A nuclear power plant main pump rotating speed probe positioning device

Abstract

The utility model discloses a nuclear power plant main pump rotating speed probe positioning device, include: bearing seat, positioning subassembly, first locking piece and measuring component to bearing seat positioning installation is on the limit piece of pump shaft, limit piece is installed on bearing seat, and the locating surface that limit piece is provided with and pump shaft outer surface is contacted, positioning subassembly sliding connection is in bearing seat, and the locating recess that positioning subassembly is provided with and probe top end is contacted, first locking piece is installed on positioning subassembly or bearing seat, and the position of limiting positioning subassembly on bearing seat. The whole adjustment process is more simple and easy, reduces the number of adjustment, improves work efficiency, reduces the inclination of probe after installation, improves the accuracy and stability when rotating speed measurement, avoids the risk of impact, is convenient for operating, can complete the refueling procedure in time, reduces the influence to nuclear power unit grid-connected power generation time.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power technology, and in particular to a nuclear power plant main pump speed probe positioning device. Background Technology

[0002] The reactor coolant pump, or main pump, in a nuclear power plant functions to force the coolant to circulate, thereby transferring the heat energy generated in the reactor to the steam generator to produce steam that drives the turbine to do work. To ensure the normal operation of the main pump, its operating status needs to be monitored. Using a main pump speed sensor can effectively monitor the operating speed of the main pump.

[0003] The main pump speed sensing device generally adopts the magnetoresistive measurement principle and has a U-shaped groove design. It mainly consists of two parts: a probe and a speed sensor. The probe is fixed on the main shaft of the main pump, so it can rotate with the main shaft. The speed sensor is fixed on an external bracket and is in a stationary state. When the main shaft of the main pump rotates, it causes the probe to cut the main pump speed sensor, which generates a pulse signal. The main pump speed can be measured by measuring this signal.

[0004] Because the main pump speed sensor needs to be disassembled and reassembled during each refueling cycle, the reinstallation or adjustment of the probe consumes a significant amount of time. Due to the extremely high precision requirements and lengthy installation time, and the fact that the installation parameters of the main pump speed probe require manual measurement and fixation, human error is prone to occur during the process. This can result in the probe being tilted after installation, affecting the accuracy and stability of the speed measurement to some extent. This also impacts the grid connection time of the nuclear power unit and poses a certain risk of impact. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a nuclear power plant main pump speed probe positioning device.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A nuclear power plant main pump speed probe positioning device is constructed, comprising: a support base, a positioning component, a first locking component, and a measuring component, as well as a limiting component for positioning the support base on the pump shaft; the limiting component is installed on the support base, and the limiting component has a positioning surface that contacts the outer surface of the pump shaft; the positioning component is slidably connected to the support base, and the positioning component has a positioning groove that contacts the tip of the probe; the first locking component is installed on the positioning component or the support base, limiting the position of the positioning component on the support base; the measuring component is installed on the positioning component, measuring the longitudinal and transverse distances of the positioning groove on the pump shaft.

[0007] Furthermore, the positioning component includes: a first bracket, a second bracket, and a positioning frame. The first bracket is laterally slidably connected to the support seat, the second bracket is mounted on the first bracket, the positioning frame is longitudinally slidably connected to the second bracket, and the positioning groove is disposed on the second bracket. A plurality of first locking members are respectively mounted on the support seat and the second bracket to limit the distance between the positioning groove and the pump shaft.

[0008] Furthermore, the measuring component includes a horizontal scale and a vertical scale. The horizontal scale is mounted on the first bracket and cooperates with the support to measure the horizontal distance between the positioning groove and the pump shaft. The vertical scale is mounted on the second bracket and cooperates with the positioning frame to measure the vertical distance between the positioning groove and the pump shaft.

[0009] Furthermore, the longitudinal scale includes a reversing component and a measuring scale, both of which are mounted on the second bracket. The transverse measurement of the measuring scale is changed to a longitudinal measurement of the positioning groove by the reversing component, so that both the measuring scale and the transverse scale are located in the transverse direction of the pump shaft.

[0010] Furthermore, the reversing component includes: an extension rod and a flip plate, the flip plate being rotatably connected to the second bracket, the extension rod being slidably connected to the second bracket, one end of the extension rod contacting the positioning frame, and the other end of the extension rod contacting one side of the flip plate; the measuring ruler is mounted on the second bracket, and the measuring end of the measuring ruler is in contact with the other side of the flip plate.

[0011] Furthermore, the extension rod is slidably connected to the second bracket in the longitudinal direction, and the measuring end of the measuring ruler is horizontally arranged on the second bracket. The measuring end of the measuring ruler lifts the extension rod through the flip plate so that the extension rod moves synchronously with the measuring end of the measuring ruler.

[0012] Furthermore, the limiting component includes a magnetic component and a locking block. The locking block is mounted on the support base, and multiple positioning surfaces are disposed on the locking block, one of which is arc-shaped. The magnetic component is mounted on the support base and magnetically adsorbs onto the pump shaft.

[0013] Furthermore, the nuclear power plant main pump speed probe positioning device also includes a simulated probe, which is installed on the pump shaft in contact with the positioning groove; and / or the magnetic component is a permanent magnet or an electromagnet.

[0014] Furthermore, the support includes: a support plate, a slide, and a second locking member. The slide is slidably connected to the support plate, the first bracket is slidably connected to the slide, and the second locking member is installed on the slide to limit the distance between the slide and the support plate.

[0015] Furthermore, the first locking member and / or the second locking member are provided with multiple anti-slip grooves.

[0016] The following are the beneficial effects of implementing this utility model: This application utilizes a limiting component mounted on a support base. The limiting component has a positioning surface that contacts the outer surface of the pump shaft. A positioning assembly is slidably connected to the support base and has a positioning groove that contacts the tip of the probe. A first locking component is mounted on the positioning assembly or the support base, restricting the position of the positioning assembly on the support base. The probe is then placed into the positioning groove, ensuring the lower surface of the probe contacts the upper surface of the groove and the side of the probe contacts the side of the groove. The positioned probe is then installed on the pump shaft. Removing the nuclear power plant main pump speed probe positioning device completes the probe's assembly and disassembly. The entire adjustment process is simpler and less labor-intensive, reducing the number of adjustments, improving work efficiency, reducing the probe's tilt after installation, improving the accuracy and stability of speed measurement, avoiding the risk of impact, facilitating operation, enabling timely refueling, and reducing the impact on the nuclear power unit's grid connection time. Attached Figure Description

[0017] 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 regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] In the attached image: Figure 1 This is a schematic diagram of the installation position of the nuclear power plant main pump speed probe positioning device in some embodiments of this utility model; Figure 2 This is a three-dimensional structural schematic diagram of the nuclear power plant main pump speed probe positioning device in this utility model; Figure 3 This is a cross-sectional schematic diagram of the second bracket in this utility model; Figure 4 This is a structural schematic diagram of the support plate and slide in this utility model.

[0019] Explanation of markings in the diagram 1. Support base, 12. Support plate, 13. Slide, 14. Second locking component, 2. Positioning assembly, 21. Positioning groove, 22. First bracket, 23. Second bracket, 24. Positioning frame, 3. First locking component, 4. Measuring assembly, 41. Horizontal scale, 42. Vertical scale, 421. Directional component, 421. Extension rod, 4211. Flip plate, 4212. Measuring ruler, 422. Limiting component, 5. Positioning surface, 51. Magnet component, 52. Locking block, 53. Probe, 6. Anti-slip groove, 7. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] Please see Figures 1 to 4 A nuclear power plant main pump speed probe positioning device according to the first embodiment of this utility model includes: a support base 1, a positioning component 2, a first locking member 3, and a measuring component 4, as well as a limiting member 5 for positioning the support base 1 on the pump shaft. The limiting member 5 is mounted on the support base 1 and has a positioning surface 51 that contacts the outer surface of the pump shaft. The positioning component 2 is slidably connected to the support base 1 and has a positioning groove 21 that contacts the tip of the probe 6. The first locking member 3 is mounted on the positioning component 2 or the support base 1, limiting the position of the positioning component 2 on the support base 1. The measuring component 4 is mounted on the positioning component 2 and measures the longitudinal and transverse distances of the positioning groove 21 on the pump shaft.

[0024] This application uses a limiting member 5 to install on a carrier 1. The limiting member 5 has a positioning surface 51 that contacts the outer surface of the pump shaft. The positioning component 2 is slidably connected to the carrier 1 and has a positioning groove 21 that contacts the top of the probe 6. The first locking member 3 is installed on the positioning component 2 or the carrier 1 to restrict the position of the positioning component 2 on the carrier 1. During disassembly, the positioning surface 51 below the limiting member 5 is hooked onto the upper surface of the pump shaft, so that the positioning surface 51 contacts the outer surface of the pump shaft, positioning the carrier 1 and keeping the carrier 1 and the pump shaft unchanged. Then, the positioning component 2 is slid to place the probe 6 on the pump shaft into the positioning groove 21, so that the lower surface of the probe 6 contacts the upper surface of the positioning groove 21, and the side of the probe 6 contacts the side of the positioning groove 21. After contact, the first locking member 3 limits the positioning component 2, keeping the positioning component 2 and the carrier 1 relatively stationary. Then, the measuring component 4 is used to record the longitudinal and lateral distances of the positioning groove 21 on the pump shaft. Afterwards, the main pump speed sensor can be disassembled for refueling. During installation, simply hook the positioning surface 51 below the limiting member 5 onto the upper surface of the pump shaft, keeping the positioning assembly 2 and the support seat 1 relatively stationary with respect to the pump shaft. Then, place the probe 6 into the positioning groove 21, ensuring the lower surface of the installed probe 6 contacts the upper surface of the positioning groove 21, and the side of the probe 6 contacts the side of the positioning groove 21. Finally, install the positioned probe 6 onto the pump shaft and remove the nuclear power plant main pump speed probe positioning device to complete the installation and removal of the probe 6. The entire adjustment process is simpler and less labor-intensive, reducing the number of adjustments, improving work efficiency, reducing the tilt of the probe 6 after installation, improving the accuracy and stability of speed measurement, avoiding the risk of impact, facilitating operation, enabling timely refueling, and reducing the impact on the nuclear power unit's grid connection time.

[0025] The positioning component 2 can slide laterally or longitudinally on the bearing seat 1 via the guide rail, changing the lateral and longitudinal distance between the positioning groove 21 and the pump shaft, thus facilitating adjustment. It can also record data through the measuring component 4 to prepare for the next material change, thereby improving work efficiency.

[0026] Among them, the measuring component 4 can be a micrometer. By measuring the lateral and longitudinal distances of the positioning component 2 on the carrier 1, since the carrier 1 remains relatively stationary with respect to the pump shaft after installation, the lateral and longitudinal distances between the positioning groove 21 and the pump shaft can be obtained. When adjusting the probe 6, the probe 6 can be adjusted more accurately by measuring the changes in the values ​​on the measuring component 4, thereby improving the accuracy and stability of the adjustment, increasing the efficiency of the adjustment, and facilitating operation.

[0027] Among them, the positioning surface 51 below the limiting component 5 hooks onto the upper surface of the pump shaft, which makes it easy to position and install the bearing seat 1 on the pump shaft, reducing the difficulty of operation, reducing labor intensity, facilitating installation, improving work efficiency, ensuring consistent positioning before and after material change, and improving the accuracy of probe 6 installation.

[0028] Please see Figures 1 to 4 In some embodiments, the positioning component 2 includes a first bracket 22, a second bracket 23, and a positioning frame 24. The first bracket 22 is laterally slidably connected to the support base 1, the second bracket 23 is mounted on the first bracket 22, and the positioning frame 24 is longitudinally slidably connected to the second bracket 23. A positioning groove 21 is disposed on the second bracket 23. A plurality of first locking members 3 are respectively mounted on the support base 1 and the second bracket 23 to limit the distance between the positioning groove 21 and the pump shaft.

[0029] This application uses a first bracket 22 that is laterally slidably connected to a support base 1, a second bracket 23 mounted on the first bracket 22, and a positioning frame 24 that is longitudinally slidably connected to the second bracket 23. A positioning groove 21 is provided on the second bracket 23. By laterally sliding the first bracket 22 on the support base 1, the lateral distance between the positioning groove 21 and the pump shaft can be changed. Similarly, by longitudinally sliding the positioning frame 24 on the second bracket 23, the longitudinal distance between the positioning groove 21 and the pump shaft can be changed, allowing the probe 6 to contact the inner wall of the positioning groove 21, thus enabling separate adjustments. This makes the adjustment more flexible, expands the adjustment range, and consequently expands the scope of application. While adjusting the distance, the adjusted distance can be measured and recorded by the measuring component 4, further improving the accuracy of the adjustment and facilitating future use and adjustment. Then, multiple first locking parts 3 are used to lock and fix the slid-on first bracket 22 and positioning frame 24, thereby improving the stability during the adjustment and installation of the probe 6 and reducing other interference.

[0030] Please see Figures 1 to 4In some embodiments, the measuring component 4 includes a horizontal scale 41 and a vertical scale 42. The horizontal scale 41 is mounted on the first bracket 22 and cooperates with the support seat 1 to measure the horizontal distance between the positioning groove 21 and the pump shaft. The vertical scale 42 is mounted on the second bracket 23 and cooperates with the positioning frame 24 to measure the vertical distance between the positioning groove 21 and the pump shaft.

[0031] This application uses a horizontal scale 41 mounted on the first bracket 22, which works with the support seat 1 to measure the lateral distance between the positioning groove 21 and the pump shaft. A vertical scale 42 is mounted on the second bracket 23, which works with the positioning frame 24 to measure the longitudinal distance between the positioning groove 21 and the pump shaft. By having the measuring end of the horizontal scale 41 contact the support seat 1, the lateral sliding distance of the first bracket 22 on the support seat 1 is obtained. Then, by increasing the thickness of the support seat 1, the lateral distance between the positioning groove 21 and the pump shaft is obtained. After installing the probe 6 within the positioning groove 21, the lateral position and distance of the probe 6 on the pump shaft are obtained. Similarly, by measuring the longitudinal distance between the positioning frame 24 and the second bracket 23 after sliding using the vertical scale 42, the longitudinal distance is added to the length of the support seat 1, the first bracket 22, and the second bracket 23 to obtain the longitudinal distance between the positioning groove 21 and the pump shaft. After installing the probe 6 within the positioning groove 21, the longitudinal position and distance of the probe 6 on the pump shaft are obtained. This improves the efficiency of adjustment and installation. By measuring the distance after installation, the relative position between probe 6 and the speed sensor can be determined. It also avoids collisions with probe 6 after installation, further improving safety and reducing maintenance costs.

[0032] Please see Figures 1 to 4 In some embodiments, the longitudinal scale 42 includes a reversing element 421 and a measuring scale 422. Both the reversing element 421 and the measuring scale 422 are mounted on the second bracket 23. The lateral measurement of the measuring scale 422 is changed by the reversing element 421 to the longitudinal measurement of the positioning groove 21, so that both the measuring scale 422 and the lateral scale 41 are located in the lateral direction of the pump shaft.

[0033] This application utilizes a reversing component 421 and a measuring scale 422, both mounted on the second bracket 23. The reversing component 421 changes the lateral measurement of the measuring scale 422 to a longitudinal measurement of the positioning groove 21, ensuring that both the measuring scale 422 and the lateral scale 41 are located laterally on the pump shaft. The reversing component 421 positions both the measuring scale 422 and the lateral scale 41 perpendicular to the pump shaft axis on the positioning assembly 2, aligning them in the same direction. This facilitates adjustment, improves adjustment efficiency, reduces the space occupied by the measuring assembly 4, facilitates the installation of the probe 6, reduces labor intensity, and makes measurement more effortless and convenient.

[0034] The deflector 421 can be a top block. Through this triangular top block, when the measuring end of the measuring scale 422 approaches the pump shaft laterally, the measuring end of the measuring scale 422 will press against an inclined surface of the triangular top block, causing the triangular top block to move longitudinally along the pump shaft. Thus, the lateral extension of the measuring scale 422 becomes the longitudinal movement of the triangular top block. This allows the longitudinal scale 42 to be placed in the lateral position of the pump shaft, enabling the measurement of the longitudinal distance between the positioning groove 21 and the pump shaft. This facilitates adjustment and measurement, reduces labor intensity, and makes measurement more effortless and convenient.

[0035] Please see Figures 1 to 4 In some embodiments, the deflector 421 includes an extension rod 4211 and a flip plate 4212. The flip plate 4212 is rotatably connected to the second bracket 23, and the extension rod 4211 is slidably connected to the second bracket 23. One end of the extension rod 4211 is in contact with the positioning frame 24, and the other end of the extension rod 4211 is in contact with one side of the flip plate 4212. A measuring ruler 422 is mounted on the second bracket 23, and the measuring end of the measuring ruler 422 is in contact with the other side of the flip plate 4212.

[0036] This application uses a flip plate 4212 rotatably connected to a second bracket 23, and an extension rod 4211 slidably connected to the second bracket 23. One end of the extension rod 4211 contacts the positioning frame 24, and the other end of the extension rod 4211 contacts one side of the flip plate 4212. A measuring ruler 422 is mounted on the second bracket 23, and the measuring end of the measuring ruler 422 contacts the other side of the flip plate 4212. When measuring the longitudinal distance between the positioning groove 21 and the pump shaft, the measuring ruler 422 is moved closer to the pump shaft, causing the measuring end of the measuring ruler 422 to push the flip plate 4212 to rotate clockwise. The clockwise rotating flip plate 4212 pushes one end of the extension rod 4211 upward, causing the other end of the extension rod 4211 to contact the bottom end of the positioning frame 24, thereby measuring the longitudinal distance between the positioning groove 21 and the pump shaft. When the extension rod 4211 is to be separated from the positioning frame 24, since the entire nuclear power plant main pump speed probe positioning device is vertically mounted on the pump shaft, when the measuring end of the measuring ruler 422 moves laterally away from the pump shaft, without the support of the measuring end, the flip plate 4212 will rotate counterclockwise under the gravity of the extension rod 4211, causing the extension rod 4211 to descend and separate from the positioning frame 24. This allows the measuring end of the measuring ruler 422 to move synchronously with the extension rod 4211, thereby completing the measurement of the longitudinal distance between the positioning groove 21 and the pump shaft. The structure is simple, easy to manufacture, reduces manufacturing costs, is not prone to damage, has a long service life, and provides accurate measurements.

[0037] When adjusting the longitudinal and transverse distances of the positioning groove 21, it is necessary to first adjust the transverse scale 41 and the longitudinal scale 42 so that the measuring end of the transverse scale 41 is separated from the bearing seat 1 and the extension rod 4211 is separated from the positioning frame 24, so as to avoid interference of the measuring component 4 with the positioning component 2 and improve the accuracy and efficiency of adjusting the positioning groove 21.

[0038] Please see Figures 1 to 4 In some embodiments, the extension rod 4211 is longitudinally slidably connected to the second bracket 23, and the measuring end of the measuring ruler 422 is laterally disposed on the second bracket 23. The measuring end of the measuring ruler 422 lifts the extension rod 4211 through the flip plate 4212 so that the extension rod 4211 moves synchronously with the measuring end of the measuring ruler 422.

[0039] This application uses an extension rod 4211 to slide longitudinally onto a second bracket 23. The measuring end of a measuring scale 422 is laterally positioned on the second bracket 23. The measuring end of the measuring scale 422 lifts the extension rod 4211 via a flip plate 4212, allowing the extension rod 4211 to move synchronously with the measuring end of the measuring scale 422. The flip plate 4212 rotates at an angle on the second bracket 23. When the laterally positioned measuring scale 422 extends, it drives the extension rod 4211 longitudinally toward the positioning frame 24 via the flip plate 4212, bringing the extension rod 4211 into contact with the positioning frame 24. The length of movement of the extension rod 4211 is proportional to the length of extension of the measuring end of the measuring scale 422, thus obtaining the length of extension of the measuring end of the measuring scale 422. This value is recorded to obtain the longitudinal position of the positioning groove 21 on the pump shaft. The structure is simple, easy to adjust, reduces labor intensity, and facilitates the positioning of the probe 6.

[0040] Please see Figures 1 to 4 In some embodiments, the limiting member 5 includes a magnet 52 and a locking block 53. The locking block 53 is mounted on the support base 1, and multiple positioning surfaces 51 are disposed on the locking block 53, one of which is arc-shaped.

[0041] This application utilizes a locking block 53 mounted on a support base 1. Multiple positioning surfaces 51 are provided on the locking block 53, one of which is arc-shaped. A magnetic component 52 is mounted on the support base 1 and magnetically attracts the pump shaft. The locking block 53 is used to determine the positioning between the support base 1 and the pump shaft before and after material changes. The relative position of the support base 1 and the pump shaft remains unchanged before and after each material change. The locking block 53 facilitates the positioning and installation of the support base 1 on the pump shaft, improving adjustment efficiency and reducing labor intensity. The arc-shaped positioning surface 51 allows the locking block 53 to fit against the outer surface of the pump shaft. The magnetic component 52 then magnetically attracts the support base 1 to the pump shaft, further expanding the range of positioning and installation of the support base 1 on the pump shaft. This allows the support base 1 to be installed in more positions on the pump shaft, broadening its application range and making it suitable for more installation environments.

[0042] When using the arc-shaped positioning surface 51 to position and install the bearing seat 1, during material change, it is necessary to first measure and record the distance between the top of the clamping block 53 and the top of the pump shaft, and then disassemble the probe 6. During installation, the distance between the top of the clamping block 53 and the top of the pump shaft must remain unchanged. Then, the bearing seat 1 is positioned and installed on the pump shaft by the magnet 52. After that, the probe 6 is placed in the positioning groove 21 and fixedly installed on the pump shaft, thereby improving the accuracy of adjustment and expanding the applicable range.

[0043] Please see Figures 1 to 4 In some embodiments, the nuclear power plant main pump speed probe positioning device further includes a simulated probe, which is mounted on the pump shaft in contact with the positioning groove 21. And / or the magnetic component 52 is a permanent magnet or an electromagnet.

[0044] This application uses a simulated probe that contacts the positioning groove 21 and is installed on the pump shaft. The simulated probe can be made of a flexible material, such as rubber or polyurethane. Then, the nuclear power plant main pump speed probe positioning device is removed from the pump shaft, and the pump shaft is rotated to check whether the simulated probe passes smoothly through the groove of the speed sensing device. After passing smoothly, the simulated probe is replaced with probe 6, which avoids impact on the speed sensing device, thereby improving safety and saving maintenance costs.

[0045] This application uses a permanent magnet or an electromagnet as the magnet component 52. The permanent magnet component 52 can save energy consumption and reduce the cost of material replacement. The electromagnet component 52 is energized after positioning and installation, so that the bearing seat 1 fits tightly against the pump shaft, which facilitates disassembly and improves the stability after installation.

[0046] Please see Figures 1 to 4In some embodiments, the support 1 includes a support plate 12, a slide 13, and a second locking member 14. The slide 13 is slidably connected to the support plate 12, the first bracket 22 is slidably connected to the slide 13, and the second locking member 14 is installed on the slide 13 to limit the distance between the slide 13 and the support plate 12.

[0047] In this application, the slide 13 is slidably connected to the support plate 12 via a T-slot, the first bracket 22 is slidably connected to the slide 13, and the second locking member 14 is installed on the slide 13 to limit the distance between the slide 13 and the support plate 12. By sliding the slide 13 laterally or longitudinally to the support plate 12, the lateral or longitudinal distance between the slide 13 and the pump shaft can be increased. When the probe 6 contacts the inner wall of the positioning groove 21, the second locking member 14 is tightened, causing its end to contact the support plate 12 to lock the slide 13, further expanding the applicability of the positioning groove 21 and making it suitable for more usage environments.

[0048] The sliding distance of the slide block 13 on the bearing plate 12 can also be measured by adding a micrometer, or manually by using calipers or tape measure, thereby expanding the range of applications and making it suitable for more pump shaft models.

[0049] Please see Figures 1 to 4 In some embodiments, the first locking member 3 and / or the second locking member 14 are provided with a plurality of anti-slip grooves 7.

[0050] This application features multiple anti-slip grooves 7 on the first locking member 3 and / or the second locking member 14. The anti-slip grooves 7 increase friction, allowing operators to adjust the first locking member 3 and / or the second locking member 14 with less effort, thereby improving adjustment efficiency, making operation more labor-saving and convenient, and reducing the use of tools.

[0051] 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 nuclear power plant main pump rotational speed probe positioning device, characterized by, include: The carrier (1), the positioning assembly (2), the first locking element (3) and the measuring assembly (4), and the limiting element (5) that positions the carrier (1) on the pump shaft; The limiting member (5) is installed on the bearing seat (1), and the limiting member (5) is provided with a positioning surface (51) that contacts the outer surface of the pump shaft. The positioning component (2) is slidably connected to the support (1). The positioning component (2) is provided with a positioning groove (21) that contacts the top of the probe (6). The first locking member (3) is installed on the positioning component (2) or the support (1) to limit the position of the positioning component (2) on the support (1). The measuring component (4) is mounted on the positioning component (2) to measure the longitudinal and lateral distances of the positioning groove (21) on the pump shaft.

2. The nuclear power plant primary pump speed probe positioning device of claim 1, wherein, The positioning component (2) includes: a first bracket (22), a second bracket (23) and a positioning frame (24). The first bracket (22) is laterally slidably connected to the bearing seat (1). The second bracket (23) is mounted on the first bracket (22). The positioning frame (24) is longitudinally slidably connected to the second bracket (23). The positioning groove (21) is provided on the second bracket (23). Multiple first locking elements (3) are respectively installed on the bearing seat (1) and the second bracket (23) to limit the distance between the positioning groove (21) and the pump shaft.

3. The nuclear power plant primary pump speed probe positioning device of claim 2, wherein, The measuring component (4) includes a horizontal scale (41) and a vertical scale (42). The horizontal scale (41) is mounted on the first bracket (22) and cooperates with the bearing seat (1) to measure the horizontal distance between the positioning groove (21) and the pump shaft. The vertical scale (42) is mounted on the second bracket (23) and cooperates with the positioning frame (24) to measure the vertical distance between the positioning groove (21) and the pump shaft.

4. The nuclear power plant primary pump speed probe positioning device of claim 3, wherein, The longitudinal scale (42) includes a reversing element (421) and a measuring scale (422). The reversing element (421) and the measuring scale (422) are both mounted on the second bracket (23). The transverse measurement of the measuring scale (422) is changed to the longitudinal measurement of the positioning groove (21) by the reversing element (421) so that the measuring scale (422) and the transverse scale (41) are both located in the transverse direction of the pump shaft.

5. The nuclear power plant primary pump speed probe positioning device of claim 4, wherein, The deflector (421) includes an extension rod (4211) and a flip plate (4212). The flip plate (4212) is rotatably connected to the second bracket (23). The extension rod (4211) is slidably connected to the second bracket (23). One end of the extension rod (4211) is in contact with the positioning frame (24), and the other end of the extension rod (4211) is in contact with one side of the flip plate (4212). The measuring ruler (422) is mounted on the second bracket (23), and the measuring end of the measuring ruler (422) is in contact with the other side of the flip plate (4212).

6. The nuclear power plant primary pump speed probe positioning device of claim 5, wherein, The extension rod (4211) is longitudinally slidably connected to the second bracket (23), and the measuring end of the measuring ruler (422) is laterally set on the second bracket (23). The measuring end of the measuring ruler (422) lifts the extension rod (4211) through the flip plate (4212) so that the extension rod (4211) moves synchronously with the measuring end of the measuring ruler (422).

7. The nuclear power plant primary pump speed probe positioning device of claim 1, wherein, The limiting component (5) includes a magnet (52) and a locking block (53). The locking block (53) is installed on the bearing seat (1), and multiple positioning surfaces (51) are provided on the locking block (53), one of which is arc-shaped. The magnet (52) is installed on the bearing seat (1) and magnetically adsorbs with the pump shaft.

8. The nuclear power plant primary pump speed probe positioning device of claim 7, wherein, The nuclear power plant main pump speed probe positioning device also includes a simulated probe, which is installed on the pump shaft in contact with the positioning groove (21); and / or the magnet (52) is a permanent magnet or an electromagnet.

9. The nuclear power plant primary pump speed probe positioning device of claim 2, wherein, The support base (1) includes: a support plate (12), a slide (13), and a second locking member (14). The slide (13) is slidably connected to the support plate (12), the first bracket (22) is slidably connected to the slide (13), and the second locking member (14) is installed on the slide (13) to limit the distance between the slide (13) and the support plate (12).

10. The nuclear power plant primary pump speed probe positioning device of claim 9, wherein, The first locking member (3) and / or the second locking member (14) are provided with a plurality of anti-slip grooves (7).

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