Adjustable large-diameter pipeline heat treatment internal insulation device

Abstract

The utility model relates to large -diameter pipeline heat treatment heat preservation device technical field discloses an adjustable large -diameter pipeline heat treatment internal heat preservation device, including base, the base upper surface fixedly connected with support, support side wall fixedly connected with fixed plate, fixed plate side wall is provided with heat preservation subassembly, the inside fixed plate is provided with adjusting assembly, adjusting assembly includes rotary disc and expansion plate, the rotary disc is located in the inside fixed plate, expansion plate side wall slidingly connects in the inside fixed plate, the support upper surface fixedly connected with mounting cover. In the utility model, through motor drive worm, worm gear drive, cooperation rotary disc and expansion plate's sliding fit, make multiple expansion plates under the restraint of fixed plate and connecting rod synchronous expansion, to reach the effect that the heat preservation block fast adaptation different caliber pipeline and even adhere, improve the heat preservation device's adaptation flexibility and sealing reliability to the caliber of pipeline through the above structure.

Description

Technical Field

[0001] This utility model relates to the technical field of heat treatment insulation devices for large-diameter pipelines, and in particular to an adjustable internal heat treatment insulation device for large-diameter pipelines. Background Technology

[0002] Large-diameter pipelines (typically referring to pipelines with a diameter ≥ DN500) are widely used in fields such as petrochemicals, power engineering, and municipal construction. These pipelines require post-weld heat treatment after welding to eliminate residual welding stress, improve joint performance, and ensure long-term safe operation. Internal insulation is crucial for ensuring temperature uniformity and reducing heat loss during pipeline heat treatment. Therefore, an internal insulation device that can adapt to pipelines of different diameters and achieve a tight fit has become an industry necessity. Such devices need to create a closed insulation space inside the pipeline, working in conjunction with external heating equipment to precisely control the heating, temperature control, and cooling rates, meeting the stringent requirements of heat treatment processes for temperature field stability.

[0003] In existing technologies, internal insulation for large-diameter pipeline heat treatment often employs a "segmented rigid frame + fixed insulation layer" structure. The technical principle is as follows: a pre-sized metal frame supports the insulation layer. The frame is composed of multiple detachable metal rods, and the length of the rods is changed according to the pipeline diameter to ensure the insulation layer fits closely to the inner wall of the pipeline. Some devices add a spring assembly between the frame and the insulation layer, using the spring's preload to compensate for minor dimensional deviations and improve fit. Additionally, there are devices using a manually adjustable screw mechanism, where manually rotating the screw causes localized expansion and contraction of the insulation layer to accommodate slight changes in the pipeline's inner diameter.

[0004] However, in existing technologies, due to the lack of a unified driving and constraint mechanism for each adjustment unit, there are often significant differences in synchronization between manual adjustment and the expansion and contraction of segmented frames. For example, when the pipe diameter changes significantly, the expansion and contraction of the insulation layer at different locations are inconsistent. Some areas experience excessive compression leading to insulation layer damage, while other areas suffer from insufficient expansion and contraction, resulting in obvious gaps. This asynchronous adjustment problem directly causes local heat loss through the gaps in the pipe, severely affecting the uniformity of the heat treatment temperature and failing to meet the insulation accuracy requirements of large-diameter pipes. Therefore, an adjustable internal insulation device for heat treatment of large-diameter pipes is proposed to solve the above problems. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides an adjustable internal insulation device for heat treatment of large-diameter pipes, which aims to improve the problem of local gap heat leakage caused by asynchronous adjustment in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable internal insulation device for heat treatment of large-diameter pipes includes a base, a bracket fixedly connected to the upper surface of the base, a fixing plate fixedly connected to the side wall of the bracket, an insulation component provided on the side wall of the fixing plate, and an adjustment component provided inside the fixing plate. The adjustment assembly includes a rotating disk and a telescopic plate. The rotating disk is located inside the fixed plate. The side wall of the telescopic plate is slidably connected to the inside of the fixed plate. A mounting cover is fixedly connected to the upper surface of the bracket. A rotating rod is rotatably connected inside the mounting cover. The rotating disk is fixedly connected to the side wall of the rotating rod. A worm gear is rotatably connected inside the mounting cover. A motor is fixedly connected to the side wall of the mounting cover. The output end of the motor is fixedly connected to one end of the worm gear. A worm wheel is fixedly connected to the side wall of the rotating rod. A fixing block is fixedly connected to the side wall of the telescopic plate.

[0007] As a further description of the above technical solution: The insulation component includes insulation blocks, the sidewalls of which are fixedly connected to the sidewalls of the telescopic plate. There are multiple insulation blocks arranged in a ring on the outside of the fixed plate.

[0008] As a further description of the above technical solution: The worm gear meshes with the worm wheel, the side wall of the rotating rod is rotatably connected inside the fixed plate, the side wall of the fixed block is slidably connected inside the rotating disk, and a connecting rod is fixedly connected between the fixed plates.

[0009] As a further description of the above technical solution: An elastic band is fixedly connected between the insulation blocks, and an elastic band is fixedly connected between the fixing plate and the insulation blocks. Both the elastic band one and the elastic band two are made of composite polyester canvas to improve their sealing performance.

[0010] As a further description of the above technical solution: The insulation block has an outer layer inside, which is made of glass fiber reinforced plastic to provide a rigid support surface and ensure that the thrust of the telescopic plate can be evenly transmitted to the entire annular module.

[0011] As a further description of the above technical solution: The outer sidewall is provided with a transition layer, which is made of a composite layer of open-cell silicone rubber sponge and basalt fiber cloth, and is used to absorb the impact stress when the telescopic plate expands or contracts rapidly.

[0012] As a further description of the above technical solution: The transition layer is provided with an insulation layer on its sidewall. The insulation layer is made of gradient density composite insulation cotton and is used to reduce heat convection loss through the gradient structure.

[0013] As a further description of the above technical solution: The insulation layer has an adhesive layer on its sidewall. The adhesive layer is made of high-compression, resilient ceramic fiber cotton and is used to compensate for minor unevenness in the inner wall of the pipe to ensure the bonding gap.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the worm gear and worm wheel drive are driven by a motor, and the sliding cooperation between the rotating disk and the telescopic plate allows multiple telescopic plates to extend and retract synchronously under the constraint of the fixed plate and the connecting rod. This achieves the effect of the insulation block quickly adapting to pipes of different diameters and fitting evenly, solving the problem of local gap heat leakage caused by asynchronous adjustment in existing devices. The above structure improves the flexibility of the insulation device in adapting to pipe diameters and the reliability of sealing.

[0015] 2. In this utility model, through the multi-layer structure of the insulation block, the synergistic effect of the insulation layer, the transition layer, the outer layer and the elastic band one and elastic band two, the insulation block can not only fit tightly against the inner wall of the pipe, but also efficiently lock in heat, thereby achieving the effect of adapting to the irregularity of the pipe and strengthening the insulation and sealing. It solves the problem of excessive heat loss caused by poor fit or easy damage to the insulation layer in the existing device. The above structure improves the insulation efficiency and stability of the pipe during heat treatment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of an adjustable internal heat insulation device for heat treatment of large-diameter pipes proposed in this utility model. Figure 2 This is a schematic diagram of the internal structure of the mounting cover of an adjustable large-diameter pipe heat treatment internal insulation device proposed in this utility model. Figure 3 This is a schematic diagram of the structure of the fixing plate of the adjustable large-diameter pipe heat treatment internal insulation device proposed in this utility model. Figure 4 This is an exploded view of the internal insulation device for heat treatment of adjustable large-diameter pipes proposed in this utility model. Figure 5 This is a schematic diagram of the insulation component of an adjustable large-diameter pipe heat treatment internal insulation device proposed in this utility model.

[0017] Legend: 1. Base; 2. Bracket; 3. Fixing plate; 4. Insulation block; 5. Elastic band one; 6. Mounting cover; 7. Motor; 8. Worm gear; 9. Worm wheel; 10. Rotating rod; 11. Rotating disk; 12. Fixing block; 13. Telescopic plate; 14. Connecting rod; 15. Elastic band two; 16. Outer layer; 17. Transition layer; 18. Insulation layer; 19. Adhesive layer. Detailed Implementation

[0018] 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.

[0019] Reference Figures 1-4 The present invention provides an embodiment of an adjustable large-diameter pipe heat treatment internal insulation device, including a base 1, which is used to support the overall weight of the device and provide a stable support effect. A bracket 2 is fixedly connected to the upper surface of the base 1, and a fixing plate 3 is fixedly connected to the side wall of the bracket 2. An insulation component is provided on the side wall of the fixing plate 3. The insulation component is used to realize the insulation and sealing function inside the pipe. An adjustment component is provided inside the fixing plate 3. The adjustment component is used to drive the insulation component to extend and retract, so as to achieve the adaptation effect for pipes of different diameters. The adjustment assembly includes a rotating disk 11 and a telescopic plate 13. The rotating disk 11 is located inside the fixed plate 3 and is used to push the telescopic plate 13 to move radially through rotation, thereby achieving the telescopic adjustment effect of the telescopic plate 13. The side wall of the telescopic plate 13 is slidably connected inside the fixed plate 3. The telescopic plate 13 is used to connect the adjustment assembly and the insulation assembly, transmit driving force, and drive the insulation assembly to move synchronously, ensuring the insulation assembly fits snugly against the inner wall of the pipe. A mounting cover 6 is fixedly connected to the upper surface of the bracket 2. A rotating rod 10 is rotatably connected inside the mounting cover 6. The rotating disk 11 is fixedly connected to the side wall of the rotating rod 10. A worm gear 8 is rotatably connected inside the mounting cover 6. A motor 7 is fixedly connected to the side wall of the mounting cover 6. The motor 7 is used to provide power output and drive the overall movement of the adjustment assembly. The output end of the motor 7 is fixedly connected to one end of the worm gear 8. A worm wheel 9 is fixedly connected to the side wall of the rotating rod 10. The worm wheel 9 is used to cooperate with the worm gear 8 to achieve speed reduction transmission and increase the output torque. A fixing block 12 is fixedly connected to the side wall of the telescopic plate 13. The worm gear 8 and the worm wheel are also fixedly connected. Nine-phase meshing ensures that the telescopic plate 13 has sufficient thrust to push the insulation component to fit against the inner wall of the pipe. The side wall of the rotating rod 10 is rotatably connected to the inside of the fixed plate 3. The rotating rod 10 and the fixed plate 3 rotate to achieve the effect of stably supporting the rotating disk 11. The side wall of the fixed block 12 is slidably connected to the inside of the rotating disk 11. The fixed block 12 and the rotating disk 11 slide to achieve the effect of converting the rotational motion of the rotating disk 11 into the radial telescopic motion of the telescopic plate 13. The fixed plates 3 are fixedly connected by a connecting rod 14. The connecting rod 14 is used to connect multiple fixed plates 3 to form an overall frame structure, ensuring that each fixed plate 3 moves synchronously and improving the overall stability of the adjustment component. The above components are combined and powered by the motor 7. After being reduced and transmitted by the worm gear 8 and worm wheel 9, the rotating rod 10 drives the rotating disk 11 to rotate. Then, the radial telescopic motion is achieved through the cooperation of the fixed block 12 and the telescopic plate 13. With the synchronous constraint of the connecting rod 14, the insulation component can quickly adapt to pipes of different diameters and fit evenly. Reference Figure 2 and Figure 5The insulation component includes insulation blocks 4, whose sidewalls are fixedly connected to the sidewalls of the telescopic plate 13. Multiple insulation blocks 4 are arranged in a ring around the outside of the fixed plate 3. Elastic bands 1-5 are fixedly connected between the insulation blocks 4. Elastic bands 1-5 stretch or contract in conjunction with the telescopic movement of the insulation blocks 4, effectively filling the gaps between adjacent insulation blocks 4. Elastic band 2-15 is fixedly connected between the fixed plate 3 and the insulation blocks 4. Elastic band 2-15 deforms in conjunction with the movement of the telescopic plate 13, effectively sealing the gaps between the fixed plate 3 and the insulation blocks 4. Both elastic bands 1-5 and 2-15 are made of composite polyester canvas to improve their sealing performance. An outer layer 16 is provided inside the insulation block 4. The outer layer 16 is made of glass fiber reinforced plastic to provide a rigid support surface, ensuring that the thrust of the telescopic plate 13 is evenly transmitted to the entire ring module. A transition layer 17 is provided on the sidewall of the outer layer 16. The transition layer 17 is made of a composite layer of open-cell silicone rubber sponge and basalt fiber cloth. It is used to absorb the impact stress when the expansion plate 13 expands or contracts rapidly, and to prevent the insulation layer 18 from cracking due to rigid impact. The side wall of the transition layer 17 is provided with the insulation layer 18, which is made of gradient density composite insulation cotton. It is used to reduce heat convection loss through gradient structure and improve the overall insulation efficiency. The side wall of the insulation layer 18 is provided with the bonding layer 19, which is made of high compression resilience ceramic fiber cotton. It is used to compensate for the small unevenness of the inner wall of the pipe and ensure that the bonding gap is ≤1mm. Multiple insulation blocks 4 are connected into a whole by elastic band 1 5 and elastic band 2 15. With the layered structure of the outer layer 16, transition layer 17, insulation layer 18 and bonding layer 19, it can achieve the effect of tightly fitting the inner wall of the pipe under the drive of the expansion plate 13 and effectively blocking heat transfer. It realizes the adaptive insulation and sealing of pipes with different diameters.

[0020] Working principle: When using this equipment, first move it into the pipeline, then start the motor 7. The output end of the motor 7 drives the worm 8 to rotate inside the mounting cover 6. Since the worm 8 meshes with the worm wheel 9, the rotational motion of the worm 8 is converted into the axial rotation of the worm wheel 9, which in turn drives the rotating rod 10 fixed inside the worm wheel 9 to rotate synchronously. The rotating disk 11 fixed to the side wall of the rotating rod 10 rotates with it. The sliding groove inside the rotating disk 11 forms a sliding fit with the fixed block 12 on the telescopic plate 13. When the rotating disk 11 rotates... When rotating, the fixed block 12 slides radially along the groove, pushing the telescopic plate 13 to extend outward along the slide rail inside the fixed plate 3 to fit large-diameter pipes or to retract inward to fit small-diameter pipes. Multiple telescopic plates 13 are connected as a whole by the fixed plate 3 and the connecting rod 14 to ensure that all telescopic plates 13 extend and retract synchronously when the rotating disk 11 rotates, avoiding uneven fitting caused by the misalignment of a single insulation block 4. When the telescopic plate 13 extends outward, it drives the insulation block 4 fixed on the side wall to move radially synchronously until the bonding layer 19 of the insulation block 4 is in contact with the pipe. The inner wall contact layer 19 uses high-compression resilience ceramic fiber cotton, which can compensate for the slight unevenness of the inner wall of the pipe through its own deformation compression rate, ensuring a proper fit. The insulation layer 18 uses gradient density composite insulation cotton, which blocks heat conduction through its porous structure, reducing heat diffusion to the outside. The transition layer 17 has an open-cell silicone rubber sponge and basalt fiber cloth composite structure, which absorbs the impact stress during the expansion and contraction of the expansion plate 13, preventing the insulation layer 18 from cracking due to rigid impact. The outer layer 16 provides rigidity. The elastic support evenly transmits the thrust of the telescopic plate 13 to the entire insulation block 4, ensuring that the multiple insulation blocks 4 arranged in a ring form a continuous contact surface. The elastic band 5 between the insulation blocks 4 is made of composite polyester canvas and stretches synchronously with the expansion of the insulation block 4. It uses its own elastic stretching to fill the splice seam of adjacent insulation blocks 4 and prevent heat from leaking from the gap. The elastic band 2 15 between the fixing plate 3 and the insulation block 4 is made of the same material and seals the connection gap between the insulation block 4 and the adjustment component, forming a double protection of inner ring contact and sealing plus outer ring elastic compensation.

[0021] 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 adjustable internal insulation device for heat treatment of large-diameter pipes, comprising a base (1), characterized in that: A bracket (2) is fixedly connected to the upper surface of the base (1), a fixing plate (3) is fixedly connected to the side wall of the bracket (2), a heat insulation component is provided on the side wall of the fixing plate (3), and an adjustment component is provided inside the fixing plate (3). The adjustment assembly includes a rotating disk (11) and a telescopic plate (13). The rotating disk (11) is located inside the fixed plate (3). The side wall of the telescopic plate (13) is slidably connected inside the fixed plate (3). A mounting cover (6) is fixedly connected to the upper surface of the bracket (2). A rotating rod (10) is rotatably connected inside the mounting cover (6). The rotating disk (11) is fixedly connected to the side wall of the rotating rod (10). A worm gear (8) is rotatably connected inside the mounting cover (6). A motor (7) is fixedly connected to the side wall of the mounting cover (6). The output end of the motor (7) is fixedly connected to one end of the worm gear (8). A worm wheel (9) is fixedly connected to the side wall of the rotating rod (10). A fixing block (12) is fixedly connected to the side wall of the telescopic plate (13).

2. The adjustable large-diameter pipe heat treatment internal insulation device according to claim 1, characterized in that: The insulation component includes insulation blocks (4), the sidewalls of which are fixedly connected to the sidewalls of the telescopic plate (13). There are multiple insulation blocks (4) arranged in a ring on the outside of the fixed plate (3).

3. The adjustable large-diameter pipe heat treatment internal insulation device according to claim 1, characterized in that: The worm (8) meshes with the worm wheel (9), the side wall of the rotating rod (10) is rotatably connected inside the fixed plate (3), the side wall of the fixed block (12) is slidably connected inside the rotating disk (11), and a connecting rod (14) is fixedly connected between the fixed plates (3).

4. The adjustable large-diameter pipe heat treatment internal insulation device according to claim 2, characterized in that: The insulation blocks (4) are fixedly connected by an elastic band one (5), and the fixed plate (3) is fixedly connected to the insulation blocks (4) by an elastic band two (15). Both the elastic band one (5) and the elastic band two (15) are made of composite polyester canvas to improve their sealing performance.

5. An adjustable large-diameter pipe heat treatment internal insulation device according to claim 2, characterized in that: The insulation block (4) has an outer layer (16) inside. The outer layer (16) is made of glass fiber reinforced plastic and is used to provide a rigid support surface to ensure that the thrust of the telescopic plate (13) can be evenly transmitted to the entire annular module.

6. An adjustable large-diameter pipe heat treatment internal insulation device according to claim 5, characterized in that: The outer layer (16) has a transition layer (17) on its sidewall. The transition layer (17) is made of a composite layer of open-cell silicone rubber sponge and basalt fiber cloth, which is used to absorb the impact stress when the telescopic plate (13) expands or contracts rapidly.

7. An adjustable large-diameter pipe heat treatment internal insulation device according to claim 6, characterized in that: The transition layer (17) has a heat insulation layer (18) on its sidewall. The heat insulation layer (18) is made of gradient density composite heat insulation cotton and is used to reduce heat convection loss through gradient structure.

8. An adjustable large-diameter pipe heat treatment internal insulation device according to claim 7, characterized in that: The insulation layer (18) has an adhesive layer (19) on its side wall. The adhesive layer (19) is made of high-compression elastic ceramic fiber cotton to compensate for the small unevenness of the inner wall of the pipe and ensure the fitting gap.

Images