A signal switching device

Abstract

The utility model relates to a signal switching device, including the casing, be equipped with the interface board in the casing, the interface board is used for the inside of casing is divided, forms the first space and the second space, the first space is equipped with main control module and the first heat dissipation module, main control module is used for output switching instruction, the first heat dissipation module is used for when the device runs makes the hot air in the first space with the outside cold air exchange, the inside of second space is equipped with a plurality of signal switching module and the second heat dissipation module, every signal switching module includes control end, N input and M output, the second heat dissipation module is used for when the device runs makes the hot air in the second space with the outside cold air exchange, input is used for receiving simulation signal, output is used for output test signal, signal switching module is used for receiving switching instruction and according to switching instruction control the connection between each input and each output relation, the utility model discloses the volume is smaller, supports multiple signal switching, and realizes multiple types of signal switching.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power plant technology, and in particular to a signal switching device. Background Technology

[0002] Nuclear power plants need to periodically test the functionality of certain equipment. During these tests, simulated signals must be input into the tested equipment to complete the experiment, thus requiring signal switching devices. However, the signal switching capabilities of the devices used in nuclear power plants are limited. They typically only support switching between a single type or a specific range of simulated signals, failing to flexibly adapt to the switching needs of multiple simulated signals. Since some equipment tests involve a wide variety of signals, multiple signal switching devices may be needed to meet the requirements. However, multiple signal switching devices result in a large overall device size and cumbersome operation, leading to low testing efficiency, potential delays, and ultimately, compromised nuclear power plant safety. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a signal switching device.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a signal switching device, including a housing, wherein an interface board is provided inside the housing, and the interface board is used to divide the interior of the housing to form a first space and a second space;

[0005] The first space is equipped with a main control module and a first heat dissipation module. The main control module is electrically connected to the interface board. The main control module is used to output switching commands. The first heat dissipation module is used to exchange hot air in the first space with cold air outside when the device is running.

[0006] The second space is equipped with multiple signal switching modules and a second heat dissipation module. Each signal switching module includes a control terminal, N input terminals and M output terminals, where N and M are natural numbers greater than 1. The second heat dissipation module is used to exchange hot air in the second space with cold air outside during device operation.

[0007] The control terminal of each signal switching module is electrically connected to the interface board. The input terminal is used to receive simulation signals, and the output terminal is used to output test signals. Each signal switching module is used to receive the switching command and control the connection relationship between each input terminal and each output terminal according to the switching command.

[0008] Preferably, each of the signal switching modules further includes N switch groups, and each switch group includes M switches;

[0009] In each of the switch groups, the first terminals of each switch are electrically connected to form an input node, and the second terminals of each switch are electrically connected one-to-one to the M output terminals of the corresponding signal switching module. The control terminals of each switch are electrically connected to the main control module through the interface board.

[0010] Each of the switch groups has its input nodes electrically connected one-to-one to the N input terminals of the corresponding signal switching module.

[0011] Preferably, the housing includes a first side plate, a second side plate, a third side plate, a fourth side plate opposite to the first side plate, a fifth side plate opposite to the second side plate, and a sixth side plate opposite to the third side plate, and the interface plate is parallel to the first side plate and the fourth side plate.

[0012] Preferably, the N input terminals and M output terminals of each of the signal switching modules are all located on the fourth side plate.

[0013] Preferably, the fourth side plate is provided with a plurality of aviation connectors corresponding one-to-one with each of the signal switching modules, and each input terminal and each output terminal of each signal switching module is electrically connected to the corresponding aviation connector.

[0014] Preferably, the aviation connector is a multi-core aviation connector, and each input terminal and each output terminal of the signal switching module is electrically connected to the corresponding wire core of the aviation connector.

[0015] Preferably, the second side plate and the fifth side plate are respectively provided with a first heat dissipation grille as an air inlet for the first space on the area opposite to the first space. The first heat dissipation module includes a plurality of first fans. Each first fan is close to the first side plate and is evenly distributed on the third side plate and the sixth side plate. When each first fan is working, it draws the hot air in the first space to the outside.

[0016] The third side plate and the sixth side plate are respectively provided with second heat dissipation grilles as air inlets for the second space in the areas opposite to the second space. The second heat dissipation module includes multiple second fans. Each second fan is close to the fourth side plate and is evenly distributed on the second side plate and the fifth side plate. When each second fan is working, it draws the hot air in the second space to the outside.

[0017] Preferably, each of the signal switching modules further includes a second circuit board for carrying each of the switch groups, the second circuit board being perpendicular to the second side plate and the fourth side plate.

[0018] Preferably, the number of signal switching modules is 7; and / or

[0019] The number of the first fans is 4; and / or

[0020] The number of the second fan is 6.

[0021] Preferably, the signal switching device further includes a power supply module, which is electrically connected to the main control module, the first heat dissipation module, the second heat dissipation module and each of the signal switching modules.

[0022] Compared with traditional signal switching devices, this invention not only reduces the size of the device, making it easier to transport and operate on-site, but also supports the switching of multiple signals and realizes various types of signal switching. The device also has the advantages of high compatibility and strong flexibility, which helps to expand the application scenarios of the device. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the signal switching device in one embodiment of the present invention;

[0025] Figure 2 yes Figure 1 A structural diagram from the first angle;

[0026] Figure 3 yes Figure 1 A structural diagram from a second angle;

[0027] Figure 4 yes Figure 1 A structural diagram from a third angle;

[0028] Figure 5 This is a circuit diagram of the signal switching module in one embodiment of the present invention;

[0029] Figure 6 This is a circuit structure block diagram of a signal switching device in one embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] Housing 1; First side plate 11; Second side plate 12; First heat dissipation grille 121; Third side plate 13; Second heat dissipation grille 131; Fourth side plate 14; Fifth side plate 15; Sixth side plate 16; Interface board 2; First space 3; Second space 4; Main control module 5; First heat dissipation module 6; First fan 61; Signal switching module 7; Switch group 71; Second circuit board 72; Second heat dissipation module 8; Second fan 81; Power supply module 9. Detailed Implementation

[0032] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0033] In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "up," "down," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Figure 1 This is a schematic diagram of the signal switching device in one embodiment of the present invention. Please refer to [link / reference]. Figure 1 The signal switching device may include a housing 1, and an interface board 2 is provided inside the housing 1. The interface board 2 is used to divide the interior of the housing 1 to form a first space 3 and a second space 4.

[0035] Please see Figure 1 and Figure 6 The first space 3 is equipped with a main control module 5 and a first heat dissipation module 6. The main control module 5 is electrically connected to the interface board 2 and is used to output switching commands. The first heat dissipation module 6 is used to exchange hot air in the first space 3 with cold air from the outside during device operation. It should be noted that the outside refers to the external space of the casing 1.

[0036] The second space 4 contains multiple signal switching modules 7 and a second heat dissipation module 8. Each signal switching module 7 includes a control terminal (not shown), N input terminals (not shown), and M output terminals (not shown), where N and M are natural numbers greater than 1. The second heat dissipation module 8 is used to exchange hot air inside the second space 4 with cold air from the outside during device operation.

[0037] Please see Figure 1 and Figure 6 The control terminal of each signal switching module 7 is electrically connected to the interface board 2. The input terminal of each signal switching module 7 is used to receive simulation signals, the output terminal of each signal switching module 7 is used to output test signals, and each signal switching module 7 is used to receive switching commands and control the connection relationship between each input terminal and each output terminal according to the switching commands.

[0038] It should be noted that each input terminal of the signal switching module 7 can be connected to a corresponding simulation signal, and each output terminal of the signal switching module 7 can output any one of the simulation signals connected to the signal switching module 7. For example, the signal switching module 7 includes 4 input terminals (including I1, I2, I3, I4) and 3 output terminals (including O1, O2, O3, O4). Under the control of the main control module 5, the signal switching module 7 can connect input terminal I1 to output terminal O2, input terminal I2 to output terminal O1, input terminal I3 to output terminal O3, and input terminal I4 to output terminal O4. Of course, it can also connect input terminal I1 to output terminal O3, input terminal I3 to output terminal O1, input terminal I4 to output terminal O2, and input terminal I2 to output terminal O4. The specific connection relationship is determined by the received switching command.

[0039] This embodiment sets up multiple signal switching modules 7, enabling the signal switching device to simultaneously receive multiple simulated signals and output multiple simulated signals to the corresponding target signal receiving end through multiple output terminals according to the test requirements, thereby implementing equipment testing. For example, taking the verification of whether the four main pump speed measurement channels are abnormal as an example, during the test, the four output terminals of the signal switching module 7 need to input speed simulation signals to the four main pump speed measurement channels. Since each channel needs to be measured sequentially, when testing the first main pump speed measurement channel, normal speed simulation signals (signal values ​​within the normal range) can be input to the second to fourth main pump speed measurement channels through three input terminals, and then a fault speed simulation signal can be input to the first main pump speed measurement channel through one input terminal, thus completing the test of the first main pump speed measurement channel; when it is necessary to measure the second main pump speed measurement channel, the fault speed simulation signal is switched to the second main pump speed measurement channel, while the normal speed simulation signal originally input to the second main pump speed measurement channel is switched to the first main pump speed measurement channel.

[0040] This invention arranges multiple signal switching modules 7 within the second space 4, which helps to reduce the size of the signal switching device. However, the reduced size leads to decreased heat dissipation efficiency. Therefore, a second heat dissipation module 8 is also provided to improve the heat dissipation efficiency of each signal switching module 7. Since the main control module 5 may need to control the operation of multiple signal switching modules 7 simultaneously, resulting in high power consumption, a first heat dissipation module 6 is also provided to improve the heat dissipation efficiency of the first space 3 in order to prevent the main control module 5 from overheating.

[0041] It should be noted that the interface board 2 not only serves as the interior of the housing 1, but also as the medium for the main control module 5 to achieve electrical connection with each signal switching module 7. The purpose of separating the main control module 5 from each signal switching module 7 is twofold: firstly, since the operating voltages of the main control module 5 and the signal switching modules 7 are different, separation can achieve electrical isolation; secondly, when a large number of signal switching modules 7 are running, the temperature of the second space 4 is significantly higher than the temperature of the first space 3, and separation can achieve isolation between spaces with different temperatures, thus preventing the main control module 5 from overheating.

[0042] In one embodiment, the interface board 2 may include a first circuit board, the side of the first circuit board facing the first space 3 having a first interface for electrical connection with the main control module 5, and the side of the first circuit board facing the second space 4 having a plurality of second interfaces for one-to-one electrical connection with each signal switching module 7.

[0043] Figure 5 This is a circuit diagram of the signal switching module in one embodiment of this utility model. Please refer to [link / reference]. Figure 5 Each signal switching module 7 may also include N switch groups 71, and each switch group 71 includes M switches. The N input terminals correspond to IN_1, IN_2, ..., IN_N, and the M output terminals correspond to OUT_1, OUT_2, ..., OUT_M.

[0044] In each switch group 71, the first terminals of each switch are electrically connected to form an input node J. The second terminal of each switch is electrically connected one-to-one to the M output terminals of the corresponding signal switching module 7. The control terminal of each switch is electrically connected to the main control module 5 through the interface board 2. The input node J of each switch group 71 is electrically connected one-to-one to the N input terminals of the corresponding signal switching module 7.

[0045] Please see Figure 5 The working principle of the signal switching module 7 is as follows: Taking the input terminal IN_1 as an example, when it is necessary to connect the input terminal IN_1 and the output terminal OUT_X (X is a natural number, and 1≤X≤M), the Xth switch KX can be turned on by the main control module 5.

[0046] Preferably, each switch may include a relay. Specifically, one end of the relay's excitation coil is connected to a power supply, and the other end of the relay's excitation coil corresponds to the control terminal of the switch, thereby achieving electrical connection with the main control module 5. The moving contact of the relay corresponds to the first terminal of the switch, and the normally open contact of the relay corresponds to the second terminal of the switch. Of course, other electronic switching components can be used instead of relays, but using relays has the following advantages: the conduction impedance after the switch is closed is small, which can minimize the impact on the simulation signal flowing through its conduction circuit, thus helping to improve the accuracy of the test. In addition, in this embodiment, each input port and each output port can transmit bidirectionally, enabling this invention to test some bidirectional transmission channels.

[0047] Optionally, the number of signal switching modules 7 can be 7.

[0048] Figure 2 yes Figure 1 A structural diagram from the first angle. Figure 3 yes Figure 1 A structural diagram from a second angle. Please refer to [link / reference]. Figures 1 to 3 The housing 1 may include a first side plate 11, a second side plate 12, a third side plate 13, a fourth side plate 14 opposite to the first side plate 11, a fifth side plate 15 opposite to the second side plate 12, and a sixth side plate 16 opposite to the third side plate 13. The interface plate 2 is parallel to the first side plate 11 and the fourth side plate 14. Specifically, in this embodiment, the housing 1 is rectangular, and the interface plate 2 can divide the interior of the housing 1 into two rectangular spaces to form the first space 3 and the second space 4.

[0049] In one embodiment, the N input terminals and M output terminals of each signal switching module 7 are all located on the fourth side plate 14 to facilitate the disconnection and reconnection of each input terminal and output terminal by the staff.

[0050] In one embodiment, see Figure 2The fourth side plate 14 is provided with multiple aviation connectors 141 corresponding to each signal switching module 7. Each input and output terminal of each signal switching module 7 is electrically connected to its corresponding aviation connector 141. Specifically, the number of aviation connectors 141 is the same as the number of signal switching modules 7. The aviation connectors 141 can be existing multi-core aviation connectors. Each input and output terminal of each signal switching module 7 is electrically connected to the corresponding wire core of the aviation connector 141. In this embodiment, since the test items during the overhaul are basically predetermined, the staff can pre-connect some required simulation signal output ports and some test channel interfaces to the wire cores of the aviation connector based on the needs. In this way, by inserting the aviation connector into the corresponding aviation connector 141, multiple input terminals can be connected to multiple simulation signal output ports and multiple output terminals can be connected to multiple test channel interfaces, which is very convenient. Moreover, the aviation connector 141 has the advantage of high reliability.

[0051] In one embodiment, see Figure 2 and Figure 3 The second side plate 12 and the fifth side plate 15 are respectively provided with first heat dissipation grilles 121 on the areas opposite to the first space 3. The first heat dissipation grilles 121 serve as air inlets for heat dissipation in the first space 3. The first heat dissipation module 6 may include multiple first fans 61, please refer to [link to relevant documentation]. Figure 1 and Figure 3 Each first fan 61 is positioned close to the first side plate 11, and each first fan 61 is evenly distributed on the third side plate 13 and the sixth side plate 16. When each first fan 61 is working, it draws the hot air in the first space 3 to the outside.

[0052] Optionally, the number of first fans 61 can be four, correspondingly, such as Figure 1 and Figure 3 As shown, two first fans 61 are provided on each of the third side plate 13 and the sixth side plate 16.

[0053] In one embodiment, see Figure 2 and Figure 3 The third side plate 13 and the sixth side plate 16 are respectively provided with second heat dissipation grilles 131 on the areas opposite to the second space 4. The second heat dissipation grilles 131 serve as air inlets for heat dissipation in the second space 4. Furthermore, the second heat dissipation module 8 includes multiple second fans 81. Each second fan 81 is close to the fourth side plate 14 and is evenly distributed on the second side plate 12 and the fifth side plate 15. When each second fan 81 is working, it draws hot air from the second space 4 to the outside.

[0054] Optionally, the number of second fans 81 can be 6, correspondingly, such as Figure 1 and Figure 3As shown, three second fans 81 are provided on each of the second side plate 12 and the fifth side plate 15.

[0055] In order to prevent foreign objects such as dust and moisture from entering the first space 3 and the second space 4, in one embodiment, the two first heat dissipation grilles 121 and the two second heat dissipation grilles 131 are respectively provided with existing waterproof and dustproof filters.

[0056] Figure 4 yes Figure 1 A structural diagram from a third-angle perspective. In one embodiment, such as... Figure 4 As shown, each signal switching module 7 may also include a second circuit board 72 for carrying each switch group 71. The second circuit board 72 is perpendicular to the second side plate 12 and the fourth side plate 14, so as to significantly increase the contact area between the airflow of the second fan 81 and the two sides of the second circuit board 72 when the fan 81 is drawing air, thereby improving the heat dissipation efficiency.

[0057] In one embodiment, the main control module 5 may include a PLC controller. The PLC controller can execute an existing computer program to control whether each relay in each signal switching module 7 is energized, thereby realizing signal switching.

[0058] Figure 6 This is a circuit structure block diagram of a signal switching device in one embodiment of the present invention. In one embodiment, such as... Figure 6 As shown, the signal switching device may further include a power supply module 9, which is electrically connected to the main control module 5, the first heat dissipation module 6, the second heat dissipation module 8, and each signal switching module 7. Specifically, the power supply module 9 may be located in a local power distribution panel and draw power from the power distribution panel. The power supply module 9 may include several AC-DC power modules (such as existing switching power supplies) that can provide corresponding power according to the power supply requirements of the main control module 5, the first heat dissipation module 6, the second heat dissipation module 8, and each signal switching module 7. For example, in some embodiments, the operating voltage of the PLC controller of the main control module 5 is 24V, and the operating voltage of the fans in the first heat dissipation module 6 and the second heat dissipation module 8 is 28V. In this case, the power supply module 9 shall include at least a 24V AC-DC power module and a 28V AC-DC power module.

[0059] Compared with traditional signal switching devices, this invention not only reduces the size of the device, making it easier to transport and operate on-site, but also supports the switching of multiple signals and realizes various types of signal switching. The device also has the advantages of high compatibility and strong flexibility, which helps to expand the application scenarios of the device.

[0060] 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 signal switching device, characterized in that, Includes a housing (1), and an interface plate (2) is provided inside the housing (1). The interface plate (2) is used to divide the interior of the housing (1) to form a first space (3) and a second space (4). The first space (3) is provided with a main control module (5) and a first heat dissipation module (6). The main control module (5) is electrically connected to the interface board (2). The main control module (5) is used to output switching commands. The first heat dissipation module (6) is used to exchange hot air in the first space (3) with cold air outside when the device is running. The second space (4) is equipped with multiple signal switching modules (7) and a second heat dissipation module (8). Each signal switching module (7) includes a control terminal, N input terminals and M output terminals, where N and M are natural numbers greater than 1. The second heat dissipation module (8) is used to exchange hot air in the second space (4) with cold air outside during device operation. The control terminal of each signal switching module (7) is electrically connected to the interface board (2). The input terminal is used to receive simulation signals, and the output terminal is used to output test signals. Each signal switching module (7) is used to receive the switching command and control the connection relationship between each input terminal and each output terminal according to the switching command.

2. The signal switching device according to claim 1, characterized in that, Each of the signal switching modules (7) further includes N switch groups (71), and each switch group (71) includes M switches; In each of the switch groups (71), after the first end of each switch is electrically connected, an input node is formed. The second end of each switch is electrically connected one-to-one to the M output ends of the corresponding signal switching module (7). The control end of each switch is electrically connected to the main control module (5) through the interface board (2). Each of the switch groups (71) has its input nodes electrically connected one-to-one to the N input terminals of the corresponding signal switching module (7).

3. The signal switching device according to claim 2, characterized in that, The housing (1) includes a first side plate (11), a second side plate (12), a third side plate (13), a fourth side plate (14) opposite to the first side plate (11), a fifth side plate (15) opposite to the second side plate (12), and a sixth side plate (16) opposite to the third side plate (13). The interface plate (2) is parallel to the first side plate (11) and the fourth side plate (14).

4. The signal switching device according to claim 3, characterized in that, The N input terminals and M output terminals of each of the signal switching modules (7) are all located on the fourth side plate (14).

5. The signal switching device according to claim 4, characterized in that, The fourth side plate (14) is provided with a plurality of aviation connectors (141) corresponding to each of the signal switching modules (7). Each input terminal and each output terminal of each signal switching module (7) is electrically connected to the corresponding aviation connector (141).

6. The signal switching device according to claim 5, characterized in that, The aviation connector (141) is a multi-core aviation connector, and each input terminal and each output terminal of the signal switching module (7) is electrically connected to each core of the corresponding aviation connector (141).

7. The signal switching device according to claim 4, characterized in that, The second side plate (12) and the fifth side plate (15) are respectively provided with a first heat dissipation grille (121) as the air inlet of the first space (3) on the area opposite to the first space (3). The first heat dissipation module (6) includes a plurality of first fans (61). Each first fan (61) is close to the first side plate (11) and is evenly distributed on the third side plate (13) and the sixth side plate (16). When each first fan (61) is working, it draws the hot air in the first space (3) to the outside. The third side plate (13) and the sixth side plate (16) are respectively provided with second heat dissipation grilles (131) as air inlets of the second space (4) in the areas opposite to the second space (4). The second heat dissipation module (8) includes a plurality of second fans (81). Each second fan (81) is close to the fourth side plate (14) and is evenly distributed on the second side plate (12) and the fifth side plate (15). When each second fan (81) is working, it draws the hot air in the second space (4) to the outside.

8. The signal switching device according to claim 7, characterized in that, Each of the signal switching modules (7) further includes a second circuit board (72) for carrying each of the switch groups (71), the second circuit board (72) being perpendicular to the second side plate (12) and the fourth side plate (14).

9. The signal switching device according to claim 8, characterized in that, The number of signal switching modules (7) is 7; and / or The number of the first fan (61) is 4; and / or The number of the second fan (81) is 6.

10. The signal switching device according to any one of claims 1 to 9, characterized in that, The signal switching device further includes a power supply module (9), which is electrically connected to the main control module (5), the first heat dissipation module (6), the second heat dissipation module (8) and each of the signal switching modules (7).

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