Double-nut type high-temperature exhaust pipeline sliding support and locking method

Abstract

The application provides a double-nut type high-temperature exhaust pipeline sliding support and locking method, and belongs to the technical field of sliding supports. The sliding support comprises a sliding support assembly, a sliding groove, a fixing assembly, a limiting assembly and an elastic assembly. The sliding groove is arranged on the sliding support assembly. The fixing assembly is detachably arranged on the sliding groove. The fixing assembly comprises a bolt, a steel gasket, a first nut and a second nut. The steel gasket, the first nut and the second nut are movably arranged on the bolt in sequence along the axial direction of the bolt. When the pipeline is slightly shaken due to the self weight and ship vibration, the sliding support remains in a stationary state. When the pipeline is axially elongated due to heat, the sliding support can easily realize the sliding function. The double-nut self-locking function can prevent the nut from loosening and falling off. The stress borne by each part is far less than the allowable stress, so that the long-term use of the sliding support assembly can be ensured.

Description

Technical Field

[0001] This invention relates to the field of sliding support technology, and in particular to a double-nut type high-temperature exhaust pipe sliding support and locking method. Background Technology

[0002] In shipbuilding, to ensure the operational stability of high-temperature and high-pressure SCR equipment pipelines and high-temperature exhaust pipelines, sliding supports are often used to reduce pipeline vibration and noise transmission, and slide along with the pipeline as it moves due to thermal expansion.

[0003] However, most ships currently use single-nut sliding brackets. To prevent the nuts from falling off, workshop workers need to tighten the nuts according to the standard bolt preload. When the bolts are tightened to this preload, the sliding friction resistance between the friction pads and the oblong plate of the sliding bracket is extremely high, making the sliding bracket unable to slide, causing functional failure, and resulting in rigid damage to the sliding bracket and exhaust pipe. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a double-nut type high-temperature exhaust pipe sliding bracket and locking method. Through the cooperation of anti-rust components and connecting components, it can reduce the rusting of nuts and locking bolts, maintain the stable use of manhole cover components and fixing components, prevent the locking bolts from stripping in emergency situations, and detect the sealing of manhole cover components after the fixing components are installed. Through the cooperation of manhole cover components and water intake components, it can also provide the water intake components for emergency daily water supply.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A double-nut type high-temperature exhaust pipe sliding support includes a sliding support assembly, a sliding groove, a fixing assembly, a limiting assembly, and a spring assembly.

[0007] The sliding bracket assembly has a sliding groove, and the fixing assembly is detachably mounted on the sliding groove;

[0008] The fixing component includes a bolt, a steel washer, a first nut, and a second nut, which are movably disposed on the bolt in sequence along the axial direction of the bolt.

[0009] The limiting component is disposed inside the bolt;

[0010] The limiting assembly includes a first gear, a second gear, a bearing, a sensing key, a rotating shaft, a first transmission rod, a second transmission rod, a limiting plate, and an anti-slip plate. The first gear is rotatably disposed inside the bolt. A second gear is provided on one side of the first gear. The bearing is disposed between the first gear and the second gear. A sensing key is rotatably disposed on the radial outer surface of the bolt through an opening groove. The sensing key has an inner part and an outer part. The inner part is located inside the bolt. The rotating shaft is disposed between the bolt and the inner part. A first transmission rod is provided on one side of the inner part. The surface of the first transmission rod has toothed grooves. The first transmission rod meshes with the first gear. A second transmission rod is provided on one side of the second gear. A limiting plate is provided on one side of the second transmission rod. One end of the limiting plate is exposed on the radial outer surface of the bolt, and the limiting plate is located at a set position of the bolt. An anti-slip plate is provided on the top of the limiting plate.

[0011] The elastic component is disposed on one side of the second transmission rod.

[0012] Preferably, the sliding bracket assembly includes an upper sliding bracket, a lower sliding bracket, and a friction pad. The upper sliding bracket is detachably disposed above the lower sliding bracket, and the friction pad is disposed between the upper sliding bracket and the lower sliding bracket to prevent rigidity damage and noise caused by direct friction between the steel components.

[0013] Preferably, the upper sliding bracket includes an upper base plate, a fixing frame, and a support member. The upper base plate is provided with a fixing frame at its top, and the fixing frame is provided with a support member at its top. The projection of the support member along its axial direction is semi-circular.

[0014] Preferably, the lower sliding bracket includes a lower top plate, a support frame, and reinforcing members. The lower top plate is disposed below the upper bottom plate, the bottom of the lower top plate is provided with a support frame, and the support frame is provided with reinforcing members on both sides.

[0015] Preferably, the upper base plate, the lower top plate, and the friction pad are all provided with sliding grooves that extend through their surfaces, and the sliding grooves are interconnected.

[0016] Preferably, the bolt has external threads, the first nut and the second nut are both threadedly engaged with the bolt, and the bolt has a countersunk head.

[0017] Preferably, the elastic component includes a fixing plate and a tension spring. The fixing plate is disposed at the center inside the bolt, and a tension spring is provided on one side of the fixing plate. One end of the tension spring is connected to the second transmission rod.

[0018] Preferably, the outer side is inclined and has an external thread. Along the axial direction of the bolt, the diameter of the sensing key gradually increases on the side closer to the countersunk screw.

[0019] This invention also proposes a locking method for a double-nut type sliding support for high-temperature exhaust pipes, comprising the following steps:

[0020] S1. Install the sliding bracket: Place the friction pad on the upper sliding bracket, place the lower sliding bracket on the friction pad, and align the sliding grooves;

[0021] S2. Install the fixing assembly: Insert one end of the bolt from the bottom of the lower top plate, pass through the friction pad, and then extend one end of the bolt to the top of the upper bottom plate. Fit the steel washer onto the bolt. First, install the first nut and tighten the preload of the first nut to 1 / 5 of its standard preload. Then, tighten the second nut in the opposite direction to the standard preload based on the first nut to achieve the double nut self-locking function.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] In the above scheme, by tightening the preload of the first nut to 1 / 5 of its standard preload, the sliding support remains stationary even when the pipeline experiences slight vibrations due to its own weight and ship vibrations. When the pipeline elongates axially due to heat, the sliding support can easily achieve its sliding function. Then, by tightening the second nut in the opposite direction to the first nut to its standard preload, a double-nut self-locking function is achieved, preventing the nuts from loosening and falling off. Furthermore, the stress on each component is far less than its allowable stress, ensuring the long-term use of the sliding support assembly.

[0024] By using steel shims, direct steel-to-steel friction between the upper base plate and the lower top plate can be prevented, reducing rigidity damage and noise caused by direct friction.

[0025] By combining the limiting components, as the first nut slides down along the bolt, the outer side of the sensing key is gradually pressed inward, causing the inner side to squeeze the first transmission rod inward. The first transmission rod drives the first gear to rotate, the first gear drives the second gear, and the second gear drives the second transmission rod to move, so that the limiting piece extends out of the bolt. The limiting piece is located at a set position, namely 1 / 5 of the bolt's standard preload, allowing the operator to directly rotate the first nut, making it easy for the first nut to be directly fixed at 1 / 5 of the bolt's standard preload, thus facilitating operator operation. Attached Figure Description

[0026] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0027] Figure 1 This is a schematic diagram of the overall structure of a double-nut type high-temperature exhaust pipe sliding support according to the present invention;

[0028] Figure 2 This is a schematic diagram showing the disassembled structure of the sliding support assembly of a double-nut type high-temperature exhaust pipe sliding support according to the present invention.

[0029] Figure 3 This is a schematic diagram of the fixing assembly of a double-nut type high-temperature exhaust pipe sliding bracket according to the present invention;

[0030] Figure 4 This is a schematic diagram showing the disassembled structure of the fixing component of a double-nut type high-temperature exhaust pipe sliding bracket according to the present invention;

[0031] Figure 5 This is a schematic cross-sectional view of the first gear of a double-nut type high-temperature exhaust pipe sliding support according to the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the first gear of a double-nut type high-temperature exhaust pipe sliding support according to the present invention.

[0033] [Figure Labels]

[0034] 1. Sliding bracket assembly; 101. Upper sliding bracket; 1011. Upper base plate; 1012. Fixing frame; 1013. Support component; 102. Lower sliding bracket; 1021. Lower top plate; 1022. Support frame; 1023. Reinforcing component; 103. Friction pad; 2. Sliding groove; 3. Fixing assembly; 301. Bolt; 3011. Countersunk screw; 302. Steel washer; 303. First nut; 304. Second nut; 4. Limiting assembly; 401. First gear; 402. Second gear; 403. Bearing; 404. Sensing key; 4041. Inner side; 4042. Outer side; 405. Rotating shaft; 406. First transmission rod; 407. Second transmission rod; 408. Limiting piece; 409. Anti-slip piece; 5. Elastic assembly; 501. Fixing plate; 502. Tension spring.

[0035] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0036] The following is a detailed description of a double-nut type high-temperature exhaust pipe sliding bracket and locking method provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0037] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0038] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0039] It is understood that the meanings of “on”, “above” and “above” in this disclosure should be interpreted in the broadest sense, such that “on” means not only “directly on” something, but also includes something with an intermediary feature or layer, and that “above” or “above” means not only “on” something, but also includes something “above” or “above” without an intermediary feature or layer.

[0040] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0041] like Figures 1 to 6 As shown, an embodiment of the present invention provides a double-nut type high-temperature exhaust pipe sliding bracket, including a sliding bracket assembly 1, a sliding groove 2, a fixing assembly 3, a limiting assembly 4, and a spring assembly 5.

[0042] The sliding bracket assembly 1 has a sliding groove 2, and the fixing assembly 3 is detachably mounted on the sliding groove 2;

[0043] The fixing component 3 includes a bolt 301, a steel washer 302, a first nut 303, and a second nut 304. The steel washer 302, the first nut 303, and the second nut 304 are sequentially and movably mounted on the bolt 301 along the axial direction of the bolt 301.

[0044] The limiting component 4 is located inside the bolt 301;

[0045] The limiting assembly 4 includes a first gear 401, a second gear 402, a bearing 403, a sensing key 404, a rotating shaft 405, a first transmission rod 406, a second transmission rod 407, a limiting plate 408, and an anti-slip plate 409. The first gear 401 is rotatably disposed inside the bolt 301. The second gear 402 is provided on one side of the first gear 401. The bearing 403 is disposed between the first gear 401 and the second gear 402. The sensing key 404 is rotatably provided on the radial outer surface of the bolt 301 through an opening groove. The sensing key 404 has an inner part 4041 and an outer part 4042. The inner part 4041 is located on the bolt. Inside bolt 301, shaft 405 is located between bolt 301 and inner side 4041. A first transmission rod 406 is provided on one side of inner side 4041. The surface of the first transmission rod 406 has toothed grooves. The first transmission rod 406 meshes with a first gear 401. A second transmission rod 407 is provided on one side of second gear 402. A limiting piece 408 is provided on one side of second transmission rod 407. One end of the limiting piece 408 is exposed on the radial outer surface of bolt 301, and the limiting piece 408 is located at the set position of bolt 301, that is, at 5 / 1 of the standard preload of bolt 301. An anti-slip piece 409 is provided on the top of the limiting piece 408.

[0046] Therefore, by setting the steel shim 302, direct steel-to-steel friction between the upper bottom plate 1011 and the lower top plate 1021 can be prevented, reducing rigidity damage and noise caused by direct friction.

[0047] The elastic component 5 is located on one side of the second transmission rod 407.

[0048] Please refer to Figure 1 and Figure 2As shown in this embodiment, the sliding bracket assembly 1 includes an upper sliding bracket 101, a lower sliding bracket 102, and a friction pad 103. The upper sliding bracket 101 is detachably disposed above the lower sliding bracket 102, and the friction pad 103 is disposed between the upper sliding bracket 101 and the lower sliding bracket 102 to prevent rigidity damage and noise caused by direct friction between the steel.

[0049] Specifically, the upper sliding bracket 101 includes an upper base plate 1011, a fixing frame 1012 and a support member 1013. The upper base plate 1011 is provided with a fixing frame 1012 at its top, and the fixing frame 1012 is provided with a support member 1013 at its top. The projection of the support member 1013 along its axial direction is semi-circular.

[0050] Specifically, the lower sliding bracket 102 includes a lower top plate 1021, a support frame 1022, and a reinforcing member 1023. The lower top plate 1021 is located below the upper bottom plate 1011. The bottom of the lower top plate 1021 is provided with the support frame 1022, and the two sides of the support frame 1022 are provided with reinforcing members 1023.

[0051] Specifically, sliding grooves 2 are provided through the surfaces of the upper base plate 1011, the lower top plate 1021, and the friction pad 103, and the sliding grooves 2 are interconnected.

[0052] Please refer to Figure 3 and Figure 4 As shown in this embodiment, the bolt 301 has external threads, the first nut 303 and the second nut 304 are both threadedly engaged with the bolt 301, and the bolt 301 has a countersunk screw 3011.

[0053] Therefore, by tightening the preload of the first nut 303 to 1 / 5 of its standard preload, the sliding support remains stationary when the pipeline experiences slight vibrations due to its own weight and ship vibrations under this preload. When the pipeline is heated and elongates axially, the sliding support can easily achieve its sliding function. Then, the second nut 304 is tightened in the opposite direction to the first nut 303 to the standard preload, achieving a double-nut self-locking function to prevent the nuts from loosening and falling off. Furthermore, the stress on each component is far less than its allowable stress, ensuring the long-term use of the sliding support assembly 101.

[0054] Please refer to Figure 5 and Figure 6 As shown in this embodiment, the elastic component 5 includes a fixing plate 501 and a tension spring 502. The fixing plate 501 is located at the center inside the bolt 301. A tension spring 502 is provided on one side of the fixing plate 501. One end of the tension spring 502 is connected to the second transmission rod 407.

[0055] Specifically, the outer part 4042 is inclined and has external threads. Along the axial direction of the bolt 301, the diameter of the sensing key 404 gradually increases on the side near the countersunk screw 3011.

[0056] Therefore, through the combination of the limiting components 4, when the first nut 303 slides down along the bolt 301, the outer part 4042 of the sensing key 404 is gradually pressed inward, causing the inner part 4041 to press the first transmission rod 406 inward. The first transmission rod drives the first gear 401 to rotate, the first gear 401 drives the second gear 402, and the second gear 402 drives the second transmission rod 407 to move, so that the limiting piece 408 extends out of the bolt 301. The limiting piece 408 is located at the set position, that is, 1 / 5 of the standard preload of the bolt 301, so that the personnel can directly rotate the first nut 303, which is convenient for the first nut 303 to directly fix the bolt 301 at 1 / 5 of the standard preload, making it convenient for personnel to operate.

[0057] This invention also proposes a locking method for a double-nut type sliding support for high-temperature exhaust pipes, comprising the following steps:

[0058] S1. Install the sliding bracket: Place the anti-friction pad 103 on the upper sliding bracket 101, place the lower sliding bracket 102 on the friction pad 103, and align the sliding grooves 2.

[0059] S2. Install the fixing component 3: Insert one end of the bolt 301 from the bottom of the lower top plate 1021, pass through the friction washer 103, and then extend one end of the bolt 301 to the top of the upper bottom plate 1011. Put the steel washer 302 into the bolt 301. First, install the first nut 303 and tighten the preload of the first nut 303 to 1 / 5 of its standard preload. Then, tighten the second nut 304 in the opposite direction to the standard preload based on the first nut 303 to achieve the double nut self-locking function.

[0060] It is worth noting that in step S2, due to the combination of the limiting components 4, the limit can be quickly set, and when the personnel install the first nut 303, they can directly tighten it to the maximum force, which is convenient for personnel to use.

[0061] In an alternative embodiment, the sliding process of the sliding bracket is nonlinearly simulated using ANSYS WORKBENCH. During the calculation, the preload of bolt 301 is applied only by the first nut 303, while the second nut 304 only serves as an anti-loosening element and has minimal impact on the calculation results. Therefore, the model of the second nut 304 is ignored. Furthermore, because the model is symmetrical, half of the model is used for analysis to improve computational efficiency. After repeated calculations and verifications, when the tightening force of bolt 301 and the first nut 303 is 1 / 5 of their standard preload, the stress and other parameters of each component are at their optimal state. The calculation results show that the stress on each component is far less than its allowable stress, ensuring the long-term use of the sliding bracket. When using bolt 301 and the first nut 303 to lock the friction pad 103 and the steel pad 302 in the double-nut type sliding bracket, different standard preloads can be selected according to different bolt 301 specifications. Therefore, the preload of the first nut 303 is tightened to 1 / 5 of its standard preload. Under this preload, the sliding support remains stationary when the pipeline experiences slight vibrations due to its own weight and ship vibrations. However, when the pipeline is heated and elongates axially, the sliding support can easily achieve its sliding function. Then, the second nut 304 is tightened in the opposite direction to the standard preload of the first nut 303, achieving a double-nut self-locking function and preventing the nuts from loosening and falling off.

[0062] In summary, the technical solution provided by this invention, by tightening the preload of the first nut 303 to 1 / 5 of its standard preload, allows the sliding bracket to remain stationary even when the pipeline experiences slight vibrations due to its own weight and ship vibrations under this preload. When the pipeline is heated and elongates axially, the sliding bracket can easily achieve its sliding function. Then, by tightening the second nut 304 in the opposite direction to the first nut 303 to the standard preload, a double-nut self-locking function is achieved, preventing the nuts from loosening and falling off. Furthermore, the stress on each component is far less than its allowable stress, ensuring the long-term use of the sliding bracket assembly 101.

[0063] By setting the steel shim 302, direct friction between the upper bottom plate 1011 and the lower top plate 1021 can be prevented, reducing rigidity damage and noise caused by direct friction.

[0064] By combining the limiting components 4, when the first nut 303 slides down along the bolt 301, the outer side 4042 of the sensing key 404 is gradually pressed inward, causing the inner side 4041 to press the first transmission rod 406 inward. The first transmission rod drives the first gear 401 to rotate, the first gear 401 drives the second gear 402, and the second gear 402 drives the second transmission rod 407 to move, so that the limiting piece 408 extends out of the bolt 301. The limiting piece 408 is located at the set position, that is, 1 / 5 of the standard preload of the bolt 301, so that the personnel can directly rotate the first nut 303, which is convenient for the first nut 303 to directly fix the bolt 301 at 1 / 5 of the standard preload, making it convenient for personnel to operate.

[0065] The design of this double-nut sliding bracket and locking method makes the locking structure of bolt 301 and first nut 303 more robust, greatly reducing the sliding friction resistance between friction pad 103 and the lower top plate 1021 and upper bottom plate 1011 when the sliding bracket slides. This reduces the frictional stress between the parts and solves the problem of rigid damage to the sliding bracket and pipeline caused by the failure of the sliding bracket. It greatly extends the service life of parts such as bolt 301, first nut 303, steel pad 302, sliding bracket, and exhaust pipe.

[0066] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0067] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc.

[0068] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A double-nut type high-temperature exhaust pipe sliding support, comprising a sliding support assembly (1), a sliding groove (2), a fixing assembly (3), a limiting assembly (4), and an elastic assembly (5), characterized in that, The sliding bracket assembly (1) has a sliding groove (2), and the fixing assembly (3) is detachably mounted on the sliding groove (2); The fixing component (3) includes a bolt (301), a steel washer (302), a first nut (303), and a second nut (304). The steel washer (302), the first nut (303), and the second nut (304) are sequentially and movably mounted on the bolt (301) along the axial direction of the bolt (301). The limiting component (4) is disposed inside the bolt (301); The limiting assembly (4) includes a first gear (401), a second gear (402), a bearing (403), a sensing key (404), a rotating shaft (405), a first transmission rod (406), a second transmission rod (407), a limiting piece (408), and an anti-slip piece (409). The first gear (401) is rotatably disposed inside the bolt (301). A second gear (402) is provided on one side of the first gear (401). The bearing (403) is disposed between the first gear (401) and the second gear (402). A sensing key (404) is rotatably disposed on the radial outer surface of the bolt (301) through an opening groove. The sensing key (404) has an inner part (4041) and an outer part (4042). 4041) is located inside the bolt (301). The rotating shaft (405) is disposed between the bolt (301) and the inner side (4041). A first transmission rod (406) is provided on one side of the inner side (4041). The surface of the first transmission rod (406) has a toothed groove. The first transmission rod (406) meshes with the first gear (401). A second transmission rod (407) is provided on one side of the second gear (402). A limiting piece (408) is provided on one side of the second transmission rod (407). One end of the limiting piece (408) is exposed on the radial outer surface of the bolt (301). The limiting piece (408) is located at the set position of the bolt (301). An anti-slip piece (409) is provided on the top of the limiting piece (408). The elastic component (5) is disposed on one side of the second transmission rod (407); the sliding bracket assembly (1) includes an upper sliding bracket (101), a lower sliding bracket (102), and a friction pad (103). The upper sliding bracket (101) is detachably disposed above the lower sliding bracket (102). The friction pad (103) is disposed between the upper sliding bracket (101) and the lower sliding bracket (102) to prevent rigid damage and noise caused by direct friction between steel. The upper sliding bracket (101) includes an upper base plate (1011), a fixing frame (1012), and a support member (1013). The top of the upper base plate (1011) is provided with a fixing frame (1012). The top of the upper base plate (1011) is provided with a support member (1013), and the projection of the support member (1013) along the axial direction of the support member (1013) is semi-circular; the lower sliding bracket (102) includes a lower top plate (1021), a support frame (1022) and a reinforcing member (1023). The lower top plate (1021) is located below the upper base plate (1011), and the bottom of the lower top plate (1021) is provided with a support frame (1022). The support frame (1022) is provided with reinforcing members (1023) on both sides; the surfaces of the upper base plate (1011), the lower top plate (1021) and the friction pad (103) are all provided with sliding grooves (2), and each sliding groove (2) is interconnected.

2. The double-nut type high-temperature exhaust pipe sliding support according to claim 1, characterized in that, The bolt (301) has external threads, and the first nut (303) and the second nut (304) are both threadedly engaged with the bolt (301). The bolt (301) has a countersunk screw (3011).

3. The double-nut type high-temperature exhaust pipe sliding support according to claim 2, characterized in that, The elastic component (5) includes a fixing plate (501) and a tension spring (502). The fixing plate (501) is located at the center inside the bolt (301). A tension spring (502) is provided on one side of the fixing plate (501). One end of the tension spring (502) is connected to the second transmission rod (407).

4. A double-nut type high-temperature exhaust pipe sliding support according to claim 3, characterized in that, The outer portion (4042) is inclined and has an external thread. Along the axial direction of the bolt (301), the diameter of the sensing key (404) gradually increases on the side near the countersunk screw (3011).

5. A locking method for a double-nut type high-temperature exhaust pipe sliding bracket, comprising the double-nut type high-temperature exhaust pipe sliding bracket as described in any one of claims 1 to 4, characterized in that, Includes the following steps: S1. Install the sliding bracket: Place the friction pad (103) on the upper sliding bracket (101), place the lower sliding bracket (102) on the friction pad (103), and align each of the sliding grooves (2); S2. Install the fixing component (3): Insert one end of the bolt (301) from the bottom of the lower top plate (1021), pass through the friction pad (103), and then extend one end of the bolt (301) to the top of the upper bottom plate (1011). Put the steel pad (302) into the bolt (301), first install the first nut (303), and then tighten the second nut (304) in the opposite direction to the standard preload on the basis of the first nut (303) to achieve the double nut self-locking function.

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