XPS extruded board with flame-retardant structure

By designing a fixing and connecting mechanism on XPS extruded polystyrene board, a tight connection between the board and the wall is achieved using bevel gear transmission and a snap-fit ​​structure. Sliding blocks and snap rings simplify installation, and the elastic structure of the slide cylinder and rotating plate enables quick connection between the boards. This solves the problems of time-consuming and laborious screw fixing and difficult adhesive removal, thus improving installation and disassembly efficiency.

CN224431686UActive Publication Date: 2026-06-30WUHAN DINGHUAYUAN THERMAL INSULATION & ENERGY SAVING TECH

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
WUHAN DINGHUAYUAN THERMAL INSULATION & ENERGY SAVING TECH
Filing Date
2025-07-03
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing XPS extruded polystyrene boards require screws and drilling to fix them to the wall, which makes installation and disassembly time-consuming and laborious, and difficult to disassemble after the adhesive is applied.

Method used

The system employs a fixing mechanism and a connecting mechanism, utilizing bevel gear transmission and a snap-fit ​​structure to achieve a tight connection between the panel and the wall. The design of sliding blocks and snap rings simplifies the installation and disassembly process. The elastic structure of the sliding cylinder and rotating plate enables rapid connection and separation between the panels.

Benefits of technology

It improves the efficiency of panel installation and disassembly, simplifies screw fixing and adhesive use, and enhances the convenience of installation and disassembly.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model relates to the field of extruded polystyrene (XPS) board technology and discloses an XPS board with a flame-retardant structure. The board includes a board body, with fixing mechanisms installed at both the upper and lower ends for fixing the board body to a wall. Multiple connecting mechanisms are installed on adjacent sides of the outer wall of the board body for connecting multiple boards together. Each fixing mechanism includes a fixing plate installed at the upper and lower ends of the board body. A torsion bracket is rotatably connected to the front side of the outer wall of the fixing plate, and a bevel gear is fixedly connected to the middle of the outer wall of the torsion bracket. In this utility model, when the threaded rod rotates, the sliding block connected to the outer thread slides in the groove, securing the fixing plate to the board body. During disassembly, the torsion bracket is twisted in the opposite direction, and the sliding block moves out of the groove. This design solves the time-consuming problem of traditional screw fixing requiring individual unscrewing, improving the efficiency of board installation and disassembly.
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Description

Technical Field

[0001] This utility model relates to the field of extruded polystyrene board technology, and in particular to an XPS extruded polystyrene board with a flame-retardant structure. Background Technology

[0002] XPS extruded polystyrene board is a rigid foam plastic board made from polystyrene resin through a special process of continuous extrusion foaming. It has an independent closed-cell structure inside, which makes it highly resistant to pressure, non-absorbent, moisture-proof, lightweight, corrosion-resistant, and long-lasting. It has a low thermal conductivity and excellent thermal insulation performance. It is widely used in building roof insulation, wall insulation, underfloor heating insulation, and base paving of highways and airport runways. It is a highly efficient thermal insulation material favored in the field of building energy conservation.

[0003] XPS extruded polystyrene boards with flame-retardant structures are rigid foam boards that possess flame-retardant properties through the addition of flame retardants or special processing. By adding phosphorus-based and intumescent flame retardants and optimizing the production process to ensure uniform dispersion of the flame retardants, and by designing a fine closed-cell or composite layer structure, they achieve flame-retardant effects that inhibit combustion and block heat and oxygen. Existing XPS extruded polystyrene boards are attached to walls using adhesives, but after a long period of time, the adhesive strength gradually decreases, causing the XPS extruded polystyrene boards to detach from the wall. Current technology uses screws to fix the XPS extruded polystyrene boards to the wall, which can make them more secure, but when it is necessary to disassemble and recycle the XPS extruded polystyrene boards, each screw must be unscrewed one by one, which is very time-consuming and laborious. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an XPS extruded board with a flame-retardant structure, which aims to improve the existing technology of fixing the board to the wall with screws and holes, which can make the board more secure, but when the board needs to be disassembled and recycled, each screw needs to be unscrewed one by one, which is very time-consuming and laborious.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an XPS extruded board with a flame-retardant structure, comprising a board body, wherein a fixing mechanism is installed at both the upper and lower ends of the board body, the fixing mechanism being used to fix the board body to a wall, and multiple connecting mechanisms are installed on adjacent sides of the outer wall of the board body, the multiple connecting mechanisms being used to connect multiple boards together; the fixing mechanism includes a fixing plate, the fixing plate being installed at the upper and lower ends of the board body, a torsion frame being rotatably connected to the front side of the outer wall of the fixing plate, a bevel gear one being fixedly connected to the middle of the outer wall of the torsion frame, bevel gear two being meshed at the left and right ends of the rear side of the outer wall of the bevel gear one, threaded rods being fixedly connected to the outer wall of the bevel gear two on the opposite side, expansion bolts being fixedly connected to the four corners of the fixing plate, a sliding block being threadedly connected to the middle of the outer wall of the threaded rod, and a retaining ring being installed on the front side of the fixing plate, the outer wall of the retaining ring being fixedly connected to the inner wall of the board body.

[0006] As a further description of the above technical solution:

[0007] The connecting mechanism includes a slide cylinder, which is installed on an adjacent side of the outer wall of the plate. Fixed blocks are fixedly connected to the upper and lower ends of the left side of the slide cylinder's outer wall. Limiting rings are fixedly connected to the front and rear ends of the right side of the fixed blocks' outer wall. A rotating plate is installed on the right side of the fixed blocks' outer wall. The inner wall of the limiting rings is rotatably connected to the left end of the rotating plate's outer wall. A spring is fixedly connected to an adjacent side of the rotating plate's outer wall. An adjacent end of the spring's outer wall is fixedly connected to the outer wall of the slide cylinder. Multiple locking cones are equidistantly fixed to the right end of the rotating plate's outer wall on the opposite side. A connecting post is installed on the left side of the plate's outer wall. The outer wall of the connecting post is slidably connected to the inner wall of the slide cylinder. Limiting plates are installed at the upper and lower ends of the connecting post's outer wall. A second spring is installed on the outer wall of the connecting post.

[0008] As a further description of the above technical solution:

[0009] Each of the threaded rods on the opposite side is rotatably connected to a limiting frame, and the rear side of the outer wall of the limiting frame is fixedly connected to the front side of the outer wall of the fixing plate.

[0010] As a further description of the above technical solution:

[0011] A sliding groove is provided in the middle of the front side of the outer wall of the fixing plate, and the inside of the sliding groove is slidably connected to the bottom of the outer wall of the sliding block.

[0012] As a further description of the above technical solution:

[0013] The inner wall of the retaining ring is provided with retaining grooves on both the left and right sides, and the inside of the retaining grooves is slidably connected to the front end of the outer wall of the sliding block.

[0014] As a further description of the above technical solution:

[0015] Multiple limiting grooves are equally spaced on the right end of the adjacent side of the outer wall of the limiting plate, and the interior of the limiting groove is slidably connected to the outer wall of the card cone.

[0016] As a further description of the above technical solution:

[0017] A second spring is installed on the outer wall of the connecting column, and the interior of the second spring is slidably connected to the outer wall of the connecting column.

[0018] As a further description of the above technical solution:

[0019] Multiple long plates are fixedly connected at equal intervals on the left side of the outer wall of the plate. The left side of the outer wall of the long plate is fixedly connected to the right side of the outer wall of the connecting column. The right end of the outer wall of the second spring is fixedly connected to the left side of the outer wall of the long plate. The right side of the outer wall of the limiting plate is fixedly connected to the left side of the outer wall of the long plate.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the torsion frame can drive two bevel gears to rotate synchronously through the first bevel gear. The threaded rod welded in the middle of the second bevel gear can only rotate in place due to the restriction of the positioning frame. When the threaded rod rotates, the sliding block connected by the outer thread slides in the groove, and the front end can be locked into the groove of the retaining ring, so that the fixing plate is firmly connected to the plate body. When disassembling, the torsion frame is twisted in the opposite direction and the sliding block is moved out of the groove. This design solves the time-consuming problem of traditional screw fixing that requires unscrewing one by one, and improves the efficiency of plate installation and disassembly.

[0022] 2. In this utility model, when the sliding cylinder and the connecting column move towards each other, the outer limiting plate of the connecting column squeezes the rotating plate to make it rotate towards the sliding cylinder. When the elastic action of the first spring moves the locking cone to the locking groove, the locking block is locked into the locking groove, realizing the quick connection between the plates. When disassembling, press the rotating plate, and use the elasticity of the second spring to pop the connecting column out of the sliding cylinder. This design solves the problem that traditional splicing requires the application of adhesive, which is time-consuming and difficult to disassemble, and improves the efficiency of plate connection and disassembly. Attached Figure Description

[0023] Figure 1 This is a front view of an XPS extruded board with a flame-retardant structure proposed in this utility model.

[0024] Figure 2 for Figure 1 Enlarged view at point A;

[0025] Figure 3 This is a perspective view of an XPS extruded board with a flame-retardant structure proposed in this utility model.

[0026] Figure 4This is a side view of an XPS extruded board with a flame-retardant structure proposed in this utility model.

[0027] Figure 5 for Figure 4 Enlarged view at point B;

[0028] Figure 6 This is an exploded view of the fixing mechanism of XPS extruded board with flame-retardant structure proposed in this utility model.

[0029] Figure 7 This is an exploded view of a connection mechanism for an XPS extruded board with a flame-retardant structure proposed in this utility model.

[0030] Legend:

[0031] 1. Plate body; 2. Fixing mechanism; 201. Fixing plate; 202. Torsion frame; 203. Bevel gear one; 204. Bevel gear two; 205. Threaded rod; 206. Limiting frame; 207. Expansion bolt; 208. Sliding block; 209. Slide groove; 210. Snap ring; 211. Snap groove; 3. Connecting mechanism; 301. Slide cylinder; 302. Fixing block; 303. Limiting ring; 304. Rotating plate; 305. Spring one; 306. Snap cone; 307. Connecting column; 308. Limiting plate; 309. Limiting groove; 310. Spring two; 311. Long plate. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 1 , Figure 3 and Figure 6This utility model provides an embodiment of an XPS extruded board with a flame-retardant structure, comprising a board body 1. Fixing mechanisms 2 are installed at both the upper and lower ends of the board body 1 to fix the board body 1 to a wall. Multiple connecting mechanisms 3 are installed on adjacent sides of the outer wall of the board body 1 to connect multiple boards 1 together. The fixing mechanism 2 includes a fixing plate 201 installed at the upper and lower ends of the board body 1. A torsion bracket 202 is rotatably connected to the front side of the outer wall of the fixing plate 201. A bevel gear 203 is fixedly connected to the middle of the outer wall of the torsion bracket 202. Bevel gears 204 are meshed with the left and right ends of the rear side of the outer wall of bevel gears 203. Screws are fixedly connected to the outer walls of bevel gears 204 on opposite sides. The threaded rod 205 and the four corners of the fixing plate 201 are all fixedly connected with expansion bolts 207. The outer wall of the threaded rod 205 is threadedly connected with a sliding block 208. The front side of the fixing plate 201 is equipped with a retaining ring 210. The outer wall of the retaining ring 210 is fixedly connected to the inner wall of the plate 1. The opposite sides of the threaded rod 205 are rotatably connected with a limit frame 206. The rear side of the outer wall of the limit frame 206 is fixedly connected to the front side of the outer wall of the fixing plate 201. The middle of the front side of the outer wall of the fixing plate 201 is provided with a sliding groove 209. The inside of the sliding groove 209 is slidably connected to the bottom of the outer wall of the sliding block 208. The left and right sides of the inner wall of the retaining ring 210 are provided with a retaining groove 211. The inside of the retaining groove 211 is slidably connected to the front end of the outer wall of the sliding block 208.

[0034] Specifically, when an external force is applied to the torsion frame 202, causing it to twist, the torsion frame 202 causes the bevel gear 204 to rotate synchronously via the first bevel gear 203. The middle part of the second bevel gear 204 is welded and fixed to the threaded rod 205. As the second bevel gear 204 rotates, the threaded rod 205 also rotates in its original position. On the outer side of the threaded rod 205, a sliding block 208 is installed through a threaded engagement. At the same time, the sliding groove 209 provides a movement track for the sliding block 208. When the threaded rod 205 rotates, its threaded structure interacts with the sliding block 208, causing the sliding block 208 to slide along the direction of the sliding groove 209. As the sliding block 208 continues to slide, its front end gradually approaches the slot 211 inside the retaining ring 210 and eventually engages with it. When the sliding block 208 is fully engaged in the slot 211, a stable connection is formed between the fixing plate 201 and the plate body 1, achieving a secure fixation. When it is necessary to disassemble the plate body 1, simply twist the torsion bracket 202 in the opposite direction, causing the bevel gear 204 to rotate in the opposite direction, which in turn drives the threaded rod 205 to rotate in the opposite direction. The sliding block 208 will then move out of the slot 211 under the action of the threaded transmission, releasing the connection between the fixing plate 201 and the plate body 1. This device greatly improves the efficiency of installing and disassembling the plate body 1 through its innovative transmission and engagement structure.

[0035] Reference Figure 2 and Figure 7The connecting mechanism 3 includes a slide cylinder 301, which is installed on the outer wall of the plate 1 adjacent to one side. Fixing blocks 302 are fixedly connected to the upper and lower ends of the left side of the slide cylinder 301. Limiting rings 303 are fixedly connected to the front and rear ends of the right side of the fixing blocks 302. A rotating plate 304 is installed on the right side of the outer wall of the fixing blocks 302. The inner wall of the limiting rings 303 is rotatably connected to the left end of the outer wall of the rotating plate 304. Springs 305 are fixedly connected to the adjacent side of the outer wall of the rotating plate 304. One end of the outer wall of the springs 305 is fixedly connected to the outer wall of the slide cylinder 301. The outer walls of the rotating plate 304 are far apart. Multiple snap cones 306 are fixedly connected at equal intervals on one right side. A connecting post 307 is installed on the left side of the outer wall of the plate 1. The outer wall of the connecting post 307 is slidably connected to the inner wall of the slide cylinder 301. Limiting plates 308 are installed at the upper and lower ends of the outer wall of the connecting post 307. A second spring 310 is installed on the outer wall of the connecting post 307. Multiple limiting grooves 309 are equally spaced on the right side of the adjacent side of the outer wall of the limiting plate 308. The inside of the limiting groove 309 is slidably connected to the outer wall of the snap cone 306. A second spring 310 is installed on the outer wall of the connecting post 307. The inside of the second spring 310 is slidably connected to the outer wall of the connecting post 307.

[0036] Specifically, when the slide cylinder 301 and the connecting post 307 begin to move towards each other, the limiting plate 308 installed on the outside of the connecting post 307 contacts the rotating plate 304 and applies a squeezing force. Under the squeezing of the limiting plate 308, the rotating plate 304 rotates towards the slide cylinder 301 with a specific fulcrum as the center. During this process, the spring 305 connected to the rotating plate 304 undergoes elastic deformation and accumulates elastic potential energy. As the slide cylinder 301 and the connecting post 307 continue to approach each other, when the locking cone 306 moves to the corresponding position of the limiting groove 309, the elastic potential energy accumulated by the spring 305 is released instantaneously, and the resulting elastic force pushes the locking cone 306. 06 is embedded inside the limiting groove 309. Through a tight snap-fit ​​structure, a quick and stable connection between each plate 1 is achieved. When it is necessary to disassemble the connected plate 1, simply press the rotating plate 304 manually to make the rotating plate 304 rotate in the opposite direction. The spring 310, which is in a pre-compressed state, can use its elasticity to pop the connecting post 307 out of the slide cylinder 301, thereby releasing the connection between the plates 1. This design effectively solves the problem that in the past, each plate 1 had to be covered with adhesive when splicing, which was not only time-consuming and labor-intensive, but also extremely difficult to disassemble due to the hardening of the adhesive. It significantly improves the efficiency and convenience of splicing and disassembling the plates 1.

[0037] Reference Figure 4 and Figure 5Multiple long plates 311 are fixedly connected at equal intervals on the left side of the outer wall of the plate 1. The left side of the outer wall of the long plate 311 is fixedly connected to the right side of the outer wall of the connecting column 307. The right end of the outer wall of the second spring 310 is fixedly connected to the left side of the outer wall of the long plate 311. The right side of the outer wall of the limiting plate 308 is fixedly connected to the left side of the long plate 311. This is used to fix the limiting plate 308, the connecting column 307 and the second spring 310 in the connecting mechanism 3 together to achieve a stable connection.

[0038] Specifically, multiple long plates 311 are evenly distributed and fixedly connected at specific intervals on the left side of the outer wall of plate 1. The left side of the outer wall of the long plates 311 is connected to the right side of the outer wall of the connecting column 307 by a stable fixing method, forming a support base for the connecting column 307 to ensure its stability during operation. The right end of the outer wall of spring 2 310 is tightly fixed to the left side of the outer wall of the long plate 311. This connection allows spring 2 310 to achieve elastic deformation and energy storage by relying on the long plate 311. The right side of the outer wall of the limiting plate 308 is also fixed to the left side of the outer wall of the long plate 311. Through the medium of the long plate 311, the limiting plate 308, the connecting column 307 and spring 2 310 are tightly combined, providing a solid and reliable structural support for the overall operation of the connecting mechanism 3 and ensuring the stability and reliability of each component when working together.

[0039] Working principle: The torsion frame 202 moves the sliding block 208 and locks it in the slot 211 within the retaining ring 210, thus tightly connecting the plate 1 to the wall. Expansion bolts are installed around the fixed plate 201 to secure it to the wall. The sliding block 208 can pass through the sliding groove 209 on the front side of the fixed plate 201. The torsion frame 202 is installed inside the sliding groove 209 and can only rotate in place. The outer ends of the bevel gear 203 welded to the outside of the torsion frame 202 mesh with bevel gears 204. Therefore, when the torsion frame 202 is twisted, it causes the two bevel gears 204 to rotate synchronously via the bevel gear 203. Threaded rods 205 are welded to the middle of each bevel gear 204. The limiting bracket 206 installed at one end can restrict the threaded rod 205 to rotate only in place. A sliding block 208 is installed on the outside of the threaded rod 205 by thread. So when the bevel gear 204 rotates, it will drive the threaded rod 205 to rotate in place, so that the sliding block 208 slides in the slide groove 209, and then its front end is locked in the slot 211 in the retaining ring 210, so that the fixing plate 201 is firmly connected to the plate body 1. When disassembly is required, simply twist the torsion bracket 202 in the opposite direction to move the sliding block 208 out of the slot 211. This solves the problem that fixing the plate body 1 to the wall with screws can make it more secure, but when the plate body 1 needs to be disassembled and recycled, each screw needs to be unscrewed one by one, which is very time-consuming and laborious.

[0040] By moving the snap cones 306 into the limiting grooves 309, a quick connection between the plates 1 can be achieved. Multiple fixing blocks 302 are welded to the outside of the slide cylinder 301, and multiple limiting rings 303 fix the rotating plate 304, allowing it to rotate only along the axis of the limiting rings 303. A connecting post 307 installed on the right side of the slide cylinder 301 can slide inside it. A spring 310 with the same diameter as the outer wall diameter of the slide cylinder 301 is installed on the outside of the connecting post 307. The spring 310 can be pushed by the slide cylinder 301, thus compressing the spring 310. Multiple snap cones 306, equidistantly installed on the outside of the rotating plate 304, can be locked into the limiting grooves 309. When the slide cylinder 301 and the connecting post 307 move towards each other, the spring 306 is fixed and can rotate only along the axis of the limiting rings 303. When the limiting plate 308 is pressed, the rotating plate 304 will rotate towards the slide cylinder 301. Due to the elasticity of the spring 305, when the locking cone 306 moves to the position of the limiting groove 309, the elasticity of the spring 305 will make the locking cone 306 fasten inside the limiting groove 309, realizing the quick connection between the plates 1. When disassembly is required, simply press the rotating plate 304. Due to the elasticity of the spring 310, the connecting post 307 can be popped out from inside the slide cylinder 301, thereby realizing the quick connection and separation between the plates 1. Through its surface fine closed pores or composite layer structure, it can achieve the flame-retardant effect of suppressing combustion, blocking heat and oxygen in any required area, solving the problem that each plate 1 needs to be coated with adhesive when splicing, which is time-consuming and labor-intensive, and extremely difficult to disassemble.

[0041] 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. An XPS extruded polystyrene board with a flame-retardant structure, comprising a board body (1), characterized in that: The upper and lower ends of the plate (1) are each equipped with a fixing mechanism (2), which is used to fix the plate (1) to the wall. Multiple connecting mechanisms (3) are installed on adjacent sides of the outer wall of the plate (1), which are used to connect multiple plates (1) together. The fixing mechanism (2) includes a fixing plate (201), which is installed on the upper and lower ends of the plate body (1). A torsion frame (202) is rotatably connected to the front side of the outer wall of the fixing plate (201). A bevel gear (203) is fixedly connected to the middle of the outer wall of the torsion frame (202). A bevel gear (204) is meshed with the left and right ends of the rear side of the outer wall of the bevel gear (203). A threaded rod (205) is fixedly connected to the outer wall of the bevel gear (204) on the side away from each other. An expansion bolt (207) is fixedly connected to the four corners of the fixing plate (201). A sliding block (208) is threadedly connected to the middle of the outer wall of the threaded rod (205). A retaining ring (210) is installed on the front side of the fixing plate (201). The outer wall of the retaining ring (210) is fixedly connected to the inner wall of the plate body (1).

2. The XPS extruded board with a flame-retardant structure according to claim 1, characterized in that: The connecting mechanism (3) includes a slide cylinder (301), which is installed on the adjacent side of the outer wall of the plate (1). Fixing blocks (302) are fixedly connected to the upper and lower ends of the left side of the outer wall of the slide cylinder (301). Limiting rings (303) are fixedly connected to the front and rear ends of the right side of the outer wall of the fixing blocks (302). A rotating plate (304) is installed on the right side of the outer wall of the fixing blocks (302). The inner wall of the limiting ring (303) is rotatably connected to the left end of the outer wall of the rotating plate (304). The adjacent side of the outer wall of the rotating plate (304) is fixedly connected to… There is a spring (305), and one end of the outer wall of the spring (305) is fixedly connected to the outer wall of the slide cylinder (301). Multiple locking cones (306) are fixedly connected at equal intervals on the right side of the outer wall of the rotating plate (304) away from each other. A connecting column (307) is installed on the left side of the outer wall of the plate (1). The outer wall of the connecting column (307) is slidably connected to the inner wall of the slide cylinder (301). Limiting plates (308) are installed at the upper and lower ends of the outer wall of the connecting column (307). A spring (310) is installed on the outer wall of the connecting column (307).

3. The XPS extruded board with a flame-retardant structure according to claim 1, characterized in that: The threaded rod (205) is rotatably connected to a limiting frame (206) on the opposite side, and the rear side of the outer wall of the limiting frame (206) is fixedly connected to the front side of the outer wall of the fixing plate (201).

4. The XPS extruded board with a flame-retardant structure according to claim 1, characterized in that: A groove (209) is provided in the middle of the front side of the outer wall of the fixing plate (201), and the interior of the groove (209) is slidably connected to the bottom of the outer wall of the sliding block (208).

5. An XPS extruded board with a flame-retardant structure according to claim 1, characterized in that: The inner wall of the retaining ring (210) is provided with a retaining groove (211) on both the left and right sides, and the inside of the retaining groove (211) is slidably connected to the front end of the outer wall of the sliding block (208).

6. An XPS extruded board with a flame-retardant structure according to claim 2, characterized in that: The outer wall of the limiting plate (308) is provided with multiple limiting grooves (309) at equal intervals on the right end of the adjacent side. The interior of the limiting groove (309) is slidably connected to the outer wall of the snap cone (306).

7. An XPS extruded board with a flame-retardant structure according to claim 2, characterized in that: A second spring (310) is installed on the outer wall of the connecting column (307), and the interior of the second spring (310) is slidably connected to the outer wall of the connecting column (307).

8. An XPS extruded board with a flame-retardant structure according to claim 2, characterized in that: Multiple long plates (311) are fixedly connected at equal intervals on the left side of the outer wall of the plate (1). The left side of the outer wall of the long plate (311) is fixedly connected to the right side of the outer wall of the connecting column (307). The right end of the outer wall of the second spring (310) is fixedly connected to the left side of the outer wall of the long plate (311). The right side of the outer wall of the limiting plate (308) is fixedly connected to the left side of the outer wall of the long plate (311).