Analog quantity conditioning board card channel precision testing device of reactor protection system

Abstract

The utility model discloses a channel precision testing device for an analog quantity conditioning board card of a reactor protection system. The channel precision testing device comprises a process calibrator, a signal conditioning case and a wiring group, wherein the signal conditioning case is electrically connected with the process calibrator through the wiring group, an analog quantity conditioning board card slot is formed in the signal conditioning case and is suitable for accommodating an analog quantity conditioning board card, and the wiring group comprises an input wiring and an output wiring. As the test device is provided with the input wiring and the output wiring, the test can be carried out only by dismounting the analog quantity conditioning board card and inserting the analog quantity conditioning board card into the analog quantity conditioning board card slot in the signal conditioning case, and after the test, the input wiring and the output wiring of the analog quantity conditioning board card do not need to be connected back to the case again, so that the test efficiency is greatly improved. Therefore, the time for connecting and disconnecting the wiring can be reduced, the test period can be saved, and the wiring recovery error caused by repeated connecting and disconnecting can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of channel accuracy testing devices, in particular to a channel accuracy testing device for an analog quantity conditioning board card of a reactor protection system. Background Art

[0002] The reactor protection system of the high temperature gas-cooled reactor demonstration project (hereinafter referred to as the reactor protection system) realizes the emergency shutdown function and the dedicated safety facility driving function, and outputs the isolation driving signal of the primary circuit instrument tube.

[0003] The main equipment of the reactor protection system includes signal isolation cabinet, protection logic x cabinet, protection logic y cabinet, channel monitoring cabinet, safety trigger cabinet, etc.

[0004] The signal isolation cabinet realizes the conditioning, isolation and distribution functions of safety-level measurement signals to realize the sharing of measurement signals of safety-level instruments on site. A large number of analog quantity conditioning boards, digital quantity conditioning boards and 24VDC low-voltage power supply modules for the normal operation of the boards are installed in the signal isolation cabinet. Each analog quantity conditioning board can divide the measurement signal of any safety-level instrument on site into 4 mutually isolated and independent measurement signals, and input them into the reactor protection system, post-accident monitoring system and DCS system respectively according to needs.

[0005] The channel accuracy requirement of the analog quantity conditioning board is ≤±0.1%FS. According to the requirements of the unit overhaul, the reactor protection system needs to test the IO channel accuracy of the analog quantity conditioning board during the unit overhaul, and replace the boards whose test results do not meet the accuracy requirements.

[0006] The traditional method for testing the IO channel accuracy of the analog conditioning board of the reactor protection system is to remove the input wiring and output wiring corresponding to the analog conditioning board together, and then connect the input wiring and output wiring of the analog conditioning board to the process calibrator respectively. The input end of the process calibrator sends a standard 4-20mA analog signal. After the analog signal passes through the analog conditioning board, the output end of the process calibrator reads back and records the output values ​​at 4mA, 8mA, 12mA, 16mA, and 20mA respectively, and calculates the accuracy of this channel through the accuracy calculation formula. In this way, it is necessary to repeatedly disconnect the wiring to inject the signal into each channel of each analog conditioning board and read it back. However, there are many analog conditioning boards and channels, so the traditional test method has a very low test efficiency, and repeated disconnection of the wiring is very likely to cause wiring recovery errors.

[0007] In view of the above shortcomings, it is necessary to design a channel accuracy test device for the analog quantity conditioning board of the reactor protection system. Utility Model Content

[0008] Therefore, the technical problem to be solved by the utility model is to use the traditional testing method to test the channel accuracy of the analog quantity conditioning board of the reactor protection system, which is very inefficient and can easily cause wiring recovery errors due to repeated disconnection of the wiring, thereby providing a channel accuracy testing device for the analog quantity conditioning board of the reactor protection system.

[0009] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0010] A reactor protection system analog quantity conditioning board channel accuracy test device comprises a process calibrator, a signal conditioning chassis, and a wiring group; wherein the signal conditioning chassis is electrically connected to the process calibrator via the wiring group, an analog quantity conditioning board slot is provided in the signal conditioning chassis, suitable for accommodating the analog quantity conditioning board, and the wiring group comprises input wiring and output wiring.

[0011] Furthermore, there are multiple analog quantity conditioning board slots and multiple wiring groups, and the multiple analog quantity conditioning board slots and the multiple wiring groups are arranged in a one-to-one corresponding position.

[0012] Furthermore, a conditioning chassis power indicator card is provided in the signal conditioning chassis for indicating whether the power supply of the signal conditioning chassis is normal.

[0013] Furthermore, it also includes a 24VDC power supply module, and the 24VDC power supply module is used to supply power to the signal conditioning chassis.

[0014] Furthermore, it also includes a power cord, one end of which is connected to the process calibrator, and the other end of which is suitable for connecting to an external power source.

[0015] Furthermore, it also includes a filter, which is installed on the power line.

[0016] Furthermore, one end of the 24VDC power supply module is electrically connected to the signal conditioning chassis through a line, and the other end is connected to the power line between the process calibrator and the filter through a line.

[0017] Furthermore, it also includes an air switch installed on the power line, and in the current direction, the air switch is located upstream of the filter.

[0018] Furthermore, it also includes a surge protector installed on the power line, and the surge protector is installed between the air switch and the filter.

[0019] Furthermore, it also includes a movable rack, and the process calibrator, the signal conditioning chassis, the 24VDC power supply module, the air switch, the surge protector and the filter are all installed on the movable rack.

[0020] The technical solution of the utility model has the following advantages:

[0021] 1. The reactor protection system analog quantity conditioning board channel accuracy test device provided by the utility model includes a process calibrator, a signal conditioning chassis, and a wiring group; wherein, the signal conditioning chassis is electrically connected to the process calibrator through the wiring group, and an analog quantity conditioning board slot is provided in the signal conditioning chassis, which is suitable for accommodating the analog quantity conditioning board, and the wiring group includes input wiring and output wiring. Since the test device has its own input wiring and output wiring, during the test process, there is no need to remove the input wiring and output wiring of the analog quantity conditioning board, and then connect the input wiring and output wiring to the process calibrator, and then connect the input wiring and output wiring back to the chassis after the test. When using the test device provided by the utility model, it is only necessary to remove the analog quantity conditioning board and insert it into the analog quantity conditioning board slot in the signal conditioning chassis to carry out the test. After the test, there is no need to reconnect the input wiring and output wiring of the analog quantity conditioning board back to the chassis. Therefore, it can reduce the time occupied by disconnecting and connecting the wiring, thereby saving the test period, and avoid the wiring recovery errors caused by repeated disconnection and connection.

[0022] 2. The reactor protection system analog quantity conditioning board channel accuracy test device provided by the utility model has multiple analog quantity conditioning board slots and multiple wiring groups. The multiple analog quantity conditioning board slots and the multiple wiring groups are arranged in a one-to-one correspondence. In this way, batch centralized testing of analog quantity conditioning board IO channels can be achieved, thereby improving testing efficiency and saving testing time.

[0023] 3. The reactor protection system analog quantity conditioning board channel accuracy test device provided by the utility model also includes a movable rack, and the process calibrator, signal conditioning chassis, 24VDC power supply module, air switch, surge protector and filter are all installed on the movable rack. In this way, the integration level of the test device can be improved and the movement of the test device can be facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a channel accuracy testing device for an analog quantity conditioning board of a reactor protection system in an embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1. Rack; 11. Universal wheel; 3. Signal conditioning chassis; 31. Conditioning chassis power indicator board; 32. Analog conditioning board slot; 4. Wiring group; 41. Input wiring; 42. Output wiring; 5. Process calibrator; 6. Power cord; 7. Air switch; 8. Surge protector; 9. Filter; 10. 24VDC power module. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] like Figure 1 As shown, the utility model provides a reactor protection system analog quantity conditioning board channel accuracy test device (hereinafter referred to as the test device). The test device integrates a signal conditioning chassis 3, a process calibrator 5, an air switch 7, a surge protector 8, a filter 9, and a 24VDC power module 10 and other equipment through a movable frame 1.

[0033] The movable frame 1 is arranged vertically, and a universal wheel 11 is provided at the bottom so as to move the testing device to a target position as required.

[0034] The signal conditioning chassis 3 is mounted on the rack 1. A conditioning chassis power indicator card 31 is provided in the signal conditioning chassis 3. The conditioning chassis power indicator card 31 is used to indicate whether the power supply of the signal conditioning chassis 3 is normal, so as to ensure that the power supply always remains normal during the test of the analog quantity conditioning card, and avoid test deviation caused by abnormal power supply.

[0035] The signal conditioning chassis 3 is also provided with an analog quantity conditioning template slot 32. In the present embodiment, the number of the analog quantity conditioning template slots 32 is 8. The back side of the analog quantity conditioning board slot 32 (the back side is the side facing the rack 1) is formed with an input terminal and an output terminal. Of course, the number of the analog quantity conditioning template slots 32 may also be 2, 3, 9 or other values, which are not specifically limited here and can be set according to actual needs. The input terminal and the output terminal on the back side of each analog quantity conditioning board slot 32 are connected through a wiring group 4 (a wiring group such as Figure 1 The wiring group 4 includes input wiring 41 and output wiring 42. In the same wiring group 4, there are two input wirings 41, corresponding to the positive and negative poles respectively; there are also two output wirings 42, corresponding to the positive and negative poles respectively.

[0036] The external 220VAC mains electricity passes through the air switch 7, surge protector 8, and filter 9 along the power cord 6 to provide power for the desktop process calibrator 5. In the current direction, the air switch 7 is located upstream, the filter 9 is located downstream, and the surge protector 8 is located between the air switch 7 and the filter 9. The main function of the filter 9 is to provide clean power to the test device by reducing the interference of clutter signals and low-frequency voltage changes to ensure the normal and stable operation of the test device. The surge protector 8 provides transient overvoltage protection for the power supply and distribution system, which can effectively suppress the induced overvoltage caused by lightning and the system operation overvoltage, and protect the safety of the test device.

[0037] One end of the 24VDC power module 10 is connected to the signal conditioning chassis 3 through a line, and the other end is connected to the power line 6 between the filter 9 and the process calibrator 5 through a line. The 24VDC power module 10 is used to convert the 220VAC power supply into a 24VDC power supply, and the 24VDC power supply supplies power to the signal conditioning chassis 3.

[0038] The following describes the process of testing using the reactor protection system analog quantity conditioning board channel accuracy testing device in the utility model:

[0039] Connect the test device to an external power source;

[0040] Pull out the eight analog quantity conditioning boards to be tested from the on-site cabinet and insert them into the eight analog quantity conditioning board slots 32 respectively;

[0041] After powering on the test device through the air switch 7 and confirming that the signal conditioning chassis 3 and the process calibrator 5 are powered on normally, according to the functional requirement of "power supply to the signal recipient" of the analog conditioning board, set each output end of the process calibrator 5 to inject a passive 4mA-20mA (specifically, different current values ​​of 4mA, 8mA, 31mA, 16mA, and 20mA) standard signal into the input end of the corresponding analog conditioning board to be tested. At the same time, set the process calibrator 5 to provide power for the signal output circuit of the corresponding analog conditioning board, and read back the signal. Specifically, read back and record the measured value of the above current value, and then bring the recorded measured value into the accuracy calculation formula to calculate whether the accuracy value of each channel meets the requirements.

[0042] From the above test process, it can be seen that since the wiring group 4 is a part of the test device, it is self-contained by the test device. Therefore, during the test process, there is no need to remove the input wiring and output wiring of the analog quantity conditioning board in the field cabinet, and then connect the input wiring and output wiring to the process calibrator, and then connect the input wiring and output wiring back to the field cabinet after the test as in the traditional test method. When using the test device provided by the utility model, it is only necessary to remove the analog quantity conditioning board and insert it into the analog quantity conditioning board slot 32 in the signal conditioning chassis 3 to perform the test. After the test, there is no need to reconnect the input wiring and output wiring of the analog quantity conditioning board back to the field cabinet. Therefore, it can reduce the time taken by disconnecting the wiring, thereby saving the test period, and avoid wiring recovery errors caused by repeated disconnection of the wiring.

[0043] In addition, since there are multiple analog quantity conditioning board slots 32 in the signal conditioning chassis 3, batch centralized testing of analog quantity conditioning board IO channels can be achieved, thereby improving testing efficiency and saving testing time.

[0044] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A reactor protection system analog quantity conditioning board channel accuracy test device, characterized in that: The invention comprises a process calibrator (5), a signal conditioning chassis (3), and a wiring group (4); wherein the signal conditioning chassis (3) is electrically connected to the process calibrator (5) via the wiring group (4); an analog quantity conditioning board slot (32) is provided in the signal conditioning chassis (3) and is suitable for accommodating an analog quantity conditioning board; and the wiring group (4) comprises an input wiring (41) and an output wiring (42).

2. The reactor protection system analog quantity conditioning board channel accuracy test device according to claim 1, characterized in that: The number of the analog quantity conditioning board slots (32) is multiple, and the number of the wiring groups (4) is also multiple. The multiple analog quantity conditioning board slots (32) and the multiple wiring groups (4) are arranged in a one-to-one positional correspondence.

3. The reactor protection system analog quantity conditioning board channel accuracy test device according to claim 1, characterized in that: The signal conditioning chassis (3) is provided with a conditioning chassis power indication board (31) for indicating whether the power supply of the signal conditioning chassis (3) is normal.

4. The reactor protection system analog quantity conditioning board channel accuracy test device according to any one of claims 1 to 3, characterized in that: It also includes a 24VDC power supply module (10), and the 24VDC power supply module (10) is used to supply power to the signal conditioning chassis (3).

5. The reactor protection system analog quantity conditioning board channel accuracy test device according to claim 4, characterized in that: It also includes a power cord (6), one end of which is connected to the process calibrator (5), and the other end of which is suitable for connecting to an external power source.

6. The reactor protection system analog quantity conditioning board channel accuracy test device according to claim 5, characterized in that: It also comprises a filter (9), wherein the filter (9) is installed on the power line (6).

7. The reactor protection system analog quantity conditioning board channel accuracy test device according to claim 6, characterized in that: One end of the 24VDC power module (10) is electrically connected to the signal conditioning chassis (3) through a line, and the other end is connected to the power line (6) between the process calibrator (5) and the filter (9) through a line.

8. The reactor protection system analog quantity conditioning board channel accuracy test device according to claim 7, characterized in that: It also includes an air switch (7) installed on the power line (6); in the current direction, the air switch (7) is located upstream of the filter (9).

9. The reactor protection system analog quantity conditioning board channel accuracy test device according to claim 8, characterized in that: It also includes a surge protector (8) installed on the power line (6), and the surge protector (8) is installed between the air switch (7) and the filter (9).

10. The reactor protection system analog quantity conditioning board channel accuracy test device according to claim 9, characterized in that: It also includes a movable rack (1), on which the process calibrator (5), the signal conditioning chassis (3), the air switch (7), the surge protector (8), the filter (9), and the 24VDC power supply module (10) are all installed.

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