Cold insulation device for tower and pipeline and installation method

Abstract

The invention discloses a tower and pipeline cold insulation device and an installation method, the tower and pipeline cold insulation device comprises a grid framework and a cold insulation layer, the cold insulation layer is connected outside tower equipment, the grid framework is sleeved outside the cold insulation layer, the grid framework comprises a plurality of annular transverse flat steels and vertical flat steels, the vertical flat steels are connected outside the annular transverse flat steels, and the vertical flat steels are connected outside the annular transverse flat steels. The annular transverse flat steel bars are connected into a cylindrical structure through the vertical flat steel bars, an outer protection layer is further connected to the outer portion of the grid framework, supporting blocks are further connected to the inner sides of the annular transverse flat steel bars, and the supporting blocks make contact with the cold insulation layer. The cold insulation layer is preliminarily fixed through the soft strapping tape, then the grid framework is arranged outside the cold insulation layer in a sleeving mode, the supporting blocks with the width larger than the width of the reserved expansion joint are connected into the grid framework, the supporting blocks inwards press the cold insulation layer on equipment, and when gaps are generated due to thermal expansion and cold contraction of the cold insulation layer, the supporting blocks are connected into the grid framework. And the elastic supporting blocks can also extend to press the cold insulation layer on the equipment, so that the cold insulation layer is prevented from slipping off due to gaps.

Description

Technical Field

[0001] The invention belongs to the field of equipment and pipeline cold preservation, and in particular relates to a tower and pipeline cold preservation device and an installation method. Background Art

[0002] In the petrochemical industry, equipment used to store low-temperature media at -200℃ to 0℃ usually needs to be kept cold, and the cold insulation layer is installed on the outer wall of the equipment. The cold insulation layer is generally composed of cold insulation materials, moisture-proof layer and outer protective layer, among which the protective layer plays the role of waterproof, windproof and UV protection.

[0003] During the installation and fixing process of the cold insulation layer, in order to prevent water vapor from entering, the support parts on the side of the cold insulation layer close to the equipment are not allowed to penetrate the cold insulation layer; nor are blind rivets, self-tapping screws, etc. embedded in the cold insulation layer. Therefore, during the cold insulation construction process, the outer protective layer (such as 0.5-0.7mm thick aluminum sheet, galvanized iron sheet, stainless steel sheet, etc.) is usually fixed by first biting the protective layers and then tying them with steel belts.

[0004] The method of fixing the outer protective layer by first biting and then tying with steel straps is simple and practical for horizontal equipment, pipelines, and small vertical equipment with a height of less than 2m, and the construction is quick and convenient. However, the method of fixing the outer protective layer by first biting and then tying with steel straps is not applicable to large towers in a deep cold environment with a height greater than 2m, and there are safety risks. The cold insulation materials of deep cold equipment will have a certain degree of thermal expansion and contraction. Usually, the ambient temperature when the cold insulation materials are installed is between 10℃ and 40℃; when the equipment is running, the temperature is usually between -196℃ and -50℃, and the cold insulation materials shrink, resulting in gaps between the cold insulation materials and the outer protective layer. During the cold insulation process of tower equipment, the higher the equipment, the higher the risk of the outer protective layer slipping. Summary of the invention

[0005] The purpose of the present invention is to provide a tower and pipeline cold insulation device and installation method to solve the problem of outer protective layer sliding off due to thermal expansion and contraction during the tower cold insulation process.

[0006] The objective of the present invention is achieved through the following technical means: a cold insulation device for towers and pipelines, comprising a grid frame and a cold insulation layer, the cold insulation layer is connected to the outside of the tower equipment, the grid frame is sleeved outside the cold insulation layer, the grid frame comprises a plurality of annular transverse flat steels and vertical flat steels, the vertical flat steels are connected to the outside of the annular transverse flat steels, a plurality of vertical flat steels connect a plurality of annular transverse flat steels into a cylindrical structure, the bottom of the vertical flat steels are supporting legs, the tops of a plurality of vertical flat steels are bent toward the center of the circle and connected at the center of the circle, an outer protective layer is also connected to the outside of the grid frame, a support block is also connected to the inside of the annular transverse flat steel, and the support block is in contact with the cold insulation layer.

[0007] The grid framework is also connected with iron wires, which are connected to the diagonal lines of the grid.

[0008] A method for installing a cold preservation device for a tower and a pipeline comprises the following steps:

[0009] Step 1: Fix the cold insulation layer, connect the cold insulation material to the tower equipment, and seal the cold insulation material into an integrated cold insulation layer. The joints of the cold insulation material are sealed with a sealing adhesive. The cold insulation material is diene or nitrile rubber;

[0010] Step 2: Processing the mesh skeleton: weld the flat steel into a circular ring shape, with the wide surface of the flat steel facing the center of the circle, that is, weld into a circular horizontal flat steel, weld the wide surface of the vertical flat steel on the outer wide surface of the circular horizontal flat steel, and form a cylindrical mesh skeleton. The reserved section at the bottom of the vertical flat steel is used as a leg, and the top of the vertical flat steel is welded into a watermelon-like mesh skeleton. Iron wires are also welded on the diagonal lines of each mesh;

[0011] Step 3: Hoist the grid frame to the outside of the equipment, cover the equipment and the cold insulation layer, and the diameter of the grid frame is larger than the diameter of the cold insulation layer, and an expansion joint is reserved between the grid frame and the cold insulation layer;

[0012] Step 4: Fix the support blocks, connect a number of support blocks inside each annular transverse flat steel, wherein the width of the support blocks is greater than the width of the expansion joint;

[0013] Step 5: Fix the outer protective layer by using blind rivets from bottom to top to rivet the outer protective layer to the flat steel of the grid skeleton without damaging the cold insulation layer, and firmly connect the legs to the equipment foundation.

[0014] The outside of the cold-insulating layer is also bundled with a soft bundling belt.

[0015] In the grid skeleton, the diameter of the circle formed by the annular transverse flat steel is the sum of the diameter of the cold insulation layer and twice the width of the expansion joint.

[0016] The material of the outer protective layer is the same as that of the grid skeleton.

[0017] If there are protruding parts on the equipment, a gap should be reserved on the annular transverse flat steel after the grid frame is hoisted.

[0018] The outer protective layer is formed by overlapping a plurality of outer protective layer sheets into a whole, and the protective layer sheets are vertically bundled.

[0019] After step 5, the piping is sealed for cold preservation.

[0020] If there is a boss on the cross section of the pipe support and the thickness of the pipe insulation layer is smaller than that of the pipe support, then a first layer of nitrile rubber is added outside the pipe insulation layer near the pipe support so that the first layer of nitrile rubber is flush with the pipe support, and a second layer of nitrile rubber is connected at the joint between the first layer of nitrile rubber and the pipe support;

[0021] If there is a boss on the cross section of the pipe support, and the thickness of the pipe insulation layer is equal to the thickness of the pipe support, connect the first layer of nitrile rubber at the joint between the pipe insulation layer and the pipe support;

[0022] If the cross section of the pipe support is a plane, and the thickness of the pipe insulation layer is equal to the thickness of the pipe support, connect the first layer of nitrile rubber at the joint between the pipe insulation layer and the pipe support;

[0023] If the cross-section of the pipe support is flat and the thickness of the pipe insulation layer is smaller than that of the pipe support, a first layer of nitrile rubber is added outside the pipe insulation layer near the pipe support so that the first layer of nitrile rubber is flush with the pipe support, and a second layer of nitrile rubber is connected at the joint between the first layer of nitrile rubber and the pipe support.

[0024] The beneficial effects of the present invention are:

[0025] 1. Use soft strapping tape to initially fix the cold insulation layer, then put the grid frame over the cold insulation layer, connect the support block with a width greater than the reserved expansion joint width to the inside of the grid frame, and press the cold insulation layer against the equipment with the support block. When the cold insulation layer expands and contracts due to heat and creates gaps, the elastic support block will also stretch to press the cold insulation layer against the equipment, thus preventing the cold insulation layer from slipping due to the gaps.

[0026] 2. Through the grid bracket, traditional angle steel and other supports cannot solve the problem of cold bridges, thereby reducing the cold loss of tower equipment and realizing the effective operation of the cold insulation layer of tower equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the cold insulation layer installation structure;

[0028] Figure 2 for Figure 1 A magnified view of the structure at center;

[0029] Figure 3 This is a schematic diagram of the mesh skeleton;

[0030] Figure 4 This is a partial enlarged view of the mesh skeleton;

[0031] Figure 5 This is a top view of the mesh skeleton;

[0032] Figure 6 This is the first type of cold-insulation structure diagram of the pipe support with bosses;

[0033] Figure 7This is the second type of cold-insulation structure diagram of the pipe support with boss;

[0034] Figure 8 This is the first type of cold-insulation structure diagram of the pipe support without boss;

[0035] Fig. 9 This is the second type of cold-insulation structure diagram of the pipe support without boss;

[0036] In the figure, 1 is a grid frame; 1-1 is annular horizontal flat steel; 1-2 is vertical flat steel; 2 is a cold insulation layer; 3 is a supporting leg; 4 is an outer protective layer; 5 is an iron wire; 6 is a supporting block; and 7 is a device body.

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0038] [Example 1]

[0039] A cold insulation device for a tower and a pipeline comprises a grid frame 1 and a cold insulation layer 2, wherein the cold insulation layer 2 is connected to the outside of the tower equipment, the grid frame 1 is sleeved outside the cold insulation layer 2, the grid frame 1 comprises a plurality of annular transverse flat steels 1-1 and vertical flat steels 1-2, the vertical flat steels 1-2 are connected to the outside of the annular transverse flat steels 1-1, and a plurality of vertical flat steels 1-2 connect a plurality of annular transverse flat steels 1-1 into a cylindrical structure, the bottom of the vertical flat steels 1-2 are supporting legs 3, and the tops of the plurality of vertical flat steels 1-2 are bent toward the center of a circle and connected at the center of the circle, an outer protective layer 4 is also connected to the outside of the grid frame 1, and a support block 6 is also connected to the inside of the annular transverse flat steel 1-1, and the support block 6 is in contact with the cold insulation layer 2.

[0040] The grid skeleton 1 is also connected with iron wires 5, which are connected to the diagonal lines of the grid.

[0041] like Figure 1 As shown, the cold insulation layer 2 is connected to the equipment body 7 by pasting, without relying on the various supporting parts on the equipment body 7. The grid frame 1 is sleeved outside the cold insulation layer 2, and a certain gap is left between the two as an expansion joint, such as Figure 2 As shown, the inner side of the grid skeleton 1 is connected to an elastic support block 6 , which is made of an elastic rubber-like material. The support block 6 presses the protective layer 6 onto the device body 7 , and the outer side of the grid skeleton 1 is connected to an outer protective layer 4 .

[0042] like Figures 3 to 5 As shown, the grid skeleton 1 is composed of annular transverse flat steels 1-1 and vertical flat steels 1-2. Several annular transverse flat steels 1-1 are arranged vertically into a cylindrical shape. The vertical flat steels 1-2 connect the annular transverse flat steels 1-1 of different heights from the outside of the annular transverse flat steels 1-1. The annular transverse flat steels 1-1 and the vertical flat steels 1-2 form a cylindrical grid skeleton 1. The bottom of the vertical flat steels 1-2 is a support leg 3, which is welded to the equipment foundation. The top is as shown in FIG. Figure 5 As shown, it is bent toward the center of the circle to form a watermelon-like grid skeleton, and the end is welded to the top of the vertical flat steel 1-2.

[0043] The grid skeleton 1 has a plurality of approximately quadrilateral grids formed by annular transverse flat steels 1-1 and vertical flat steels 1-2, and each diagonal line of the grid is connected with a wire 5, such as Figure 3 As shown, it plays the role of fixing and stabilizing the grid skeleton 1.

[0044] A method for installing a cooling device for a tower and a pipeline comprises the following steps:

[0045] Step 1: fix the cold insulation layer 2, connect the cold insulation material to the tower equipment, and stick the cold insulation material to seal the cold insulation layer 2, seal the joints of the cold insulation material with a sealing adhesive, and the cold insulation material is diene or nitrile rubber;

[0046] The outside of the cold-insulating layer 2 is also bound with a soft binding belt.

[0047] First, the cold insulation layer 2 is fixed on the equipment body 7. The cold insulation material is mainly diene and nitrile rubber. It is pasted and connected to the surface of the equipment. Several cold insulation materials are pasted and sealed to form a whole, that is, the cold insulation layer 2. On the cold insulation layer 2, the joints of each cold insulation material are sealed with a sealing adhesive. Then use a soft strapping tape to tie the cold insulation layer 2 to the equipment.

[0048] Step 2, mesh skeleton 1 processing, flat steel is welded into a circular ring shape, with the wide surface of the flat steel facing the center of the circle, that is, welded into a circular transverse flat steel 1-1, and the wide surface of the vertical flat steel 1-2 is welded on the outer wide surface of the circular transverse flat steel 1-1 to form a cylindrical mesh skeleton, the bottom end of the vertical flat steel 1-2 is reserved as a leg 3, and the top of the vertical flat steel 1-2 is welded into a watermelon rind-like mesh skeleton, and iron wire 5 is also welded on the diagonal of each mesh;

[0049] In the grid skeleton 1, the diameter of the circle formed by the annular transverse flat steel 1-1 is the sum of the diameter of the cold insulation layer 2 and twice the width of the expansion joint.

[0050] The material of the outer protective layer 4 is the same as that of the grid frame 1. The material of the flat steel in the grid frame 1 should be consistent with that of the outer protective layer 4. For example, when the outer protective layer 4 is a stainless steel sheet, the flat steel should be made of stainless steel.

[0051] If there are protruding parts on the equipment, a gap is reserved on the annular transverse flat steel 1-1 after the grid frame is hoisted.

[0052] Next, process the grid frame 1. Since the grid frame 1 is to be put outside the cold insulation layer 2, the diameter, that is, the diameter of the circle of the annular transverse flat steel 1-1 must be larger than the diameter of the cold insulation layer 2, leaving space for the expansion joint, so that it is easy to hoist. The diameter of the circle formed by the annular transverse flat steel 1-1 is the diameter of the cold insulation layer 2 + 2 times the reserved expansion joint width.

[0053] First, weld the 20×2mm flat steel into a circular ring with the wide side facing the center of the circle. The diameter of the ring (circular transverse flat steel 1-1) is: the outer diameter of the equipment cylinder + 2×the thickness of the cold insulation layer 2 (the outer diameter of the cylinder + 2×the thickness of the cold insulation layer, that is, the diameter of the cold insulation layer 2) + the width of the expansion and contraction reserved seam of the cold insulation layer 2. The number of rings is: the height of the equipment cylinder / 850mm+1; secondly, weld the vertical flat steel 1-2 on the outer wide side of the circular transverse flat steel 1-1, and weld 30×5mm at the 12, 3, 6, and 9 o'clock positions of the circular transverse flat steel 1-1. Flat steel, 30×3mm flat steel is welded at other positions at intervals ≤500mm, and the wide surfaces are welded together. The bottom layer of vertical flat steel 1-2 reserves 50mm long support legs 3; thirdly, according to the shape of the horizontal cylinder, all the rings are welded one by one with the corresponding vertical flat steel 1-2 to form a cylindrical grid skeleton; fourthly, a wire 5 with a fixed diameter of 2.5mm is welded on each grid; finally, according to the size of the equipment head, at one end of the welded cylindrical grid skeleton, the corresponding flat steel is welded to form a watermelon-like grid skeleton to close the end.

[0054] In the case of external accessories such as ladders and platforms, gaps can be reserved. For example, from bottom to top, there is a raised platform or other external accessories at the height of the third to fourth layers of circular transverse flat steel 1-1, then corresponding gaps are reserved on the first to third layers of circular transverse flat steel 1-1, and the gaps are hoisted along the gaps, and the gaps are repaired by welding after the hoisting is completed.

[0055] Step 3: hoist the grid frame 1 to the outside of the equipment, cover the equipment and the cold insulation layer 2, and the diameter of the grid frame 1 is larger than the diameter of the cold insulation layer 2, and an expansion joint is reserved between the grid frame 1 and the cold insulation layer 2;

[0056] Use slings to fix the slings at 12, 3, 6 and 9 o'clock in the middle of the height of the grid frame 1 for load bearing; secondly, install the slings or hangers for positioning at the head of the grid frame 1, and then carry out the hoisting; thirdly: adjust the position of the frame, completely cover the tower equipment in the grid frame, ensure that the expansion joints between the frame and the cold insulation layer 2 are evenly reserved, and then the hoisting is completed;

[0057] Step 4: fix the support blocks 6, connect a number of support blocks 6 to the inner side of each annular transverse flat steel 1-1, wherein the width of the support blocks 6 is greater than the width of the expansion joint;

[0058] Fourth: Inside the annular transverse flat steel 1-1, each layer is fixed with hot melt bonding or adhesive bonding to the support block 6, such as Figure 2 As shown, the length and width of the support block 6 are twice the expansion joint, and the thickness is equal to the width of the expansion joint. 4-6 blocks are installed in each circle, evenly distributed up and down and left and right: Finally: the skeleton of the bottom circle is completely welded to the equipment foundation.

[0059] The support block 6 should be made of a rubber-like non-metallic material with a certain elasticity.

[0060] The elastic support block 6 presses the cold insulation layer 2 against the device. Even if the cold insulation layer 2 shrinks and a gap is formed between the cold insulation layer 2 and the device, the support block 6 will extend accordingly to continue pressing the cold insulation layer 2 against the device to fill the gap caused by the shrinkage.

[0061] Step 5: Fix the outer protective layer 4 by using blind rivets from bottom to top to rivet the outer protective layer 4 to the flat steel of the grid skeleton 1 without damaging the cold insulation layer 2, and firmly connect the legs 3 to the equipment foundation.

[0062] The outer protective layer 4 is formed by overlapping a plurality of outer protective layer sheets into a whole, and the protective layer sheets are vertically bundled.

[0063] The outer protective layer sheet is installed from bottom to top. The outer protective layer sheet is riveted to the flat steel of the grid skeleton 1 with blind rivets. The rivets cannot damage the cold insulation layer 2. Secondly, the protective layer sheet is overlapped up and down and left and right. The overlap width is not less than 300mm. The upper layer presses the lower layer and the right side presses the left side. Thirdly, after the installation of the protective layer sheet is completed, a 20×0.5mm steel belt is used for further bundling at an interval of about two meters vertically. Finally, apply waterproof and patient external line sealant to all joints and gaps.

[0064] After step five, the piping is also sealed and insulated. Since there are often pipes on the equipment and pipe supports are needed in some places to support the pipes, the joints between the pipes and the pipe supports need to be insulated.

[0065] If there is a boss on the cross section of the pipe support and the thickness of the pipe insulation layer is smaller than that of the pipe support, then a first layer of nitrile rubber is added outside the pipe insulation layer near the pipe support so that the first layer of nitrile rubber is flush with the pipe support, and a second layer of nitrile rubber is connected at the joint between the first layer of nitrile rubber and the pipe support;

[0066] If there is a boss on the cross section of the pipe support, and the thickness of the pipe insulation layer is equal to the thickness of the pipe support, connect the first layer of nitrile rubber at the joint between the pipe insulation layer and the pipe support;

[0067] If the cross section of the pipe support is a plane and the thickness of the pipe insulation layer is equal to the thickness of the pipe support, connect the first layer of nitrile rubber at the joint between the pipe insulation layer and the pipe support;

[0068] If the cross-section of the pipe support is flat and the thickness of the pipe insulation layer is smaller than that of the pipe support, a first layer of nitrile rubber is added outside the pipe insulation layer near the pipe support so that the first layer of nitrile rubber is flush with the pipe support, and a second layer of nitrile rubber is connected at the joint between the first layer of nitrile rubber and the pipe support.

[0069] Piping cold insulation sealing is mainly aimed at the situation where the thickness of the pipeline cold insulation layer is inconsistent with the thickness of the cold insulation pipe support and there are blank sections. The following overlap method is adopted according to the size of the cold insulation pipe support.

[0070] like Figure 6 As shown in the figure, the pipe support section has a boss, and the thickness of the pipe's own cold insulation layer is less than that of the pipe support. Then, a first layer of nitrile rubber is added outside the pipe cold insulation layer near the pipe support, flush with the pipe support. Then, a second layer of 25mm nitrile rubber is added at the joint.

[0071] like Figure 7 As shown, there is a boss on the cross section of the pipe support, and the thickness of the pipe's own cold insulation layer is equal to the thickness of the pipe support. The first layer of 25mm nitrile rubber is directly added at the joint between the pipe's own cold insulation layer and the pipe support.

[0072] like Figure 8 As shown, there is no boss, the thickness of the pipe's own cold insulation layer is equal to the thickness of the pipe support's cold insulation layer, and the first layer of 25mm nitrile rubber is directly added at the joint between the pipe's own cold insulation layer and the pipe support.

[0073] like Fig. 9 As shown, there is no boss, and the thickness of the pipe's own cold insulation layer is less than the thickness of the pipe support. Then, add a first layer of nitrile rubber outside the pipe's cold insulation layer near the pipe support, flush with the pipe support. Then add a second layer of 25mm nitrile rubber at the joint.

[0074] All the outermost nitrile rubber, the outer wall of the pipe support, and the cold insulation layer of the pipeline itself are connected to the protective layer.

Claims

1. A cooling device for towers and pipelines, characterized in that: The invention comprises a grid frame (1) and a cold insulation layer (2), wherein the cold insulation layer (2) is connected to the outside of the tower equipment, and the grid frame (1) is sleeved outside the cold insulation layer (2). The grid frame (1) comprises a plurality of annular transverse flat steels (1-1) and vertical flat steels (1-2), wherein the vertical flat steels (1-2) are connected to the outside of the annular transverse flat steels (1-1), and the plurality of vertical flat steels (1-2) connect the plurality of annular transverse flat steels (1-1) into a cylindrical structure, wherein the bottom of the vertical flat steels (1-2) are supporting legs (3), and the tops of the plurality of vertical flat steels (1-2) are bent toward the center of the circle and connected at the center of the circle, and the outside of the grid frame (1) is also connected to an outer protective layer (4), and the inside of the annular transverse flat steels (1-1) is also connected to a support block (6), and the support block (6) is in contact with the cold insulation layer (2).

2. A cooling device for a tower and a pipeline according to claim 1, characterized in that: The grid framework (1) is also connected to iron wires (5), which are connected to the diagonal lines of the grid.

3. A method for installing a cooling device for a tower and a pipeline, characterized in that: The steps include: Step 1, fixing the cold insulation layer (2), connecting the cold insulation material to the tower equipment, and pasting and sealing the cold insulation material to form an integrated cold insulation layer (2), and sealing the joints of the cold insulation material with a sealing adhesive, wherein the cold insulation material is diene or nitrile rubber; Step 2, processing the mesh skeleton (1), welding the flat steel into a circular ring shape, with the wide surface of the flat steel facing the center of the circle, that is, welding into a circular transverse flat steel (1-1), welding the wide surface of the vertical flat steel (1-2) on the outer wide surface of the circular transverse flat steel (1-1) to form a cylindrical mesh skeleton, the reserved section at the bottom end of the vertical flat steel (1-2) is used as a leg (3), and the top of the vertical flat steel (1-2) is welded into a watermelon rind-like mesh skeleton, and iron wires (5) are also welded on the diagonal lines of each mesh; Step 3: hoisting the grid frame (1), hoisting the grid frame (1) outside the equipment, covering the equipment and the cold insulation layer (2), and the diameter of the grid frame (1) is larger than the diameter of the cold insulation layer (2), and an expansion joint is reserved between the grid frame (1) and the cold insulation layer (2); Step 4: fix the support blocks (6), connect a plurality of support blocks (6) to the inner side of each annular transverse flat steel (1-1), wherein the width of the support blocks (6) is greater than the width of the expansion joint; Step 5: fix the outer protective layer (4) by using blind rivets from bottom to top to rivet the outer protective layer (4) to the flat steel of the grid frame (1) without damaging the cold insulation layer (2), and firmly connect the legs (3) to the equipment foundation.

4. The method for installing a cooling device for a tower and a pipeline according to claim 3, characterized in that: The outside of the cold-insulating layer (2) is also bound with a soft binding belt.

5. The method for installing a cooling device for a tower and a pipeline according to claim 3, characterized in that: In the grid frame (1), the diameter of the circle formed by the annular transverse flat steel (1-1) is the sum of the diameter of the cold insulation layer (2) and twice the width of the expansion joint.

6. The method for installing a cooling device for a tower and a pipeline according to claim 3, characterized in that: The material of the outer protective layer (4) is the same as that of the grid skeleton (1).

7. The method for installing a cooling device for a tower and a pipeline according to claim 3, characterized in that: If there are protruding parts on the equipment, a gap is reserved on the annular transverse flat steel (1-1), after the grid frame is hoisted.

8. The method for installing a cooling device for a tower and a pipeline according to claim 3, characterized in that: The outer protective layer (4) is a plurality of outer protective layer thin plates overlapped and connected into a whole, and the protective layer thin plates are vertically bundled.

9. The method for installing a cooling device for a tower and a pipeline according to claim 3, characterized in that: After step 5, the piping is sealed for cold preservation. If there is a boss on the cross section of the pipe support and the thickness of the pipe insulation layer is smaller than that of the pipe support, then a first layer of nitrile rubber is added outside the pipe insulation layer near the pipe support so that the first layer of nitrile rubber is flush with the pipe support, and a second layer of nitrile rubber is connected at the joint between the first layer of nitrile rubber and the pipe support; If there is a boss on the cross section of the pipe support, and the thickness of the pipe insulation layer is equal to the thickness of the pipe support, connect the first layer of nitrile rubber at the joint between the pipe insulation layer and the pipe support; If the cross section of the pipe support is a plane and the thickness of the pipe insulation layer is equal to the thickness of the pipe support, connect the first layer of nitrile rubber at the joint between the pipe insulation layer and the pipe support; If the pipe support cross section is a plane and the pipe insulation thickness is less than the pipe support insulation thickness, At the pipe support, a first layer of nitrile rubber is added outside the pipe cold insulation layer so that the first layer of nitrile rubber is flush with the pipe support. A second layer of nitrile rubber is connected to the seam between the first layer of nitrile rubber and the pipe support.

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