Super-thick thermal insulation layer fixing structure for pipeline and construction method

Abstract

The invention belongs to the field of pipeline heat preservation, and particularly relates to an ultra-thick heat preservation layer fixing structure for a pipeline and a construction method.The ultra-thick heat preservation layer fixing structure for the pipeline comprises the pipeline, hoop devices which are evenly distributed are fixedly installed on the outer wall of the pipeline, each hoop device comprises a hoop, and first pull rods which are distributed circumferentially and diverge outwards in the radial direction are connected to the outer walls of the hoops; a bearing arc plate device is connected to the two axially adjacent first pull rods in a sliding mode, the bearing arc plate device is fixed to the first pull rods in a limited mode through locking nuts, second pull rods facing outwards in the radial direction are arranged in the middle of the bearing arc plate device, and a bearing straight plate device is connected to the two axially adjacent second pull rods in a sliding mode. According to the device, the first pull rod, the bearing arc plate device, the second pull rod and the bearing straight plate device are arranged, so that the stress uniformity during fixed installation of a heat preservation layer is improved, the conditions that an expansion joint of the heat preservation layer is separated and sunken, the upper portion of the expansion joint is compacted and thinned, and the lower portion of the expansion joint is hollow are effectively avoided, and the heat preservation effect is improved.

Description

Technical Field

[0001] The present invention belongs to the field of pipeline heat preservation, and particularly relates to an ultra-thick heat preservation layer fixing structure for pipelines and a construction method thereof. Background Art

[0002] With the rapid development of the national economy and the stringent environmental protection requirements, high-temperature equipment and pipelines are necessary in the chemical production processes such as coal chemical industry, coal-to-methanol, coal-to-natural gas, coal-to-oil, and sulfuric acid processes. Moreover, in recent years, due to the implementation of energy conservation and emission reduction policies, central heating has been vigorously developed. The continuous expansion of the central heating scale will inevitably lead to the continuous increase in the pipeline transportation distance of the heat supply network, the continuous increase in the overall heat loss of the heat pipelines, and the heat insulation performance of the heat pipelines has become an important indicator affecting the efficiency of the heat supply network system. Soft heat preservation materials such as glass fiber, asbestos, rock wool, silicate, aluminum silicate needle punched blanket, hydrophobic composite silicate (magnesium aluminum silicate) glass wool, and rock wool heat preservation blanket have the characteristics of high temperature resistance, relatively low thermal conductivity, light weight, good anti-vibration performance, low price, and convenient construction, and are commonly used for the heat insulation of heat pipelines. In order to reduce heat loss, the thickness of the heat preservation layer of the heat pipelines is continuously increased, and some reach 500 - 600 mm or even thicker.

[0003] The existing heat preservation layer installation structures usually adopt hook nails, and the positions of the hook nails are generally arranged at the joints of the heat preservation layer; or according to the thickness of the heat preservation layer and the outer diameters of the equipment and pipelines, a layer of heat preservation material is wound, and then it is fixed on the outer walls of the equipment and pipelines to be heat-preserved with iron wires, and then the construction of the second heat preservation layer is completed around the equipment and pipelines. After successive layer-by-layer construction until the thickness of the heat preservation layer is reached, finally the construction of the outer protective layer is carried out to form a heat preservation structure layer. However, due to the poor compressive capacity and easy deformation of the soft heat preservation layer, the above installation methods all have the problems of uneven stress and insufficient positioning of the heat preservation layer, and there will be a situation where the soft heat preservation layer sags and deforms, resulting in the upper part of the heat preservation structure layer being compacted and thinned, and the lower part being hollow with the equipment or pipeline, and even causing suspension, leading to a decrease in the heat preservation performance of the heat pipelines, an increase in heat loss, and a reduction in the economic benefits of the heat pipeline system. Summary of the Invention

[0004] The purpose of the present invention is to provide an ultra-thick heat preservation layer fixing structure for pipelines and a construction method thereof in view of the deficiencies of the prior art. By adopting a new heat preservation layer fixing structure, it can effectively avoid the situations of the expansion joints of the heat preservation layer of the heat preservation equipment or pipelines breaking away, sagging, the upper part being compacted and thinned while the lower part being hollow, and even the lower part being suspended, and ensure the heat transfer efficiency of the pipelines, thereby effectively solving the problems existing in the prior art.

[0005] To achieve the above purpose, the specific technical solutions of the present invention are as follows: An ultra-thick insulation layer fixing structure and construction method for pipelines, including a pipeline, wherein evenly distributed hoop devices are fixedly installed on the outer wall of the pipeline. The hoop device includes a hoop, and radially outwardly diverging first tie rods distributed circumferentially are connected to the outer wall of the hoop. A supporting arc plate device is slidably connected to two axially adjacent first tie rods, and the supporting arc plate device is limited and fixed on the first tie rod by a locking nut. A radially outward second tie rod is arranged at the middle of the supporting arc plate device, and a supporting straight plate device is slidably connected to two axially adjacent second tie rods, and the supporting straight plate device is limited and fixed on the second tie rod by a locking nut.

[0006] As a further setting of the above solution, when welding is allowed on the outer wall of the pipeline, the bottom end of the first tie rod is directly fixedly installed on the outer wall of the pipeline, and the first tie rods are distributed circumferentially and diverge radially outward along the pipeline.

[0007] As a further setting of the above solution, the hoop is an arc-shaped circular ring strip, and locking pieces are symmetrically arranged at both ends of the hoop. A locking bolt is screwed between the two locking pieces. Mounting platforms distributed circumferentially are arranged on the outer wall of the hoop, and the bottom end of the first tie rod is detachably connected to the mounting platform. The hoop surrounds the outer wall of the pipeline, and the hoop is fixedly installed on the outer wall of the pipeline through the locking bolt and the locking piece.

[0008] As a further setting of the above solution, mounting threads are arranged on the outer wall near the top end of the first tie rod, and a locking nut is screwed on the mounting thread. Mounting threads are opened on the outer wall near both ends of the second tie rod, and a locking nut is screwed on the mounting thread near the top end of the second tie rod.

[0009] As a further setting of the above solution, the supporting arc plate device includes a supporting arc plate. An internally threaded connection platform with an opening radially outward is arranged at the center of the supporting arc plate. The internally threaded connection platform is threadedly connected to the second tie rod. Through holes are symmetrically opened on both sides of the internally threaded connection platform in the axial direction, and the through holes are slidably connected to the first tie rod. First wing-shaped pressing plates are symmetrically and fixedly installed on the supporting arc plate on both sides of the through hole, and the first wing-shaped pressing plates and the supporting arc plate have the same central axis.

[0010] As a further setting of the above solution, the supporting straight plate device includes a supporting straight plate. Mounting arc plates are fixedly connected to both ends of the supporting straight plate. A second through hole radially penetrating is arranged at the center of the mounting arc plate, and the second through hole is slidably connected to the second tie rod. Second wing-shaped pressing plates are symmetrically and fixedly installed on the mounting arc plate on both sides of the second through hole, and the second wing-shaped pressing plates and the mounting arc plate have the same central axis.

[0011] As a further setting of the above solution, an outer protective layer is arranged outside the supporting straight plate device. The outer protective layer is spliced into a cylindrical shape by rivets, covering the entire installation structure and the insulation layer to play a protective role.

[0012] The present invention also discloses a construction and installation method using the above-mentioned ultra-thick insulation layer fixing structure, which includes the following steps: First step, first process the first tie rod, the supporting arc plate device, the second tie rod and the supporting straight plate device according to the outer diameter of the insulation equipment or pipeline and the required insulation thickness. The first tie rod is generally processed to the length of the thickness of two layers of insulation materials. When the pipeline allows welding, directly weld and fix the bottom end of the first tie rod on the outer wall of the pipeline; when the pipeline does not allow direct welding, surround the outer wall of the pipeline with a hoop, and adjust the distance between the hoops as required through the locking bolts and locking pieces, and fix the hoop on the outer wall of the pipeline, and fix the first tie rod on the installation platform. At this time, an installation space is formed; Second step, lay the first layer of insulation layer. The first tie rod is located at the splicing joint of the insulation layer or installation holes and grooves are processed on the insulation layer to facilitate wrapping the first insulation layer on the outer wall of the pipeline as required; Third step, after the first layer of insulation layer is laid, assemble the supporting arc plate device on two adjacent first tie rods axially on the pipeline, screw a locking nut on the top end of the first tie rod, and screw down the locking nut to force the supporting arc plate device to translate towards the bottom end of the first tie rod to compact and fix the first layer of insulation layer; Fourth step, screw and fix the second tie rod on the internal thread connection platform, lay the second layer of insulation layer, and wrap the second layer of insulation layer on the outside of the supporting arc plate device and the first layer of insulation layer as required. The splicing seams of the second layer of insulation layer and the first layer of insulation layer are arranged staggeredly; Fifth step, after the second layer of insulation layer is laid, assemble the supporting straight plate device on two adjacent second tie rods axially on the pipeline, screw a locking nut on the top end of the second tie rod, and screw down the locking nut to force the supporting straight plate device to translate towards the bottom end of the second tie rod to compact and fix the second layer of insulation layer; Sixth step, use rivets to piece together the outer protective layer into a cylindrical shape, and at the same time tightly wrap the entire installation structure and the outside of the insulation layer to protect the insulation layer.

[0013] Advantages of the present invention: By setting the first tie rod, the supporting arc plate device, the second tie rod and the supporting straight plate device, an installation space for laying the insulation layer is formed on the outside of the pipeline. The insulation layer is laid in sequence, and the supporting arc plate device and the supporting straight plate device cooperate with the locking nut to compact and fix the insulation layer. At the same time, the first wing-shaped pressing plate provided on the supporting arc plate and the second wing-shaped pressing plate provided on the supporting straight plate device gradually fit with the insulation layer during the compaction and fixing process, further improving the uniformity of the force on the insulation layer, effectively avoiding the situations of the expansion joint of the insulation layer breaking away, subsiding, the upper part being compacted and thinned, the lower part being hollow or even the lower part being suspended, enhancing the insulation effect and improving the heat transfer efficiency.

[0014] The first pull rod and the second pull rod can also effectively reduce the axial and axial movement of the thermal insulation layer on the outer wall of the pipeline, further improving the fixed installation effect of the thermal insulation layer. Description of the Drawings

[0015] Figure 1 It is a schematic cross-sectional view A of the present invention; Figure 2 It is a side view of the present invention; Figure 3 It is an assembled axonometric schematic view of the present invention; Figure 4 It is a schematic view of the hoop device of the present invention; Figure 5 It is an assembled schematic view of the supporting arc plate device and the supporting straight plate device of the present invention; Figure 6 It is a schematic view of the first pull rod and the second pull rod of the present invention; Figure 7 It is a schematic view of the supporting arc plate device of the present invention; Figure 8 It is a schematic view of the supporting straight plate device of the present invention.

[0016] Pipeline; 2, Hoop device; 3, First pull rod; 4, Supporting arc plate device; 5, Second pull rod; 6, Supporting straight plate device; 7, Locking nut; 8, Outer protective layer; 201, Hoop; 202, Installation platform; 203, Locking piece; 204, Locking bolt; 301, Installation thread; 401, Supporting arc plate; 402, Internal thread connection platform; 403, First through hole; 404, First wing-shaped pressing plate; 601, Supporting straight plate; 602, Installation arc plate; 6021, Second through hole; 603, Second wing-shaped pressing plate; 801, Rivet. Detailed Embodiments

[0017] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0018] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The following will refer to the attached Figures 1 to 8 and describe the present application in detail in conjunction with the embodiments. Embodiment 1

[0019] Embodiment 1 discloses a fixing structure for an ultra-thick insulation layer for a pipeline, including a pipeline 1. Uniformly distributed hoop devices 2 are fixedly installed on the outer wall of the pipeline 1. The hoop device 2 includes a hoop 201. Radially outwardly divergent first tie rods 3 distributed circumferentially are connected to the outer wall of the hoop 201. A supporting arc plate device 4 is slidably connected to two axially adjacent first tie rods 3. The supporting arc plate device 4 is limited and fixed on the first tie rod 3 by a locking nut 7. A second tie rod 5 radially outward is provided at the middle of the supporting arc plate device 4. A supporting straight plate device 6 is slidably connected to two axially adjacent second tie rods 5. The supporting straight plate device 6 is limited and fixed on the second tie rod 5 by a locking nut 7. When welding is allowed on the outer wall of the pipeline 1, the bottom end of the first tie rod 3 is directly fixedly installed on the outer wall of the pipeline 1, and the first tie rods 3 distributed circumferentially diverge radially outward along the pipeline.

[0020] The hoop 201 is an arc-shaped circular ring strip. Locking pieces 203 are symmetrically provided at both ends of the hoop 201. A locking bolt 204 is screwed between the two locking pieces 203. Mounting platforms 202 distributed circumferentially are provided on the outer wall of the hoop 201. The mounting platforms 202 are detachably connected to the bottom end of the first tie rod 3. The hoop 201 surrounds the outer wall of the pipeline 1, and the hoop 201 is fixedly installed on the outer wall of the pipeline 1 through the locking bolt 204 and the locking pieces 203. Mounting threads 301 are provided on the outer wall near the top end of the first tie rod 3. A locking nut 7 is screwed on the mounting threads 301. Mounting threads 301 are formed on the outer wall near both ends of the second tie rod 5. A locking nut 7 is screwed on the mounting thread near the top end of the second tie rod 5.

[0021] The supporting arc plate device 4 includes a supporting arc plate 401. An internally threaded connection platform 402 with an opening radially outward is provided at the center of the supporting arc plate 401. The internally threaded connection platform 402 is threadedly connected to the second tie rod 5. Through first through holes 403 are symmetrically formed on both axial sides of the internally threaded connection platform 402. The first through holes 403 are slidably connected to the first tie rod 3. First wing-shaped pressing plates 404 are symmetrically and fixedly installed on the supporting arc plate 401 on both sides of the first through holes 403. The first wing-shaped pressing plates 404 and the supporting arc plate 401 have the same central axis. When the supporting arc plate 401 fits against the outer side of the insulation layer, the first wing-shaped pressing plates 404 are automatically deformed under pressure to fit against the insulation layer, ensuring uniform force on the insulation layer and avoiding the situation of excessive local deformation.

[0022] The supporting straight plate device 6 includes a supporting straight plate 601. At both ends of the supporting straight plate 601, there are fixedly connected mounting arc plates 602. A radially penetrating second through hole 6021 is provided at the center of the mounting arc plate 602. The second through hole 6021 is slidably connected to the second pull rod 5. Symmetrically and fixedly mounted on the mounting arc plate 602 on both sides of the second through hole 6021 are second wing-shaped pressing plates 603. The second wing-shaped pressing plates 603 and the mounting arc plate 602 have the same central axis. When the mounting arc plate 602 fits against the outer side of the thermal insulation layer, the second wing-shaped pressing plates 603 are automatically deformed under pressure to fit the thermal insulation layer, ensuring uniform stress on the thermal insulation layer and avoiding the situation of excessive local deformation. An outer protective layer 8 is arranged outside the supporting straight plate device 6. The outer protective layer 8 is spliced into a cylindrical shape by rivets 801 to cover the entire installation structure and the thermal insulation layer, playing a protective role. Embodiment 2

[0023] Embodiment 2 discloses a construction and installation method for the fixing structure of the ultra-thick thermal insulation layer in Embodiment 1. The specific process and principle are as follows: The first pull rod 3, the supporting arc plate device 4, the second pull rod 5, and the supporting straight plate device 6 are processed according to the outer diameter of the thermal insulation equipment or pipeline and the required thermal insulation thickness. The first pull rod 3 is generally processed to a length equal to the thickness of two layers of thermal insulation materials. When welding of the pipeline 1 is allowed, the bottom end of the first pull rod 3 is directly welded and fixedly installed on the outer wall of the pipeline 1. When direct welding of the pipeline 1 is not allowed, the hoop 201 is wound around the outer wall of the pipeline 1. Through the locking bolt 203 and the locking piece 204, the distance between the hoops 201 is adjusted as required, and the hoop 201 is fixedly installed on the outer wall of the pipeline 1. The first pull rod 3 is fixedly installed on the installation platform 202, and at this time, an installation space is formed. The first layer of thermal insulation layer is laid in this installation space. The first pull rod 3 is located at the splicing joint of the thermal insulation layer or installation holes or grooves are processed on the thermal insulation layer to facilitate wrapping the first thermal insulation layer around the outer wall of the pipeline 1 as required.

[0024] After the first layer of thermal insulation layer is laid, the supporting arc plate device 4 is assembled on two adjacent first pull rods 3 in the axial direction of the pipeline. The locking nut 7 is screwed onto the top end of the first pull rod 3, and the locking nut 7 is screwed downward to force the supporting arc plate device 4 to translate towards the bottom end of the first pull rod 3, thereby compacting and fixing the first layer of thermal insulation layer.

[0025] The second pull rod 5 is screwed and fixed on the internal thread connection platform 402, and the second layer of thermal insulation layer is laid. The second layer of thermal insulation layer is wrapped around the outside of the supporting arc plate device 4 and the first layer of thermal insulation layer as required. The splicing joints of the second layer of thermal insulation layer and the first layer of thermal insulation layer are arranged staggeredly.

[0026] After the second layer of thermal insulation layer is laid, the supporting straight plate device 6 is assembled on two adjacent second pull rods 5 in the axial direction of the pipeline 1. The locking nut 7 is screwed onto the top end of the second pull rod 5, and the locking nut 7 is screwed downward to force the supporting straight plate device 6 to translate towards the bottom end of the second pull rod, thereby compacting and fixing the second layer of thermal insulation layer.

[0027] The outer protective layer 8 is spliced into a cylindrical shape using rivets 801, while tightly covering the entire installation structure and the thermal insulation layer to protect the thermal insulation layer.

[0028] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0029] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A super-thick thermal insulation layer fixing structure for a pipeline, comprising a pipeline, wherein uniformly distributed clamping devices are fixedly installed on the outer wall of the pipeline, wherein the clamping device comprises a clamping hoop, characterized in that: A first pull rod that is distributed circumferentially and diverges radially outward is connected to the outer wall of the clamp, and a supporting arc plate device is slidably connected to two axially adjacent first pull rods, and the supporting arc plate device is fixed to the first pull rod by a locking nut. A second pull rod that is radially outward is arranged in the middle of the supporting arc plate device, and a supporting straight plate device is slidably connected to two axially adjacent second pull rods, and the supporting straight plate device is fixed to the second pull rod by a locking nut.

2. The ultra-thick thermal insulation layer fixing structure for pipelines according to claim 1 is characterized in that: When the outer wall of the pipeline allows welding, the bottom end of the first tie rod is directly fixedly mounted on the outer wall of the pipeline, and the first tie rod is circumferentially distributed and diverges radially outward along the pipeline.

3. The ultra-thick thermal insulation layer fixing structure for pipelines according to claim 1 is characterized in that: The clamp is an arc-shaped circular ring strip, with locking plates symmetrically arranged at both ends of the clamp, a locking bolt screwed between the two locking plates, and circumferentially distributed mounting platforms arranged on the outer wall of the clamp, which are detachably connected to the bottom end of the first pull rod.

4. The ultra-thick thermal insulation layer fixing structure for pipelines according to claim 1 is characterized in that: The outer wall near the top of the first pull rod is provided with a mounting thread, and a locking nut is screwed on the mounting thread. The outer wall near both ends of the second pull rod is opened with mounting threads, and a locking nut is screwed on the mounting threads near the top of the second pull rod.

5. The ultra-thick thermal insulation layer fixing structure for pipelines according to claim 4 is characterized in that: The supporting arc plate device includes a supporting arc plate, and an internal threaded connection platform with an opening radially outward is arranged at the center of the supporting arc plate. The internal threaded connection platform is threadedly screwed with a second pull rod. The internal threaded connection platform has first through holes symmetrically opened on both sides of the axial direction. The first through holes are slidingly connected to the first pull rod. First wing-shaped pressure plates are symmetrically fixedly installed on the supporting arc plate on both sides of the first through holes. The first wing-shaped pressure plates and the supporting arc plate have the same central axis.

6. The ultra-thick thermal insulation layer fixing structure for pipelines according to claim 4 is characterized in that: The supporting straight plate device includes a supporting straight plate, with mounting arc plates fixedly connected at both ends of the supporting straight plate, a second through hole radially penetrating the center of the mounting arc plate is provided, the second through hole is slidably connected to the second pull rod, and second wing-shaped pressure plates are symmetrically fixedly installed on the mounting arc plates on both sides of the second through hole, and the second wing-shaped pressure plates are coaxial with the mounting arc plate.

7. The ultra-thick thermal insulation layer fixing structure for pipelines according to claim 1 is characterized in that: An outer protective layer is arranged on the outer side of the supporting straight plate device. The outer protective layer is spliced ​​into a cylindrical shape by rivets, and the outer protective layer covers the entire installation structure.

8. A construction and installation method using the ultra-thick thermal insulation layer fixing structure according to any one of claims 1 to 7, characterized in that: The steps include: 1) According to the outer diameter of the insulation equipment or pipeline and the required insulation thickness, the first tie rod, the supporting arc plate device, the second tie rod and the supporting straight plate device are processed. The first tie rod is generally processed to the thickness and length of two layers of insulation material. When the pipeline allows welding, the bottom end of the first tie rod is directly welded and fixed on the outer wall of the pipeline; when the pipeline does not allow direct welding, the clamp is wrapped around the outer wall of the pipeline, and the distance between the clamps is adjusted as required by the locking bolts and locking plates, and the clamp is fixed on the outer wall of the pipeline. The first tie rod is fixed on the mounting table, and an installation space is formed at this time; 2) Lay the first insulation layer, the first tie rod is located at the joint of the insulation layer or a mounting hole is processed on the insulation layer to facilitate the first insulation layer to be wrapped on the outer wall of the pipe as required; 3) After the first insulation layer is laid, assemble the arc plate device on the two first tie rods adjacent to each other in the pipeline axial direction, screw the locking nut on the top of the first tie rod, screw the locking nut downward to force the arc plate device to move horizontally toward the bottom of the first tie rod, and compact and fix the first insulation layer; 4) Screw and fix the second tie rod on the internal thread connection platform, lay the second insulation layer, and cover the supporting arc plate device and the outside of the first insulation layer as required. The joints of the second insulation layer and the first insulation layer are arranged alternately; 5) After the second insulation layer is laid, assemble the supporting straight plate device on the two second tie rods adjacent to each other in the pipeline axial direction, screw the locking nut on the top of the second tie rod, screw the locking nut downward to force the supporting straight plate device to move horizontally toward the bottom of the second tie rod, and compact and fix the second insulation layer; 6) Use rivets to splice the outer protective layer into a cylindrical shape, and at the same time tightly cover the entire installation structure and the outside of the insulation layer to protect the insulation layer.

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