High-temperature-resistant fastener

Abstract

The utility model relates to the technical field of fasteners, in particular to a high-temperature-resistant fastener which comprises a bolt, a nut is arranged on the outer side of the bolt, the bolt is in threaded connection with the nut, and a trigger column is arranged in the bolt. The reinforcing assembly is arranged in the bolt, and the reinforcing assembly is used for enhancing the fastening capacity of the fastener; and the heat dissipation assembly is arranged on the trigger column, and the heat dissipation assembly is used for improving the high temperature resistance of the fastener. Compared with the prior art, a multi-point interlocking structure is achieved through the mechanical locking assembly, the connection stability is enhanced, and the stress resistance is improved; meanwhile, a three-dimensional heat dissipation path is adopted, heat is efficiently guided out through the heat dissipation copper pipes and the heat dissipation holes, and local overheating is avoided.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a high-temperature resistant fastener. Background Technology

[0002] In modern industry, aerospace, energy and power fields, large bolts serve as key connecting components, enduring harsh conditions such as high temperature and high pressure. Under high temperature environments, the stability and fastening effect of bolts are crucial to the reliability of equipment. However, under these high temperature conditions, the performance of large bolts is often limited by material selection and structural design, resulting in unstable connection performance, which in turn affects the safety and operating efficiency of the overall system.

[0003] Currently, improvements to the high-temperature performance of large bolts mainly focus on two aspects: material optimization and traditional structural design. Firstly, from a material optimization perspective, engineers are exploring the use of high-performance materials such as heat-resistant alloys and ceramic coatings to enhance the high-temperature strength and oxidation resistance of bolts. Heat-resistant alloys can maintain good mechanical properties at high temperatures, but their high cost and processing difficulty remain significant factors limiting their widespread application. Meanwhile, while ceramic coatings offer excellent thermal insulation, they place higher demands on substrate adhesion and processing techniques, and may peel off at high temperatures, reducing their stability in practical applications.

[0004] Secondly, traditional anti-loosening designs for large bolts, such as the use of locking washers and double nuts, have been widely used. These methods prevent nuts from loosening by increasing friction. However, in continuous high-temperature environments, these traditional anti-loosening structures often have significant shortcomings. For example, elastic washer materials are prone to aging and loss of elasticity at high temperatures, making it unable to maintain the required friction. Thread adhesive may decompose and fail at high temperatures, resulting in the loss of its anti-loosening function.

[0005] Furthermore, existing large bolts generally suffer from insufficient heat dissipation capacity under high-temperature conditions. During high-temperature operation, heat easily accumulates in the contact area of ​​bolt components, leading to excessively high local temperatures. This can cause problems such as thread softening and creep deformation, affecting the connection performance and long-term service life of the bolt. Although some solutions attempt to improve heat dissipation by adding heat dissipation fins or cooling channels, these designs often increase the size and weight of the bolt. Moreover, it is difficult to achieve effective synergy between the complex heat dissipation structure and the anti-loosening function, resulting in the inability to guarantee the anti-loosening effect while meeting heat dissipation requirements, thus limiting their application under high-temperature operating conditions. Utility Model Content

[0006] In view of this, the purpose of this utility model is to propose a high-temperature resistant fastener to solve the problem that traditional fasteners are prone to loosening under high temperature and high load conditions.

[0007] To achieve the above objectives, this utility model provides a high-temperature resistant fastener, comprising: a bolt, wherein a nut is provided on the outer side of the bolt, the bolt and the nut are threadedly connected, and a trigger post is provided inside the bolt;

[0008] A reinforcing component is disposed inside the bolt, the reinforcing component being used to enhance the fastening capability of the fastener;

[0009] A heat dissipation component is disposed on the trigger post, and the heat dissipation component is used to improve the high temperature resistance of the fastener.

[0010] Preferably, the reinforcing component includes a plurality of locking pins slidably installed inside the bolt, each locking pin having a push block fixedly installed on one side, each trigger pin having a plurality of engaging grooves adapted to the push block, each locking pin having the other end penetrating the bolt, and each nut having a plurality of first locking grooves inside, the locking pin being adapted to the first locking grooves.

[0011] Preferably, the bolt has a cavity inside, and a plurality of second locking grooves are formed in the cavity. The second locking grooves penetrate the bolt, and the locking pin is slidably installed in the second locking grooves.

[0012] Preferably, a return spring is fixedly installed on one side of the push block, and the other side of the return spring is fixedly installed on the inner wall of the bolt.

[0013] Preferably, a protective cover is provided on one side of the bolt, the protective cover is snapped into one side of the bolt, and the side of the protective cover near the bolt abuts against one side of the trigger post.

[0014] Preferably, the bolt has several slots inside, and one end of the push block is slidably installed in the slots.

[0015] Preferably, the heat dissipation assembly includes connecting plates installed at both ends of the trigger post, the connecting plates having a plurality of heat dissipation holes, and a plurality of heat dissipation copper pipes installed between two connecting plates, the heat dissipation holes and the heat dissipation copper pipes being coaxially arranged.

[0016] The beneficial effects of this utility model are:

[0017] 1. This high-temperature resistant fastener, by incorporating a reinforcing component, includes several locking pins slidably installed inside the bolt, a push block mounted on one side of the locking pins, a return spring connecting the push block to the inner wall of the bolt, and a first locking groove and a second locking groove respectively adapted to the internal structures of the nut and the bolt. After the fastener is installed, this reinforcing component can be triggered by inserting a trigger pin. When the trigger pin is pushed along the cavity, its surface groove matches the push block, causing the push block to slide along the slot under the influence of the groove, thereby driving the locking pin to slide outward along the second locking groove until its end is embedded in the first locking groove of the nut. The groove enables mechanical locking between the locking pin and the nut. At this time, multiple locking pins participate in the connection simultaneously, forming a multi-point mechanical locking structure. This not only strengthens the structure on the basis of the original threaded connection, but also significantly enhances the overall fastening force of the connection. Compared with traditional fastening methods, this structure can more effectively withstand axial and radial stress under complex working conditions, improve the overall stability and seismic performance of the connection, and effectively avoid problems such as thread loosening, stripping or connection failure caused by long-term stress or equipment vibration. Thus, it greatly improves the safety and reliability of fasteners under high load and strong vibration conditions.

[0018] 2. This high-temperature resistant fastener, by incorporating a heat dissipation assembly, includes connecting discs mounted at both ends of the trigger post, several heat dissipation holes distributed on the connecting discs, and multiple heat dissipation copper pipes running through and coaxially arranged with the connecting discs. This structure effectively achieves rapid heat dissipation in high-temperature operating environments. When the fastener is under continuous high temperature or periodic temperature rise conditions, the heat absorbed inside the trigger post can be quickly conducted to the outside through the connecting discs at both ends. At the same time, the heat dissipation holes on the connecting discs further accelerate the heat exchange rate by increasing the contact area with the air. The heat dissipation copper pipes connecting the two connecting discs, due to their excellent thermal conductivity, can evenly distribute and quickly release heat within the axial range, thereby preventing heat accumulation in local areas and abnormal temperature rise. Through this three-dimensional, multi-channel heat dissipation path, the entire fastening system can maintain a low thermal load state in high-temperature environments, avoiding problems such as material softening, thread failure, or loosening of connections due to thermal expansion caused by local overheating. This effectively ensures the structural integrity and connection stability of the fastener, significantly improving its high-temperature resistance and reliability and service life under long-term continuous high-temperature operating conditions. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal cross-sectional structure of this utility model;

[0022] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0023] Figure 4 This is a schematic diagram of the internal structure of the bolt of this utility model;

[0024] Figure 5 This utility model Figure 4 Enlarged structural diagram at point B;

[0025] Figure 6 This utility model Figure 4 Enlarged structural diagram at point C;

[0026] Figure 7 This is a three-dimensional structural diagram of the trigger post, heat dissipation copper pipe, etc. of this utility model.

[0027] The diagram is marked as follows:

[0028] 1. Bolt; 2. Nut; 3. Trigger pin; 4. First locking groove; 5. Second locking groove; 6. Locking pin; 7. Return spring; 8. Push block; 9. Cavity; 10. Slot; 11. Heat dissipation hole; 12. Heat dissipation copper pipe; 14. Protective cover; 15. Connecting plate; 16. Fitting groove. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0030] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] like Figures 1 to 7 As shown, the high-temperature resistant fastener includes: a bolt 1, a nut 2 on the outside of the bolt 1, the bolt 1 and the nut 2 being threaded together, and a trigger post 3 inside the bolt 1; a reinforcing component, which is disposed inside the bolt 1 and is used to enhance the fastening capacity of the fastener; and a heat dissipation component, which is disposed on the trigger post 3 and is used to improve the high-temperature resistance of the fastener.

[0032] After the fastener is installed into the target equipment or structure according to the usage requirements, the nut 2 and bolt 1 are tightened to form a basic initial fastening connection. Subsequently, the trigger post 3 is pushed into the bolt 1. After being pushed in, the trigger post 3 contacts the internal reinforcement component, thereby activating the working mechanism of the reinforcement component. The reinforcement component begins to function, applying a strengthening force or producing a secondary locking effect on the connection between the bolt 1 and the nut 2, making the fastening connection more stable and preventing loosening due to vibration or thermal expansion and contraction. At the same time, in high-temperature environments, the heat dissipation component works synchronously with the temperature rise. Through the heat-conducting material and heat dissipation structure, the heat generated by friction or the environment is promptly dissipated or dispersed, thereby effectively reducing the temperature of the bolt 1 and its connection area. This avoids problems such as material performance degradation, thread seizing, or thermal expansion failure due to overheating, and improves the overall high-temperature stability and reliability of the fastener.

[0033] like Figures 2 to 7 As shown, the reinforcement assembly includes several locking pins 6 slidably installed inside the bolt 1. A push block 8 is fixedly installed on one side of each locking pin 6. Several engaging grooves 16 are formed on the trigger pin 3, which are adapted to the push block 8. The other end of each locking pin 6 passes through the bolt 1. Several first locking grooves 4 are formed inside the nut 2, and the locking pin 6 is adapted to the first locking grooves 4. A cavity 9 is formed inside the bolt 1, and several second locking grooves 5 are formed inside the cavity 9. The second locking grooves 5 pass through the bolt 1, and the locking pin 6 is slidably installed in the second locking grooves 5. A return spring is fixedly installed on one side of the push block 8. 7. The other side of the return spring 7 is fixedly installed on the inner wall of the bolt 1; a protective cover 14 is provided on one side of the bolt 1, the protective cover 14 is snapped into one side of the bolt 1, and the side of the protective cover 14 near the bolt 1 abuts against one side of the trigger post 3; several slots 10 are opened inside the bolt 1, and one end of the push block 8 is slidably installed in the slot 10; the heat dissipation assembly includes connecting plates 15 installed at both ends of the trigger post 3, several heat dissipation holes 11 are opened on the connecting plates 15, and several heat dissipation copper pipes 12 are installed between the two connecting plates 15, and the heat dissipation holes 11 and heat dissipation copper pipes 12 are coaxially arranged;

[0034] After the fastener is installed into the target equipment or structure according to the usage requirements, tighten the nut 2 to form a preliminary connection with the bolt 1. At this time, the reinforcement function is not yet activated. Then, open the protective cover 14 on one side of the bolt 1 and slowly push the trigger pin 3 along the cavity 9 inside the bolt 1. During the pushing process, the several matching grooves 16 set on the surface of the trigger pin 3 contact and align with the push block 8 in sequence. Under the action of the matching grooves 16, the push block 8 slides outward and overcomes the elastic force of the return spring 7 to push out the locking pin 6 that is slidably installed in the second locking groove 5. After being pushed out, the other end of the locking pin 6 passes through the bolt 1 and precisely matches the first locking groove 4 set in the nut 2 to achieve locking. At this time, the reinforcement component is activated. The process completes the work, forming a multi-point mechanical locking structure between bolt 1 and nut 2, which greatly improves the reliability and vibration resistance of the connection. At the same time, several heat dissipation holes 11 on the connecting discs 15 at both ends of the trigger post 3, together with multiple heat dissipation copper pipes 12 arranged coaxially, work together to form a heat dissipation channel. In high-temperature environments, the heat generated inside and around bolt 1 can be quickly discharged through the heat dissipation copper pipes 12, and the heat dissipation can be achieved by air convection through the connecting discs 15 and the heat dissipation holes 11. This effectively suppresses the heat accumulation of fasteners under high-temperature conditions, avoids the loosening caused by the decrease in material strength or thermal expansion and contraction due to high temperature, and ultimately achieves a reliable fastening effect with structural stability and reasonable temperature control.

[0035] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0036] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-temperature resistant fastener, characterized in that, include: Bolt (1), a nut (2) is provided on the outside of the bolt (1), the bolt (1) and the nut (2) are threaded together, and a trigger post (3) is provided inside the bolt (1); A reinforcing component is disposed inside the bolt (1) and is used to enhance the fastening capability of the fastener; A heat dissipation component is disposed on the trigger post (3) and is used to improve the high temperature resistance of the fastener.

2. The high-temperature resistant fastener according to claim 1, characterized in that, The reinforcement component includes several locking pins (6) that are slidably installed inside the bolt (1). A push block (8) is fixedly installed on one side of each locking pin (6). Several matching grooves (16) are provided on the trigger pin (3). The matching grooves (16) are adapted to the push block (8). The other end of each locking pin (6) is provided through the bolt (1). Several first locking grooves (4) are provided inside the nut (2). The locking pin (6) is adapted to the first locking grooves (4).

3. The high-temperature resistant fastener according to claim 2, characterized in that, The bolt (1) has a cavity (9) inside, and a plurality of second locking grooves (5) are provided in the cavity (9). The second locking grooves (5) penetrate the bolt (1), and the locking pin (6) is slidably installed in the second locking grooves (5).

4. The high-temperature resistant fastener according to claim 3, characterized in that, A reset spring (7) is fixedly installed on one side of the push block (8), and the other side of the reset spring (7) is fixedly installed on the inner wall of the bolt (1).

5. The high-temperature resistant fastener according to claim 4, characterized in that, A protective cover (14) is provided on one side of the bolt (1). The protective cover (14) is snapped into one side of the bolt (1). The side of the protective cover (14) near the bolt (1) abuts against one side of the trigger post (3).

6. The high-temperature resistant fastener according to claim 5, characterized in that, The bolt (1) has several slots (10) inside, and one end of the push block (8) is slidably installed in the slot (10).

7. The high-temperature resistant fastener according to claim 1, characterized in that, The heat dissipation assembly includes a connecting plate (15) installed at both ends of the trigger post (3). The connecting plate (15) has several heat dissipation holes (11). Several heat dissipation copper pipes (12) are installed between the two connecting plates (15). The heat dissipation holes (11) and the heat dissipation copper pipes (12) are coaxially arranged.

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