Multi-channel leakage detector simulation device

Abstract

The utility model relates to a multichannel leakage detector simulation device. The simulation device comprises a channel selection module, a state switching module and a plurality of leakage detector simulation units. The channel selection module comprises a plurality of selection ends, each selection end is connected with one leakage detector simulation unit, and a common end of the channel selection module is connected with one end of the state switching module. The channel selection module is used for gating one of all the leakage detector simulation units. And each leakage detector simulation unit is a simulation measurement channel. And the state switching module is used for selecting a leakage mode or a non-leakage mode for the gated leakage detector simulation unit. The leakage detector simulation unit is used for simulating and generating output signals similar to those of a leakage detector in a nuclear power unit in different working modes. According to the utility model, high-efficiency multi-channel testing can be realized through modular design, the testing efficiency is improved, the reliability is high, and the maintenance and manufacturing cost is low.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power plant leak detector simulation technology, and in particular to a multi-channel leak detector simulation device. Background Technology

[0002] In the RIC (Reactor Core Measurement System) of nuclear power plants, leak detectors are used to monitor the integrity of sealing assemblies and finger sleeves. Related technologies for leak detection simulators typically suffer from the following problems: a limited number of channels, making it difficult to match the testing requirements of multiple detectors in actual systems. For example, the CPR1000 unit has a total of 50 channels for leak detectors on sealing assemblies and finger sleeves; spare parts are imported from abroad and are expensive; the simulation state switching is complex, making it impossible to quickly select between leak and non-leak modes; and the lack of modular design leads to high maintenance and expansion costs. Utility Model Content

[0003] The technical problem to be solved by this invention is to provide a multi-channel leak detector simulation device to address the above-mentioned deficiencies.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a multi-channel leak detector simulation device, including a channel selection module, a state switching module and multiple leak detector simulation units; the channel selection module includes multiple selection terminals, each selection terminal is connected to one of the leak detector simulation units, the common terminal of the channel selection module is connected to one end of the state switching module, and the other end of the state switching module is used to connect to a power supply module.

[0005] The channel selection module is used to select one of the all leak detector simulation units; each leak detector simulation unit is a simulation measurement channel.

[0006] The state switching module is used to select a leakage mode or a non-leakage mode for the selected leakage detector simulation unit; the leakage mode simulates the alarm state of the leakage detector, and the non-leakage mode simulates the normal state of the leakage detector.

[0007] The leak detector simulation unit is used to simulate and generate output signals similar to those of leak detectors in nuclear power units under different operating modes.

[0008] Furthermore, in the multi-channel leak detector simulation device of this utility model, the channel selection module includes a multiplexer switch, each selection terminal of the multiplexer switch is connected to one of the leak detector simulation units, and the common terminal of the multiplexer switch is connected to one end of the state switching module.

[0009] Furthermore, in the multi-channel leak detector simulation device described in this utility model, the multiplexer is a 10-channel selector switch.

[0010] Furthermore, in the multi-channel leakage detector simulation device described in this utility model, the state switching module includes a dual-state switch and a resistor network module. The dual-state switch includes two selection terminals. The common terminal of the dual-state switch is connected to the common terminal of the multiplexer switch, and the two selection terminals of the dual-state switch are connected to the resistor network module.

[0011] The resistor network module provides leakage mode and non-leakage mode by simulating resistance values;

[0012] The dual-state switch is used to select the leakage mode or non-leakage mode for the selected leakage detector simulation unit and to achieve mode switching.

[0013] Furthermore, in the multi-channel leak detector simulation device of this utility model, the resistor network module includes a first resistor and a second resistor; the first end of the first resistor is connected to one of the selection terminals of the dual-state switch, the first end of the second resistor is connected to the other selection terminal of the dual-state switch, and the second ends of the first resistor and the second ends of the second resistor are connected together.

[0014] The first resistor is used to provide a leakage mode, and its resistance value is lower than a preset threshold.

[0015] The second resistor is used to provide a non-leakage mode, and its resistance value is higher than a preset threshold.

[0016] Furthermore, in the multi-channel leakage detector simulation device described in this utility model, the common terminal formed by connecting the second end of the first resistor and the second end of the second resistor is used to connect the power supply module; under 48V DC power supply conditions, the preset threshold is 80kΩ.

[0017] Furthermore, in the multi-channel leak detector simulation device described in this utility model, the resistance value of the first resistor is 70kΩ.

[0018] Furthermore, in the multi-channel leak detector simulation device described in this utility model, the resistance value of the second resistor is 90kΩ.

[0019] Furthermore, in the multi-channel leak detector simulation device described in this utility model, the multi-channel leak detector simulation device also includes a power supply module.

[0020] Furthermore, in the multi-channel leak detector simulation device described in this utility model, the power supply module provides 48V DC power to the simulation device.

[0021] The multi-channel leak detector simulation device of this invention has the following advantages: Through modular design, this invention enables a single device to support multiple channel simulations, achieving efficient multi-channel testing. Rapid switching between states and channels improves testing efficiency and allows for precise matching of actual detector thresholds, ensuring accurate test results. It also boasts high reliability and low maintenance and manufacturing costs. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the first embodiment of the multi-channel leak detector simulation device of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of a multi-channel leak detector simulation device according to some embodiments of this utility model;

[0025] Figure 3 This is a schematic diagram of the second embodiment of the multi-channel leak detector simulation device of this utility model.

[0026] Figure label:

[0027] 10: Channel selection module; 20: Status switching module; 30: Leak detector simulation unit; 40: Power supply module;

[0028] 201: Resistor network module; K1: Dual-state switch; K2: Multiplexer switch;

[0029] R100: First resistor; R200: Second resistor. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two elements or the interaction between two elements. When an element is referred to as being "on" or "below" another element, the element can be located "directly" or "indirectly" on the other element, or there may be one or more intermediary elements. The terms "first," "second," and "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0032] like Figure 1 As shown, in the first embodiment of the multi-channel leak detector simulation device of this utility model, the multi-channel leak detector simulation device of this embodiment includes a channel selection module 10, a state switching module 20, and multiple leak detector simulation units 30. The channel selection module 10 includes multiple selection terminals, each connected to one of the leak detector simulation units 30. The common terminal of the channel selection module 10 is connected to one end of the state switching module 20, and the other end of the state switching module 20 is used to connect to a power supply module 40. The channel selection module 10 is used to select one of the leak detector simulation units 30 from all the leak detector simulation units 30. Each leak detector simulation unit 30 is a simulation measurement channel. The state switching module 20 is used to select a leak mode or a non-leak mode for the selected leak detector simulation unit 30. The leak mode simulates the alarm state of the leak detector, and the non-leak mode simulates the normal state of the leak detector. The leak detector simulation unit 30 is used to simulate and generate output signals similar to those of leak detectors in nuclear power plants under different operating modes.

[0033] It is understandable that the working modes of a leak detector include a leak mode and a non-leak mode.

[0034] This embodiment utilizes a modular design, enabling a single device to support multiple channel simulations and achieve efficient multi-channel testing. Rapid switching between states and channels improves testing efficiency and allows for precise matching of actual detector thresholds, ensuring accurate test results, high reliability, and low maintenance and manufacturing costs.

[0035] Combination Figure 2 In some embodiments, the channel selection module 10 includes a multiplexer K2, each selection terminal of which is connected to a leak detector simulation unit 30, and the common terminal of the multiplexer K2 is connected to one end of the state switching module 20. Preferably, the multiplexer K2 is a 10-channel selection switch. That is, in this embodiment, the number of measurement channels of the multi-channel leak detector simulation device is preferably 10 channels. Moreover, the selection of 10 measurement channels can be achieved by the multiplexer K2, with each measurement channel corresponding to an independent leak detection simulation unit. Taking the CPR1000 unit as an example, the CPR1000 unit core measurement channels are 50, divided into 5 groups of 10 channels each. By configuring an appropriate number of channels, the device in this embodiment can reduce the overall weight of the equipment and improve its portability and handling efficiency.

[0036] It should be noted that this embodiment typically does not require simultaneous simulation of two measurement channels. However, if actual needs require simultaneous simulation of leakage conditions in multiple measurement channels (e.g., two), two multi-channel leakage detector simulation devices of this invention can be used.

[0037] Combination Figure 2 In some embodiments, the state switching module 20 includes a dual-state switch K1 and a resistor network module 201. The dual-state switch K1 includes two selection terminals. The common terminal of the dual-state switch K1 is connected to the common terminal of the multiplexer K2, and the two selection terminals of the dual-state switch K1 are connected to the resistor network module 201. The resistor network module 201 provides a leakage mode and a non-leakage mode by simulating resistance values. The dual-state switch K1 is used to select the leakage mode or the non-leakage mode for the selected leakage detector simulation unit 30 and to achieve mode switching. It can be understood that in this embodiment, the multi-channel leakage detector simulation device achieves mode switching by selecting the leakage mode or the non-leakage mode through the dual-state switch K1.

[0038] Combination Figure 2In some embodiments, the resistor network module 201 includes a first resistor R100 and a second resistor R200. A first end of the first resistor R100 is connected to one selection terminal of the dual-state switch K1, and a first end of the second resistor R200 is connected to the other selection terminal of the dual-state switch K1. The second ends of the first resistor R100 and the second resistor R200 are connected together. The first resistor R100 provides a leakage mode, with a resistance value below a preset threshold. The second resistor R200 provides a non-leakage mode, with a resistance value above the preset threshold. It can be understood that, in one specific embodiment, the resistor network module 201 may consist of a first resistor R100 and a second resistor R200. The resistance value of each measurement channel is switched via the dual-state switch K1 and connected to a relay board to simulate the resistance change of a leakage detector, thereby simulating the corresponding operating mode.

[0039] Specifically, the common terminal formed by connecting the second end of the first resistor R100 and the second end of the second resistor R200 is used to connect the power supply module 40. Under 48V DC power supply conditions, the preset threshold is 80kΩ. In this embodiment, the resistance of the first resistor R100 is 70kΩ, and the resistance of the second resistor R200 is 90kΩ.

[0040] In other words, in this embodiment, the leakage mode corresponds to the first resistor R100 (70kΩ), which simulates the alarm state of the leakage detector when the resistance value is lower than the preset threshold; the non-leakage mode corresponds to the second resistor R200 (90kΩ), which simulates the normal state of the leakage detector.

[0041] In this embodiment, the multi-channel leak detector simulation device switches between leak and non-leak modes via a dual-state switch K1, selects the target channel using a multiplexer switch K2, and simulates the resistance changes of the leak detector using 70kΩ and 90kΩ resistors. This device is simple in structure and low in cost, and can efficiently perform functional testing and fault diagnosis of multi-channel leak detectors, making it particularly suitable for leak detector channel maintenance in nuclear power plant RIC systems.

[0042] like Figure 3 As shown, in the second embodiment of the multi-channel leak detector simulation device of this utility model, the multi-channel leak detector simulation device of this embodiment further includes a power supply module 40. The power supply module 40 is connected to the common terminal of the first resistor R100 and the second resistor R200. Alternatively, the power supply module 40 provides 48V DC power to the simulation device of this utility model.

[0043] The multi-channel leak detector simulation device in this embodiment has the following technical advantages:

[0044] 1. High-efficiency multi-channel testing: Through modular design, a single device supports 10 channels of simulation, expanding to cover actual system requirements. 2. Convenient operation: Dual-switch design enables rapid switching between states and channels, improving testing efficiency. 3. Low cost: Utilizing general-purpose resistors and switching components, maintenance and manufacturing costs are low. 4. High reliability: Resistor values ​​precisely match the actual detector threshold, ensuring accurate test results.

[0045] It should be noted that the focus of this embodiment is not on improving how the leak detector simulation unit simulates the output signal of an actual leak detector. Therefore, the specific implementation of the leak detector simulation unit in simulating the output signal of an actual detector and the structure of the leak detector simulation unit can be found in existing technologies. Optionally, the leak detector simulation unit can be a test box capable of simulating the output signal of an actual detector.

[0046] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A multi-channel leak detector simulation device, characterized in that, It includes a channel selection module (10), a state switching module (20), and multiple leakage detector simulation units (30); the channel selection module (10) includes multiple selection terminals, each selection terminal is connected to one of the leakage detector simulation units (30), the common terminal of the channel selection module (10) is connected to one end of the state switching module (20), and the other end of the state switching module (20) is used to connect to the power supply module; The channel selection module (10) is used to select one of all the leak detector simulation units (30); each leak detector simulation unit (30) is a simulation measurement channel; The state switching module (20) is used to select a leakage mode or a non-leakage mode for the selected leakage detector simulation unit (30); the leakage mode simulates the alarm state of the leakage detector, and the non-leakage mode simulates the normal state of the leakage detector. The leak detector simulation unit (30) is used to simulate and generate output signals similar to those of leak detectors in nuclear power units under different operating modes.

2. The multi-channel leak detector simulation device according to claim 1, characterized in that, The channel selection module (10) includes a multiplexer (K2), each selection terminal of the multiplexer (K2) is connected to a leakage detector simulation unit (30), and the common terminal of the multiplexer (K2) is connected to one end of the state switching module (20).

3. The multi-channel leak detector simulation device according to claim 2, characterized in that, The multiplexer (K2) is a 10-way selector switch.

4. The multi-channel leak detector simulation device according to claim 2, characterized in that, The state switching module (20) includes a dual-state switch (K1) and a resistor network module (201). The dual-state switch (K1) includes two selection terminals. The common terminal of the dual-state switch (K1) is connected to the common terminal of the multiplexer switch (K2), and the two selection terminals of the dual-state switch (K1) are connected to the resistor network module (201). The resistor network module (201) provides leakage mode and non-leakage mode by simulating resistance value; The dual-state switch (K1) is used to select the leakage mode or non-leakage mode for the selected leakage detector simulation unit (30) and to achieve mode switching.

5. The multi-channel leak detector simulation device according to claim 4, characterized in that, The resistor network module (201) includes a first resistor (R100) and a second resistor (R200); the first end of the first resistor (R100) is connected to one of the selection terminals of the dual-state switch (K1), the first end of the second resistor (R200) ​​is connected to the other selection terminal of the dual-state switch (K1), and the second ends of the first resistor (R100) and the second end of the second resistor (R200) ​​are connected together. The first resistor (R100) is used to provide a leakage mode, and its resistance value is lower than a preset threshold. The second resistor (R200) ​​is used to provide a non-leakage mode, and its resistance value is higher than a preset threshold.

6. The multi-channel leak detector simulation device according to claim 5, characterized in that, The common terminal formed by connecting the second end of the first resistor (R100) and the second end of the second resistor (R200) ​​is used to connect the power supply module; under 48V DC power supply conditions, the preset threshold is 80kΩ.

7. The multi-channel leak detector simulation device according to claim 6, characterized in that, The resistance of the first resistor (R100) is 70kΩ.

8. The multi-channel leak detector simulation device according to claim 6, characterized in that, The resistance of the second resistor (R200) ​​is 90kΩ.

9. The multi-channel leak detector simulation device according to claim 1, characterized in that, The multi-channel leak detector simulation device also includes a power supply module (40).

10. The multi-channel leak detector simulation device according to claim 9, characterized in that, The power supply module (40) provides 48V DC power to the simulation device.

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