High-temperature-resistant composite coating anti-loosening nuclear power equipment nut

Abstract

The utility model provides a kind of high-temperature-resistant composite coating anti-loosening nuclear power equipment nut, it is related to locking nut technical field, including: connecting screw rod, the outer end surface of connecting screw rod is equipped with thread, the outer end surface of connecting screw rod is equipped with first clamping groove;Nut, the nut is hexagonal structure, the outer end surface of nut is equipped with slot.The utility model among them, when the second clamping groove of nut main body inner end surface and the first clamping groove of the outer end surface of connecting screw rod mutually align, the vertical board part of anti-loosening clamping block can be accurately connected in the first clamping groove of connecting screw rod surface, the lower end of anti-loosening clamping block is then clamped in the lower end part of second clamping groove, prevent nut main body from appearing loose or rotating due to the vibration, impact of equipment, solve the problem that the poor tightness of nut, when corrosive medium enters the inside of nut and screw rod, material performance can deteriorate, and frequent vibration can make nut prone to looseness even fall off after being used for a period of time.

Description

Technical Field

[0001] This utility model relates to the field of locking nut technology, and in particular to a high-temperature resistant composite coating anti-loosening nut for nuclear power equipment. Background Technology

[0002] In the nuclear power field, the safe and stable operation of equipment is of paramount importance, and various connecting components play a crucial supporting role in this process. Nuts and screws, as commonly used connecting and fastening elements, are widely used in the assembly and connection of many components of nuclear power equipment.

[0003] However, existing nuclear power equipment nuts have gradually revealed many problems in actual use:

[0004] On the one hand, nuclear power equipment operates in extremely harsh environments, often facing high temperatures, high pressures, and various corrosive media. When corrosive media enter the nut and screw, the material properties are prone to deterioration.

[0005] On the other hand, nuclear power equipment inevitably generates external forces such as vibration and impact during operation. Traditional nuts often lack effective anti-loosening designs, which makes the nuts prone to loosening or even falling off after a period of use. Once this happens, it may lead to leakage at the equipment connection. Utility Model Content

[0006] This utility model relates to a high-temperature resistant composite coating anti-loosening nut for nuclear power equipment, which solves the problems of poor nut sealing, material deterioration when corrosive media enter the nut and screw, and frequent vibration causing the nut to loosen or even fall off after a period of use.

[0007] This utility model provides a high-temperature resistant composite coating anti-loosening nut for nuclear power equipment, specifically including: a connecting screw;

[0008] The outer end face of the connecting screw is threaded, and the outer end face of the connecting screw is provided with a first groove.

[0009] The nut has a hexagonal structure, with a slot on the outer end face and a first connecting groove on the lower end face;

[0010] The nut body has a threaded hole inside and a second connecting groove on the upper end face of the nut body. A second rubber strip is attached inside the second connecting groove.

[0011] The anti-detachment block has an L-shaped main body, and the vertical plate of the anti-detachment block is engaged in the first slot on the surface of the connecting screw.

[0012] Furthermore, the outer end face of the nut is uniformly equipped with resistance strips, and the outer end face of the resistance strips has an arc-shaped structure.

[0013] Furthermore, a through hole is provided at the middle position of each outer end face of the nut, and a first rubber strip is attached to the first connecting groove on the lower end face of the nut.

[0014] Furthermore, a second slot is provided on the inner end face of the nut body. The second slot body has an L-shaped structure, and a limit block is fixedly installed on the inner end face of the second slot. The outer end face of the limit block is set in an inclined structure.

[0015] Furthermore, when the second groove on the inner end face of the nut body is aligned with the first groove on the outer end face of the connecting screw, the anti-disengagement block is engaged in the first groove and the second groove, and the horizontal plate at the lower end of the anti-disengagement block is engaged in the lower part of the second groove.

[0016] Furthermore, two magnets are provided on the upper end face of the lower horizontal plate of the anti-detachment block. The magnets are attached to the lower end face of the second slot on the surface of the nut body, and a stop block is installed on the surface of the anti-detachment block.

[0017] This utility model provides a high-temperature resistant composite coating anti-loosening nut for nuclear power equipment, which has the following beneficial effects:

[0018] 1. The anti-loosening block has an L-shaped structure. When the second groove on the inner end face of the nut body is aligned with the first groove on the outer end face of the connecting screw, the vertical plate of the anti-loosening block can be precisely engaged in the first groove on the surface of the connecting screw. The horizontal plate at the lower end of the anti-loosening block is engaged in the lower part of the second groove, preventing the nut body from loosening or rotating due to external forces such as vibration and impact during equipment operation, thus ensuring the stability of the connection.

[0019] 2. Two magnets are provided on the upper end face of the lower horizontal plate of the anti-loosening block. After the anti-loosening block is inserted into the slot, the magnets are attached to the lower end face of the second slot on the surface of the nut body. With the attraction force generated by the magnets, the connection between the anti-loosening block and the nut body is further enhanced, making it less likely for the anti-loosening block to shift or fall out in the slot.

[0020] 3. A limiting block is fixedly installed in the second slot on the inner end face of the nut body, and the outer end face of the limiting block is inclined. When installing the anti-loosening block, the inclined limiting block plays a guiding and auxiliary positioning role, making it easy for the anti-loosening block to be accurately inserted into the appropriate position in the slot.

[0021] 4. A first rubber strip is attached to the first connecting groove on the lower end face of the nut, and a second rubber strip is attached to the second connecting groove on the upper end face of the nut body. After the nut body and the connecting screw are tightened, these rubber strips will be squeezed and deformed. On the one hand, they can fill the tiny gaps between the components, play a sealing role, and prevent external dust, moisture and other impurities from entering the connection part. For the special environment where nuclear power equipment is located, this can effectively protect the connection part from corrosion. On the other hand, after the rubber strip is squeezed, a large frictional force is generated between it and the contact surface. When an external force attempts to loosen the nut, this frictional force can hinder the rotation of the nut body and help enhance the overall anti-loosening performance.

[0022] 5. The outer end face of the nut is evenly equipped with resistance strips, and the outer end face of the resistance strips is arc-shaped. During use, when it is necessary to tighten or loosen the nut, the arc-shaped resistance strips make it easier for the hand or tool to apply force. Each outer end face of the nut has a through hole in the middle. In some special installation or disassembly operation scenarios, tools can be inserted into the through holes to help workers tighten the nut. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0024] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0025] In the attached diagram:

[0026] Figure 1 A schematic diagram of the overall device structure of this utility model is shown;

[0027] Figure 2 This invention provides a schematic cross-sectional view of the nut body of the present invention.

[0028] Figure 3 A schematic diagram of the connecting screw and nut structure of this utility model is shown;

[0029] Figure 4 A schematic diagram of the main structure of the anti-loosening block and nut of this utility model is shown;

[0030] Figure 5 A schematic diagram of the first connecting groove on the surface of the connecting screw of this utility model is shown;

[0031] Figure 6 A schematic diagram of the nut surface slot structure of this utility model is shown;

[0032] Figure 7 A schematic diagram of the anti-detachment locking block structure of this utility model is shown.

[0033] List of reference numerals in the attached diagram:

[0034] 1. Connecting screw; 101. First slot; 2. Nut; 201. Resistance strip; 202. Through hole; 203. First connecting groove; 2031. First rubber strip; 204. Slot; 3. Nut body; 301. Second connecting groove; 3011. Second rubber strip; 302. Second slot; 3021. Limiting block; 4. Anti-disengagement block; 401. Magnet; 402. Stop block. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] Example 1: Please refer to Figures 1 to 7 :

[0037] This utility model proposes a high-temperature resistant composite coating anti-loosening nut for nuclear power equipment, comprising: a connecting screw 1;

[0038] The outer end face of the connecting screw 1 is threaded, and the outer end face of the connecting screw 1 is provided with a first groove 101;

[0039] Nut 2 has a hexagonal structure. The outer end face of nut 2 has a slot 204, and the lower end face of nut 2 has a first connecting groove 203.

[0040] The nut body 3 has a threaded hole inside, and a second connecting groove 301 is provided on the upper end face of the nut body 3. A second rubber strip 3011 is attached inside the second connecting groove 301.

[0041] Anti-detachment block 4, the main body of anti-detachment block 4 is L-shaped, and the vertical plate part of anti-detachment block 4 is engaged in the first slot 101 on the surface of connecting screw 1.

[0042] The nut 2 has resistance strips 201 evenly installed on its outer end face. The outer end face of the resistance strip 201 has an arc-shaped structure. A through hole 202 is opened in the middle of each outer end face of the nut 2. A first rubber strip 2031 is pasted in the first connecting groove 203 on the lower end face of the nut 2. In use, in some special installation or disassembly operation scenarios, tools can be inserted into the through hole 202 to help workers tighten the nut 2.

[0043] The inner end face of the nut body 3 is provided with a second slot 302. The main body of the second slot 302 is L-shaped. A limiting block 3021 is fixedly installed on the inner end face of the second slot 302. The outer end face of the limiting block 3021 is set in an inclined structure. In use, the attraction force generated by the magnet 401 further enhances the tightness of the connection between the anti-loosening block 4 and the nut body 3.

[0044] When the second groove 302 on the inner end face of the nut body 3 is aligned with the first groove 101 on the outer end face of the connecting screw 1, the anti-disengagement block 4 is engaged in the first groove 101 and the second groove 302. The horizontal plate at the lower end of the anti-disengagement block 4 is engaged in the lower part of the second groove 302. In use, when the second groove 302 on the inner end face of the nut body 3 is aligned with the first groove 101 on the outer end face of the connecting screw 1, the vertical plate of the anti-disengagement block 4 can be precisely engaged in the first groove 101 on the surface of the connecting screw 1, and the horizontal plate at the lower end of the anti-disengagement block 4 is engaged in the lower part of the second groove 302. This double groove engagement method limits the nut body 3 in the axial and radial directions, effectively constraining the displacement of the nut body 3 relative to the connecting screw 1 in all directions.

[0045] Among them, two magnets 401 are provided on the upper end surface of the lower horizontal plate of the anti-detachment block 4. The magnets 401 are attached to the lower end surface of the second slot 302 on the surface of the nut body 3. A stop block 402 is installed on the surface of the anti-detachment block 4.

[0046] The working principle of this embodiment:

[0047] In this invention, the outer end face of the connecting screw 1 is threaded, and the nut body 3 has a matching threaded hole inside. During installation, by rotating the nut body 3, the engagement of the threads causes the nut body 3 to move along the connecting screw 1, thereby achieving the fastening of the connecting parts and connecting the relevant components together. The nut 2, as an auxiliary operating component, has a hexagonal structure that facilitates tightening with tools, allowing appropriate torque to be applied to the nut body 3 to ensure the expected tightness between the nut body 3 and the connecting screw 1. The anti-loosening block 4 has an L-shaped body. The structure features a double-groove design. When the second groove 302 on the inner end face of the nut body 3 aligns with the first groove 101 on the outer end face of the connecting screw 1, the vertical plate of the anti-loosening block 4 can precisely engage in the first groove 101 on the surface of the connecting screw 1. The horizontal plate at the lower end of the anti-loosening block 4 engages in the lower end of the second groove 302. This double-groove engagement method limits the nut body 3 axially and radially, effectively constraining the displacement of the nut body 3 relative to the connecting screw 1 in all directions, and preventing the nut body 3 from being displaced due to external forces such as vibration and impact during equipment operation. The stability of the connection is ensured by preventing loosening or rotation. Two magnets 401 are provided on the upper surface of the lower horizontal plate of the anti-loosening block 4. After the anti-loosening block 4 is inserted into the slot, the magnets 401 adhere to the lower surface of the second slot 302 on the surface of the nut body 3. The attraction force generated by the magnets 401 further enhances the tightness of the connection between the anti-loosening block 4 and the nut body 3, making it less likely for the anti-loosening block 4 to shift or fall out within the slot, thus strengthening the overall anti-loosening effect. A limiting block 3021 is fixedly installed in the second slot 302 on the inner end face of the nut body 3, and the limiting block 3021… The outer end face of the anti-loosening block 4 has an inclined structure. When installing the anti-loosening block 4, the inclined limiting block 3021 plays a guiding and auxiliary positioning role, making it easy for the anti-loosening block 4 to accurately engage in the appropriate position in the slot. At the same time, during subsequent use, it can also prevent the anti-loosening block 4 from coming out of the slot due to accidental force, thereby indirectly improving the reliability of anti-loosening. A stop block 402 is installed on the surface of the anti-loosening block 4. The stop block 402 cooperates with the limiting block 3021. The stop block 402 can further limit the range of motion of the anti-loosening block 4, preventing it from detaching when subjected to abnormal external force. Excessive displacement or rotation ensures that the anti-disengagement block 4 always remains in the correct engagement position. A first rubber strip 2031 is pasted in the first connecting groove 203 on the lower end face of the nut 2, and a second rubber strip 3011 is pasted inside the second connecting groove 301 on the upper end face of the nut body 3. After the nut body 3 is tightened with the connecting screw 1, these rubber strips will be squeezed and deformed. On the one hand, they can fill the tiny gaps between the components and play a sealing role, preventing external dust, moisture and other impurities from entering the connection part. For the special environment where nuclear power equipment is located, it can effectively protect the connection part from corrosion.On the other hand, the rubber strip generates significant friction between itself and the contact surface after being compressed. When an external force attempts to loosen the nut, this friction can hinder the rotation of the nut body 3, thus enhancing the overall anti-loosening performance. Resistance strips 201 are evenly installed on the outer end face of the nut 2, and the outer end face of the resistance strips 201 has an arc-shaped structure. During use, when it is necessary to tighten the nut 2, the arc-shaped resistance strips 201 facilitate better application of force by hand or tool. A through hole 202 is opened in the middle of each outer end face of the nut 2. In some special installation or disassembly scenarios, tools can be inserted into the through holes 202 to help workers tighten the nut 2.

Claims

1. A high-temperature resistant composite coating anti-loosening nut for nuclear power equipment, characterized in that, Includes: a connecting screw (1), the outer end face of which is threaded and a first slot (101) is provided on the outer end face of the connecting screw (1); a nut (2), the nut (2) is hexagonal in shape, the outer end face of which is slotted (204) and the lower end face of which is provided with a first connecting groove (203); a nut body (3), the nut body (3) is threaded inside, the upper end face of which is provided with a second connecting groove (301) and a second rubber strip (3011) is pasted inside the second connecting groove (301); and an anti-detachment block (4), the anti-detachment block (4) is L-shaped in shape, and the vertical plate part of the anti-detachment block (4) is engaged in the first slot (101) on the surface of the connecting screw (1).

2. The high-temperature resistant composite coating anti-loosening nut for nuclear power equipment according to claim 1, characterized in that, The outer end face of the nut (2) is uniformly equipped with a resistance strip (201), and the outer end face of the resistance strip (201) is an arc-shaped structure.

3. The high-temperature resistant composite coating anti-loosening nut for nuclear power equipment according to claim 1, characterized in that, A through hole (202) is provided at the middle position of each outer end face of the nut (2), and a first rubber strip (2031) is pasted in the first connecting groove (203) on the lower end face of the nut (2).

4. The high-temperature resistant composite coating anti-loosening nut for nuclear power equipment according to claim 1, characterized in that, The inner end face of the nut body (3) is provided with a second slot (302). The main body of the second slot (302) is an L-shaped structure. A limit block (3021) is fixedly installed on the inner end face of the second slot (302). The outer end face of the limit block (3021) is set in an inclined structure.

5. The high-temperature resistant composite coating anti-loosening nut for nuclear power equipment according to claim 1, characterized in that, When the second slot (302) on the inner end face of the nut body (3) is aligned with the first slot (101) on the outer end face of the connecting screw (1), the anti-disengagement block (4) is engaged in the first slot (101) and the second slot (302), and the horizontal plate at the lower end of the anti-disengagement block (4) is engaged in the lower part of the second slot (302).

6. The high-temperature resistant composite coating anti-loosening nut for nuclear power equipment according to claim 1, characterized in that, Two magnets (401) are provided on the upper end surface of the lower horizontal plate of the anti-detachment block (4). The magnets (401) are attached to the lower end surface of the second slot (302) on the surface of the nut body (3). A stop block (402) is installed on the surface of the anti-detachment block (4).

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