Potential acquisition instrument for nuclear power plant
By designing a potential acquisition instrument for nuclear power plants, and using a reference electrode, self-corrosion test piece, polarization test piece, and ER probe to monitor the working environment of the drum-shaped rotating filter screen in nuclear power plants, the problem of filter screen monitoring in nuclear power plants has been solved, and the stability of the equipment and the operational safety of nuclear power units have been improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANGJIANG NUCLEAR POWER
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-24
AI Technical Summary
In nuclear power plants, monitoring the working environment of the rotary drum filter is difficult, affecting the safety and stability of the equipment.
Design a nuclear power plant potential acquisition instrument, including a reference electrode, a self-corroding test piece, a polarization test piece, an ER probe, and a circuit board. It is connected to the nuclear power plant's drum-shaped rotating filter through an energized potential wire to acquire potential and resistance (ER) data for monitoring the filter's working environment.
It achieves effective cathodic protection for the drum-type rotating filter screen of nuclear power plants, improves the working stability of the equipment, ensures the operational stability of nuclear power units, and supports rapid magnetic installation.
Smart Images
Figure CN224163615U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nuclear power technology, and in particular to a potential acquisition instrument for nuclear power plants. Background Technology
[0002] During the operation of a nuclear power plant, the rotary drum filter, as a critical water treatment device, is responsible for filtering solid impurities from the cooling water to ensure the normal operation of the system and the safety of the equipment. Because the cooling system of a nuclear power plant needs to operate continuously in an environment of high temperature, high pressure, and strong radiation, the performance of the rotary drum filter directly affects the operational safety of the entire nuclear power plant. Therefore, monitoring the working environment of the rotary drum filter is particularly important. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a potential acquisition instrument for nuclear power plants to solve the problem of monitoring the working environment of the drum-shaped rotating filter screen in nuclear power plants.
[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a nuclear power plant potential acquisition instrument, including a shell, the shell being provided with a reference electrode, a self-corroding test piece, a polarization test piece and an ER probe, and the shell being provided with a circuit board connected to the reference electrode, the self-corroding test piece, the polarization test piece, the reference electrode and the ER probe.
[0005] The nuclear power plant potential acquisition instrument also includes several energized potential wires. One end of each energized potential wire passes through the outer casing to connect to the circuit board, and the other end of each energized potential wire is connected to the nuclear power plant drum-shaped rotating filter through a fixing plate.
[0006] The bottom of the outer shell is also provided with a magnetic holder for magnetically attaching to the drum-shaped rotating filter screen in the nuclear power plant.
[0007] In some embodiments, the nuclear power plant potential acquisition instrument further includes a water immersion sensor mounted on the housing and connected to the circuit board.
[0008] In some embodiments, the bottom of the housing is provided with an anti-slip pad.
[0009] In some embodiments, the housing includes a detachably connected upper housing and a lower housing;
[0010] The upper housing has a first mounting groove and a second mounting groove arranged opposite to each other. The first mounting groove is provided with a first mounting part for mounting a reference electrode, a second mounting part for mounting a self-corrosion test piece, a third mounting part for mounting a polarization test piece, and a fourth mounting part for mounting an ER probe.
[0011] The circuit board is mounted in the second mounting slot.
[0012] In some embodiments, the bottom wall of the first mounting groove is provided with a first wire passage hole, a second wire passage hole, a third wire passage hole and a fourth wire passage hole. The first wire passage hole is used for the cable of the reference electrode to pass through, the second wire passage hole is used for the cable of the self-corrosion test piece to pass through, the third wire passage hole is used for the cable of the polarization test piece to pass through, and the fourth wire passage hole is used for the cable of the ER probe to pass through.
[0013] In some embodiments, the top wall of the second mounting groove is provided with a plurality of mounting posts, and the circuit board is detachably connected to the mounting posts.
[0014] In some embodiments, the upper housing is further provided with a third mounting slot, which is disposed adjacent to the second mounting slot, and a battery connected to the circuit board is disposed in the third mounting slot.
[0015] In some embodiments, a first sealing groove is provided along the lower edge of the upper housing, and a sealing gasket is provided in the first sealing groove.
[0016] In some embodiments, a second sealing groove is provided along the lower edge of the upper housing, and sealant is provided in the second sealing groove.
[0017] In some embodiments, the lower housing has a cylindrical structure, and the magnetic base is detachably connected to the inner bottom wall of the lower housing.
[0018] The present invention offers the following advantages: The nuclear power plant potential acquisition instrument includes a housing containing a reference electrode, a self-corroding test piece, a polarization test piece, and an ER probe. Inside the housing is a circuit board connected to the reference electrode, self-corroding test piece, polarization test piece, and ER probe. The instrument also includes several energized potential wires, one end of which passes through the housing to connect to the circuit board, and the other end of which is connected to the nuclear power plant's drum-shaped rotating filter via a fixing plate. A magnetic holder for magnetically attaching to the drum-shaped rotating filter is also provided at the bottom of the housing. This nuclear power plant potential acquisition instrument can be used to collect data on energized potential, self-corroding test piece potential, reference electrode potential, polarization test piece potential, and resistance (ER) to detect the working environment data of the nuclear power plant's drum-shaped rotating filter. This facilitates effective cathodic protection of the filter, improving its operational stability and thus ensuring the stability of the nuclear power unit's operation. Furthermore, the magnetic holder allows for rapid magnetic installation of the nuclear power plant potential acquisition instrument. Attached Figure Description
[0019] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:
[0020] Figure 1 This is a schematic diagram of the structure of a nuclear power plant potential acquisition instrument installed on a drum-shaped rotating filter screen in some embodiments of this utility model;
[0021] Figure 2 This is a cross-sectional view of a nuclear power plant potential acquisition device in some embodiments of this utility model;
[0022] Figure 3 This is a partial structural schematic diagram of a nuclear power plant potential acquisition instrument in some embodiments of this utility model;
[0023] Figure 4 This is an exploded view of a nuclear power plant potential acquisition instrument in some embodiments of this utility model;
[0024] Figure 5 This is one of the structural schematic diagrams of the upper shell in some embodiments of this utility model;
[0025] Figure 6 This is the second schematic diagram of the upper shell structure in some embodiments of this utility model;
[0026] Figure 7 This is a schematic diagram of the lower shell structure in some embodiments of this utility model. Detailed Implementation
[0027] 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. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "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.
[0028] It should also 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; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0029] 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.
[0030] See Figures 1 to 7 This utility model discloses a nuclear power plant potential acquisition instrument, which can be installed on the rotating frame of the nuclear power plant's drum-type rotary filter, such as on the channel steel 100 of the rotating frame. The nuclear power plant potential acquisition instrument helps in the effective monitoring of the nuclear power plant's drum-type rotary filter cathodic protection system, timely detection and handling of potential problems, ensuring the safe operation of nuclear power plant equipment, and thus making a positive contribution to the plant's productivity.
[0031] The nuclear power plant potential acquisition instrument may include a housing 10, which is equipped with a detection component 20. For example, the housing 10 may include a reference electrode 21, a self-corroding test piece 22, a polarization test piece 23, and an ER probe 24. Inside the housing 10, there is a circuit board 30 connected to the reference electrode 21, the self-corroding test piece 22, the polarization test piece 23, and the ER probe 24. Furthermore, the reference electrode 21, the self-corroding test piece 22, the polarization test piece 23, and the ER probe 24 are exposed on the upper surface of the housing 10.
[0032] like Figures 1 to 4As shown, the nuclear power plant potential acquisition instrument also includes several energized potential wires 40. One end of each energized potential wire 40 passes through the housing 10 to connect to the circuit board 30, and the other end of each energized potential wire 40 is connected to the nuclear power plant's drum-shaped rotating filter via a fixing plate 41. Preferably, there are two energized potential wires 40, each with one end passing through the housing 10 to connect to the circuit board 30, and the other end connected to the side wall of the channel steel 100 of the nuclear power plant's drum-shaped rotating filter via the fixing plate 41. The other end of each energized potential wire 40 is provided with a terminal block (e.g., an O-type cold-pressed terminal block). The fixing plate 41 has a U-shaped structure, and the terminal block is connected to the fixing plate 41 via a first bolt 42, which can be configured with a balancing spring washer. The fixing plate 41 is connected to the side wall of the channel steel 100 of the nuclear power plant's drum-shaped rotating filter via a second bolt 43. The first bolt 42 includes, but is not limited to, an M8X12 hex bolt, and the second bolt 43 includes, but is not limited to, an M8X25 hex bolt. Both the first bolt 42 and the second bolt 43 can be made of Q235 stainless steel. The energized conductor 40 can be, but is not limited to, a seawater-resistant twisted-pair shielded cable.
[0033] This nuclear power plant potential acquisition instrument can be used to collect data on energized potential, self-corrosion test piece potential, reference electrode potential, polarization test piece potential, and resistance ER, in order to detect the working environment data of the nuclear power plant's drum-type rotary filter. This facilitates effective cathodic protection of the nuclear power plant's drum-type rotary filter, improves the working stability of the nuclear power plant's drum-type rotary filter, and thus ensures the operational stability of the nuclear power unit. Furthermore, the potential data collected by this nuclear power plant potential acquisition instrument is more comprehensive.
[0034] like Figure 4 As shown, the bottom of the housing 10 is also provided with a magnetic base 50 for magnetically attaching to the drum-shaped rotating filter screen of the nuclear power plant. The magnetic base 50 can be used to magnetically attach to the bottom wall of the channel steel 100 of the drum-shaped rotating filter screen of the nuclear power plant, realizing the rapid magnetic installation of the nuclear power plant potential acquisition instrument. In addition, the housing 10 can also be connected and fixed to the channel steel 100 by fastening bolts or fastening screws, improving the connection stability and ensuring that the nuclear power plant potential acquisition instrument remains connected without breaking, shifting, or falling off during the rotation of the drum-shaped rotating filter screen of the nuclear power plant.
[0035] In some embodiments, the reference electrode 21 is used to provide a stable potential reference. The reference electrode 21 may be selected from, but is not limited to, a solid silver chloride electrode, and the specification of the reference electrode 21 may be φ6mm.
[0036] In some embodiments, the self-corroding test piece 22 is 10 cm 2 The cylindrical specimen, made of a material similar to the drum-type rotary filter in nuclear power plants, is used to assess the corrosion status of the drum-type rotary filter in nuclear power plants. In some embodiments, the number of these self-corrosion test pieces 22 may be two.
[0037] In some embodiments, the polarization sample 23 is selected as 1cm 2 It has a cylindrical shape and is made of a material similar to the drum-type rotary filter in nuclear power plants. It is used to evaluate the polarization performance of the drum-type rotary filter in nuclear power plants.
[0038] In some embodiments, the ER probe 24 is used to measure resistance ER data, with a specification of 10cm. 2 Round or disc-shaped.
[0039] In some embodiments, the nuclear power plant potential acquisition instrument further includes a water immersion sensor 60 installed on the housing 10 and connected to the circuit board 30, which can sense the state of seawater entering and leaving the nuclear power plant's drum-shaped rotary filter.
[0040] In some embodiments, the bottom of the housing 10 is provided with an anti-slip pad 70. The anti-slip pad 70 may be fixed to the bottom of the housing 10 with seawater-resistant 3M adhesive. The anti-slip pad 70 includes, but is not limited to, an anti-slip EVA sponge pad. The dimensions of the anti-slip pad 70 may be 170mm × 119mm × 1mm.
[0041] In some embodiments, the housing 10 includes a detachably connected upper housing 11 and a lower housing 12, both made of corrosion-resistant ABS material to ensure stability in harsh environments. The upper housing 11 may have dimensions of 183mm × 120mm × 63mm or 173mm × 120mm × 34.5mm.
[0042] The upper housing 11 has a first mounting groove 111 and a second mounting groove 112 arranged opposite to each other. The first mounting groove 111 contains a first mounting portion 1111 for mounting a reference electrode 21, a second mounting portion 1112 for mounting a self-corrosion test piece 22, a third mounting portion 1113 for mounting a polarization test piece 23, and a fourth mounting portion 1114 for mounting an ER probe 24. The second mounting part 1112, the third mounting part 1113, and the fourth mounting part 1114 can all be cylindrical structures, with a supporting step at the upper end. In addition, the side walls of the first mounting part 1111, the second mounting part 1112, the third mounting part 1113, and the fourth mounting part 1114 can be provided with notches so that when the first mounting groove 111 is filled with potting compound, the potting compound can fill the inner cavity of the first mounting part 1111, the second mounting part 1112, the third mounting part 1113, and the fourth mounting part 1114 to improve the sealing performance.
[0043] See Figure 4 and Figure 5In some embodiments, the bottom wall of the first mounting groove 111 is provided with a first wire passage hole 1115, a second wire passage hole 1116, a third wire passage hole 1117, and a fourth wire passage hole 1118. The first wire passage hole 1115 is used for the cable of the reference electrode 21 to pass through, the second wire passage hole 1116 is used for the cable of the self-corrosion test piece 22 to pass through, the third wire passage hole 1117 is used for the cable of the polarization test piece 23 to pass through, and the fourth wire passage hole 1118 is used for the cable of the ER probe 24 to pass through. Silicone sleeves can be provided inside the first wire passage hole 1115, the second wire passage hole 1116, the third wire passage hole 1117, and the fourth wire passage hole 1118 to improve sealing. The silicone sleeves can be, but are not limited to, T-shaped silicone sleeves.
[0044] See Figure 4 and Figure 6 In some embodiments, the circuit board 30 is mounted within the second mounting groove 112. The top wall of the second mounting groove 112 is provided with a plurality of mounting posts 1121, and the circuit board 30 is detachably connected to the mounting posts 1121. The circuit board 30 can be connected to the mounting posts 1121 via fasteners 31 and insulating gaskets 32. The fasteners 31 can be, but are not limited to, bolts or screws, and the insulating gaskets 32 include, but are not limited to, M3 red steel paper insulating gaskets. Further, the bottom wall of the first mounting groove 111 is the top wall of the second mounting groove 112. The circuit board 30 includes, but is not limited to, a PCB board, and may be equipped with a wireless communication module to facilitate real-time acquisition of cathodic protection data and wireless transmission to the nuclear power plant's monitoring system. The wireless communication module includes, but is not limited to, 3G / 4G / 5G modules, WIFI modules, ZigBee modules, LoRa, NB-IoT, Bluetooth, etc.
[0045] See Figures 4 to 6 In some embodiments, the upper housing 11 further includes a third mounting groove 113, which is adjacent to the second mounting groove 112. The third mounting groove 113 contains a battery 80 connected to the circuit board 30. The battery 80 may be installed inside a battery compartment, the bottom of which may have a cushioning pad 81, which may include, but is not limited to, an EVA foam pad. The cushioning pad 81 may have dimensions of 80mm × 30mm × 3mm. The cushioning pad 81 may be fixed to the bottom of the battery compartment using 3M adhesive. The battery 80 may include, but is not limited to, a lithium-ion battery.
[0046] See Figure 4 and Figure 5In some embodiments, the lower edge of the upper housing 11 is provided with a first sealing groove 114, and a sealing gasket 115 is provided within the first sealing groove 114. The first sealing groove 114 may be a rectangular annular groove, and the sealing gasket 115 includes, but is not limited to, a fluororubber outer sealing gasket. The sealing gasket 115 can improve the sealing performance. Preferably, the outer casing 10 may include a fastening screw 13 and a silicone flat washer 14. The fastening screw 13 passes through the silicone flat washer 14, the lower housing 12, the sealing gasket 115, and the upper housing 11. In addition, the portion of the fastening screw 13 passing through the upper housing 11 can be reinforced by a nut. The fastening screw 13 includes, but is not limited to, an internal hexagon socket head cap screw, and the silicone flat washer 14 includes, but is not limited to, an M4×9mm×2mm silicone flat washer.
[0047] See Figure 4 and Figure 5 In some embodiments, a second sealing groove 116 is provided along the lower edge of the upper housing 11, and sealant 117 is disposed within the second sealing groove 116. The second sealing groove 116 may be located within the inner ring of the first sealing groove 114, which may be a rectangular annular groove. The sealant 117 includes, but is not limited to, 588 silicone gasket-free sealant. The sealant 117 can be used for internal sealing to prevent moisture and corrosive substances from entering the interior of the nuclear power plant potential acquisition instrument.
[0048] See Figures 4 to 7 In some embodiments, the lower housing 12 has a cylindrical structure, and the magnetic base 50 is detachably connected to the inner bottom wall of the lower housing 12. The magnetic base 50 is generally rectangular plate-shaped, and has several first mounting holes. The inner bottom wall of the lower housing 12 may have several second mounting holes. Screws 51 connect the first mounting holes and the second mounting holes, so that the magnetic base 50 can be detachably installed inside the lower housing 12. The screws 51 may be, but are not limited to, ST2.9X7 Phillips head countersunk self-tapping screws. The magnetic base 50 may be equipped with, but is not limited to, N52 high-strength magnets.
[0049] like Figure 6 and Figure 7 As shown, in some embodiments, the lower end of the upper housing 11 is provided with a plurality of slots 118, and the upper end of the lower housing 12 is provided with a protrusion 121 that mates with the plurality of slots 118, so that the two can be pre-fixed by insertion.
[0050] 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 potential acquisition instrument for nuclear power plants, characterized in that, Includes a housing (10), which is provided with a reference electrode (21), a self-corroding test piece (22), a polarization test piece (23), and an ER probe (24). The housing (10) is provided with a circuit board (30) connected to the reference electrode (21), the self-corroding test piece (22), the polarization test piece (23), the reference electrode (21), and the ER probe (24). The nuclear power plant potential acquisition instrument also includes several energized potential wires (40), one end of which passes through the outer shell (10) to connect to the circuit board (30), and the other end of which is connected to the nuclear power plant drum-shaped rotating filter through a fixing plate (41). The bottom of the outer casing (10) is also provided with a magnetic holder (50) for magnetically attaching to the drum-shaped rotating filter screen of the nuclear power plant.
2. The nuclear power plant potential acquisition instrument according to claim 1, characterized in that, The nuclear power plant potential acquisition instrument also includes a water immersion sensor (60) installed on the housing (10) and connected to the circuit board (30).
3. The nuclear power plant potential acquisition instrument according to claim 1, characterized in that, The bottom of the outer casing (10) is provided with an anti-slip pad (70).
4. The nuclear power plant potential acquisition instrument according to any one of claims 1 to 3, characterized in that, The outer casing (10) includes a detachably connected upper casing (11) and a lower casing (12); The upper housing (11) has a first mounting groove (111) and a second mounting groove (112) arranged opposite to each other. The first mounting groove (111) is provided with a first mounting part (1111) for mounting a reference electrode (21), a second mounting part (1112) for mounting a self-corrosion test piece (22), a third mounting part (1113) for mounting a polarization test piece (23), and a fourth mounting part (1114) for mounting an ER probe (24). The circuit board (30) is installed in the second mounting slot (112).
5. The nuclear power plant potential acquisition instrument according to claim 4, characterized in that, The bottom wall of the first mounting groove (111) is provided with a first wire passage hole (1115), a second wire passage hole (1116), a third wire passage hole (1117) and a fourth wire passage hole (1118). The first wire passage hole (1115) is used for the cable of the reference electrode (21) to pass through, the second wire passage hole (1116) is used for the cable of the self-corrosion test piece (22) to pass through, the third wire passage hole (1117) is used for the cable of the polarization test piece (23) to pass through, and the fourth wire passage hole (1118) is used for the cable of the ER probe (24) to pass through.
6. The nuclear power plant potential acquisition instrument according to claim 4, characterized in that, The top wall of the second mounting groove (112) is provided with a plurality of mounting posts (1121), and the circuit board (30) is detachably connected to the mounting posts (1121).
7. The nuclear power plant potential acquisition instrument according to claim 4, characterized in that, The upper housing (11) is also provided with a third mounting groove (113), which is adjacent to the second mounting groove (112). The third mounting groove (113) is provided with a battery (80) connected to the circuit board (30).
8. The nuclear power plant potential acquisition instrument according to claim 4, characterized in that, The lower edge of the upper housing (11) is provided with a first sealing groove (114), and a sealing gasket (115) is provided in the first sealing groove (114).
9. The nuclear power plant potential acquisition instrument according to claim 4, characterized in that, The lower edge of the upper housing (11) is provided with a second sealing groove (116), and the second sealing groove (116) is provided with sealant (117).
10. The nuclear power plant potential acquisition instrument according to claim 4, characterized in that, The lower housing (12) has a cylindrical structure, and the magnetic base (50) is detachably connected to the inner bottom wall of the lower housing (12).