Anti-drooping soft heat preservation structure for overhead steam pipeline
By installing a support frame and rigid support structure on the outer casing of the steam pipe, the problem of sagging of the soft insulation layer was solved, thus achieving long-term stability of the insulation performance of the steam pipe and improving its economic benefits.
Patent Information
- Application Number
- CN202422820335.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-19
AI Technical Summary
Traditional soft insulation structures are prone to sagging under gravity, which leads to a decrease in the insulation performance of steam pipelines, a short service life, increased heat loss, and affects the economic benefits of steam pipeline systems.
A support frame is installed on the outer casing of the steam pipe. The support frame extends through the inner insulation layer to support the cylinder. Flat steel is used to make clamps and support rings, which are connected by pins to form a rigid support structure. Combined with the heat insulation layer and the additional insulation layer, the stability of the soft insulation layer is maintained.
It effectively prevents the soft insulation layer from sagging, maintains the same thickness of the upper and lower insulation layers of the pipeline, extends service life, reduces heat loss, and improves the economic efficiency of the steam pipeline network.
Smart Images
Figure CN223483796U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of steam pipeline technology, specifically to a soft insulation structure for preventing sagging of overhead steam pipelines. Background Technology
[0002] In recent years, due to the implementation of energy conservation and emission reduction policies, centralized heating has been vigorously developed. The continuous expansion of centralized heating scale inevitably leads to a continuous increase in the pipeline transportation distance of steam pipelines, resulting in a continuous increase in the overall heat loss of steam pipelines. Therefore, the thermal insulation performance of steam pipelines has become an important indicator affecting the efficiency of heating network systems. High-temperature glass wool, aluminum silicate wool, magnesium silicate wool, and other soft insulation materials have the characteristics of high temperature resistance, relatively low thermal conductivity, light weight, good vibration resistance, low price, and convenient construction, and are commonly used for thermal insulation of steam pipelines.
[0003] As energy prices gradually rise, the thickness of the economical insulation layer for steam pipelines is continuously increasing. However, due to the poor compressive strength of soft insulation, thicker soft insulation layers are prone to sagging under long-term gravity. This sagging results in a thinner top and thicker bottom layer in the insulation structure, leading to a decrease in the insulation performance of the steam pipeline, increased heat loss, and reduced economic efficiency of the steam pipeline system. Therefore, traditional soft insulation structures suffer from rapid degradation of insulation performance and short service life in steam pipelines. Utility Model Content
[0004] Based on the above description, this application provides a soft insulation structure to prevent sagging of overhead steam pipelines, in order to solve the problem of reduced insulation performance caused by sagging of the soft insulation layer of steam pipelines.
[0005] The technical solution to the above-mentioned technical problems in this application is as follows:
[0006] A soft insulation structure for preventing sagging of an overhead steam pipeline includes: a plurality of support frames spaced apart outside the working pipeline along a first direction, and an inner insulation layer, a cylinder, an outer insulation layer and an outer protective layer sequentially spaced outside the working pipeline along a second direction, wherein a portion of each support frame penetrates the inner insulation layer to support the cylinder, and the cylinder is disposed in contact between the inner insulation layer and the outer insulation layer;
[0007] The first direction is the axial direction of the working pipe, and the second direction is the radial direction of the working pipe.
[0008] In one or more embodiments, each of the support frames includes a clamp, a plurality of pins, and a support ring; the plurality of pins are spaced apart outside the clamp; and a plurality of fixing tubes are provided inside the support ring.
[0009] The clamp is fitted outside the working pipe, and several pins on the clamp penetrate the inner insulation layer; the support ring is fitted on the inner insulation layer, and the end of each pin away from the clamp is located in a corresponding fixed pipe.
[0010] In one or more embodiments, the plurality of pins are evenly spaced on the outside of the clamp and located above the first reference surface;
[0011] The first reference plane is a horizontal plane passing through the axis of the working pipe.
[0012] In one or more embodiments, both the clamp and the support ring are made of flat steel; and / or
[0013] The pin is welded to the clamp.
[0014] In one or more embodiments, a heat insulation layer is further included, which is sleeved between the working pipe and the support frame.
[0015] In one or more embodiments, an additional insulation layer is laid between the cylinder and the outer insulation layer, the additional insulation layer being located above the cylinder.
[0016] In one or more embodiments, the arc length of the additional insulation layer is one-third of the circumference of the cylinder.
[0017] In one or more embodiments, the plurality of support frames are arranged at intervals of 0.8m-1.2m from each other.
[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0019] In the aforementioned overhead steam pipeline anti-sagging soft insulation structure, a support frame is installed outside the working pipeline, and part of the support frame passes through the inner insulation layer to support the cylinder, so that the cylinder is rigidly supported. Under high temperature environment, the overall insulation structure of the soft insulation layer remains basically stable, and the thickness of the upper and lower insulation layers of the pipeline remains basically unchanged. This allows the soft insulation layer to maintain its initial state for a long time, slows down the decline of soft insulation performance, extends the service life of the soft insulation layer, reduces heat loss, saves energy and reduces emissions, and improves the economic benefits of the steam pipeline network. Attached Figure Description
[0020] Figure 1 A schematic diagram of a soft insulation structure for preventing sagging of an overhead steam pipeline provided in this application embodiment;
[0021] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle;
[0022] Figure 3 for Figure 1 Side sectional view of the anti-sagging soft insulation structure for overhead steam pipes;
[0023] Figure 4 for Figure 1 A partial structural diagram of the central support frame;
[0024] Figure 5 This is a schematic diagram of the support ring structure in an embodiment of this application.
[0025] Explanation of reference numerals in the attached figures:
[0026] Support frame 10, clamp 11, pin 12, support ring 13, fixing pipe r;
[0027] Inner insulation layer 20;
[0028] 30mm cylinder;
[0029] External insulation layer 40;
[0030] Outer protective layer 50;
[0031] Insulation layer 60;
[0032] Additional insulation layer 70;
[0033] Working pipe L;
[0034] First direction F1, second direction F2, first reference plane S1. Detailed Implementation
[0035] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.
[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.
[0037] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.
[0038] See Figure 1 , Figure 1 This illustration shows a structural schematic of a flexible insulation structure for preventing sagging of an overhead steam pipeline according to an embodiment of this application. The flexible insulation structure for preventing sagging of an overhead steam pipeline according to an embodiment of this application includes a plurality of support frames 10 spaced apart along a first direction F1 outside a working pipeline L, and an inner insulation layer 20, a cylinder 30, an outer insulation layer 40, and an outer protective layer 50 sequentially spaced outside the working pipeline L along a second direction F2. Each support frame 10 partially penetrates the inner insulation layer 20 to support the cylinder 30, and the cylinder 30 is positioned between the inner insulation layer 20 and the outer insulation layer 40. The first direction F1 is the axial direction of the working pipeline L, and the second direction F2 is the radial direction of the working pipeline L.
[0039] Specifically, the working pipe L is a steam pipe. The support frame 10 refers to the bracket used to support the cylinder 30. The support frame 10 can be made of steel or alloy, depending on the actual situation. The cylinder 30 is made of galvanized iron sheet. Both the inner insulation layer 20 and the outer insulation layer 40 are soft insulation layers. The insulation material can be aluminum silicate needle-punched blanket, high-temperature glass wool, or high-temperature aerogel for thermal insulation. In this embodiment, a high-temperature reflective layer is laid outside each soft insulation layer. The high-temperature reflective layer can be made of fiberglass cloth and aluminum foil wrapped around the soft insulation layer, which can improve the thermal insulation effect.
[0040] In this embodiment, a support frame 10 is installed outside the working pipe L, and part of the support frame 10 passes through the inner insulation layer 20 to support the cylinder 30, so that the cylinder 30 is rigidly supported. Under high temperature environment, the overall insulation structure of the soft insulation layer remains basically stable, and the thickness of the upper and lower insulation layers of the pipe remains basically unchanged. This allows the soft insulation layer to maintain its initial state for a long time, slows down the decline of soft insulation performance, extends the service life of the soft insulation layer, reduces heat loss, saves energy and reduces emissions, and improves the economic benefits of the steam pipeline network.
[0041] Figure 2 It shows Figure 1 A magnified schematic diagram of part A in the middle; Figure 3 It shows Figure 1 Side sectional view of the anti-sagging soft insulation structure for overhead steam pipes; Figure 4 It shows Figure 1 A partial structural diagram of the central support frame; Figure 5 A schematic diagram of the support ring structure in an embodiment of this application is shown.
[0042] See Figures 2 to 5 In some embodiments, each support frame 10 includes a clamp 11, a plurality of pins 12, and a support ring 13; the plurality of pins 12 are spaced apart outside the clamp 11. A plurality of fixing pipes r are provided on the inner side of the support ring 13. The clamp 11 is fitted over the working pipe L, and the plurality of pins 12 on the clamp 11 penetrate the inner insulation layer 20; the support ring 13 is fitted over the inner insulation layer 20, and the end of each pin 12 away from the clamp 11 is located inside a corresponding fixing pipe r.
[0043] Specifically, the clamp 11 comprises an upper and lower half connected by bolts, allowing it to be detachably fitted onto the outside of the working pipe L. Several pins 12 are welded at intervals to the outside of the clamp 11. The support ring 13 comprises two welded half-rings. After installing the clamp 11 with pins 12 on the working pipe L, the inner insulation layer 20 is wrapped around the working pipe L, with the pins 12 passing through the inner insulation layer 20. Then, one half-ring of the support ring 13 is fixed to the corresponding pin 12 via a fixing pipe r. The other half-ring is then welded to the first half-ring, with refractory material placed at the weld to prevent burning of the inner insulation layer 20. Finally, the cylinder 30, outer insulation layer 40, and outer protective layer 50 are wrapped around the inner insulation layer 20 and the support ring 13 to form an insulation structure. The cylinder 30 is supported by the clamp 11 with pins 12 and the support ring 13. The weight of the cylinder 30 itself, the weight of the inner insulation layer 20 and the weight of the outer insulation layer 40 are all supported by the support ring 13 and the clamp 11 with pins 12. The soft insulation layer inside the cylinder 30 operates for a long time in a high-temperature environment. Even if the organic adhesive in the insulation material has evaporated, the soft insulation layer can maintain its shape due to the fine and long fibers of the insulation material, which are interwoven with each other. Under the effective support of the cylinder 30, it can effectively prevent its sagging and deformation, prevent the upper insulation layer of the pipeline from becoming thinner, and keep the thickness of the upper and lower insulation layers of the pipeline basically unchanged.
[0044] Continue reading Figure 3 In some embodiments, a plurality of pins 12 are evenly spaced on the outside of the clamp 11 and located above the first reference surface S1. The first reference surface S1 is a horizontal plane passing through the axis of the working pipe L.
[0045] Specifically, in this embodiment, five pins 12 are evenly spaced on the outside of the clamp 11 and located on the first reference surface S1. That is, a pin 12 is welded to the outside of the upper half of the clamp 11 at 90°, the two sides at 45°, and the two sides at 0°. In this way, the clamp 11 and the upper support cylinder 30 of the support ring 13 support the weight of the lower insulation layer of the working pipe L, so that the upper insulation layer of the working pipe L only bears its own weight. This can greatly reduce the stress on the upper insulation layer of the working pipe L, effectively prevent the soft insulation layer from sagging and collapsing, and has a certain compressive strength.
[0046] In some embodiments, both the clamp 11 and the support ring 13 are made of flat steel. Specifically, when making the clamp 11, 60×5 flat steel can be bent into a semi-circular ring, with ear plates on both sides and bolt holes. Triangular steel plates are welded to the edges of the ear plates for reinforcement, and two semi-circular rings are made to form the clamp 11. Pins 12 are welded to the outer sides of the clamp 11 at the 90° position on the upper half, the 45° positions on both sides, and the 0° positions on both sides.
[0047] When manufacturing the support ring 13, 25×3 flat steel can be bent into a semi-circular ring. Fixing pipes r are welded to the inner sides of the support ring 13 at the 90° position on the upper half, the 45° positions on both sides, and the 0° positions on both sides. The fixing pipes r can be DN10 galvanized short pipes with a length of 20mm. It should be noted that the radius of the clamp 11 and the radius of the support ring 13 can be determined according to the actual situation; this embodiment does not impose any limitations.
[0048] Continue reading Figure 2 In some embodiments, the overhead steam pipe anti-sagging soft insulation structure of this application further includes a heat insulation layer 60, which is sleeved between the working pipe L and the support frame 10. Specifically, a heat insulation layer 60 is wrapped around the working pipe L, and a clamp 11 with a pin 12 welded to it is installed on the heat insulation layer 60. In this way, direct contact between the clamp 11 and the high-temperature steam pipe can be avoided, effectively reducing the operating temperature of the clamp 11, and allowing the clamp 11 and pin 12 to be made of ordinary carbon steel, thus reducing the cost of the soft insulation support structure.
[0049] In some embodiments, the insulation layer 60 is made of insulating materials such as aluminosilicate needled blanket, high-temperature glass wool, or high-temperature aerogel for thermal insulation. Furthermore, a high-temperature resistant reflective layer can be applied to the outside of the insulation layer 60. This high-temperature resistant reflective layer can be made of fiberglass cloth or aluminum foil and wrapped around the insulation layer 60, which can improve the thermal insulation effect.
[0050] Continue reading Figure 2 and Figure 3 In some embodiments, an additional insulation layer 70 is laid between the cylinder 30 and the outer insulation layer 40, and the additional insulation layer 70 is located above the cylinder 30.
[0051] It should be noted that the cylinder 30 is wrapped with an external insulation layer 40 to prevent heat dissipation from the pin 12 and effectively reduce heat loss. The cylinder 30, made of galvanized iron sheet, has a low surface temperature, the adhesive on the external insulation layer 40 does not easily volatilize, and the insulation material has relatively strong elasticity and integrity, making it less prone to sagging. Furthermore, an additional insulation layer 70 with a thickness of 30mm~50mm is first applied to the top of the cylinder 30, with an arc length one-third of the circumference of the cylinder 30. Then, the entire circumference of the cylinder 30 and the additional insulation layer 70 are wrapped with the external insulation layer 40. In this way, even if the insulation material outside the cylinder 30 sinks slightly, its thickness will still meet the design requirements, ensuring the insulation effect.
[0052] Continue reading Figure 1 In some embodiments, the support frames 10 are spaced 0.8m-1.2m apart. Specifically, the support frames 10, spaced apart along the first direction F1 outside the working pipe L, can be spaced 0.8m, 1.0m, or 1.2m apart, depending on the actual situation. This provides uniform support for the cylinder 30 and the soft insulation layer, improving the compressive strength of the soft insulation layer on the entire working pipe L and effectively preventing sagging.
[0053] In a specific embodiment, the installation method of the overhead steam pipeline anti-sagging soft insulation structure is as follows: A layer of insulation 60 is laid on the working pipeline L, and its longitudinal joint position shall not be arranged within 45° on both sides of the vertical center line of the working pipeline L. Hoops 11 with pins 12 are installed outside the insulation layer 60, with a spacing of 1.0m between adjacent hoops 11. Then, an inner insulation layer 20 is wrapped in layers, with pins 12 piercing the inner insulation layer 20. The inner insulation layer 20 has staggered joints within the same layer and overlapping joints between inner and outer layers, with an overlap length of not less than 100mm. The inner insulation layer 20 is tightly bound with stainless steel straps (12×0.5), with a binding spacing of not more than 200mm. Each insulation product is bound at least twice, with one binding within 50mm of each end of the insulation product. After the insulation layer reaches two-thirds of its thickness, align the fixing pipe r on the inner side of the upper half of the support ring 13 with the corresponding pin 12. Insert the pin 12 into the fixing pipe r, and weld the lower and upper parts of the support ring 13 together. Place refractory material at the weld joint to prevent burning of the inner insulation layer 20. Next, wrap a layer of galvanized iron sheet (0.5mm-1.0mm thick) around the inner insulation layer 20 and the support frame 10. Both the longitudinal and circumferential seams are overlapped, with an overlap size of not less than 50mm. The longitudinal and circumferential seams are fixed with pop rivets to form an integral cylinder 30. An expansion joint is provided at the support of the working pipe L in the cylinder 30.
[0054] In this embodiment, the support ring 13 is supported by the pin 12 on the clamp 11. The cylinder 30 is supported by the support ring 13. The lower inner side of the cylinder 30 is in close contact with and supports the lower part of the inner insulation layer 20. The weight of the cylinder 30, the insulation layer 60, and the inner insulation layer 20 are all supported by the support frame 10. The insulation layer 60 between the support frame 10 and the working pipe L only bears its own weight. The support frame 10 has a strong load-bearing capacity, which can effectively prevent the soft insulation layer inside the cylinder 30 from sagging and deforming, keep the thickness of the upper and lower insulation layers of the working pipe L basically unchanged, slow down the decline of the soft insulation performance, and extend the service life of the soft insulation layer.
[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0056] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A soft insulation structure for preventing sagging of overhead steam pipelines, characterized in that, include: A plurality of support frames are spaced out of the working pipe along a first direction, and an inner insulation layer, a cylinder, an outer insulation layer and an outer protective layer are sequentially spaced out of the working pipe along a second direction, wherein a portion of each support frame penetrates the inner insulation layer to support the cylinder, and the cylinder is disposed in contact between the inner insulation layer and the outer insulation layer. The first direction is the axial direction of the working pipe, and the second direction is the radial direction of the working pipe.
2. The anti-sagging soft insulation structure for overhead steam pipelines according to claim 1, characterized in that, Each of the aforementioned support frames includes a clamp, a plurality of pins, and a support ring; the plurality of pins are spaced apart outside the clamp; and a plurality of fixing tubes are provided inside the support ring. The clamp is fitted outside the working pipe, and several pins on the clamp penetrate the inner insulation layer; the support ring is fitted on the inner insulation layer, and the end of each pin away from the clamp is located in a corresponding fixed pipe.
3. The anti-sagging soft insulation structure for overhead steam pipelines according to claim 2, characterized in that, The plurality of pins are evenly spaced and arranged on the outside of the clamp and located above the first reference surface; The first reference plane is a horizontal plane passing through the axis of the working pipe.
4. The anti-sagging soft insulation structure for overhead steam pipelines according to claim 2, characterized in that, Both the clamp and the support ring are made of flat steel; and / or The pin is welded to the clamp.
5. The anti-sagging soft insulation structure for overhead steam pipelines according to any one of claims 1-4, characterized in that, It also includes a heat insulation layer, which is fitted between the working pipe and the support frame.
6. The anti-sagging soft insulation structure for overhead steam pipelines according to any one of claims 1-4, characterized in that, An additional insulation layer is laid between the cylinder and the outer insulation layer, and the additional insulation layer is located above the cylinder.
7. The anti-sagging soft insulation structure for overhead steam pipelines according to claim 6, characterized in that, The arc length of the additional insulation layer is one-third of the circumference of the cylinder.
8. The anti-sagging soft insulation structure for overhead steam pipelines according to any one of claims 1-4, characterized in that, The support frames are spaced 0.8m-1.2m apart from each other.