Fire-resistant heat-preservation rock wool pipe

Abstract

The invention discloses a fire-resistant heat preservation rock wool pipe, and relates to the technical field of pipelines, the fire-resistant heat preservation rock wool pipe comprises a heat preservation structure and a reinforcing mechanism, the heat preservation structure is used for being arranged outside the pipeline in a sleeving mode for heat preservation, the heat preservation structure comprises a through pipe part, an inserting end and a bearing end, and the inserting end and the bearing end are located at the two ends of the through pipe part respectively; when the inserting end of one heat preservation structure is combined with the bearing end of the other adjacent heat preservation structure in an inserting mode, a reinforcing mechanism is arranged outside the inserting position of the heat preservation structure, and the reinforcing mechanism is used for moving the inserting end to the sealing position in the direction close to the bearing end. According to the fire-resistant heat-preservation rock wool pipe, through the reinforcing mechanism, the bearing end is pushed and moved to the combined splicing of the bearing end and the inserting end, the sealing effect of the heat-preservation structures at the splicing positions of the adjacent heat-preservation structures is guaranteed, follow-up disassembly is facilitated, and no foreign matter is left on the surface of the pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of pipelines, and in particular relates to a fire-resistant and heat-insulating rock wool pipe. Background Art

[0002] Rock wool is an insulating material made of molten rock, which has good thermal insulation and high temperature resistance. Rock wool pipes made of rock wool can be put on pipelines to effectively reduce the conduction and convection loss of temperature inside and outside the pipelines. Rock wool pipes are widely used in industry and construction due to their excellent thermal insulation and durability.

[0003] When the existing rock wool pipe is actually used, the rock wool pipe is put on the pipe through the opening of the rock wool pipe, and the opening is sealed with the help of the aluminum film adhesive tape set on the outermost surface of the rock wool pipe near the opening, and the aluminum film adhesive tape is pasted on the pipe at the end position in the axial direction of the pipe. However, when the pipe needs to be repaired or the rock wool pipe is replaced, the rock wool pipe is disassembled, and the position where the aluminum film adhesive tape is pasted is directly cut with a knife, resulting in residual adhesive tape on the surface of the pipe. After the pipe repair is completed and the rock wool pipe is reinstalled or a new rock wool pipe is replaced, the aluminum film adhesive tape needs to be pasted on the pipe again, resulting in the accumulation of residual aluminum film adhesive tape at the pasting position on the pipe, and the pasting is uneven, which affects the sealing at this position, thereby affecting the thermal insulation effect of the rock wool pipe. Summary of the invention

[0004] The purpose of the present invention is to provide a fire-resistant and heat-insulating rock wool pipe with a simple structure and reasonable design in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A fire-resistant thermal insulation rock wool pipe comprises a thermal insulation structure and a reinforcement mechanism, wherein the thermal insulation structure is used to be sleeved on the outside of a pipe for thermal insulation, the thermal insulation structure comprises a through-tube portion, a plug-in end and a receiving end, the plug-in end and the receiving end are respectively located at the two ends of the through-tube portion, when the plug-in end of one thermal insulation structure is plugged and combined with the receiving end of another adjacent thermal insulation structure, a reinforcement mechanism is provided on the outside of the plug-in position of the thermal insulation structure, and the reinforcement mechanism is used to move the plug-in end toward the receiving end to a sealing position.

[0007] As a further optimization scheme of the present invention, the reinforcement mechanism includes a tie plate, a first sealing plate and a second sealing plate, the first sealing plate and the second sealing plate are respectively fixedly connected to the tie plate and are respectively located on the side of the tie plate facing the thermal insulation structure, a first sealing groove is provided on the receiving end of the thermal insulation structure, the first sealing groove has an inclined surface, and the inclined surface is arranged toward the outer end of the receiving end, the first sealing plate is arranged corresponding to the first sealing groove, a second sealing groove is provided on the plug-in end of the thermal insulation structure, and the second sealing plate is arranged corresponding to the second sealing groove;

[0008] When the tie plate is tightened to the reinforcement position, the friction contact position between the first sealing plate and the inclined surface of the first sealing groove is relatively shifted from the high point position of the inclined surface to the low point position of the inclined surface, and the area between the first sealing plate and the second sealing plate is the sealing area.

[0009] As a further optimization scheme of the present invention, there are multiple first sealing plates and multiple second sealing plates. When the tie plate is tightened to the reinforcement position, the multiple first sealing plates are evenly distributed along the circumference of the pipeline, and adjacent first sealing plates are sealed and abutted against each other, and the multiple second sealing plates are evenly distributed along the circumference of the pipeline, and adjacent second sealing plates are sealed and abutted against each other.

[0010] As a further optimization scheme of the present invention, the open end of the tie plate is fastened closed by fastening bolts, wherein the head and tail ends of the tie plate, the head and tail ends of the first sealing plate and the head and tail ends of the second sealing plate are respectively provided with sealing gaskets.

[0011] As a further optimization scheme of the present invention, an inner sealing plate is arranged on the outer circumferential surface of the plug-in end, and an inner sealing groove is opened on the inner circumferential surface of the receiving end. The inner sealing groove is arranged corresponding to the inner sealing plate, and the inner sealing groove has an inclined surface, and the inclined surface of the inner sealing groove is arranged toward the outer end of the receiving end.

[0012] As a further optimization solution of the present invention, the surface hardness of the plug-in end and the surface hardness of the receiving end are respectively greater than the surface hardness of the through-tube portion.

[0013] As a further optimization scheme of the present invention, a propulsion auxiliary component is provided on the tie plate, and the propulsion auxiliary component is located on the side of the first sealing plate away from the second sealing plate, and the propulsion auxiliary component is in frictional contact with the outer circumferential surface of the receiving end.

[0014] As a further optimization scheme of the present invention, the propulsion auxiliary component includes a first clamping rod and a first spring, one end of the first clamping rod is rotatably connected to the tie plate, the other end of the first clamping rod is frictionally contacted with the outer circumferential surface of the receiving end, and the friction contact end of the first clamping rod is arranged close to the first sealing plate, the side of the first clamping rod is fixedly connected with the first spring, and the other end of the first spring is fixedly connected to the tie plate.

[0015] As a further optimization scheme of the present invention, a reinforcement component is also provided on the tie plate, and the reinforcement component is used to reinforce the insulation structure on the pipe. The reinforcement component includes a second clamping rod and a second spring. One end of the second clamping rod is rotatably connected to the tie plate, and the other end of the second clamping rod is frictionally contacted with the outer circumferential surface of the plug-in end, and the friction contact end of the second clamping rod is arranged close to the second sealing plate. The side of the second clamping rod is fixedly connected to the second spring, and the other two ends of the second spring are fixedly connected to the tie plate.

[0016] As a further optimization scheme of the present invention, the thermal insulation structure includes a flame retardant layer, a rock wool core, a thermal insulation layer and a protective layer, and the flame retardant layer, rock wool core, thermal insulation layer and protective layer are sequentially distributed from inside to outside along the pipe diameter direction of the thermal insulation structure.

[0017] The present invention has at least the following beneficial effects: the fire-resistant thermal insulation rock wool pipe provided by the present invention is provided with a thermal insulation structure and a reinforcement mechanism to provide fire-resistant thermal insulation protection for the pipeline, and when the tie plate in the reinforcement mechanism is tightened, the first sealing plate and the inner sealing plate are squeezed and transmitted to the receiving end, so that the receiving end is moved toward the plug-in end, thereby realizing the combined splicing of adjacent thermal insulation structures and effectively sealing the splicing position of the thermal insulation structure, and by means of the first clamping rod and the second clamping rod, the thermal insulation structure is clamped at multiple points, effectively ensuring the locking and reinforcement of the thermal insulation structure on the pipeline, avoiding loosening caused by collision with foreign objects, resulting in poor sealing effect at the splicing position;

[0018] Moreover, when disassembling the insulation structure, you only need to open the tie plate to release the reinforcement lock of the insulation structure, thereby avoiding the situation where the axial end of the insulation structure is directly attached to the pipe due to the aluminum film adhesive tape, resulting in foreign matter remaining on the pipe surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial cross-sectional structural schematic diagram of the existing pipeline and thermal insulation structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the thermal insulation structure of the present invention;

[0022] Figure 4 is a partial cross-sectional structural schematic diagram of the fastening mechanism of the present invention when it is in the initial position;

[0023] Figure 5 The present invention Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6It is a partial cross-sectional structural schematic diagram of the fastening mechanism of the present invention when it is in the fastening position;

[0025] Figure 7 It is a schematic diagram of the side structure of the fastening mechanism of the present invention;

[0026] Figure 8 It is a schematic structural diagram of the tie plate and the first sealing plate of the present invention when they are unfolded.

[0027] In the figure: 1. pipeline; 2. aluminum film adhesive tape; 3. thermal insulation structure; 31. plug-in end; 32. through-pipe part; 321. flame retardant layer; 322. rock wool core; 323. thermal insulation layer; 324. protective layer; 33. receiving end; 4. reinforcement mechanism; 41. first clamping rod; 42. first spring; 43. first sealing plate; 431. first sealing groove; 44. second sealing plate; 441. second sealing groove; 45. tie plate; 46. second spring; 47. second clamping rod; 48. inner sealing plate; 481. inner sealing groove; 49. fastening bolts. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0029] like Figure 1 As shown, after the heat preservation structure 3 is sheathed on the outside of the conventional pipe 1, not only the outer part of the sleeve opening of the heat preservation structure 3 is sealed with the aluminum film adhesive tape 2, but also the axial end position of the heat preservation structure 3 is pasted with the aluminum film adhesive tape 2 to seal the end position of the heat preservation structure 3 and the pipe 1. At this time, the aluminum film adhesive tape 2 is directly pasted on the surface of the pipe 1. When the pipe 1 needs to be repaired or the heat preservation structure 3 needs to be replaced, the heat preservation structure 3 is disassembled, and the pasting position of the aluminum film adhesive tape 2 is directly cut with a blade, resulting in residual on the surface of the pipe 1. After the pipe 1 is repaired and the insulation structure 3 is reinstalled or a new insulation structure 3 is replaced, the aluminum film adhesive tape 2 needs to be re-pasted on the pipe 1, resulting in accumulation of residual aluminum film adhesive tape 2 at the pasting position on the pipe 1, and uneven pasting, which affects the sealing at this position. Alternatively, when the insulation structure 3 is subsequently installed, the insulation structure 3 at this position cannot be well attached to the pipe 1 due to the accumulation of residual adhesive tape, thereby affecting the insulation effect of the insulation structure 3, and the pipe 1 may be scratched if the operation is not careful, which is unsafe.

[0030] Therefore, in one embodiment, if Figures 2 to 8As shown, a fire-resistant thermal insulation rock wool pipe provided by the present invention includes a thermal insulation structure 3 and a reinforcement mechanism 4. The thermal insulation structure 3 is used to be sleeved on the outside of the pipeline 1 for thermal insulation. The thermal insulation structure 3 includes a through-tube portion 32, a plug-in end 31 and a receiving end 33. The plug-in end 31 and the receiving end 33 are respectively located at the two ends of the through-tube portion 32. When the plug-in end 31 of one thermal insulation structure 3 and the receiving end 33 of another adjacent thermal insulation structure 3 are plugged and combined, a reinforcement mechanism 4 is provided outside the plug-in position of the thermal insulation structure 3. The reinforcement mechanism 4 is used to move the plug-in end 31 to a sealing position in a direction close to the receiving end 33. Thus, the thermal insulation structure 3 is fastened and installed on the pipeline 1 with the help of the reinforcement mechanism 4, and the sealing effect at the splicing and combination position of the thermal insulation structure 3 is ensured, and the disassembly is convenient, and no foreign matter will remain on the surface of the pipeline 1.

[0031] It should be noted that the sealing abutment surfaces of the receiving end 33 and the plug end 31 of the thermal insulation structure 3 are L-shaped, which increases the contact area between the two, thereby ensuring the sealing effect of the splicing position when adjacent thermal insulation structures 3 are combined and spliced ​​together.

[0032] Among them, Figure 3 As shown, the thermal insulation structure 3 includes a flame retardant layer 321, a rock wool core 322, a thermal insulation layer 323 and a protective layer 324, and the flame retardant layer 321, the rock wool core 322, the thermal insulation layer 323 and the protective layer 324 are sequentially arranged from the inside to the outside along the pipe diameter direction of the thermal insulation structure 3. The thermal insulation structure 3 with the above structural layers has fire-resistant and thermal insulation properties.

[0033] Exemplarily, the flame retardant layer 321 is made of aluminum film material, the thermal insulation layer 323 is made of fiberglass reinforced plastic material, and the protective layer 324 is made of ultra-high molecular weight polyethylene material.

[0034] For example, Figure 4 and Figure 6 As shown, the reinforcement mechanism 4 includes a tie plate 45, a first sealing plate 43 and a second sealing plate 44. The first sealing plate 43 and the second sealing plate 44 are respectively fixedly connected to the tie plate 45 and are respectively located on the side of the tie plate 45 facing the insulation structure 3. A first sealing groove 431 is opened on the receiving end 33 of the insulation structure 3. Figure 5 As shown, the first sealing groove 431 has an inclined surface, and the inclined surface is arranged toward the outer end of the receiving end 33, the first sealing plate 43 is arranged corresponding to the first sealing groove 431, the plug-in end 31 of the thermal insulation structure 3 is provided with a second sealing groove 441, and the second sealing plate 44 is arranged corresponding to the second sealing groove 441;

[0035] When the tie plate 45 is tightened to the reinforcement position, the friction contact position between the first sealing plate 43 and the inclined surface of the first sealing groove 431 is relatively shifted from the high point position of the inclined surface to the low point position of the inclined surface, that is, when the tie plate 45 is tightened, the tie plate 45 will drive the first sealing plate 43 to move toward the receiving end 33, so that the first sealing plate 43 contacts the transmission receiving end 33 through the first sealing groove 431, causing the receiving end 33 to move toward Figure 6 The position of the second sealing plate 44 and the second sealing groove 441 is relatively fixed, and the area between the first sealing plate 43 and the second sealing plate 44 is a sealing area, so that the first sealing plate 43 can squeeze and clamp the receiving end 33, and the second sealing plate 44 can squeeze and clamp the plug-in end 31, so as to achieve the reinforcement and sealing of the plug-in combination position of the adjacent thermal insulation structure 3, so that the thermal insulation structure 3 fits tightly on the pipeline 1, and avoids the thermal insulation structure 3 from being misaligned with the pipeline 1 when it is hit by foreign objects, dragging the adjacent thermal insulation structure 3, and affecting the sealing effect of the thermal insulation structure 3 at the splicing position.

[0036] For example, Figure 7 As shown, the open end of the tie plate 45 is fastened and closed by a fastening bolt 49, wherein the head and tail ends of the tie plate 45, the head and tail ends of the first sealing plate 43, and the head and tail ends of the second sealing plate 44 are respectively provided with sealing gaskets, so that when the tie plate 45 is tightened and closed by the fastening bolts 49, the sealing gaskets of the head and tail ends of the tie plate 45, the head and tail ends of the first sealing plate 43, and the head and tail ends of the second sealing plate 44 respectively abut and seal correspondingly, thereby ensuring the sealing effect of the sealing area between the first sealing plate 43 and the second sealing plate 44.

[0037] For example, Figure 7 and Figure 8 As shown, there are multiple first sealing plates 43 and multiple second sealing plates 44. When the tie plate 45 is tightened to the reinforcement position, multiple first sealing plates 43 are evenly distributed along the circumference of the pipeline 1, and adjacent first sealing plates 43 are sealed and abutted, and multiple second sealing plates 44 are evenly distributed along the circumference of the pipeline 1, and adjacent second sealing plates 44 are sealed and abutted. The multiple first sealing plates 43 and second sealing plates 44 in the tightened position are evenly distributed around the pipeline 1 along the circumference of the pipeline 1, and the abutment force of the two on the thermal insulation structure 3 is uniform.

[0038] In one embodiment, continue to refer to Figures 4 to 6 An inner sealing plate 48 is arranged on the outer circumferential surface of the plug-in end 31, and an inner sealing groove 481 is opened on the inner circumferential surface of the receiving end 33. The inner sealing groove 481 is arranged corresponding to the inner sealing plate 48, and the inner sealing groove 481 has an inclined surface, and the inclined surface of the inner sealing groove 481 is arranged toward the outer end of the receiving end 33.

[0039] Through the transmission cooperation between the first sealing plate 43 and the first sealing groove 431, and the transmission cooperation between the inner sealing plate 48 and the inner sealing groove 481, the inner and outer double clamping and pushing of the receiving end 33 are realized, which fully ensures that the receiving end 33 is pushed to the sealing position on the plug-in end 31 to ensure the sealing effect.

[0040] It should be noted that the surface hardness of the plug end 31 and the surface hardness of the receiving end 33 are respectively greater than the surface hardness of the through-tube portion 32 , so that the plug end 31 and the receiving end 33 are sufficient to withstand the reinforcement locking strength applied by the reinforcement mechanism 4 .

[0041] In one embodiment, continue to refer to Figures 4 to 6 The tie plate 45 is provided with a propulsion auxiliary component, which is located on the side of the first sealing plate 43 away from the second sealing plate 44. The propulsion auxiliary component frictionally contacts the outer circumferential surface of the receiving end 33 to assist in pushing the receiving end 33 toward the plug end 31.

[0042] For example, Figure 5 As shown, the propulsion auxiliary component includes a first clamping rod 41 and a first spring 42. One end of the first clamping rod 41 is rotatably connected to the tie plate 45, and the other end of the first clamping rod 41 frictionally contacts the outer circumferential surface of the receiving end 33, and the friction contact end of the first clamping rod 41 is arranged close to the first sealing plate 43. The side of the first clamping rod 41 is fixedly connected with the first spring 42, and the other end of the first spring 42 is fixedly connected to the tie plate 45.

[0043] When the tie plate 45 is tightened, the tie plate 45 squeezes the first clamping rod 41 , so that the clamping end of the first clamping rod 41 squeezes and pushes the receiving end 33 toward the direction close to the plug end 31 .

[0044] Exemplarily, the tie plate 45 is also provided with a reinforcement assembly, which is used to reinforce the thermal insulation structure 3 on the pipe 1. The reinforcement assembly includes a second clamping rod 47 and a second spring 46. One end of the second clamping rod 47 is rotatably connected to the tie plate 45, and the other end of the second clamping rod 47 is frictionally in contact with the outer circumferential surface of the plug-in end 31. The friction-contacting end of the second clamping rod 47 is arranged close to the second sealing plate 44. The side of the second clamping rod 47 is fixedly connected with a second spring 46, and the other end of the second spring 46 is fixedly connected to the tie plate 45. The thermal insulation structure 3 of the plug-in end 31 is clamped and locked on the pipe 1 at multiple points by the second clamping rod 47 in the reinforcement assembly, ensuring that the plug-in end 31 of the thermal insulation structure 3 is fixed on the pipe 1 to prevent loosening.

[0045] It should be noted that when the fire-resistant thermal insulation rock wool pipe is in use, the thermal insulation structure 3 is first sleeved on the pipe 1, and the sleeve opening on the side of the thermal insulation structure 3 (not shown in the figure) is sealed with an aluminum film adhesive. At this time, for the sealing treatment at the position of the axial end of the thermal insulation structure 3, with the help of the reinforcement mechanism 4, the adjacent thermal insulation structures 3 are first placed in the pre-spliced ​​position, and then, through the opening position of the tie plate 45, the tie plate 45 is surrounded on the outside of the splicing position of the thermal insulation structure 3, so that the second sealing plate 44 corresponds to the position of the second sealing groove 441, and the first sealing plate 43 corresponds to the position of the first sealing groove 431. The staff uses the fastening bolts 49 to fasten the opening ends of the tie plate 45 together, and the positions of the second sealing plate 44 and the second sealing groove 441 are relatively fixed. The tie plate 45 is relatively fixed with respect to the plug-in end 31 in the axial direction. At this time, as the fastening bolts 49 are tightened, the tie plate 45 is tightened, and with the help of the interference between the first sealing plate 43 and the first sealing groove 431, and the interference between the inner sealing plate 48 and the inner sealing groove 481, the receiving end 33 is dragged and pushed along the axial direction toward the plug-in end 31, so that the receiving end 33 and the plug-in end 31 are docked to the sealing position to ensure the sealing effect between the two. Moreover, with the help of the propulsion auxiliary component, the receiving end 33 is pushed toward the plug-in end 31. At the same time, with the help of multiple first clamping rods 41 to clamp the receiving end 33 at multiple points, and multiple second clamping rods 47 to clamp the plug-in end 31 at multiple points, the insulation structure 3 is clamped and locked at the splicing position adjacent to the splicing position to prevent it from loosening.

[0046] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A fire-resistant and thermal-insulating rock wool pipe, characterized in that: The invention comprises a heat-insulating structure (3) and a reinforcing mechanism (4), wherein the heat-insulating structure (3) is used to be sleeved on the outside of a pipeline (1) for heat insulation, and the heat-insulating structure (3) comprises a through-tube portion (32), a plug-in end (31) and a receiving end (33), wherein the plug-in end (31) and the receiving end (33) are respectively located at two ends of the through-tube portion (32), and when the plug-in end (31) of one heat-insulating structure (3) and the receiving end (33) of another adjacent heat-insulating structure (3) are plugged together, a reinforcing mechanism (4) is arranged outside the plug-in position of the heat-insulating structure (3), and the reinforcing mechanism (4) is used to move the plug-in end (31) toward the receiving end (33) to a sealing position.

2. A fire-resistant thermal insulation rock wool pipe according to claim 1, characterized in that: The reinforcing mechanism (4) comprises a tie plate (45), a first sealing plate (43) and a second sealing plate (44); the first sealing plate (43) and the second sealing plate (44) are respectively fixedly connected to the tie plate (45) and are respectively located on one side of the tie plate (45) facing the thermal insulation structure (3); a first sealing groove (431) is provided on the receiving end (33) of the thermal insulation structure (3); the first sealing groove (431) has an inclined surface, and the inclined surface is arranged toward the outer end of the receiving end (33); the first sealing plate (43) is arranged corresponding to the first sealing groove (431); a second sealing groove (441) is provided on the plug-in end (31) of the thermal insulation structure (3); and the second sealing plate (44) is arranged corresponding to the second sealing groove (441); When the tie plate (45) is tightened to the reinforcement position, the frictional contact position between the first sealing plate (43) and the inclined surface of the first sealing groove (431) is relatively displaced from the high point position of the inclined surface to the low point position of the inclined surface, and the area between the first sealing plate (43) and the second sealing plate (44) is a sealing area.

3. A fire-resistant thermal insulation rock wool pipe according to claim 2, characterized in that: There are a plurality of first sealing plates (43) and a plurality of second sealing plates (44). When the tie plate (45) is tightened to a reinforcement position, the plurality of first sealing plates (43) are evenly distributed along the circumference of the pipeline (1), and adjacent first sealing plates (43) are sealed and abutted against each other. Also, the plurality of second sealing plates (44) are evenly distributed along the circumference of the pipeline (1), and adjacent second sealing plates (44) are sealed and abutted against each other.

4. The fire-resistant thermal insulation rock wool pipe according to claim 3, characterized in that: The open end of the tie plate (45) is fastened and closed by a fastening bolt (49), wherein the leading and trailing ends of the tie plate (45), the leading and trailing ends of the first sealing plate (43) and the leading and trailing ends of the second sealing plate (44) are respectively provided with sealing gaskets.

5. The fire-resistant and heat-insulating rock wool pipe according to claim 4, characterized in that: An inner sealing plate (48) is arranged on the outer circumferential surface of the plug-in end (31), and an inner sealing groove (481) is opened on the inner circumferential surface of the receiving end (33). The inner sealing groove (481) is arranged corresponding to the inner sealing plate (48), and the inner sealing groove (481) has an inclined surface, and the inclined surface of the inner sealing groove (481) is arranged toward the outer end of the receiving end (33).

6. The fire-resistant thermal insulation rock wool pipe according to claim 5, characterized in that: The surface hardness of the plug end (31) and the surface hardness of the receiving end (33) are respectively greater than the surface hardness of the through-tube portion (32).

7. The fire-resistant thermal insulation rock wool pipe according to claim 6, characterized in that: The tie plate (45) is provided with a propulsion auxiliary component, which is located on a side of the first sealing plate (43) away from the second sealing plate (44), and the propulsion auxiliary component is in frictional contact with the outer circumferential surface of the receiving end (33).

8. The fire-resistant thermal insulation rock wool pipe according to claim 7, characterized in that: The propulsion auxiliary component includes a first clamping rod (41) and a first spring (42), one end of the first clamping rod (41) is rotatably connected to the tie plate (45), the other end of the first clamping rod (41) is frictionally in contact with the outer circumferential surface of the receiving end (33), and the frictional contact end of the first clamping rod (41) is arranged close to the first sealing plate (43), the side of the first clamping rod (41) is fixedly connected to the first spring (42), and the other end of the first spring (42) is fixedly connected to the tie plate (45).

9. The fire-resistant thermal insulation rock wool pipe according to claim 8, characterized in that: The tie plate (45) is also provided with a reinforcement component, which is used to reinforce the thermal insulation structure (3) on the pipe (1). The reinforcement component includes a second clamping rod (47) and a second spring (46). One end of the second clamping rod (47) is rotatably connected to the tie plate (45), and the other end of the second clamping rod (47) is frictionally in contact with the outer circumferential surface of the plug-in end (31), and the friction-contacting end of the second clamping rod (47) is arranged close to the second sealing plate (44). The side of the second clamping rod (47) is fixedly connected to the second spring (46), and the other two ends of the second spring (46) are fixedly connected to the tie plate (45).

10. The fire-resistant thermal insulation rock wool pipe according to claim 9, characterized in that: The thermal insulation structure (3) comprises a flame retardant layer (321), a rock wool core (322), a thermal insulation layer (323) and a protective layer (324); the flame retardant layer (321), the rock wool core (322), the thermal insulation layer (323) and the protective layer (324) are sequentially distributed from inside to outside along the pipe diameter direction of the thermal insulation structure (3).

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