High-strength fastener for nuclear power reactor internals

Abstract

The utility model discloses a high-strength fastener for nuclear power reactor internals, which comprises an upper fastener, the lower end of the upper fastener is provided with threaded cylinders at the inner sides of the left end and the right end, and during installation, the threaded cylinders at the lower end of the upper fastener are inserted into the inner position of a total passing round hole of the lower fastener. The gasket is inserted from the lower end position of the stainless steel bolt, so that the threaded cylinder and the stainless steel bolt are connected to the inner side position in a sleeving manner, the nut B can be connected to the lower end position of the threaded cylinder and rotate along the outer wall position of the threaded cylinder, and finally the nut A is connected to the lower end position of the stainless steel bolt; when the bolt is loosened, the nut A is rotated to be tightly attached to the gasket, at the moment, the nut A wraps the nut B at the inner side position through the groove in the inner position, through the connection mode, in the vibration environment, the higher anti-loosening capacity is provided, and the bolt can be effectively prevented from loosening.

Description

Technical Field

[0001] This utility model belongs to the technical field of high-strength fasteners for nuclear power reactor internals, specifically relating to a high-strength fastener for nuclear power reactor internals. Background Technology

[0002] High-strength fasteners for nuclear power plant internals refer to special fasteners used inside the nuclear power plant reactor. These fasteners are typically made of high-strength alloy materials and can withstand extreme temperature, pressure, and radiation environments. They are designed to ensure the safety and stability of reactor components and prevent loosening or failure during operation. The reliability and durability of these fasteners are crucial to the safe operation of nuclear power plants, and therefore, strict standards and specifications are followed in their manufacturing and material selection.

[0003] Traditional nuclear power reactor internal components use high-strength fasteners, but when used in vibration environments, these fasteners may loosen, thus failing to meet the requirements of high-intensity working conditions. This loosening not only affects the stability of the connection but may also pose a potential threat to the safety of the reactor. Therefore, the market needs a new connection method to solve the current problems. Utility Model Content

[0004] The purpose of this invention is to provide a high-strength fastener for nuclear power reactor internals, in order to solve the problem mentioned in the background art that the traditional high-strength fasteners for nuclear power reactor internals may loosen under vibration, thus failing to meet the requirements of high-strength working conditions. This loosening not only affects the stability of the connection, but may also pose a potential threat to the safety of the reactor. Therefore, the market needs a new connection method to solve the current problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-strength fastener for nuclear power reactor internal components, comprising an upper fastener, a threaded cylinder provided at the lower end of the upper fastener on the inner side of both the left and right ends, a lower fastener installed at the lower end of the upper fastener, and through holes provided at the upper end of the lower fastener on both the left and right ends. When the upper fastener is installed with the rubber strip, the threaded cylinder is inserted into the through hole. A washer is fitted at the lower part of the outer wall of the threaded cylinder. A nut B is installed at the lower part of the outer wall of the threaded cylinder. A stainless steel bolt is provided at the inner wall of the threaded cylinder. A nut A is provided at the lower part of the outer wall of the stainless steel bolt. A groove is provided inside the nut A. Multiple reinforcing ribs are fixed at the outer walls of the upper and lower fasteners. Rubber strips are fitted at the outer walls of both the upper and lower fasteners.

[0006] Preferably, the reinforcing rib is snapped into the inside of the adhesive strip.

[0007] Preferably, when the upper and lower fasteners are installed, the threaded cylinder is inserted into the internal position of the circular hole, and the outer and inner walls of the threaded cylinder are provided with threaded structures.

[0008] Preferably, the stainless steel bolt is rotated into the inner wall of the threaded cylinder until it is tightly fitted with the upper end of the upper fastener.

[0009] Preferably, the washer is inserted from the lower end of the stainless steel bolt, and the stainless steel bolt and the threaded sleeve are fitted on the inner side.

[0010] Preferably, the nut B rotates from the lower end of the threaded cylinder, and rotates along the threaded structure on the outer wall of the threaded cylinder. The nut B rotates until it is in close contact with the washer, and the washer is squeezed by the nut B, so that the washer is tightly attached to the lower end of the lower fastener.

[0011] Preferably, the nut A is rotated from the lower end of the stainless steel bolt until the nut A and the washer are tightly fitted together, and the nut A covers the nut B inside through the groove in its internal position.

[0012] Preferably, the reinforcing ribs are evenly distributed on the outer walls of the upper and lower fasteners, and the adhesive strip is fitted onto the outer walls of the upper and lower fasteners, so that the reinforcing ribs are engaged with the inner part of the adhesive strip.

[0013] Compared with the prior art, this utility model provides a high-strength fastener for nuclear power reactor internals, which has the following advantages:

[0014] 1. The fasteners of this device consist of an upper fastener and a lower fastener. The upper and lower fasteners are spliced ​​together to form a complete fastener structure. During installation, the threaded sleeve at the lower end of the upper fastener is inserted into the through hole of the lower fastener. The outer and inner walls of the threaded sleeve are threaded. The stainless steel bolt is rotated from the upper end of the threaded sleeve to connect with the inner thread of the threaded sleeve. The stainless steel bolt is rotated until it is flush against the upper end of the upper fastener. The washer is placed from the lower end of the stainless steel bolt. Insert the threaded cylinder and stainless steel bolt into the inner position. Connect nut B to the lower end of the threaded cylinder and rotate it along the outer wall of the cylinder until it fits tightly against the washer. Finally, connect nut A to the lower end of the stainless steel bolt and rotate it until it fits tightly against the washer. At this point, nut A, through the groove in its inner position, wraps nut B inside the cylinder. This connection method provides stronger resistance to loosening under vibration and effectively prevents the bolt from loosening.

[0015] 2. Multiple reinforcing ribs are provided on the outer wall of the clamp. A rubber strip is fitted on the outer wall of the clamp. The reinforcing ribs are inserted into the inside of the rubber strip. The presence of the reinforcing ribs can effectively restrict the movement of the rubber strip, ensuring that the rubber strip remains in the predetermined position during use and preventing displacement of the rubber strip due to external force. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a high-strength fastener structure for internal components of a nuclear power plant according to the present invention.

[0017] Figure 2 This is a schematic diagram of a split structure of a high-strength fastener for internal components of a nuclear power plant according to the present invention.

[0018] Figure 3 This is a cross-sectional structural diagram of a high-strength fastener for internal components of a nuclear power plant according to the present invention.

[0019] Figure 4 This is a schematic diagram of a high-strength fastener nut A for nuclear power reactor internal components according to the present invention.

[0020] In the diagram: 1. Upper fastener; 2. Rubber strip; 3. Stainless steel bolt; 4. Nut A; 5. Lower fastener; 6. Groove; 7. Nut B; 8. Threaded cylinder; 9. Through round hole; 10. Reinforcing rib; 11. Washer. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0024] The utility model provides, for example Figure 1-4 The high-strength fastener for nuclear power reactor internals shown includes an upper fastener 1. A threaded cylinder 8 is provided at the lower end of the upper fastener 1, located on the inner sides of both the left and right sides. A lower fastener 5 is installed at the lower end of the upper fastener 1. A through-hole 9 is provided at the upper end of the lower fastener 5, located on both the left and right sides. When installing the upper fastener 1 and the rubber strip 2, the threaded cylinder 8 is inserted into the through-hole 9. A washer 11 is fitted onto the lower part of the outer wall of the threaded cylinder 8. A nut B7 is installed on the lower part of the outer wall of the threaded cylinder 8. A stainless steel bolt 3 is provided on the inner wall of the threaded cylinder 8. A nut A4 is provided on the lower part of the outer wall of the stainless steel bolt 3. A groove 6 is provided inside the nut A4. Multiple reinforcing ribs 10 are fixed to the outer walls of the upper fastener 1 and the lower fastener 5. A rubber strip 2 is fitted onto the outer walls of both the upper fastener 1 and the lower fastener 5.

[0025] Clamping fasteners are commonly used to connect coolant pipelines, ensuring the pipeline's sealing and stability under high temperature and pressure environments. Coolant pipelines connect to the inlet and outlet of the nuclear power reactor pressure vessel to introduce coolant into the reactor core and remove generated heat. During installation, the threaded cylinder 8 at the lower end of the upper fastener 1 is inserted into the through hole 9 of the lower fastener 5. The outer and inner walls of the threaded cylinder 8 are threaded. The stainless steel bolt 3 is rotated from the upper end of the threaded cylinder 8, causing the stainless steel bolt 3 to engage with the inner wall of the threaded cylinder 8. To connect the threaded structure, rotate the stainless steel bolt 3 until it is tightly against the upper end of the fastener 1. Insert the washer 11 from the lower end of the stainless steel bolt 3 so that the threaded cylinder 8 and the stainless steel bolt 3 are fitted on the inner side. Connect the nut B7 to the lower end of the threaded cylinder 8 and rotate it along the outer wall of the threaded cylinder 8 until it is tightly fitted with the washer 11. Finally, connect the nut A4 from the lower end of the stainless steel bolt 3 and rotate the nut A4 until it is tightly fitted with the washer 11. The installation is now complete.

[0026] like Figure 1 and Figure 3 As shown, the reinforcing rib 10 is snapped into the inner position of the rubber strip 2. When the upper fastener 1 and the lower fastener 5 are installed, the threaded cylinder 8 is inserted into the inner position of the round hole 9. The outer and inner walls of the threaded cylinder 8 are provided with threaded structures. The reinforcing rib 10 is evenly distributed on the outer wall positions of the upper fastener 1 and the lower fastener 5. The rubber strip 2 is sleeved on the outer wall positions of the upper fastener 1 and the lower fastener 5, so that the reinforcing rib 10 is snapped into the inner position of the rubber strip 2.

[0027] The rubber strip 2 is tightly attached to the outer wall of the pipe connection, providing a good sealing effect to prevent fluid leakage. During installation, the presence of the reinforcing rib 10 effectively restricts the movement of the rubber strip 2, ensuring that the rubber strip 2 remains in the predetermined position during installation and preventing displacement of the rubber strip 2 due to external forces.

[0028] like Figure 2 and Figure 4As shown, the stainless steel bolt 3 is inserted into the inner wall of the threaded cylinder 8 by rotation. The stainless steel bolt 3 rotates until it is tightly fitted with the upper end of the upper fastener 1. The washer 11 is inserted from the lower end of the stainless steel bolt 3, and the stainless steel bolt 3 and the threaded cylinder 8 are fitted on the inner side. The nut B7 rotates from the lower end of the threaded cylinder 8. The nut B7 rotates along the thread structure on the outer wall of the threaded cylinder 8 until it is tightly fitted with the washer 11. The washer 11 is squeezed by the nut B7, so that the washer 11 is tightly fitted with the lower end of the lower fastener 5. The nut A4 rotates from the lower end of the stainless steel bolt 3 until the nut A4 is tightly fitted with the washer 11. The nut A4 covers the nut B7 inside through the groove 6 in the inner position.

[0029] When nut B7 is connected to threaded cylinder 8, it rotates clockwise. When nut A4 is connected to stainless steel bolt 3, it rotates counterclockwise. Nut A4 can wrap nut B7 inside through the groove 6 in its internal position, so that nut A4 can rotate to fit tightly against washer 11.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-strength fastener for internal components of a nuclear power reactor, characterized in that, The device includes an upper fastener (1), with a threaded cylinder (8) located on the inner side of the left and right ends at the lower end of the upper fastener (1). A lower fastener (5) is installed at the lower end of the upper fastener (1), and a through hole (9) is provided on the upper end of the lower fastener (5) located on the left and right sides. When the upper fastener (1) is installed with the rubber strip (2), the threaded cylinder (8) is inserted into the inside of the through hole (9). A gasket (11) is fitted onto the lower part of the outer wall of the threaded cylinder (8). The outer wall of the threaded cylinder (8) is fitted with a nut B (7) at the lower position. A stainless steel bolt (3) is provided at the inner wall of the threaded cylinder (8). A nut A (4) is provided at the lower position on the outer wall of the stainless steel bolt (3). A groove (6) is provided inside the nut A (4). Multiple reinforcing ribs (10) are fixed at the outer wall positions of the upper fastener (1) and the lower fastener (5). A rubber strip (2) is sleeved on the outer wall positions of both the upper fastener (1) and the lower fastener (5).

2. The high-strength fastener for nuclear power reactor internals according to claim 1, characterized in that: The reinforcing rib (10) is snapped into place inside the rubber strip (2).

3. A high-strength fastener for nuclear power reactor internals according to claim 1, characterized in that: When the upper fastener (1) and the lower fastener (5) are installed, the threaded cylinder (8) is inserted into the internal position of the circular hole (9). The outer wall and inner wall of the threaded cylinder (8) are provided with threaded structures.

4. A high-strength fastener for nuclear power reactor internals according to claim 3, characterized in that: The stainless steel bolt (3) is rotated into the inner wall of the threaded cylinder (8) and rotated to fit tightly against the upper end of the upper fastener (1).

5. A high-strength fastener for nuclear power reactor internals according to claim 4, characterized in that: The gasket (11) is inserted from the lower end of the stainless steel bolt (3) to fit the stainless steel bolt (3) and the threaded sleeve (8) on the inner side.

6. A high-strength fastener for nuclear power reactor internals according to claim 4, characterized in that: The nut B (7) rotates from the lower end of the threaded cylinder (8). The nut B (7) rotates along the threaded structure on the outer wall of the threaded cylinder (8). The nut B (7) rotates until it is in close contact with the washer (11). The washer (11) is squeezed by the nut B (7), so that the washer (11) is in close contact with the lower end of the lower fastener (5).

7. A high-strength fastener for nuclear power reactor internals according to claim 3, characterized in that: The nut A (4) is rotated from the lower end of the stainless steel bolt (3) until the nut A (4) and the washer (11) are tightly fitted together. The nut A (4) covers the nut B (7) inside through the groove (6) at the inner position.

8. A high-strength fastener for nuclear power reactor internals according to claim 1, characterized in that: The reinforcing ribs (10) are evenly distributed on the outer wall of the upper fastener (1) and the lower fastener (5). The rubber strip (2) is sleeved on the outer wall of the upper fastener (1) and the lower fastener (5), so that the reinforcing ribs (10) are snapped into the inner position of the rubber strip (2).

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