ-2 is turned off.

[0061] Optionally, continuing to refer to Figure 4The running state monitoring circuit 10 further comprises a first setting switch S1, a first resetting switch S2, a second setting switch S3 and a second resetting switch S4. One end of the first setting switch S1 is electrically connected to the positive terminal of the main power supply, and the other end is electrically connected to the first input end 1-1 of the first double-position relay STJ1. One end of the first resetting switch S2 is electrically connected to the positive terminal of the main power supply, and the other end is electrically connected to the second input end 1-2 of the first double-position relay STJ1. One end of the second setting switch S3 is electrically connected to the positive terminal of the main power supply, and the other end is electrically connected to the first input end 2-1 of the second double-position relay STJ2. One end of the second resetting switch S4 is electrically connected to the positive terminal of the main power supply, and the other end is electrically connected to the second input end 2-2 of the second double-position relay STJ. In this way, when the side switch on / off state monitoring circuit 30 and / or the middle switch on / off state monitoring circuit 50 fails, the first setting switch S1, the first resetting switch S2, the second setting switch S3 and the second resetting switch S4 can forcibly set or reset the first double-position relay STJ1 and / or the second double-position relay STJ2, so that the first switch STJ-1 and STJ-2 correspond to the switch state of the side switch and the switch state of the middle switch, and the running state monitoring circuit 10 can identify the line running state.

[0062] In an optional embodiment, the first setting switch, the first resetting switch, the second setting switch and the second resetting switch are all manual switches, such as button switches, handle switches, etc., or the first setting switch and the first resetting switch can be a first three-position handle switch, and the second setting switch and the second resetting switch can be a second three-position handle switch. The staff can manually control the state of the first double-position relay STJ1 and the second double-position relay STJ2 according to the actual situation to cope with unexpected situations.

[0063] Optionally, Figure 5 is another structure schematic diagram of a running state monitoring circuit of a two-thirds wiring line provided by an embodiment of the present application, which refers to Figure 5 The running state monitoring circuit 10 further comprises a first switch monitoring circuit 71, a side switch monitoring circuit 72, a second switch monitoring circuit 81, a middle switch monitoring circuit 82 and a monitoring circuit failure judgment unit 90. The first switch monitoring circuit 71 and the side switch monitoring circuit 72 are connected in series to the first receiving end 91 of the monitoring circuit failure judgment unit 90. The second switch monitoring circuit 81 and the middle switch monitoring circuit 82 are connected in series to the second receiving end 92 of the monitoring circuit failure judgment unit 90.

[0064] The first switch detection circuit 71 is used for monitoring the on state of the first switch STJ-1; the side switch monitoring circuit 72 is used for monitoring the on state of the side switch; the second switch detection circuit 81 is used for monitoring the on state of the second switch STJ-2; the center switch monitoring circuit 82 is used for monitoring the on state of the center switch. The monitoring circuit failure judging unit 90 is used for judging that the line running state judging unit 20 is failed when the first switch STJ-1 is off and the side switch is in the open state; or the first switch STJ-1 is on and the side switch is in the closed state; or the second switch STJ-2 is off and the center switch is in the open state; or the second switch STJ-2 is on and the center switch is in the closed state.

[0065] For example, when the first switch STJ-1 is off, it should indicate that the side switch is in the closed state, but the side switch monitoring circuit 72 detects that the side switch is in the open state, which indicates that the on state of the first switch STJ-1 is inconsistent with the actual on state of the side switch; when the first switch STJ-1 is on, it should indicate that the side switch is in the open state, but the side switch monitoring circuit 72 detects that the side switch is in the closed state, which also indicates that the on state of the first switch STJ-1 is inconsistent with the actual on state of the side switch; in these two cases, the first receiving end 91 can receive the electrical signal, and the monitoring circuit failure judging unit 90 can confirm that the on state of the first switch STJ-1 is inconsistent with the on state of the side switch, which will cause the line running state judging unit 20 to be inaccurate and failed, and the monitoring circuit failure judging unit 90 sends the message information of "the on state of the first switch STJ-1 is inconsistent with the on state of the side switch". When the second switch STJ-2 is off, it should indicate that the center switch is in the closed state, but the center switch monitoring circuit 82 detects that the center switch is in the open state, which indicates that the on state of the second switch STJ-2 is inconsistent with the actual on state of the center switch; when the second switch STJ-2 is on, it should indicate that the center switch is in the open state, but the center switch monitoring circuit 82 detects that the center switch is in the closed state, which also indicates that the on state of the second switch STJ-2 is inconsistent with the actual on state of the center switch; in these two cases, the second receiving end 92 can receive the electrical signal, and the monitoring circuit failure judging unit 90 can confirm that the on state of the second switch STJ-2 is inconsistent with the on state of the center switch, which will cause the line running state judging unit 20 to be inaccurate and failed, and the monitoring circuit failure judging unit 90 sends the message information of "the on state of the second switch STJ-2 is inconsistent with the on state of the center switch".

[0066] In an optional embodiment, the protection power supply 120 is also electrically connected with the monitoring circuit failure judging unit 90, and the protection power supply 120 is also used for supplying power for the monitoring circuit failure judging unit 90, so that when the first receiving end 91 and / or the second receiving end 92 of the monitoring circuit failure judging unit 90 does not receive the electrical signal, the monitoring circuit failure judging unit 90 can still work, and the correspondence between the conduction state of the first switch STJ-1 and the switch state of the side switch and the correspondence between the conduction state of the second switch STJ-2 and the switch state of the middle switch are confirmed.

[0067] Optionally, with reference to Figure 5 , the running state monitoring circuit 10 further comprises a first indicator lamp WBY1 and a second indicator lamp WBY2; the first switch monitoring circuit 71 and the side switch monitoring circuit 72 are connected in series with the first receiving end 91 of the monitoring circuit failure judging unit 90 through the first indicator lamp WBY1; the second switch monitoring circuit 81 and the middle switch monitoring circuit 82 are connected in series with the second receiving end 92 of the monitoring circuit failure judging unit 90 through the second indicator lamp WBY2. In this way, when the conduction state of the first switch STJ-1 does not correspond to the switch state of the side switch, the first indicator lamp WBY1 is lighted to remind the staff; when the conduction state of the second switch STJ-2 does not correspond to the switch state of the middle switch, the second indicator lamp WBY2 is lighted to remind the staff.

[0068] It can be understood that the first indicator lamp WBY1 and the second indicator lamp WBY2 can be replaced or connected in series with other alarms such as a buzzer, and various forms are used to remind the staff.

[0069] Optionally, the running state monitoring circuit further comprises a display (not shown in the figure), and the display is electrically connected or communicatively connected with the line running state judging unit; the display is used for displaying the running state of the two-thirds connection line.

[0070] Illustratively, the display can receive the message information of the line running state judging unit to obtain the running state of the two-thirds connection line, and can also receive the message information of the monitoring circuit failure judging unit to issue a display alarm to remind the staff that the conduction state of the first switch STJ-1 does not correspond to the switch state of the side switch and / or the conduction state of the second switch STJ-2 does not correspond to the switch state of the middle switch, so that the staff can know the accurate running state.

[0071] Optionally, with reference to Figure 5The first switch monitoring circuit 71 comprises a third switch STJ-3 and a fifth switch STJ-5; the side switch monitoring circuit 72 comprises a third make switch HWJ-3 and a third break switch TWJ-3; the third switch STJ-3 and the third make switch HWJ-3 are connected in series to the first receiving end 91 of the monitoring circuit failure judging unit 90; the fifth switch STJ-5 and the third break switch TWJ-3 are also connected in series to the first receiving end 91 of the monitoring circuit failure judging unit 90. The second switch monitoring circuit 81 comprises a fourth switch STJ-4 and a sixth switch STJ-6; the side switch monitoring circuit 82 comprises a fourth make switch HWJ-4 and a fourth break switch TWJ-4; the fourth switch STJ-4 and the fourth make switch HWJ-4 are connected in series to the second receiving end 92 of the monitoring circuit failure judging unit 90; the sixth switch STJ-6 and the fourth break switch TWJ-4 are also connected in series to the second receiving end 92 of the monitoring circuit failure judging unit 90. The first switch controller 40 is further configured to control the third switch STJ-3 and the fifth switch STJ-5 according to the first state signal; the second switch controller 60 is further configured to control the fourth switch STJ-4 and the sixth switch STJ-6 according to the second state signal.

[0072] For example, the third switch STJ-3 is a normally closed auxiliary contact of the first double position relay STJ1, the fifth switch STJ-5 is a normally open auxiliary contact of the first double position relay STJ1; the third make switch HWJ-3 is a normally closed auxiliary contact of the first make relay HWJ1, the third break switch TWJ-3 is a normally closed auxiliary contact of the first break relay TWJ1; the third switch STJ-4 is a normally closed auxiliary contact of the second double position relay STJ2, the sixth switch STJ-6 is a normally open auxiliary contact of the second double position relay STJ2; the fourth make switch HWJ-4 is a normally closed auxiliary contact of the second make relay HWJ2, the fourth break switch TWJ-4 is a normally closed auxiliary contact of the second break relay TWJ2.

[0073] Reference Figure 5When the side switch is in normal operation, the side switch is in the closed state, the first closed position relay HWJ1 is energized, the first closed position switch HWJ-1 is turned on, the third closed position switch HWJ-3 is turned off, the first double position relay STJ1 is reset, the third switch STJ-3 is closed, the fifth switch STJ-5 is turned off, the first open position relay TWJ1 is de-energized, the third open position switch TWJ-3 is turned on, and the first receiving end 91 does not receive an electrical signal at this time; assuming that the first closed control circuit 301 is disconnected due to a fault, the first open control circuit 302 is normal, when the line protection is tripped or the side switch is manually opened, the side switch is in the open state, the first closed position relay HWJ1 is not energized, the third closed position switch HWJ-3 is turned on, and the first open position relay TWJ1 is not energized due to the disconnection of the first closed control circuit 301, the first open position switch TWJ-1 is turned off, the third open position switch TWJ-3 is turned on, the first double position relay STJ1 cannot be set, and remains in the reset state, the third switch STJ-3 is turned on, and the fifth switch STJ-5 is turned off, at this time the third switch STJ-3 and the third closed position switch HWJ-3 are both turned on, when the side switch changes from the running state to the maintenance state, the first double position relay STJ1 is not set, the maintenance state does not correspond, the running state monitoring circuit 10 issues an alarm that the "on state of the first switch STJ-1 does not correspond to the switch state of the side switch", and the indicator light WBY1 is lit, at this time the first double position relay STJ1 can be forcibly set by the first set switch S1 to correct the state of the first double position relay STJ1, and to find out the reason for the disconnection of the first closed control circuit 301.When the side switch is under maintenance, the side switch is in the open state, the first open relay TWJ1 is energized, the first open switch TWJ-1 is turned on, the third open switch TWJ-3 is turned off, the first double position relay STJ1 is set, the third switch STJ-3 is turned off, the fifth switch STJ-5 is turned on, the first close relay HWJ1 is de-energized, the third close switch HWJ-3 is turned on, and the first receiving end 91 does not receive an electrical signal; assuming that the first close control circuit 301 is normal and the first open control circuit 302 is broken, when the side switch is under maintenance, the side switch is in the closed state, the first open relay TWJ1 is not energized, the third open switch TWJ-3 is turned on, the first close relay HWJ1 is not energized due to the fault of the first open control circuit 302, the third close switch HWJ-3 is turned on, the first double position relay STJ1 cannot be reset and is still in the set state, the third switch STJ-3 is turned off, and the fifth switch STJ-5 is turned on; at this time, the fifth switch STJ-5 and the third open switch TWJ-3 are both turned on, the side switch is in the running state from the maintenance state, the first double position relay STJ1 is not reset, the maintenance state does not correspond, and the running state monitoring circuit 10 issues an alarm that the "on state of the first switch STJ-1 does not correspond to the switch state of the side switch", and the indicator light WBY1 is lit; at this time, the first double position relay STJ1 can be forcibly reset through the first reset switch S1, the state of the first double position relay STJ1 is corrected, and the reason for the fault of the first open control circuit 302 is found.

[0074] Similarly, when the middle switch is in normal operation, the middle switch is in the closed state, the second closing position relay HWJ2 is powered on, the second closing position switch HWJ-2 is turned on, the fourth closing position switch HWJ-4 is turned off, the second double position relay STJ2 is reset, the fourth switch STJ-4 is closed, the sixth switch STJ-6 is turned off, the second separating position relay TWJ2 is powered off, the fourth separating position switch TWJ-4 is turned on, and the second receiving end 92 does not receive an electrical signal at this time; assuming that the second closing control loop 501 is disconnected due to a fault, the second opening control loop 502 is normal, when the line protection acts to trip or the middle switch is manually opened, the middle switch is in the open state, the second closing position relay HWJ2 is not powered on, the fourth closing position switch HWJ-4 is turned on, and since the second closing control loop 501 is disconnected, the second separating position relay TWJ2 is not powered on, the second separating position switch TWJ-2 is turned off, the fourth separating position switch TWJ-4 is turned on, the second double position relay STJ2 cannot be set, and is still in the reset state, the fourth switch STJ-4 is turned on, and the sixth switch STJ-6 is turned off at this time, the fourth switch STJ-4 and the fourth closing position switch HWJ-4 are both turned on, when the middle switch changes from the running state to the maintenance state, the second double position relay STJ2 is not set, the maintenance state does not correspond, the running state monitoring circuit 10 issues an alarm that "the on state of the second switch STJ-2 does not correspond to the switch state of the middle switch", and the indicator light WBY2 is lit at this time, at this time, the second double position relay STJ2 can be forcibly set by the second setting switch S3 to correct the state of the second double position relay STJ2, and to find out the reason for the disconnection of the second closing control loop 501.When the middle switch is under maintenance, the middle switch is in the open state, the second open relay TWJ2 is energized, the second open switch TWJ-2 is turned on, the fourth open switch TWJ-4 is turned off, the second double-position relay STJ2 is set, the fourth switch STJ-4 is turned off, the sixth switch STJ-6 is turned on, the second close relay HWJ2 is de-energized, the fourth close switch HWJ-4 is turned on, and the second receiving end 92 does not receive an electrical signal at this time; assuming that the second close control circuit 501 is normal and the second open control circuit 502 is broken, when the middle switch is under maintenance, the middle switch is in the closed state, the second open relay TWJ2 is not energized, the fourth open switch TWJ-4 is turned on, and the second close relay HWJ2 is not energized due to the fault of the second open control circuit 502. The fourth close switch HWJ-4 is turned on, the second double-position relay STJ2 cannot be reset and is still in the set state, the fourth switch STJ-4 is turned off, and the sixth switch STJ-6 is turned on at this time. The sixth switch STJ-6 and the fourth open switch TWJ-4 are both turned on, and when the middle switch is in the maintenance state and the running state, the second double-position relay STJ2 is not reset, the maintenance state does not correspond, and the running state monitoring circuit 10 issues an alarm that the "on state of the second switch STJ-2 does not correspond to the switch state of the middle switch". The indicator light WBY2 is lit at this time. At this time, the second double-position relay STJ2 can be forcibly reset through the second reset switch S4 to correct the state of the second double-position relay STJ2 and find out the reason for the fault of the second open control circuit 502.

[0075] It can be understood that the third switch STJ-3 is a normally open auxiliary contact of the first double-position relay STJ1, and the fifth switch STJ-5 is a normally closed auxiliary contact of the first double-position relay STJ1; the third close switch HWJ-3 is a normally open auxiliary contact of the first close relay HWJ1, and the third open switch TWJ-3 is a normally closed auxiliary contact of the first open relay TWJ1; the third switch STJ-4 is a normally open auxiliary contact of the second double-position relay STJ2, and the sixth switch STJ-6 is a normally closed auxiliary contact of the second double-position relay STJ2; the fourth close switch HWJ-4 is a normally open auxiliary contact of the second close relay HWJ2, and the fourth open switch TWJ-4 is a normally open auxiliary contact of the second open relay TWJ2. The above process can also be realized, which will not be described here.

[0076] Note that the above merely describes preferred embodiments of the present application and the principles of the technology applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, modifications and substitutions can be made without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.

Claims

1. A running state monitoring circuit of a two-and-two-thirds wiring line for monitoring a running state of the two-and-two-thirds wiring line, characterized by, The operation state monitoring circuit comprises a first switch, a second switch, a line operation state judging unit, an edge switch on / off position monitoring circuit, a first switch controller, a middle switch on / off position monitoring circuit and a second switch controller. The first switch, the second switch and the line operation state judging unit are connected in series; the edge switch on / off position monitoring circuit and the first switch controller are connected in series at the positive and negative terminals of a main power supply of the operation state monitoring circuit; the middle switch on / off position monitoring circuit and the second switch controller are connected in series at the positive and negative terminals of the main power supply. The edge switch on / off position monitoring circuit is used for monitoring the switch state of the edge switch of the two-thirds connection line and outputting a first state signal to the first switch controller; the middle switch on / off position monitoring circuit is used for monitoring the switch state of the middle switch of the two-thirds connection line and outputting a second state signal to the second switch controller; wherein the switch state comprises an open state and a closed state. The first switch controller is used for controlling the first switch according to the first state signal, so that the first switch is turned on when the edge switch is in the open state and is turned off when the edge switch is in the closed state; the second switch controller is used for controlling the second switch according to the second state signal, so that the second switch is turned on when the middle switch is in the open state and is turned off when the middle switch is in the closed state. The first switch controller comprises a first double-position relay; the first switch is an auxiliary contact of the first double-position relay; the second switch controller comprises a second double-position relay; the second switch is an auxiliary contact of the second double-position relay. The edge switch on / off position monitoring circuit comprises an edge switch open position output terminal and an edge switch closed position output terminal; the edge switch open position output terminal is electrically connected with a first input terminal of the first double-position relay; the edge switch closed position output terminal is electrically connected with a second input terminal of the first double-position relay. The middle switch on / off position monitoring circuit comprises a middle switch open position output terminal and a middle switch closed position output terminal; the middle switch open position output terminal is electrically connected with a first input terminal of the second double-position relay; the middle switch closed position output terminal is electrically connected with a second input terminal of the second double-position relay.

2. The operating state monitoring circuit for a two-thirds wiring line according to claim 1, characterized by, The first switch is a normally open auxiliary contact of the first double-position relay; the second switch is a normally open auxiliary contact of the second double-position relay.

3. The operating state monitoring circuit for a two-thirds wiring line according to Claim 1, characterized by, The edge switch on / off position monitoring circuit comprises a first open position switch and a first closed position switch; one end of the first open position switch is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the first input terminal of the first double-position relay; one end of the first closed position switch is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the second input terminal of the first double-position relay. The middle switch on-off state monitoring circuit comprises a second split switch and a second closing switch; one end of the second split switch is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the first input terminal of the second double-position relay; one end of the second closing switch is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the second input terminal of the second double-position relay; The first split switch is turned on or turned off when the side switch is in the split state; the first closing switch is turned on or turned off when the side switch is in the closing state; the first split switch and the first closing switch are not turned on at the same time; The second split switch is turned on or turned off when the middle switch is in the split state; the second closing switch is turned on or turned off when the middle switch is in the closing state; the second split switch and the second closing switch are not turned on at the same time.

4. The operating state monitoring circuit for a two-thirds wiring line according to Claim 1, characterized by Further comprising: a first set switch, a first reset switch, a second set switch and a second reset switch; one end of the first set switch is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the first input terminal of the first double-position relay; one end of the first reset switch is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the second input terminal of the first double-position relay; one end of the second set switch is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the first input terminal of the second double-position relay; one end of the second reset switch is electrically connected with the positive terminal of the main power supply, and the other end is electrically connected with the second input terminal of the second double-position relay.

5. The operating state monitoring circuit for a two-thirds wiring line according to claim 4, characterized by, The first set switch, the first reset switch, the second set switch and the second reset switch are all manual switches.

6. The operating state monitoring circuit for a two-thirds wiring line according to Claim 1, characterized by Further comprising: a first switch monitoring circuit, a side switch monitoring circuit, a second switch monitoring circuit, a middle switch monitoring circuit and a monitoring circuit failure judgment unit; the first switch monitoring circuit and the side switch monitoring circuit are connected in series at the first receiving end of the monitoring circuit failure judgment unit; the second switch monitoring circuit and the middle switch monitoring circuit are connected in series at the second receiving end of the monitoring circuit failure judgment unit; the first switch detection circuit is used for monitoring the conduction state of the first switch; the side switch monitoring circuit is used for monitoring the switch state of the side switch; the second switch detection circuit is used for monitoring the conduction state of the second switch; the middle switch monitoring circuit is used for monitoring the switch state of the middle switch; the monitoring circuit failure judgment unit is used for judging that the line running state judgment unit fails when the first switch is turned off and the side switch is in the split state; or, judging that the line running state judgment unit fails when the first switch is turned on and the side switch is in the closing state; or, judging that the line running state judgment unit fails when the second switch is turned off and the middle switch is in the split state; or, judging that the line running state judgment unit fails when the second switch is turned on and the middle switch is in the closing state.

7. The operating state monitoring circuit for a two-thirds wiring line according to claim 6, characterized by The first switch monitoring circuit comprises a third switch and a fifth switch; the side switch monitoring circuit comprises a third on-position switch and a third off-position switch; the third switch and the third on-position switch are connected in series to a first receiving end of the monitoring circuit failure judging unit; the fifth switch and the third off-position switch are also connected in series to the first receiving end of the monitoring circuit failure judging unit; The second switch monitoring circuit comprises a fourth switch and a sixth switch; the side switch monitoring circuit comprises a fourth on-position switch and a fourth off-position switch; the fourth switch and the fourth on-position switch are connected in series to a second receiving end of the monitoring circuit failure judging unit; the sixth switch and the fourth off-position switch are also connected in series to the second receiving end of the monitoring circuit failure judging unit; The first switch controller is further configured to control the third switch and the fifth switch according to the first state signal, and the second switch controller is further configured to control the fourth switch and the sixth switch according to the second state signal; When the first switch is off and the side switch is in the off-position state, the third switch and the third on-position switch are both on, or the fifth switch and the third off-position switch are both on; when the first switch is on and the side switch is in the on-position state, the fifth switch and the third off-position switch are both on, or the third switch and the third on-position switch are both on; When the second switch is off and the middle switch is in the off-position state, the fourth switch and the fourth on-position switch are both on, or the sixth switch and the fourth off-position switch are both on; when the second switch is on and the middle switch is in the on-position state, the sixth switch and the fourth off-position switch are both on, or the fourth switch and the fourth on-position switch are both on.

8. The operating state monitoring circuit for a two-thirds wiring line according to claim 6, characterized by Further comprising: a first indicator light and a second indicator light; The first switch monitoring circuit and the side switch monitoring circuit are connected in series to the first receiving end of the monitoring circuit failure judging unit through the first indicator light; the second switch monitoring circuit and the middle switch monitoring circuit are connected in series to the second receiving end of the monitoring circuit failure judging unit through the second indicator light.

9. The operating state monitoring circuit for a two-thirds wiring line according to Claim 1, characterized by Further comprising: a display: The display is electrically connected or communicatively connected to the line operation state judging unit; The display is configured to display the operation state of the two-thirds connection line.

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