Auxiliary fixing device for installation of nuclear power plant main pump rotating speed probe
By designing an auxiliary fixing device for installing the main pump speed probe in a nuclear power plant, and utilizing the synergistic effect of the fixed bracket, vertical moving component, and horizontal rotating component, the problems of low installation accuracy and low efficiency of the main pump speed probe were solved, achieving a fast and accurate installation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI FANGCHENGGANG NUCLEAR POWER
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-12
Smart Images
Figure CN224352672U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nuclear reactor auxiliary monitoring technology, and in particular to an auxiliary fixing device for installing a main pump speed probe in a nuclear power plant. Background Technology
[0002] The main pump speed probe is a crucial component of key equipment in nuclear power plants and other industrial sectors. It is used to monitor the main pump speed in real time, ensuring the safe and stable operation of the unit. The installation and adjustment of the main pump speed probe are required when the unit reaches the 25 bar pressure condition. Due to the specific nature of this condition, probe installation must be completed within a specified time window, and this work is typically located on the critical path; any delay could impact the overall project schedule.
[0003] Currently, the installation of main pump speed probes relies primarily on manual operation. Two probes are required for each main pump, and installing multiple main pumps further increases the workload. The probe installation requires extremely high precision, ensuring that the clearance, angle, and axial position between the probe and the speed measuring gear all meet strict technical specifications. Due to a lack of specialized tools, installers must manually measure and adjust various probe parameters and repeatedly calibrate them using temporary fixing devices. This process is time-consuming and prone to measurement errors or installation deviations due to human factors. Furthermore, operating under high-pressure conditions with limited space further increases the difficulty of installation and the risk of personnel fatigue.
[0004] In existing technologies, the fixing of main pump speed probes mainly relies on general-purpose clamps or simple support structures, which cannot achieve rapid and precise adjustments, resulting in low installation efficiency. Furthermore, uncontrollable factors in manual operation may lead to substandard probe installation parameters, or even cause equipment malfunctions, increasing subsequent inspection and maintenance costs. Therefore, there is an urgent need to develop a dedicated installation and fixing tool to improve the accuracy, efficiency, and reliability of main pump speed probe installation, reduce human error, shorten critical path time, and ensure the safe and stable operation of the unit. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide an auxiliary fixing device for installing the main pump speed probe of a nuclear power plant.
[0006] The technical solution adopted by this utility model to solve its technical problem is: an auxiliary fixing device for installing a main pump speed probe in a nuclear power plant, including a fixed bracket fixedly connected to an external bracket, a vertical moving component, a horizontal moving component, a rotating component, and a probe mounting bracket for installing the speed probe. The vertical moving component is fixedly connected to the horizontal moving component, one of the vertical moving component and the horizontal moving component is connected to the fixed bracket, and the other of the vertical moving component and the horizontal moving component is connected to the rotating component. The probe mounting bracket is connected to the rotating component.
[0007] In some embodiments, the vertical moving component includes a vertical fixing member, a first telescopic screw, and a vertical moving member. The first telescopic screw is fixedly mounted on the vertical fixing member. The free end of the first telescopic screw forms a circumferential rotation constraint with the vertical moving member through a bearing structure, and is axially fixed by a limiting structure.
[0008] When the first telescopic screw is rotated, the free end of the first telescopic screw moves axially and drives the vertical moving part to move up or down synchronously.
[0009] In some embodiments, the vertical fixing member includes a fixing block and a fixing adapter, the fixing block is fixedly connected to the fixing bracket, and the fixing adapter is fixedly connected to the fixing block and fixedly installed with the first telescopic screw.
[0010] The vertical moving component includes a vertical moving block and a vertical transmission component. The vertical moving block and the fixed block are slidably connected or spaced apart along the axial direction of the first telescopic screw. The vertical transmission component is fixedly connected to the vertical moving block and forms a circumferential rotation constraint with the free end of the first telescopic screw through a bearing structure, and is fixed to the axial direction of the first telescopic screw through a limiting structure.
[0011] In some embodiments, the lateral movement assembly includes a lateral fixing member, a second telescopic screw, and a lateral movement member. The lateral fixing member is fixedly connected to the vertical movement assembly. The second telescopic screw is fixedly mounted on the lateral fixing member. The free end of the second telescopic screw forms a circumferential rotation constraint with the lateral movement member through a bearing structure, and is axially fixed by a limiting structure.
[0012] When the second telescopic screw is rotated, the free end of the second telescopic screw moves axially and drives the lateral moving part to move forward or backward synchronously.
[0013] In some embodiments, the lateral moving member includes a lateral moving block and a lateral transmission member. The lateral moving block is slidably connected to or spaced apart from the vertical moving component along the axial direction of the second telescopic screw. The lateral transmission member is fixedly connected to the lateral moving block and forms a circumferential rotation constraint with the free end of the second telescopic screw through a bearing structure, and is fixed to the axial direction of the second telescopic screw through a limiting structure.
[0014] In some embodiments, the rotating assembly includes a rotating fixing member, a rotating screw, a connecting member, and a rotating disk. The rotating fixing member is fixedly connected to the lateral movement assembly. The rotating screw is fixedly mounted on the rotating fixing member, and the free end of the rotating screw forms a circumferential rotation constraint with the rotating fixing member through a bearing structure. The first end of the connecting member is fixedly sleeved on the free end of the rotating screw, and the second end of the connecting member is fixedly connected to the rotating disk.
[0015] When the rotating screw is rotated, the connecting member rotates synchronously with the rotating screw, and drives the rotating disk to rotate around the axis of the rotating screw.
[0016] In some embodiments, the probe mounting bracket includes a transmission section, an intermediate connecting section, and a mounting section connected in sequence. The transmission section is fixedly connected to the rotating assembly. The intermediate connecting section is offsetly connected to the transmission section and the mounting section, respectively. The mounting section is positioned closer to the fixed bracket than the transmission section.
[0017] In some embodiments, the mounting section is provided with a mounting groove for placing the speed probe, a plurality of limiting holes for initially positioning the speed probe, and a plurality of mounting holes connected to the screw holes of the speed probe by screws. Each mounting hole and each limiting hole communicates with the mounting groove, and the mounting holes and the limiting holes are located on adjacent surfaces.
[0018] In some embodiments, the transmission section and the intermediate connecting section form an L-shaped structure, and / or the intermediate connecting section and the mounting section form an L-shaped structure.
[0019] In some embodiments, the fixing bracket includes a straight plate and an L-shaped fixing member, wherein the bottom of the straight plate and the L-shaped fixing member are interference-fitted.
[0020] The straight plate is provided with several through holes for fixing the external bracket, and the through holes are located above the bottom of the L-shaped fastener.
[0021] By implementing this utility model, the following beneficial effects can be achieved:
[0022] This utility model discloses an auxiliary fixing device for installing a main pump speed probe in a nuclear power plant. It includes a fixed bracket fixedly connected to an external support, a vertical moving component, a horizontal moving component, a rotating component, and a probe mounting bracket for installing the speed probe. The vertical moving component is fixedly connected to the horizontal moving component. One of the vertical and horizontal moving components is connected to the fixed bracket, and the other of the vertical and horizontal moving components is connected to the rotating component. The probe mounting bracket is connected to the rotating component. The entire fixing device is secured to the main pump by the fixed bracket. The specific position of the probe mounting bracket can be adjusted by the vertical, horizontal, and rotating components, allowing the speed probe to be installed within the mounting bracket. This enables precise adjustment of the speed probe at various angles, quickly completing the fixing and installation of the main pump speed probe. Attached Figure Description
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:
[0024] Figure 1 This is a simplified diagram of an auxiliary fixing device for installing a main pump speed probe in a nuclear power plant, according to one embodiment of this utility model.
[0025] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the auxiliary fixing device for installing the main pump speed probe in a nuclear power plant.
[0026] Figure 3 yes Figure 1 A schematic diagram of the installation auxiliary fixing device for the main pump speed probe in a nuclear power plant.
[0027] Figure 4 This is a schematic diagram showing the cooperation relationship between the main pump, external support, speed probe, and probe.
[0028] Figure 5 yes Figure 3 A schematic diagram illustrating the usage of the auxiliary fixing device for installing the main pump speed probe in a nuclear power plant. Detailed Implementation
[0029] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0030] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.
[0031] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] See Figures 1 to 5 This utility model discloses an auxiliary fixing device for installing a speed probe on a main pump of a nuclear power plant, comprising a fixed bracket 1 fixedly connected to an external bracket 100, a vertical moving component 2, a horizontal moving component 3, a rotating component 4, and a probe mounting bracket 5 for installing a speed probe 200. The vertical moving component 2 and the horizontal moving component 3 are fixedly connected. One of the vertical moving component 2 and the horizontal moving component 3 is connected to the fixed bracket 1, and the other of the vertical moving component 2 and the horizontal moving component 3 is connected to the rotating component 4. The probe mounting bracket 5 is connected to the rotating component 4. The fixed bracket 1 serves as the foundation of the entire installation and fixing device and is used to fix it to the main pump 300. The fixed bracket 1 is connected to the external bracket 100, and the external bracket 100 is fixed to the housing of the main pump 300. The vertical moving component 2 can perform vertical reciprocating motion, the horizontal moving component 3 can perform horizontal reciprocating motion, and the rotating component 4 can perform rotational motion. The probe mounting bracket 5 is used to install the speed probe 200. After the position of the probe mounting bracket 5 is adjusted, the speed probe 200 can be installed. If the position is still not suitable after installing the speed probe 200, further adjustments can be made. Alternatively, before adjusting the probe mounting bracket 5, fix the rotational speed probe 200 on the probe mounting bracket 5 first, and then adjust its position.
[0034] Understandably, the orientation of the vertical reciprocating motion, the lateral reciprocating motion, and the rotational motion are relative. For example, with the main pump 300 as a reference, the vertical moving component 2 can reciprocate along the axial direction of the main pump 300 to adjust the axial position of the probe mounting bracket 5 on the main pump 300. The lateral moving component 3 can reciprocate along a radial direction of the main pump 300 to adjust the height of the probe mounting bracket 5 from the outer surface of the main pump 300. The rotation component 4 can rotate about a parallel axis parallel to the axis of the main pump 300 to adjust the tilt angle between the probe mounting bracket 5 and the outer surface of the main pump 300.
[0035] like Figures 1 to 3 As shown, in some embodiments, the fixing bracket 1 includes a straight plate 11 and an L-shaped fixing member 12, with the bottom of the straight plate 11 and the L-shaped fixing member 12 having an interference fit. The straight plate 11 has a plurality of through holes for fixing the external bracket 100, and the through holes are located above the bottom of the L-shaped fixing member 12. Specifically, the bottom of the L-shaped fixing member 12 is placed and abuts against the external bracket 100, and is connected to the external bracket 100 by a vertical bolt threaded into the through hole, thereby fixing the fixing bracket 1 to the external bracket 100.
[0036] like Figures 1 to 3 As shown, in some embodiments, the vertical moving component 2 includes a vertical fixing member 21, a first telescopic screw 22, and a vertical moving member 23. The first telescopic screw 22 is fixedly installed on the vertical fixing member 21. The free end of the first telescopic screw 22 forms a circumferential rotation constraint with the vertical moving member 23 through a bearing structure, and is fixed axially through a limiting structure. When the first telescopic screw 22 is rotated, the free end of the first telescopic screw 22 moves axially and drives the vertical moving member 23 to move up or down synchronously. Among them, the first telescopic screw 22 is the core driving component of the vertical moving component 2, and its structure includes: a screw body: adopting a precision thread structure, such as a trapezoidal thread or a ball screw, to ensure high-precision axial displacement; a free end: connected to the vertical moving member 23 through a bearing structure, such as a thrust bearing or an angular contact bearing, so that the screw body can smoothly transmit axial force when rotating, while avoiding circumferential rotation interference; and a limiting structure, such as a locking nut or a retaining ring, to prevent the screw body from moving axially and to ensure that the vertical moving member 23 moves only along a preset stroke. Furthermore, the first telescopic screw 22 may be equipped with a displacement scale, and the displacement distance of the vertical moving member 23 can be determined by the scale value. The first telescopic screw 22 is prior art, and its specific structural diagram is not shown.
[0037] In some embodiments, the vertical fixing member 21 includes a fixing block 211 and a fixing adapter 212. The fixing block 211 is fixedly connected to the fixing bracket 1, and the fixing adapter 212 is fixedly connected to the fixing block 211 and fixably mounts the first telescopic screw 22. The vertical moving member 23 includes a vertical moving block 231 and a vertical transmission member 232. The vertical moving block 231 and the fixing block 211 are slidably connected or spaced apart along the axial direction of the first telescopic screw 22. The vertical transmission member 232 is fixedly connected to the vertical moving block 231 and forms a circumferential rotation constraint with the free end of the first telescopic screw 22 through a bearing structure, and is fixed to the axial direction of the first telescopic screw 22 through a limiting structure.
[0038] like Figures 1 to 3 As shown, in some embodiments, the lateral movement component 3 includes a lateral fixing member 31, a second telescopic screw 32, and a lateral movement member 33. The lateral fixing member 31 is fixedly connected to the vertical movement component 2. The second telescopic screw 32 is fixedly mounted on the lateral fixing member 31. The free end of the second telescopic screw 32 forms a circumferential rotation constraint with the lateral movement member 33 through a bearing structure, and is axially fixed by a limiting structure. When the second telescopic screw 32 is rotated, the free end of the second telescopic screw 32 moves axially and drives the lateral movement member 33 to move forward or backward synchronously. The second telescopic screw 32 is the core driving component of the horizontal movement component and has the same structure as the first telescopic screw 22, which will not be described in detail here; its specific structural diagram is not shown. Furthermore, the second telescopic screw 32 may be provided with a displacement scale, and the displacement distance of the lateral movement member 33 can be determined by the scale value.
[0039] In some embodiments, the lateral moving member 33 includes a lateral moving block 331 and a lateral transmission member 332. The lateral moving block 331 is slidably connected to or spaced apart from the vertical moving component 2 along the axial direction of the second telescopic screw 32. The lateral transmission member 332 is fixedly connected to the lateral moving block 331 and forms a circumferential rotation constraint with the free end of the second telescopic screw 32 through a bearing structure, and is fixed to the axial direction of the second telescopic screw 32 through a limiting structure.
[0040] like Figures 1 to 3As shown, in some embodiments, the rotating assembly 4 includes a rotating fixing member 41, a rotating screw 42, a connecting member 43, and a rotating disk 44. The rotating fixing member 41 is fixedly connected to the lateral moving assembly 3. The rotating screw 42 is fixedly mounted on the rotating fixing member 41, and the free end of the rotating screw 42 forms a circumferential rotation constraint with the rotating fixing member 41 through a bearing structure. The first end of the connecting member 43 is fixedly sleeved on the free end of the rotating screw 42, and the second end of the connecting member 43 is fixedly connected to the rotating disk 44. When the rotating screw 42 is rotated, the connecting member 43 rotates synchronously with the rotating screw 42, and drives the rotating disk 44 to rotate around the axis of the rotating screw 42. The rotating screw 42 is the core driving component of the rotating assembly 4. Its structure mainly includes: a screw body, typically employing a precision thread structure such as a trapezoidal thread, ball screw, or ordinary transmission thread, used to convert rotational motion into circumferential rotation of the connecting member 43; a free end, connected to the rotating fixed member 41 via a bearing structure, such as a deep groove ball bearing or angular contact bearing, enabling smooth torque transmission during screw body rotation while reducing friction and axial movement; an interface with the connecting member 43, where the free end is fixedly fitted to the connecting member 43, such as a coupling or flange, ensuring effective torque transmission to the rotating disk 44; and an axial limiting structure, such as a shoulder or retaining ring, to prevent axial displacement of the screw body during rotation, ensuring rotational motion is transmitted to the rotating disk 44. Furthermore, the rotating screw 42 may be equipped with an angle scale, allowing the rotation angle of the rotating disk 44 to be determined by the scale value. The rotating screw 42 is prior art, and its specific structural diagram is not shown.
[0041] like Figures 1 to 3 As shown, in some embodiments, the probe mounting bracket 5 includes a transmission section 51, an intermediate connecting section 52, and a mounting section 53 connected in sequence. The transmission section 51 is fixedly connected to the rotating component 4. The intermediate connecting section 52 is offset from both the transmission section 51 and the mounting section 53. The mounting section 53 is positioned closer to the fixed bracket 1 than the transmission section 51. The transmission section 51 and the intermediate connecting section 52 form an L-shaped structure, and / or the intermediate connecting section 52 and the mounting section 53 form an L-shaped structure. For example, the transmission section 51 and the intermediate connecting section 52 form an L-shaped structure, and simultaneously the intermediate connecting section 52 and the mounting section 53 form an L-shaped structure. This creates a bent and rotating structure, providing sufficient installation space for the vertical moving component 2, the horizontal moving component 3, and the rotating component 4, while saving space and adapting to the installation of the rotational speed probe 200 in narrow spaces.
[0042] In some embodiments, the mounting section 53 is provided with a mounting groove 531 for placing the speed probe 200, a plurality of limiting holes 532 for initially positioning the speed probe 200, and a plurality of mounting holes 533 connected to the screw holes of the speed probe 200 by screws. Each mounting hole 533 and each limiting hole 532 communicates with the mounting groove 531, and the mounting hole 533 and the limiting hole 532 are located on adjacent surfaces. The limiting hole 532 is located at the top of the mounting groove 531, and the speed probe 200 can be secured to the mounting section 53 by fasteners such as locking screws. Under the action of the vertical moving component 2, the horizontal moving component 3, and the rotating component 4, the probe mounting bracket 5 controls the speed probe 200 to move and rotate with precision within a certain displacement range, completing the precise positioning of the mounted speed probe 200, and finally fixing the speed probe 200 through the mounting holes 533 using fasteners such as locking screws.
[0043] like Figure 4 and Figure 5 As shown, the method of using the auxiliary fixing device for installing the main pump speed probe of the nuclear power plant of this utility model is as follows:
[0044] 1. Fix the fixed bracket 1 to the external bracket 100 by connecting the screw to the through hole thread of the straight plate 11.
[0045] 2. Place the speed probe 200 into the mounting groove 531. After it is close to the wall of the mounting groove 531 near the mounting hole 533, connect the limiting hole 532 with the screw thread and press the speed probe 200 to complete the positioning of the speed probe 200.
[0046] 3. Adjust the rotating screw 42 so that the groove of the speed probe 200 and the probe 400 are on the same parallel horizontal plane.
[0047] 4. Adjust the first telescopic screw 22 so that the distance between the bottom wall of the groove side of the speed probe 200 and the probe 400 is 2mm. The bottom wall of the groove side of the speed probe 200 refers to the side wall along the axial direction of the main pump 300 that is close to the first telescopic screw 22. Specifically, the adjustment can be done by first adjusting the first telescopic screw 22 so that the bottom wall of the groove side of the speed probe 200 contacts the bottom side of the probe 400, and then rotating it in the opposite direction, causing the bottom wall of the groove side of the speed probe 200 to move downwards by 2mm, thus completing the vertical displacement adjustment.
[0048] 5. Adjust the second telescopic screw 32 so that the distance between the top of the groove of the speed probe 200 and the top of the probe 400 is 2mm. The top of the groove of the speed probe 200 refers to the wall surface away from the radial direction of the main pump 300. Specifically, the adjustment can be achieved by first adjusting the second telescopic screw 32 until the top of the groove of the speed probe 200 contacts the probe 400, then rotating it in the opposite direction to move the second telescopic screw 32 backward by 2mm, thus completing the horizontal displacement adjustment.
[0049] 6. Insert the screw through the mounting hole 533 on the mounting section 53 and tighten the screw to complete the fastening installation of the speed probe 200.
[0050] Understandably, the probe 400 has been fixed in a specific position by existing technology. The auxiliary fixing device for installing the main pump speed probe of the nuclear power plant of this utility model needs to be set according to the position of the external bracket 100 and the probe 400, so as to fix the speed probe 200.
[0051] By implementing this utility model, the following beneficial effects can be achieved:
[0052] This utility model discloses an auxiliary fixing device for installing a main pump speed probe in a nuclear power plant. The entire installation and fixing device is fixed to the main pump 300 via a fixing bracket 1. The specific position of the probe mounting bracket 5 is adjusted using a vertical moving component 2, a horizontal moving component 3, and a rotating component 4. The speed probe 200 can be installed within the probe mounting bracket 5, allowing for precise adjustment of the speed probe 200 at various angles and quickly completing the fixing and installation of the main pump 300 speed probe 200. It also enables precise adjustment of the gap parameter between the speed probe 200 and the probe 400. The use of the vertical moving component 2, horizontal moving component 3, and rotating component 4 for adjustment avoids the need for equipment such as feeler gauges. This prevents parameter changes caused by manual movement of the speed probe 200 during the original installation process.
[0053] 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, without departing from the concept of the present utility model, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made. These all fall within the protection scope of the present utility model, that is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. 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. An auxiliary fixing device for installing a main pump speed probe in a nuclear power plant, characterized in that, The device includes a fixed bracket (1) fixedly connected to an external bracket (100), a vertical moving component (2), a horizontal moving component (3), a rotating component (4), and a probe mounting bracket (5) for mounting a speed probe (200). The vertical moving component (2) is fixedly connected to the horizontal moving component (3). One of the vertical moving component (2) and the horizontal moving component (3) is connected to the fixed bracket (1), and the other of the vertical moving component (2) and the horizontal moving component (3) is connected to the rotating component (4). The probe mounting bracket (5) is connected to the rotating component (4).
2. The auxiliary fixing device for installing the main pump speed probe of a nuclear power plant according to claim 1, characterized in that, The vertical moving component (2) includes a vertical fixing member (21), a first telescopic screw (22) and a vertical moving member (23). The first telescopic screw (22) is fixedly installed on the vertical fixing member (21). The free end of the first telescopic screw (22) forms a circumferential rotation constraint with the vertical moving member (23) through a bearing structure, and is axially fixed through a limiting structure. When the first telescopic screw (22) is rotated, the free end of the first telescopic screw (22) moves axially and drives the vertical moving part (23) to move up or down synchronously.
3. The auxiliary fixing device for installing the main pump speed probe of a nuclear power plant according to claim 2, characterized in that, The vertical fixing member (21) includes a fixing block (211) and a fixing adapter (212). The fixing block (211) is fixedly connected to the fixing bracket (1), and the fixing adapter (212) is fixedly connected to the fixing block (211) and the first telescopic screw (22) is fixedly installed. The vertical moving component (23) includes a vertical moving block (231) and a vertical transmission component (232). The vertical moving block (231) and the fixed block (211) are slidably connected or spaced apart along the axial direction of the first telescopic screw (22). The vertical transmission component (232) is fixedly connected to the vertical moving block (231) and forms a circumferential rotation constraint with the free end of the first telescopic screw (22) through a bearing structure. It is also fixed to the axial direction of the first telescopic screw (22) through a limiting structure.
4. The auxiliary fixing device for installing the main pump speed probe of a nuclear power plant according to claim 1, characterized in that, The lateral moving component (3) includes a lateral fixing member (31), a second telescopic screw (32), and a lateral moving member (33). The lateral fixing member (31) is fixedly connected to the vertical moving component (2). The second telescopic screw (32) is fixedly installed on the lateral fixing member (31). The free end of the second telescopic screw (32) forms a circumferential rotation constraint with the lateral moving member (33) through a bearing structure, and is axially fixed through a limiting structure. When the second telescopic screw (32) is rotated, the free end of the second telescopic screw (32) moves axially and drives the transverse moving part (33) to move forward or backward synchronously.
5. The auxiliary fixing device for installing the main pump speed probe of a nuclear power plant according to claim 4, characterized in that, The lateral moving component (33) includes a lateral moving block (331) and a lateral transmission component (332). The lateral moving block (331) is slidably connected to or spaced apart from the vertical moving component (2) along the axial direction of the second telescopic screw (32). The lateral transmission component (332) is fixedly connected to the lateral moving block (331) and forms a circumferential rotation constraint with the free end of the second telescopic screw (32) through a bearing structure. It is also fixed to the axial direction of the second telescopic screw (32) through a limiting structure.
6. The auxiliary fixing device for installing the main pump speed probe of a nuclear power plant according to claim 1, characterized in that, The rotating assembly (4) includes a rotating fixing member (41), a rotating screw (42), a connecting member (43), and a rotating disk (44). The rotating fixing member (41) is fixedly connected to the transverse moving assembly (3). The rotating screw (42) is fixedly installed on the rotating fixing member (41), and the free end of the rotating screw (42) forms a circumferential rotation constraint with the rotating fixing member (41) through a bearing structure. The first end of the connecting member (43) is fixedly sleeved on the free end of the rotating screw (42), and the second end of the connecting member (43) is fixedly connected to the rotating disk (44). When the rotating screw (42) is rotated, the connecting piece (43) rotates synchronously with the rotating screw (42) and drives the rotating disk (44) to rotate around the axis of the rotating screw (42).
7. The auxiliary fixing device for installing the main pump speed probe of a nuclear power plant according to any one of claims 1-6, characterized in that, The probe mounting bracket (5) includes a transmission section (51), an intermediate connecting section (52) and a mounting section (53) connected in sequence. The transmission section (51) is fixedly connected to the rotating assembly (4). The intermediate connecting section (52) is offsetly connected to the transmission section (51) and the mounting section (53) respectively. The mounting section (53) is set closer to the fixed bracket (1) than the transmission section (51).
8. The auxiliary fixing device for installing the main pump speed probe of a nuclear power plant according to claim 7, characterized in that, The mounting section (53) is provided with a mounting groove (531) for placing the speed probe (200), a plurality of limiting holes (532) for initially positioning the speed probe (200), and a plurality of mounting holes (533) connected to the screw holes of the speed probe (200) by screws. Each mounting hole (533) and each limiting hole (532) are respectively connected to the mounting groove (531), and the mounting holes (533) and the limiting holes (532) are located on adjacent surfaces.
9. The auxiliary fixing device for installing the main pump speed probe of a nuclear power plant according to claim 7, characterized in that, The transmission section (51) and the intermediate connecting section (52) form an L-shaped structure, and / or the intermediate connecting section (52) and the mounting section (53) form an L-shaped structure.
10. The auxiliary fixing device for installing the main pump speed probe of a nuclear power plant according to any one of claims 1-6, characterized in that, The fixed bracket (1) includes a straight plate (11) and an L-shaped fastener (12), wherein the bottom of the straight plate (11) and the L-shaped fastener (12) are interference-fitted. The straight plate (11) is provided with a plurality of through holes for fixing the external bracket (100), and the through holes are located above the bottom of the L-shaped fastener (12).