Static isolation device for nuclear power plant
By using an electrostatic isolation device with insulated base and locking components in a nuclear power plant, the electrostatic isolation problem between the vibration probe and mechanical equipment is solved, and the electrostatic isolation and high torsion resistance are achieved, which improves the installation reliability of the equipment and reduces the failure rate.
Patent Information
- Application Number
- CN202421689317.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The vibration probe of nuclear power plant is not electrostatically isolated from mechanical equipment, resulting in electrostatic interference affecting the operation of the probe, and the existing insulating materials have poor torsional strength, affecting the installation reliability.
Design a nuclear power plant electrostatic isolation device, which uses an insulating base made of insulating material, connects the vibration probe and the pump body, and achieves high torsion resistance through locking components, including probe connectors, pump body connectors and locking components to ensure electrostatic isolation and stable connection.
The electrostatic isolation between the vibration probe and the pump body is achieved, the equipment failure rate is reduced, the installation reliability is improved, the electrostatic interference is avoided, and the high torsion resistance is ensured.
Smart Images
Figure CN223142187U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electrostatic isolation in nuclear power plants, in particular to an electrostatic isolation device for nuclear power plants. Background Art
[0002] The vibration signals of important pumps and motors in nuclear power plants are directly involved in equipment linkage. If an important pump is shut down due to mis-triggering of the equipment vibration signal, it will cause the unit to trip and the reactor to trip, resulting in significant economic losses and affecting nuclear safety.
[0003] The following design deficiencies have been found in the current vibration probes of nuclear power plants during use:
[0004] 1. There is no electrostatic isolation base between the vibration probe and the mechanical equipment. The static electricity of the mechanical equipment is transmitted to the vibration probe through the shell, affecting the normal operation of the probe.
[0005] 2. The electrostatic isolation base made of the current insulating material has poor torsional strength, and the vibration probe cannot be installed according to the torque standard of the manufacturer, affecting the installation reliability of the probe. Content of the Utility Model
[0006] The technical problem to be solved by the utility model is to provide an electrostatic isolation device for nuclear power plants.
[0007] The technical solution adopted by the utility model to solve its technical problem is to construct an electrostatic isolation device for nuclear power plants, which is used to connect a vibration probe and a pump body. It includes an insulating base made of insulating material, a probe connector connected to the vibration probe, a pump body connector connected to the pump body, and a locking component;
[0008] The insulating base is provided with a first positioning groove for installing the probe connector and a second positioning groove for installing the pump body connector, and the first positioning groove and the second positioning groove are separated;
[0009] The locking component is connected to the insulating base to lock the probe connector or the pump body connector.
[0010] In some embodiments, the insulating base is provided with a first communication hole and a second communication hole. The first communication hole is communicated with the first positioning groove, and the second communication hole is communicated with the second positioning groove.
[0011] In some embodiments, the probe connector includes a probe connection main body accommodated in the first positioning groove and a probe connection part integrally formed with the probe connection main body and used for connecting the vibration probe;
[0012] The probe connection part is provided with a first external thread part.
[0013] In some embodiments, a first connection hole is formed in the probe connection body, and the locking assembly includes a first fastener connected to the insulating base and arranged to match the first connection hole;
[0014] The first fastener passes through the first communication hole.
[0015] In some embodiments, the diameter of the probe connection body is 20.1 mm, the diameter of the first positioning groove is 20 mm, the axial length of the first positioning groove is 9 mm, and the axial length of the probe connection body is 8 mm.
[0016] In some embodiments, the pump body connector includes a pump body connection body received in the second positioning groove and a pump body connection part integrally formed with the pump body connection body and used for connecting the pump body;
[0017] A second external thread part is provided on the pump body connection part.
[0018] In some embodiments, a second connection hole is formed in the pump body connection body, and the locking assembly includes a second fastener connected to the insulating base and arranged to match the second connection hole;
[0019] The second fastener passes through the second communication hole.
[0020] In some embodiments, the diameter of the pump body connection body is 20.1 mm, the diameter of the second positioning groove is 20 mm, the axial length of the second positioning groove is 9 mm, and the axial length of the pump body connection body is 8 mm.
[0021] In some embodiments, the cross-sectional shape of the insulating base is rectangular, circular or hexagonal.
[0022] In some embodiments, the first positioning groove and the second positioning groove are coaxially arranged.
[0023] Implementing the present utility model has the following beneficial effects: The vibration probe and the pump body can be connected through this electrostatic isolation device for nuclear power plants. Since the insulating base is made of insulating material, electrostatic isolation between the vibration probe and the pump body can be achieved, avoiding electrostatic interference, reducing the equipment failure rate, and installing the probe connector and the pump body connector in the insulating base, and at the same time using the locking assembly to lock the probe connector and the pump body connector, achieving high anti-torsion characteristics and improving the installation reliability. Description of the Drawings
[0024] To more clearly illustrate the technical solution of the present 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 the present utility model, and thus should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings. In the drawings:
[0025] Figure 1 is a schematic diagram of the component decomposition structure of the electrostatic isolation device of the nuclear power plant of the present utility model;
[0026] Figure 2 is the main view of the structure of the insulating base of the present utility model;
[0027] Figure 3 is the top view of the structure of the insulating base of the present utility model;
[0028] Figure 4 is the schematic diagram of the structure of the probe connector of the present utility model;
[0029] Figure 5 is the schematic diagram of the structure of the pump body connector of the present utility model. Detailed implementation manners
[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the detailed implementation manners of the present utility model will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings and are constructed and operated in a specific orientation, only for the convenience of describing the present technical solution, rather than indicating that the indicated device or element must have a specific orientation, and thus should not be construed as a limitation of the present utility model.
[0031] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "connection", "linkage", "fixation", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. When a component is referred to as "above" or "below" another component, the component can be "directly" or "indirectly" located above the other component, or there may also be one or more intermediate components. The terms "first", "second", "third", etc. are only for the convenience of describing the technical solution, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. can explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0032] Referring to Figures 1 to 5 , it is an electrostatic isolation device for a nuclear power plant in some embodiments of the present utility model, which is used to connect a vibration probe and a pump body. The electrostatic isolation device for a nuclear power plant can be used for vibration measurement of the pump body and the motor in a nuclear power plant, and can also be applied to vibration monitoring of equipment in other industrial fields. As Figure 1 shown, the electrostatic isolation device for a nuclear power plant is composed of an insulating base 1 made of insulating material, a probe connector 2 connected to the vibration probe, a pump body connector 3 connected to the pump body, and a locking assembly 4. The insulating base 1 is provided with a first positioning groove 11 for installing the probe connector 2 and a second positioning groove 12 for installing the pump body connector 3. The first positioning groove 11 and the second positioning groove 12 are separated. The locking assembly 4 is connected to the insulating base 1 to lock the probe connector 2 or the pump body connector 3. Among them, the insulating base 1 can be made of polytetrafluoroethylene material, and the probe connector 2 and the pump body connector 3 are made of stainless steel material.
[0033] It can be understood that the vibration probe and the pump body can be connected through this electrostatic isolation device for a nuclear power plant. Since the insulating base 1 is made of insulating material, electrostatic isolation between the vibration probe and the pump body can be achieved, avoiding electrostatic interference, reducing the equipment failure rate, and installing the probe connector 2 and the pump body connector 3 in the insulating base 1. At the same time, the locking assembly 4 is used to lock the probe connector 2 and the pump body connector 3 to achieve high anti-torsion characteristics and improve the installation reliability.
[0034] As Figure 2As shown, a first communication hole 13 and a second communication hole 14 are formed in the insulating base 1. The first communication hole 13 communicates with the first positioning groove 11, and the second communication hole 14 communicates with the second positioning groove 12. In this embodiment, both the first communication hole 13 and the second communication hole 14 are countersunk conical holes, which are used for the locking assembly 4 to pass through and be installed. More specifically, the number of both the first communication hole 13 and the second communication hole 14 is two, and the two first communication holes 13 and the second communication holes 14 are symmetrically arranged about the central axis of the insulating base 1.
[0035] As Figure 4 shown, the probe connector 2 includes a probe connection main body 21 accommodated in the first positioning groove 11 and a probe connection part 22 integrally formed with the probe connection main body 21 and used for connecting the vibration probe. A first external thread part is provided on the probe connection part 22. The first external thread part is preferably an M8 thread to facilitate connection with the vibration probe.
[0036] In addition, a first connection hole 211 is formed in the probe connection main body 21. The locking assembly 4 includes a first fastener 41 connected to the insulating base 1 and arranged to match the first connection hole 211. The first fastener 41 passes through the first communication hole 13. The first connection hole 211 is preferably an M4 threaded hole, and the first fastener 41 can be a bolt, which can pass through the first communication hole 13 and be threadedly connected to the first connection hole 211 to realize the locking of the probe connection main body 21. The number of the first fasteners 41 is two.
[0037] The diameter of the probe connection main body 21 is 20.1 mm, and the diameter of the first positioning groove 11 is 20 mm. The probe connection main body 21 is made of a rigid material, while the insulating base 1 is made of a plastic insulating material. When the probe connection main body 21 is installed in the first positioning groove 11, an interference fit is formed between the probe connection main body 21 and the first positioning groove 11, ensuring the firm and stable connection between the probe connection main body 21 and the insulating base 1. In addition, the axial length of the first positioning groove 11 is 9 mm, and the axial length of the probe connection main body 21 is 8 mm to ensure that the probe connection main body 21 can be completely installed in the first positioning groove 11.
[0038] As Figure 5 shown, the pump body connector 3 includes a pump body connection main body 31 accommodated in the second positioning groove 12 and a pump body connection part 32 integrally formed with the pump body connection main body 31 and used for connecting the pump body. A second external thread part is provided on the pump body connection part 32. The second external thread part is preferably an M10 thread.
[0039] A second connection hole 311 is formed in the pump body connection main body 31. The locking assembly 4 includes a second fastener 42 connected to the insulating base 1 and arranged to match the second connection hole 311. The second fastener 42 passes through the second communication hole 14. The second connection hole 311 is preferably an M4 threaded hole, and the second fastener 42 is also a bolt. The number of the second fasteners 42 is two.
[0040] In addition, the diameter of the pump body connection main body 31 is 20.1 mm, the diameter of the second positioning groove 12 is 20 mm, the axial length of the second positioning groove 12 is 9 mm, and the axial length of the pump body connection main body 31 is 8 mm. In this embodiment, the first positioning groove 11 and the second positioning groove 12 are coaxially arranged, and the sizes of the first positioning groove 11 and the second positioning groove 12 are the same. The sizes of the probe connection main body 21 and the pump body connection main body 31 are the same. The insulating base 1 is generally symmetrically arranged, which facilitates the use of the insulating base 1. It can be used whether the insulating base 1 is placed face up or face down.
[0041] The cross-sectional shape of the insulating base 1 is rectangular, circular or hexagonal. In some other embodiments, the cross-sectional shape of the insulating base 1 can also be octagonal, oval or other shapes, which are not specifically limited here.
[0042] It can be understood that the above embodiments only represent the preferred embodiments of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.
Claims
1. An electrostatic isolation device for a nuclear power plant, which is used to connect a vibration probe and a pump body, and is characterized in that, It includes an insulating base (1) made of insulating material, a probe connector (2) connected to the vibration probe, a pump body connector (3) connected to the pump body, and a locking assembly (4); The insulating base (1) is provided with a first positioning groove (11) for installing the probe connector (2) and a second positioning groove (12) for installing the pump body connector (3), and the first positioning groove (11) and the second positioning groove (12) are separated; The locking assembly (4) is connected to the insulating base (1) to lock the probe connector (2) or the pump body connector (3).
2. The electrostatic isolation device for a nuclear power plant according to claim 1, characterized in that, A first communication hole (13) and a second communication hole (14) are formed on the insulating base (1), the first communication hole (13) communicates with the first positioning groove (11), and the second communication hole (14) communicates with the second positioning groove (12).
3. The electrostatic isolation device for a nuclear power plant according to claim 2, wherein The probe connector (2) includes a probe connection main body (21) accommodated in the first positioning groove (11) and a probe connection part (22) integrally formed with the probe connection main body (21) and used for connecting the vibration probe; The probe connection part (22) is provided with a first external thread part.
4. The electrostatic isolation device for nuclear power plant according to claim 3, wherein A first connection hole (211) is formed on the probe connection main body (21), and the locking assembly (4) includes a first fastener (41) connected to the insulating base (1) and arranged to match the first connection hole (211); The first fastener (41) passes through the first communication hole (13).
5. The electrostatic isolation device for a nuclear power plant according to claim 3, wherein The diameter of the probe connection main body (21) is 20.1 mm, the diameter of the first positioning groove (11) is 20 mm, the axial length of the first positioning groove (11) is 9 mm, and the axial length of the probe connection main body (21) is 8 mm.
6. The electrostatic isolation device for nuclear power plants according to claim 2, characterized in that, The pump body connector (3) includes a pump body connection main body (31) accommodated in the second positioning groove (12) and a pump body connection part (32) integrally formed with the pump body connection main body (31) and used for connecting the pump body; The pump body connection part (32) is provided with a second external thread part.
7. The electrostatic isolation device for a nuclear power plant according to claim 6, wherein A second connection hole (311) is formed on the pump body connection main body (31), and the locking assembly (4) includes a second fastener (42) connected to the insulating base (1) and arranged to match the second connection hole (311); The second fastener (42) passes through the second communication hole (14).
8. The electrostatic isolation device for a nuclear power plant according to claim 6, characterized in that, The diameter of the pump body connection main body (31) is 20.1 mm, the diameter of the second positioning groove (12) is 20 mm, the axial length of the second positioning groove (12) is 9 mm, and the axial length of the pump body connection main body (31) is 8 mm.
9. The electrostatic isolation device for a nuclear power plant according to claim 1, wherein The cross-sectional shape of the insulating base (1) is rectangular, circular or hexagonal.
10. The electrostatic isolation device for nuclear power plant according to claim 1, wherein The first positioning groove (11) and the second positioning groove (12) are coaxially arranged.