CN211032596U - Switch control interface circuit - Google Patents
Switch control interface circuit Download PDFInfo
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- CN211032596U CN211032596U CN201921598842.6U CN201921598842U CN211032596U CN 211032596 U CN211032596 U CN 211032596U CN 201921598842 U CN201921598842 U CN 201921598842U CN 211032596 U CN211032596 U CN 211032596U
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Abstract
The utility model provides a switch control interface circuit, including the excitation circuit of cutting off the relay and the self preservation circuit of cutting off the relay, it has not moved the cutting off relay to concatenate in the excitation circuit of cutting off the relay, it has overtime to cut off the relay to concatenate in the self preservation circuit of cutting off the relay; when the fixed operation relay or the reverse operation relay is driven in an interlocking mode, the fixed cut-off relay and the overtime cut-off relay are started to be driven to be excited, after the preset time, if the fixed cut-off relay is preset for 6.5S and the overtime cut-off relay is preset for 30S, the fixed cut-off relay and the overtime cut-off relay lose magnetism and fall down after the preset time; so that the cut-off relay is demagnetized and falls down, thereby reliably cutting off the drive circuit of the magnetic suspension turnout switch machine. This application embodiment is simple structure not only, can reliably cut off magnetic suspension switch point machine drive circuit moreover, has further promoted the security.
Description
Technical Field
The embodiment of the utility model provides a relate to and belong to circuit control technical field, concretely relates to switch control interface circuit.
Background
The current interface circuit of magnetic suspension turnout and signal has two different cases:
firstly, a signal system sends positioning operation relay information, reverse position operation relay information, microcomputer consent relay information and locking relay information to a turnout; the turnout sends fault relay information, positioning indication relay information, reverse position indication relay information, on-site state relay information and on-site request relay information to a signal system. The signal and the turnout adopt simple relay interfaces to transmit turnout control commands and state representation information, and a signal system does not consider the safety protection function of an electric control part of the turnout under various fault conditions according to the traditional turnout control design concept.
Compared with the first type, the second type is additionally provided with a strong control relay, a cut-off relay, a turnout one-start relay, a turnout two-start relay and an emergency button relay besides the interface relay with the same function; the relay interface circuit is designed to adjust the control instruction output time sequence through a mature three-stage starting circuit of the state railway, and the technical conditions of the mature state railway turnout control circuit are adjusted and then applied to the magnetic suspension turnout control project. However, the interface circuit can cause that when the turnout is quickly switched by manual operation, the actual positions of the turnout two starting relay and the outdoor turnout are inconsistent.
Above-mentioned two kinds of schemes all can lead to switch board inner member to carry the start, influence motor life.
SUMMERY OF THE UTILITY MODEL
To solve at least one problem of the prior art, at least one embodiment of the present invention provides a switch control interface circuit.
A kind of switch control interface circuit, including excitation circuit and self-protecting circuit which cut off the relay of the cut-off relay, connect the inactive cut-off relay in the excitation circuit which cuts off the relay in series, connect the overtime cut-off relay in the self-protecting circuit which cuts off the relay in series;
the exciting circuit for cutting off the relay includes: the relay comprises a positive power supply, an unmoved cut-off relay, a cut-off relay coil and a negative power supply;
the signal end of the positive power supply is electrically connected with the first group of middle contacts of the motionless cut-off relay; the first group of front contacts of the non-movable cut-off relay is electrically connected with the first terminal of the coil of the cut-off relay; the fourth terminal of the cut-off relay coil is electrically connected with the signal end of the negative power supply;
the self-protection circuit of the overtime cut-off relay of concatenating includes: the system comprises a positive power supply, a positioning indicating relay, a reverse position indicating relay, an overtime cut-off relay, a cut-off relay and coils corresponding to the cut-off relay;
the signal end of the positive power supply is electrically connected with the third group of middle contacts of the positioning indication relay; the third group of rear contacts of the positioning representation relay is electrically connected with the third group of middle contacts of the reverse position representation relay; the reverse position indicates that the third group of rear contacts of the relay is electrically connected with the first group of middle contacts of the overtime cut-off relay; the first group of front contacts of the overtime cut-off relay is electrically connected with the first group of middle contacts of the cut-off relay; the first group of front contacts of the cut-off relay is electrically connected with the first terminal of the coil corresponding to the cut-off relay.
In some embodiments, the stationary disconnect relay and the timeout disconnect relay are both time relays.
In some embodiments, a plurality of terminals of the stationary disconnect relay coil are each electrically connected to the interlock system interface cabinet; and a plurality of terminals of the overtime cut-off relay coil are electrically connected with the interlocking system interface cabinet.
In some embodiments, the stationary cutoff relay and the timeout cutoff relay each include a drive circuit.
In some embodiments, the interlock system is part of the signaling system.
In some embodiments, the switch further comprises a switch interface circuit, the switch interface circuit comprising: the switch comprises a positive power supply, a first fuse, a centralized state relay, a cut-off relay, a positioning operation relay, a positioning operator of a switch control cabinet, a switch control system, a second fuse, a negative power supply, a positioning operation relay, a reverse operator of the switch control cabinet and the switch control system;
a signal terminal of the positive power supply is electrically connected with a first terminal of the first fuse; a second terminal of the first fuse is electrically connected to a first set of intermediate contacts of the centralized state relay; the first group of front contacts of the centralized state relay is electrically connected with the third group of middle contacts of the cut-off relay; the third group of front contacts of the cut-off relay is electrically connected with the first group of middle contacts of the positioning operation relay; the first group of front contacts of the positioning operation relay is electrically connected with the input end of a positioning operator of the turnout control cabinet; the output end of a positioning operator of the turnout control cabinet is electrically connected with the input end of a turnout control system; the output end of the turnout control system is electrically connected with a fourth group of front contacts of the cut-off relay; the fourth group of middle contacts of the cut-off relay is electrically connected with the second group of front contacts of the centralized state relay; the second set of contacts of the centralized state relay is electrically connected with the second terminal of the second fuse; a first terminal of the second fuse is electrically connected to a negative power supply;
the first group of rear contacts of the positioning operation relay are also electrically connected with the first group of middle contacts of the reverse operation relay; the first group of middle contacts of the reverse operation relay is electrically connected with the input end of a reverse operator of the turnout control cabinet; the output end of the reverse operator of the turnout control cabinet is electrically connected with the input end of the turnout control system; and the output end of the turnout control system is electrically connected with the fourth group of front contacts of the cut-off relay.
In some embodiments, the switch interface circuit further comprises: the switch comprises a positive power supply, a first fuse, a locking protection relay, a cut-off relay, a centralized state relay, a locking protection repeat relay of a switch control cabinet, a second fuse and a negative power supply;
a signal terminal of the positive power supply is electrically connected with a first terminal of the first fuse; the second terminal of the first fuse is electrically connected with the first group of middle contact points of the locking protection relay; the first group of front contacts of the locking protective relay is electrically connected with the fifth group of middle contacts of the cut-off relay; the front contact of the fifth group of the cut-off relay is electrically connected with the front contact of the third group of the centralized state relay; the third group of middle contacts of the centralized state relay is electrically connected with the input end of the locking protection repeat relay of the turnout control cabinet; the output end of the locking protection repeat relay of the turnout control cabinet is electrically connected with the fourth group of middle contacts of the centralized state relay; the fourth group of front contacts of the centralized state relay is electrically connected with the sixth group of front contacts of the cut-off relay; the contact in the sixth group of the cut-off relay is electrically connected with the front contact in the second group of the locking protective relay; a second set of middle contacts of the lockout protection relay is electrically connected with a second terminal of the second fuse; the first terminal of the second fuse is electrically connected to a signal terminal of the negative power supply.
The embodiment of the utility model provides an advantage lies in: the method comprises the steps that an excitation circuit of a cut-off relay is connected with an inactive cut-off relay in series, a self-protection circuit of the cut-off relay is connected with an overtime cut-off relay in series, the inactive cut-off relay and the overtime cut-off relay are driven in a linkage mode within preset time, and the inactive cut-off relay loses magnetism and falls down after the preset time; when the turnout starting circuit cannot be switched due to reasons after the turnout starting circuit acts, the starting circuit stops working after the preset time, and the turnout cannot be switched any more; the magnetic loss of the overtime cut-off relay falls down after the preset time, so that the turnout control motor needs to be converted after the preset time, when the turnout control motor is thrown and is not converted to the end within the time, the starting circuit stops working, the turnout is ensured not to be converted again, the driving circuit of the magnetic suspension turnout switch machine is reliably cut off, and the safety is further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed for describing the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings according to the drawings.
Fig. 1 is one of the schematic diagrams of a switch control interface circuit provided by the present invention;
fig. 2 is a second schematic diagram of a switch control interface according to the present invention;
fig. 3 is a schematic diagram of a switch control interface circuit according to the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are some, but not all embodiments of the invention. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
Fig. 1 is one of the schematic diagrams of the switch control interface circuit provided by the present invention.
A kind of switch control interface circuit, including excitation circuit 1 and self-protecting circuit 2 of the cut-off relay, connect in series the intact cut-off relay WDQDJ in the excitation circuit 1 of the cut-off relay, connect in series the overtime cut-off relay CSQDJ in the self-protecting circuit 2 of the cut-off relay;
wherein, excitation circuit 1 of cutting off the relay includes: positive power supply KZ, unmoved disconnect relay WDQDJ, disconnect relay QDJ coil and negative power supply KF;
the signal end of the positive power supply KZ is electrically connected with a first group of middle contacts of the passive cutoff relay WDQDJ; a first set of front contacts of the unmoved disconnect relay WDQDJ are electrically connected to a first terminal of a coil of the disconnect relay QDJ; a fourth terminal of the coil of the cut-off relay QDJ is electrically connected with a signal end of a negative power supply KF;
self-protection circuit of series connection overtime cut-off relay CSQDJ includes: coils corresponding to the positive power supply KZ, the positioning indicating relay DBJ, the reverse position indicating relay FBJ, the overtime cut-off relay CSQDJ, the cut-off relay QDJ and the cut-off relay QDJ;
the signal end of the positive power supply KZ is electrically connected with a third group of middle contacts of the positioning representation relay DBJ; positioning a third group of rear contacts of the representation relay DBJ to be electrically connected with a third group of middle contacts of the reverse representation relay FBJ; the reverse position indicates that the third group of rear contacts of the relay FBJ is electrically connected with the first group of middle contacts of the overtime cut-off relay CSQDJ; the first group of front contacts of the overtime cut-off relay CSQDJ are electrically connected with the first group of middle contacts of the cut-off relay QDJ; the first set of front contacts of the disconnecting relay QDJ is electrically connected to the first terminal of the coil corresponding to the disconnecting relay QDJ.
Specifically, the excitation circuit 2 of the cut-off relay is connected with the front contact of the non-actuated cut-off relay in series, and meanwhile, the self-protection circuit of the cut-off relay QDJ is formed by the rear contacts of the third group of the positioning indication relay DBJ, the reverse position indication relay FBJ and the front contact of the first group of the overtime cut-off relay CSQDJ, and participates in the control of the magnetic suspension turnout together. When the fixed operating relay DCJ or the reverse operating relay FCJ is driven in an interlocking manner, the unmoved disconnecting relay WDQDJ and the overtime disconnecting relay CSQDJ are started to be excited, after a preset time, for example, 6.5S of the unmoved disconnecting relay is preset, the excitation is lost, so that the disconnecting relay QDJ is enabled to be demagnetized and dropped, and after a preset time, for example, the excitation is lost and dropped after the preset overtime disconnecting relay CSQDJ 30S; therefore, the cutoff relay QDJ loses magnetism and falls down, and the cutoff relay QDJ loses magnetism and falls down due to excitation of the normal positioning indication relay DBJ or the positioning indication relay FBJ, so that a driving circuit of the magnetic suspension turnout switch machine is reliably cut off.
In the description of the present invention, it should be noted that 6.5s and 30s are only delay times designed for a certain switch performance parameter, and unless otherwise explicitly specified and limited, the delay times should be broadly construed. The selection of delay times in the specific meaning and for specific applications of the present invention and the utility model can be understood in specific cases by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention, such as the case of using a similar control cabinet and its interface circuit in a monorail system, should be included in the protection scope of the present invention.
In some embodiments, the unmoved disconnect relay WDQDJ and the timeout disconnect relay CSQDJ are both time relays.
Fig. 2 is a schematic diagram of a switch control interface according to the present invention.
With reference to fig. 2, the locking protection relay SFJ, the unmoved blocking relay WDQDJ, and the overtime blocking relay CSQDJ are relay conditions output by the computer, and require to start timing while driving the DCJ or FCJ, and output a command of loss of magnetic field and drop to the unmoved blocking relay WDQDJ and the overtime blocking relay CSQDJ after a certain time, thereby reliably blocking the drive circuit of the magnetic suspension switch machine.
In some embodiments, a plurality of terminals of the WDQDJ coil of the unmoved disconnect relay are each electrically connected to the interlock system interface cabinet; and a plurality of terminals of the overtime cut-off relay CSQDJ coil are electrically connected with the interlocking system interface cabinet.
Specifically, the time for switching off the relay in an inactive mode and the time for switching off the relay in an overtime mode are set according to the characteristics of the magnetic suspension turnout, and the corresponding relay is driven to be in an excitation state all the time according to the characteristics of the turnout during the design of the interlocking system.
In some embodiments, the unmoved disconnect relay WDQDJ and the timeout disconnect relay CSQDJ each comprise a drive circuit.
Specifically, the driving circuit is determined according to the interlocking system, and drives the corresponding relay to be in an excitation state all the time according to the turnout characteristics when the interlocking system is designed.
In some embodiments, the interlock system is part of the signaling system.
Fig. 3 is a schematic diagram of a switch control interface circuit according to the present invention.
In some embodiments, in combination with fig. 3, a switch control interface circuit, further comprising: switch interface circuit, this switch interface circuit includes: the switch control system comprises a positive power supply Z24, a first fuse RD1, a centralized state relay JZZJ, a cut-off relay QDJ, a positioning operation relay DCJ, a positioning operator NCJ of a switch control cabinet, a switch control system, a second fuse, a negative power supply, a positioning operation relay, a reverse operator of the switch control cabinet and a switch control system;
a signal terminal of the positive power supply Z24 is electrically connected to a first terminal of the first fuse RD 1; a second terminal of the first fuse RD1 is electrically connected to a first set of intermediate contacts of the centralized state relay JZZJ; the first group of front contacts of the centralized state relay JZZJ is electrically connected with the third group of middle contacts of the cut-off relay QDJ; the third group of front contacts of the disconnecting relay QDJ is electrically connected with the first group of middle contacts of the positioning operation relay DCJ; the first group of front contacts of the positioning operation relay DCJ are electrically connected with the input end of a positioning operator NCJ of the turnout control cabinet; the output end of the positioning operator NCJ of the turnout control cabinet is electrically connected with the input end of the turnout control system; the output end of the turnout control system is electrically connected with the fourth group of front contacts of the cut-off relay QDJ; the contact point in the fourth group of the disconnecting relay QDJ is electrically connected with the front contact point in the second group of the centralized state relay JZZJ; the second set of contacts of the centralized state relay JZZJ is electrically connected to the second terminal of the second fuse RD 2; a first terminal of the second fuse RD2 is electrically connected to a signal terminal of the negative power supply;
the first group of rear contacts of the positioning operation relay DCJ are also electrically connected with the first group of middle contacts of the reverse operation relay FCJ; the first group of middle contacts of the reverse operation relay FCJ are electrically connected with the input end of a reverse operator RCJ of the turnout control cabinet; the output end of a reverse operator RCJ of the turnout control cabinet is electrically connected with the input end of a turnout control system; and the output end of the turnout control system is electrically connected with the fourth group of front contacts of the cut-off relay QDJ.
In some embodiments, the switch interface circuit further comprises: the switch control cabinet comprises a positive power supply Z24, a first fuse RD1, a locking protection relay SFJ, a disconnecting relay QDJ, a centralized state relay JZZJ, locking protection duplicate relays SFJF1 and SFJF2 of the switch control cabinet, a second fuse RD2 and a negative power supply F24;
a signal terminal of the positive power supply is electrically connected to a first terminal of the first fuse RD 1; the second terminal of the first fuse RD1 is electrically connected to the first set of middle contacts of the lockout guard relay SFJ; the first group of front contacts of the locking protection relay SFJ is electrically connected with the fifth group of middle contacts of the disconnecting relay QDJ; the front contact of the fifth group of the cut-off relay QDJ is electrically connected with the front contact of the third group of the centralized state relay JZZJ; the third group of middle contacts of the centralized state relay JZZJ is electrically connected with the input ends of locking protection duplicate relays SFJF1 and SFJF2 of the turnout control cabinet; the output ends of locking protection duplicate relays SFJF1 and SFJF2 of the turnout control cabinet are electrically connected with the fourth group of middle contacts of the concentrated state relay JZZJ; the fourth group of front contacts of the centralized state relay JZZJ is electrically connected with the sixth group of front contacts of the cut-off relay QDJ; the contact point in the sixth group of the disconnecting relay QDJ is electrically connected with the front contact point in the second group of the locking protection relay SFJ; the second group of middle contacts of the locking protection relay SFJ is electrically connected with the second terminal of the second fuse RD 2; the first terminal of the second fuse is electrically connected to the signal terminal of the negative power supply F24.
Specifically, by adding the cut-off relay QDJ in the magnetic suspension turnout control loop, even if the interlocking driving fixed operation relay DCJ and the reverse operation relay FCJ are excited before the locking protection relay SFJ, under the condition that the cut-off relay QDJ is not excited (the locking protection relay SFJ is not excited, the condition corresponds to the interlocking driving logic that the fixed operation relay DCJ and the reverse operation relay FCJ are excited before the locking protection relay SFJ), the switcher alternating current lock-out device has no power supply, and the problem of 'loaded start' does not exist.
In the embodiment of the utility model, the switch control cabinet controlled by the circuit of the embodiment of the application is arranged indoors, and the operation panel and the junction box are arranged beside the rail running area; the operation panel is electrically connected with the turnout control cabinet, the turnout travel switch, the locking motor and interface equipment of the switch motor; the junction box is electrically connected with the turnout control cabinet, the turnout travel switch, the locking motor and the interface equipment of the switch motor.
The turnout control cabinet is arranged indoors, so that the difficulty in installation and debugging of equipment is reduced, the difficulty in operation and maintenance is reduced, and the field processing time of turnout failure is shortened; meanwhile, an outdoor cabinet of the original turnout control cabinet can be eliminated, so that the engineering investment and the equipment construction complexity are reduced, and the maintenance and the operation management are facilitated.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
It will be appreciated by those of skill in the art that although some embodiments described herein include some but not other features included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (7)
1. The turnout control interface circuit is characterized by comprising an excitation circuit of a cut-off relay and a self-protection circuit of the cut-off relay, wherein the excitation circuit of the cut-off relay is connected with an un-actuated cut-off relay in series, and the self-protection circuit of the cut-off relay is connected with an overtime cut-off relay in series;
the exciting circuit for cutting off the relay includes: the relay comprises a positive power supply, an unmoved cut-off relay, a cut-off relay coil and a negative power supply;
the signal end of the positive power supply is electrically connected with the first group of middle contacts of the motionless cut-off relay; the first group of front contacts of the non-moving cut-off relay is electrically connected with the first terminal of the coil of the cut-off relay; a fourth terminal of the cut-off relay coil is electrically connected with a signal end of the negative power supply;
the self-protection circuit of the overtime cut-off relay of concatenating includes: the system comprises a positive power supply, a positioning indicating relay, a reverse position indicating relay, an overtime cut-off relay, a cut-off relay and coils corresponding to the cut-off relay;
the signal end of the positive power supply is electrically connected with the third group of middle contacts of the positioning indication relay; the third group of rear contacts of the positioning representation relay is electrically connected with the third group of middle contacts of the reverse positioning representation relay; the third group of rear contacts of the reverse indicating relay is electrically connected with the first group of middle contacts of the overtime cut-off relay; the first group of front contacts of the overtime cut-off relay is electrically connected with the first group of middle contacts of the cut-off relay; the first group of front contacts of the cut-off relay is electrically connected with the first terminal of the coil corresponding to the cut-off relay.
2. The circuit of claim 1, wherein the stationary cutoff relay and the timeout cutoff relay are each time relays.
3. The circuit of claim 1, wherein a plurality of terminals of the stationary disconnect relay coil are each electrically connected to an interlock system interface cabinet; and a plurality of terminals of the overtime cut-off relay coil are electrically connected with the interlocking system interface cabinet.
4. The circuit of claim 3, wherein the stationary cutoff relay and the timeout cutoff relay each comprise a drive circuit.
5. The circuit of claim 4, wherein the interlock system is part of a signaling system.
6. The circuit of claim 1, further comprising: switch interface circuit, switch interface circuit includes: the switch comprises a positive power supply, a first fuse, a centralized state relay, a cut-off relay, a positioning operation relay, a positioning operator of a switch control cabinet, a switch control system, a second fuse, a negative power supply, a positioning operation relay, a reverse operator of the switch control cabinet and the switch control system;
a signal terminal of the positive power supply is electrically connected to a first terminal of the first fuse; a second terminal of the first fuse is electrically connected to a first set of midpoint contacts of the centralized state relay; the first group of front contacts of the centralized state relay is electrically connected with the third group of middle contacts of the cut-off relay; the third group of front contacts of the cut-off relay is electrically connected with the first group of middle contacts of the positioning operation relay; the first group of front contacts of the positioning operation relay is electrically connected with the input end of a positioning operator of the turnout control cabinet; the output end of the positioning operator of the turnout control cabinet is electrically connected with the input end of the turnout control system; the output end of the turnout control system is electrically connected with the fourth group of front contacts of the cut-off relay; the fourth group of middle contacts of the cut-off relay is electrically connected with the second group of front contacts of the centralized state relay; the second set of contacts of the centralized state relay are electrically connected to the second terminal of the second fuse; a first terminal of the second fuse is electrically connected to a signal terminal of the negative power supply;
the first group of rear contacts of the positioning operation relay are also electrically connected with the first group of middle contacts of the reverse operation relay; the first group of middle contacts of the reverse operation relay is electrically connected with the input end of a reverse operator of the turnout control cabinet; the output end of the reverse operator of the turnout control cabinet is electrically connected with the input end of the turnout control system; and the output end of the turnout control system is electrically connected with the fourth group of front contacts of the cut-off relay.
7. The circuit of claim 6, wherein the switch interface circuit further comprises: the switch comprises a positive power supply, a first fuse, a locking protection relay, a cut-off relay, a centralized state relay, a locking protection repeat relay of a switch control cabinet, a second fuse and a negative power supply;
a signal terminal of the positive power supply is electrically connected to a first terminal of the first fuse; a second terminal of the first fuse is electrically connected with a first set of midpoint contacts of the lockout protection relay; the first group of front contacts of the locking protection relay is electrically connected with the fifth group of middle contacts of the cut-off relay; the fifth group of front contacts of the cut-off relay is electrically connected with the third group of front contacts of the centralized state relay; the third group of middle contacts of the centralized state relay is electrically connected with the input end of the locking protection repeat relay of the turnout control cabinet; the output end of the locking protection repeat relay of the turnout control cabinet is electrically connected with the fourth group of middle contact points of the centralized state relay; the fourth group of front contacts of the centralized state relay is electrically connected with the sixth group of front contacts of the cut-off relay; the contact in the sixth group of the cut-off relay is electrically connected with the second group of front contacts of the locking protective relay; a second set of middle contacts of the lockout protection relay is electrically connected with a second terminal of the second fuse; the first terminal of the second fuse is electrically connected to a signal terminal of the negative power supply.
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| CN201921598842.6U CN211032596U (en) | 2019-09-24 | 2019-09-24 | Switch control interface circuit |
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| CN201921598842.6U CN211032596U (en) | 2019-09-24 | 2019-09-24 | Switch control interface circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113147829A (en) * | 2021-05-11 | 2021-07-23 | 钟志旺 | Multi-interlock shared turnout control device |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113147829A (en) * | 2021-05-11 | 2021-07-23 | 钟志旺 | Multi-interlock shared turnout control device |
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