CN211702003U - Delay circuit and system for nuclear power station - Google Patents
Delay circuit and system for nuclear power station Download PDFInfo
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- CN211702003U CN211702003U CN202020293428.0U CN202020293428U CN211702003U CN 211702003 U CN211702003 U CN 211702003U CN 202020293428 U CN202020293428 U CN 202020293428U CN 211702003 U CN211702003 U CN 211702003U
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Abstract
The application relates to a delay circuit and system for nuclear power station, the delay circuit for nuclear power station includes: the power supply conversion module comprises a positive input end, a negative input end, a positive output end and a negative output end, wherein the positive input end is connected with the delay signal source, and the negative input end is connected with the negative electrode of the power supply; the delay module comprises a power supply input end, a delay output end and a delay signal input end, wherein the power supply input end is connected with the negative electrode output end, the delay signal input end is connected with a delay signal source and used for inputting a delay signal, and the delay output end delays and outputs a conduction control signal; the conduction module is respectively connected with the positive electrode output end, the delay output end and the delay signal input end and is used for conducting a link between the power supply and at least one load under the action of the power supply signal, the conduction control signal and the delay signal output by the positive electrode output end. According to the method and the device, the power is supplied to the delay module when the delay signal exists, and the problem of halt caused by long-term power supply is solved.
Description
Technical Field
The application relates to a time delay system for a nuclear power station, in particular to a time delay circuit and a time delay system for a nuclear power station.
Background
The nuclear power station widely uses a delay relay, and the delay relay is mainly applied to various instrument control loops. However, the conventional time delay relay can be subjected to a 'crash' condition when frequently acting, so that time delay cannot be realized, and the conventional method can only be used for plugging and unplugging again or electrifying, so that the fault phenomenon can disappear, but the problem cannot be effectively solved for a long time.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a delay circuit and a system for a nuclear power station, which aim at the problem that a delay relay frequently operates and crashes.
A delay circuit for a nuclear power plant, comprising:
the power supply conversion module comprises a positive input end, a negative input end, a positive output end and a negative output end, wherein the positive input end is connected with the delay signal source, and the negative input end is connected with the negative electrode of the power supply;
the delay module comprises a power supply input end, a delay output end and a delay signal input end, wherein the power supply input end is connected with the cathode output end, the delay signal input end is connected with the delay signal source and used for inputting the delay signal, and the delay output end is used for outputting a conduction control signal in a delayed manner;
and the conduction module is respectively connected with the anode output end, the delay output end and the delay signal input end and is used for conducting a link between the power supply and at least one load under the action of the power supply signal output by the anode output end, the conduction control signal and the delay signal.
In one embodiment, the conducting module includes:
the excitation coil is connected with the positive output end, the delay output end and the delay signal input end and is used for generating an excitation signal under the action of the power supply signal output by the positive output end, the conduction control signal and the delay signal;
and the interface relay is connected with the excitation coil and used for exciting under the action of the excitation signal and conducting the link.
In one embodiment, the exciting coil includes: the first control end is connected with the positive electrode output end, and the second control end is connected with the delay output end.
In one embodiment, the interface relay is connected with the output control end.
In one embodiment, the delay signal source is connected to the delay signal input terminal via a forward diode.
In one embodiment, the delay module is a delay relay.
In one embodiment, the delay module is a single-chip integrated delay relay.
A time delay system for a nuclear power plant, the time delay system for a nuclear power plant comprising:
the system comprises a power supply, a delay signal source and at least one electrical device;
the delay circuit for the nuclear power station is respectively connected with the power supply, the delay signal source and the at least one electrical device, and is used for conducting a link between the power supply and the at least one electrical device according to a delay signal.
In one embodiment, the conducting module includes: the excitation coil is connected with the positive output end, the delay output end and the delay signal input end and is used for generating an excitation signal under the action of the power supply signal output by the positive output end, the conduction control signal and the delay signal; the interface relay is connected with the excitation coil and used for exciting under the action of the excitation signal and enabling the link to be conducted; the at least one electrical device is connected to the interface relay.
Above-mentioned time delay circuit and system for nuclear power station, time delay system for nuclear power station includes: power supply, time delay signal source and at least one electrical equipment, nuclear power station is with time delay circuit includes: the power supply conversion module comprises a positive input end, a negative input end, a positive output end and a negative output end, wherein the positive input end is connected with the delay signal source, and the negative input end is connected with the negative electrode of the power supply; the delay module comprises a power supply input end, a delay output end and a delay signal input end, wherein the power supply input end is connected with the cathode output end, the delay signal input end is connected with the delay signal source and used for inputting the delay signal, and the delay output end is used for outputting a conduction control signal in a delayed manner; and the conduction module is respectively connected with the anode output end, the delay output end and the delay signal input end and is used for conducting a link between the power supply and at least one electrical device under the action of the power supply signal output by the anode output end, the conduction control signal and the delay signal. According to the method and the device, the power supply input end of the delay module is powered when the delay signal exists, so that the problem of halt caused by long-term power supply is solved under the condition that the delay function is not influenced.
Drawings
Fig. 1 is a schematic structural diagram of a delay circuit for a nuclear power plant according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a delay circuit for a nuclear power plant according to another embodiment of the present application;
fig. 3 is a schematic structural diagram of a delay system for a nuclear power plant according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, and in the accompanying drawings, preferred embodiments of the present application are set forth. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
An embodiment of the present application provides a delay circuit for a nuclear power station, as shown in fig. 1, and is applied to a delay system for a nuclear power station, where the delay system for a nuclear power station includes: power supply, time delay signal source and load, the nuclear power station is with delay circuit includes: a power conversion module 110, a delay module 120 and a conduction module 130. The power conversion module 110 comprises a positive input end a, a negative input end b, a positive output end + and a negative output end-, the positive input end a is connected with a port 409 of the delay signal source, and the negative input end b is connected with a negative electrode 400 of the power supply; the delay module 120 comprises a power supply input end c, a delay output end d and a delay signal input end e, wherein the power supply input end c is connected with the negative electrode output end, the delay signal input end e is connected with a port 409 of a delay signal source, the delay signal input end e is used for inputting a delay signal, and the delay output end d is used for outputting a conduction control signal in a delayed manner; and the conduction module 130 is respectively connected to the positive output terminal +, the delay output terminal d, and the delay signal input terminal e, and is configured to conduct a link between the power supply and the load under the actions of the power supply signal output by the positive output terminal +, the conduction control signal output by the delay output terminal d, and the delay signal input by the port 409 of the delay signal source.
In this application, the port 409 of the delay signal source is shorted to the positive output terminal +. When no delay signal exists, the positive output end + and the port 409 of the delay signal source are not electrified and are positively charged, and the delay module 120 is in a 'rest' shutdown state; when the port 409 of the delay signal source outputs the delay signal, the port 409 of the delay signal source outputs a positive electric signal, and the positive electric signal is transmitted to the positive output end + through the short-circuit wire, so that the power supply of the internal chip is provided for the delay module, and the delay function is realized. The delay mode comprises a front delay mode and a rear delay mode.
The above-mentioned delay circuit for nuclear power station is applied to the delay system for nuclear power station, and the delay system for nuclear power station includes: power supply, time delay signal source and load, the nuclear power station is with delay circuit includes: the power conversion module 110 comprises a positive input end a, a negative input end b, a positive output end + and a negative output end-, the positive input end a is connected with the delay signal source, and the negative input end b is connected with the negative electrode of the power supply; the delay module 120 comprises a power supply input end c, a delay output end d and a delay signal input end e, wherein the power supply input end c is connected with the negative electrode output end, the delay signal input end e is connected with a delay signal source and used for inputting a delay signal, and the delay output end d delays and outputs a conduction control signal; and the conduction module 130 is respectively connected to the positive output terminal +, the delay output terminal d, and the delay signal input terminal e, and is configured to conduct a link between the power supply and the load under the action of the power supply signal, the conduction control signal, and the delay signal output by the positive output terminal +. According to the method and the device, the power supply input end c of the delay module 120 is powered when the delay signal exists, so that the problem of halt caused by long-term power supply is solved under the condition that the delay function is not influenced. The delay circuit for the nuclear power station directly solves the problem that unexpected crash of an internal chip of a delay relay caused by long-term power supply in the original design technically, and the optimized technology can be directly modified on the current design framework, so that operation is convenient. Specifically, the delay circuit for the nuclear power station can directly solve the problem of faults caused by the fact that the emergency compressed air production system of the nuclear power station unit is halted due to the delay relay for a long time, faults do not occur after optimization, and equipment reliability is improved. The device can be applied to all control loops using the time delay function before the time delay relay is used on site in a nuclear power station, and is particularly suitable for the time delay relay which is frequently operated.
In one embodiment, as shown in fig. 2, the pass-through module 130 includes: an excitation coil 131 and an interface relay 132. The excitation coil 131 is connected with the positive output end +, the delay output end d and the delay signal input end e, and is used for generating an excitation signal under the action of a power supply signal, a conduction control signal and a delay signal output by the positive output end +; and an interface relay 132 connected to the excitation coil 131, and configured to excite and conduct the link under the action of the excitation signal.
In one embodiment, the exciting coil 131 includes: the delay circuit comprises a first control end f, a second control end g, a third control end h and an output control end, wherein the first control end f is connected with a positive output end +, the second control end g is connected with a delay output end d, and the third control end h is connected with a disconnection 409 of a delay signal source. In one embodiment, the interface relay is connected with the output control terminal.
Specifically, the excitation coil 131 includes a first control terminal f, a second control terminal g, a third control terminal h, and an output control terminal, where the first control terminal f is connected to the positive output terminal +. The first control end f is connected with the anode output end + and can receive a power supply signal output by the anode output end +; the second control terminal g is connected with the delay output terminal d and can receive the conduction control signal output by the delay output terminal d. When the excitation coil 131 receives the power supply signal, the conduction control signal, and the delay signal, an excitation signal is generated by excitation under the action of the power supply signal, the conduction control signal, and the delay signal. The excitation is to provide stator power supply for the generator or the stator of the synchronous motor, and provide working magnetic field for the generator and the like (electrical equipment working by utilizing the electromagnetic induction principle).
In one embodiment, as shown in fig. 2, the interface relay includes a first set of contacts, a second set of contacts, and a third set of contacts, the first contacts and the second set of contacts are in constant contact to make the link in an open state; under the action of the excitation signal, the first group of contacts are switched to be connected with the third group of contacts so as to conduct the link.
Specifically, the first contact includes 401, 403, 404, 405, and 406. The second set of contacts includes 430, 440, and 450. The third set of contacts includes 431, 441, 451, and 461. The first contact is in constant contact with the second set of contacts, and in this state the first contact is connected with the second set of contacts so that the link between the power supply and the load is in an open state. When receiving the excitation signal, the first contact is switched to be connected with the third contact, so that a link between the power supply and the load is in a disconnected state. In one embodiment, the interface relay is model V23054.
In one embodiment, the delay signal source is connected to the delay signal input via a forward diode.
Specifically, the forward diode can ensure that a positive electric signal is output to the input end of the delay signal by the delay signal source, and is favorable for ensuring the stability of the delay circuit for the nuclear power station.
In one embodiment, the delay module is a TEC2453 delay relay.
Specifically, the TEC2453 is an electronic time delay relay with a 48VDC level, and is widely used in a nuclear power plant logic control loop. The delay time range has 3 ranges, which are 0-9.9 s, 0-99 s and 0-990 s respectively. The time delay relay has 3 time delay modes: pre-delay, post-delay, and cyclic delay. The time delay mode and the time measuring range are determined by a dial on a panel of the time delay relay. The front time delay corresponds to the last bit (0-3) of the dial switch, and any time delay time (T) within the range of 0-990 s can be set; the later time delay is carried out, and any time delay time (T) within the range of 0-990 s can be set corresponding to the last bit (4-7) of the dial switch; and (3) cyclic delay, which corresponds to the last bit (8, 9) of the dial switch, and can set the high-low level switching of 50% duty ratio at any time (T) within the range of 0-99 s.
In one embodiment, the delay module is a single-chip integrated delay relay. Specifically, the singlechip integrated delay relay controls delay time and a delay mode by utilizing the singlechip.
The application provides a time delay system for nuclear power station, as shown in fig. 3, the time delay system for nuclear power station includes: a power supply 20, a delay signal source 30 and at least one electrical device 40; the delay circuit 10 for the nuclear power plant is respectively connected with the power supply 20, the delay signal source 30 and the at least one electrical device 40, and the delay circuit 10 for the nuclear power plant is used for conducting a link between the power supply 20 and the at least one electrical device 40 according to the delay signal.
In one embodiment, the pass-through module 130 includes: the excitation coil 131 is connected with the positive output end +, the delay output end d and the delay signal input end e and is used for generating an excitation signal under the action of a power supply signal, a conduction control signal and a delay signal output by the positive output end +; an interface relay 132 connected to the excitation coil 131, for exciting and conducting the link circuit under the action of the excitation signal; at least one electrical device is connected to the interface relay 132.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. It should be noted that "one embodiment," "for example," and the like in the present application are intended to illustrate the present application, and are not intended to limit the present application.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A delay circuit for a nuclear power plant, comprising:
the power supply conversion module comprises a positive input end, a negative input end, a positive output end and a negative output end, wherein the positive input end is connected with the delay signal source, and the negative input end is connected with the negative electrode of the power supply;
the delay module comprises a power supply input end, a delay output end and a delay signal input end, wherein the power supply input end is connected with the cathode output end, the delay signal input end is connected with the delay signal source and used for inputting the delay signal, and the delay output end is used for outputting a conduction control signal in a delayed manner;
and the conduction module is respectively connected with the anode output end, the delay output end and the delay signal input end and is used for conducting a link between the power supply and at least one load under the action of the power supply signal output by the anode output end, the conduction control signal and the delay signal.
2. The delay circuit of claim 1, wherein the pass-through module comprises:
the excitation coil is connected with the positive output end, the delay output end and the delay signal input end and is used for generating an excitation signal under the action of the power supply signal output by the positive output end, the conduction control signal and the delay signal;
and the interface relay is connected with the excitation coil and used for exciting under the action of the excitation signal and conducting the link.
3. The delay circuit of claim 2, wherein the field coil comprises: the first control end is connected with the positive electrode output end, and the second control end is connected with the delay output end.
4. The delay circuit of claim 3, wherein the interface relay is connected to the output control terminal.
5. The delay circuit of claim 2, wherein the interface relay comprises: the first set of contacts and the second set of contacts are in constant contact to enable the link to be in an off state; under the action of the excitation signal, the first group of contacts are switched to be connected with the third group of contacts so as to conduct the link.
6. The delay circuit of claim 1, wherein the delay signal source is coupled to the delay signal input via a forward diode.
7. The delay circuit of claim 1, wherein the delay module is a delay relay.
8. The delay circuit for a nuclear power plant as recited in claim 1, wherein the delay module is a single-chip integrated delay relay.
9. A time delay system for a nuclear power station, characterized by comprising:
the system comprises a power supply, a delay signal source and at least one electrical device;
the delay circuit for a nuclear power plant as recited in any one of claims 1 to 8, being connected to the power supply, the delay signal source and the at least one electrical device, respectively, for rendering a link between the power supply and the at least one electrical device conductive in accordance with the delay signal.
10. The delay system for a nuclear power plant of claim 9,
the conduction module includes: the excitation coil is connected with the positive output end, the delay output end and the delay signal input end and is used for generating an excitation signal under the action of the power supply signal output by the positive output end, the conduction control signal and the delay signal; the interface relay is connected with the excitation coil and used for exciting under the action of the excitation signal and enabling the link to be conducted;
the at least one electrical device is connected to the interface relay.
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| CN202020293428.0U CN211702003U (en) | 2020-03-11 | 2020-03-11 | Delay circuit and system for nuclear power station |
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| CN202020293428.0U CN211702003U (en) | 2020-03-11 | 2020-03-11 | Delay circuit and system for nuclear power station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114690667A (en) * | 2022-03-22 | 2022-07-01 | 深圳市欧瑞博科技股份有限公司 | Load control method and device, intelligent switch and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114690667A (en) * | 2022-03-22 | 2022-07-01 | 深圳市欧瑞博科技股份有限公司 | Load control method and device, intelligent switch and storage medium |
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