A freezing protection and heat preservation device for heat supply pipe network in alpine region

Abstract

This utility model relates to the field of heating pipeline protection technology, and discloses a frost-proof and heat-insulating protection device for heating pipelines in high-altitude and cold regions. It includes: a main heating pipe and an inner aerogel insulation cylinder coaxially sleeved on the outer wall of the main heating pipe. The outer cylindrical surface of the inner aerogel insulation cylinder is coaxially and tightly fitted with an outer fiberglass protective cylinder. A circumferentially distributed sliding connection mechanism for thermal expansion between the concave surface inside the inner aerogel insulation cylinder and the metal surface of the outer wall of the main heating pipe is used. A circumferential gap snow-proof mechanism is engaged at the circumferential gaps at both ends of the inner and outer cylinders. This utility model provides a relative sliding gap through the clearance mechanism, buffering and releasing the outward expansion pressure of the pipe due to thermal expansion, preventing damage to the insulation material under pressure; combined with the inclined end shielding of the snow-proof mechanism, it blocks lateral wind and snow from penetrating into the inner side of the cylinder, preventing water accumulation from freezing and expanding the end joints, ensuring the long-term safe operation of the high-altitude and cold-region pipeline protection system.

Description

Technical Field

[0001] This utility model relates to the field of heating pipeline protection technology, and in particular to a frost protection and insulation device for heating pipelines in high-altitude and cold regions. Background Technology

[0002] In high-altitude and frigid regions, heating networks transport high-temperature hot water over long distances in extremely cold environments. Therefore, the outer perimeter of the network must be insulated to minimize heat loss. Under complex outdoor conditions, the insulation structure is subjected to long-term lateral wind and snow erosion, while the internal main heating pipes undergo frequent physical deformation due to changes in the transported water temperature.

[0003] Conventional pipe insulation methods involve directly and tightly wrapping insulation material around the outer wall of the metal heating pipe, and then sealing it with a rigid protective shell. When high-temperature hot water is introduced into the main heating pipe, it expands radially outward due to heat. When heating stops, the pipe wall cools and contracts, and strong external wind loads simultaneously cause lateral vibration and displacement of the pipe.

[0004] Because the insulation layer and the main heating pipe are in a rigid fit with no physical deformation clearance, the radial expansion force and lateral displacement generated by the outer wall of the pipe directly squeeze the fragile internal insulation material. The alternating hot and cold cycles cause the insulation structure to crack and break under the pressure of the pipe wall, and the rigid stress simultaneously pulls on the ends of the outer shell, creating gaps. External snow particles seep into the insulation layer through these gaps, melt upon heating, and then freeze again, triggering an irreversible freeze-thaw cycle that accelerates the structural failure and thermal resistance reduction of the pipe network insulation system.

[0005] Therefore, this utility model proposes a frost protection and insulation device for heating pipelines in high-altitude and cold regions to address the shortcomings of existing technologies. Utility Model Content

[0006] In view of the problems in the existing technology of antifreeze and insulation protection devices for heating pipe networks in high-altitude and cold regions, such as the internal insulation structure being prone to structural damage due to thermal expansion and lateral pressure, and the external protective shell having loose gaps at the ends due to rigid tension, which allow ice and snow to seep in and cause freeze-thaw cycles, this utility model aims to provide an improved antifreeze and insulation protection device for heating pipe networks in high-altitude and cold regions that can effectively solve the above problems.

[0007] This utility model provides a frost protection device for heating pipelines in cold regions, comprising: a main heating pipe and an inner aerogel insulation cylinder coaxially sleeved on the outer wall of the main heating pipe; an outer fiberglass protective cylinder coaxially sleeved on the outer wall of the inner aerogel insulation cylinder, a pipe wall thermal expansion clearance mechanism, and a circumferential gap snow isolation mechanism.

[0008] The tube wall thermal expansion clearance mechanism has a layered sliding structure that provides a floating buffer gap. It includes a slide rail that is bonded and fixed to the concave surface of the inner aerogel insulation cylinder. A lateral support block that is slidably connected to the top surface of the slide rail and generates lateral displacement under pressure is provided. A wear-resistant sliding pad is bonded and fixed to the inner side of the lateral support block. Limiting baffles are fixed at both ends of the slide rail.

[0009] Furthermore, the pipe wall thermal expansion clearance mechanism is circumferentially distributed and slidably connected between the inner concave surface of the inner aerogel insulation cylinder and the outer wall of the heating main pipe, and the inner side of the wear-resistant sliding pad slides against the outer wall of the heating main pipe; the circumferential gap snow isolation mechanism is snapped and fixed at the circumferential gap between the two end faces of the inner aerogel insulation cylinder and the outer fiberglass protective cylinder, physically shielding the exposed coaxial annular gap.

[0010] The circumferential gap snow-proofing mechanism includes an annular insert fixed to the outer ring of the end face of the inner aerogel insulation cylinder. An inclined baffle with a natural outward tilt is rotatably connected to the circumferential groove of the annular insert via a positioning pin. The positioning pin passes through the side wall of the groove and the end of the inclined baffle along the tangential direction of the annular insert to form a movable hinge point.

[0011] A dustproof filling strip that deforms under pressure is embedded and fixed in the gap between the inclined baffle and the annular seat. A waterproof edge with a downward-extending cross section is bonded and fixed to the outer side of the inclined baffle. The two work together to fill and cover the rotational fit gap at the outer end.

[0012] The outer fiberglass protective tube is secured with axial locking clamps at both ends of its outer circular surface, which provide radial binding force. The inner end face of the axial locking clamp abuts against the outer end face of the circumferential gap snow-proof mechanism, thus defining the floating boundary of the outer fiberglass protective tube along the main pipeline.

[0013] The inner aerogel insulation cylinder has a water-resistant aluminum foil pad layer that covers the pipe wall interface. The inner surface of the water-resistant aluminum foil pad layer is tightly attached to the outer wall of the heating main pipe, forming a continuous thin film barrier on the inner surface that blocks water vapor penetration.

[0014] The outer fiberglass protective cylinder has circumferentially fixed circumferential positioning blocks that protrude radially inward on its concave surface. The gap between the inner end face of the circumferential positioning blocks and the outer circular surface of the inner aerogel insulation cylinder provides physical limiting support for the inner and outer cylinders to resist external crosswinds.

[0015] The outer arc surface at the top of the outer fiberglass protective tube is fixed with a top drainage inclined plate that changes the water collection section of the cylindrical surface. The two sides of the top drainage inclined plate smoothly transition to the outer circular surface of the outer fiberglass protective tube in an inclined shape.

[0016] The bottom surface of the circumferential gap snow isolation mechanism is fixed with a grounding anti-corrosion copper sheet that provides a flow path. The lower end of the grounding anti-corrosion copper sheet extends vertically downward out of the outer perimeter of the bottom of the outer fiberglass protective cylinder and reserves a buried extension section for connection to the underground foundation soil layer.

[0017] This utility model has the following beneficial effects: 1. This utility model, by setting a circumferential sliding clearance mechanism between the heating main pipe and the inner insulation structure, changes the rigid constraint problem caused by the direct bonding of the conventional insulation layer. When the pipe expands radially due to heat or vibrates and shifts under load, the outer extrusion slider slides along the guide rail, converting the extrusion stress that originally acted directly on the insulation material into the floating displacement of the mechanical parts, buffering and dispersing the localized concentrated force, and preventing the inner insulation layer material from being crushed and cracked.

[0018] 2. This utility model incorporates a weight-bearing baffle structure at the end of the double-layer protective cylinder, which, in conjunction with flexible packing, seals the movement gaps, creating a physical isolation layer that prevents lateral wind and snow from intruding into the internal cavity of the cylinder. Ice and snow on the contact pipe surface are guided outwards by the external slope and edge structure, detaching from the pipe body and preventing external water from seeping into the equipment gaps, freezing, expanding, and opening the connection joints under low-temperature conditions. Attached Figure Description

[0019] Figure 1 This is a first-view perspective three-dimensional schematic diagram of a frost-proof and heat-insulating protective device for heating pipe networks in high-altitude and cold regions proposed in this utility model. Figure 2 This is a second-view perspective three-dimensional schematic diagram of a frost-proof and heat-insulating protective device for heating pipe networks in cold regions proposed in this utility model. Figure 3 This is a schematic diagram of the outer fiberglass protective cylinder of a frost-proof and heat-insulating protective device for heating pipe networks in high-altitude and cold regions proposed in this utility model; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the grounding and corrosion-resistant copper sheet of a frost-proof and heat-insulating protective device for heating pipe networks in high-altitude and cold regions, as proposed in this utility model. Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0020] Legend: 1. Main heating pipe; 2. Circumferential gap snow isolation mechanism; 201. Inclined baffle; 202. Annular insert; 203. Dustproof filler strip; 204. Positioning pin; 205. Waterproof edge; 3. Pipe wall thermal expansion clearance mechanism; 301. Lateral support block; 302. Slide rail; 303. Limiting baffle; 304. Wear-resistant sliding pad; 4. Inner aerogel insulation cylinder; 5. Outer fiberglass protective cylinder; 6. Axial locking clamp; 7. Waterproof aluminum foil pad; 8. Circumferential positioning support block; 9. Top drainage inclined plate; 10. Grounding anti-corrosion copper sheet. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] Please refer to Figures 1 to 6 This utility model provides a frost protection device for heating pipe networks in cold regions, which solves the problems of damage caused by wind and snow intrusion at the ends of the insulation layer in existing frost protection pipe networks, as well as the inability of rigid insulation layers to adapt to radial deformation of the pipes and crosswind vibration, which leads to damage to the insulation structure.

[0023] The antifreeze and insulation protection device for heating pipelines in high-altitude and cold regions includes a main heating pipe 1 and an inner aerogel insulation cylinder 4 coaxially sleeved on the outer wall of the main heating pipe 1.

[0024] The inner aerogel insulation cylinder 4 is coaxially sleeved with the outer fiberglass protective cylinder 5. The heating main pipe 1 serves as the hot water transport carrier. The inner aerogel insulation cylinder 4 provides basic heat insulation and antifreeze insulation. The outer fiberglass protective cylinder 5 covers the outside to resist external wind and snow erosion and physical impact.

[0025] The inner concave surface of the inner aerogel insulation cylinder 4 is circumferentially and slidably connected to the outer wall of the heating main pipe 1 by a pipe wall thermal expansion clearance mechanism 3. The pipe wall thermal expansion clearance mechanism 3 is used to provide circumferential movement gap to buffer the extrusion force when the pipeline expands due to heat and causes radial and lateral displacement.

[0026] The pipe wall thermal expansion clearance mechanism 3 includes a slide rail 302 bonded and fixed to the concave surface of the inner aerogel insulation cylinder 4. A lateral support block 301 is slidably connected to the top surface of the slide rail 302. The lateral support block 301 is subjected to force along the length direction of the slide rail 302 to generate sliding displacement. A wear-resistant sliding pad 304 is bonded and fixed to the inner side of the lateral support block 301. The wear-resistant sliding pad 304 is used to reduce the friction coefficient during the sliding process of the pipe wall contact surface and avoid wear on the pipe wall surface.

[0027] The inner side of the wear-resistant sliding pad 304 is attached to the outer wall of the heating main pipe 1. Both ends of the slide rail 302 are fixed with limit baffles 303. The limit baffles 303 are used to intercept and block the lateral support block 301 from sliding out of the travel boundary of the slide rail 302, so as to prevent the sliding structure from falling off and losing its support function.

[0028] A circumferential gap snow-blocking mechanism 2 is snapped and fixed at the circumferential gap between the two end faces of the inner aerogel insulation cylinder 4 and the outer fiberglass protective cylinder 5. The circumferential gap snow-blocking mechanism 2 is used to prevent lateral wind and snow particles from entering the gap between the inner and outer double cylinders through the end gap.

[0029] The circumferential gap snow-proofing mechanism 2 includes an annular insert 202 fixed to the outer ring of the end face of the inner aerogel insulation cylinder 4. An inclined baffle 201 is rotatably connected to the circumferential groove of the annular insert 202 via a positioning pin 204. The inclined baffle 201 maintains a downward tilting and hanging posture to block the gap by gravity. The positioning pin 204 passes through the side wall of the groove and the end of the inclined baffle 201 along the tangent of the annular insert 202 to provide a rotatable connection axis.

[0030] A dustproof filler strip 203 is embedded and fixed in the gap between the inclined baffle 201 and the annular insert 202. The dustproof filler strip 203 is made of flexible material to fill the gap of rotation and prevent fine ice and snow particles from seeping in.

[0031] A waterproof edge 205 is bonded and fixed to the outer side of the inclined baffle 201. The bottom end of the waterproof edge 205 extends out of the outer edge contour of the inclined baffle 201. The waterproof edge 205 is used to receive melted ice and snow water and guide the fluid to drip outwards and detach from the pipe structure, preventing water from accumulating and freezing, thus widening the end connection gap.

[0032] To solve the above-mentioned technical problems, the antifreeze and heat preservation protection device for heating pipelines in high-altitude and cold regions also includes an axial locking clamp 6. The axial locking clamp 6 forms a specific structural fit and connection relationship with the outer fiberglass protective cylinder 5 and the circumferential gap snow isolation mechanism 2.

[0033] The axial locking clamp 6 is fitted and tightly fixed to the outer circular surfaces at both ends of the outer fiberglass protective cylinder 5. The inner end face of the axial locking clamp 6 directly abuts and adheres to the outer end face of the circumferential gap snow isolation mechanism 2. The fit between the circumferential clamp and the end face abuts restricts the axial movement displacement of the outer fiberglass protective cylinder 5 during use and maintains the axial positional stability of the overall protective structure.

[0034] The inner aerogel insulation cylinder 4 has a water-proof aluminum foil pad 7 inside. The outer circular surface of the water-proof aluminum foil pad 7 is pasted and fixed to the inner circular surface of the inner aerogel insulation cylinder 4. The inner circular surface of the water-proof aluminum foil pad 7 is tightly attached to the outer wall of the heating main pipe 1. The water-proof aluminum foil pad 7 covers the entire concave surface of the inner aerogel insulation cylinder 4. The water-proof aluminum foil pad 7 is used to prevent water vapor generated on the surface of the heating main pipe 1 from penetrating to the outside, and to prevent internal water vapor from entering the aerogel material and causing a decrease in thermal resistance and insulation performance.

[0035] A circumferential positioning block 8 is provided between the outer fiberglass protective cylinder 5 and the inner aerogel insulation cylinder 4. The circumferential positioning block 8 is arranged at equal intervals along the circumference and fixed on the concave surface of the outer fiberglass protective cylinder 5. The inner end face of the circumferential positioning block 8 and the outer circular surface of the inner aerogel insulation cylinder 4 are kept in a gap-fitted state.

[0036] The gap fit between the circumferential positioning support block 8 and the outer circular surface of the inner aerogel insulation cylinder 4 provides deformation space for the pipe wall deformation of the double-layer cylinder structure. The gap fit restricts the excessive radial deviation of the outer fiberglass protective cylinder 5, ensuring that the double-layer insulation structure maintains a coaxial gap state when subjected to external lateral wind load.

[0037] A top hydrophobic inclined plate 9 is fixedly connected to the outer arc surface of the top of the outer fiberglass protective cylinder 5. The two sides of the top hydrophobic inclined plate 9 are inclined and smoothly transition to the outer circular surface of the outer fiberglass protective cylinder 5. The top hydrophobic inclined plate 9 is used to change the snow-holding section at the top of the cylindrical body, and guide the falling snow and melted ice water to slide quickly down to the two sides along the inclined surface and drain away.

[0038] A grounding anti-corrosion copper sheet 10 is fixedly connected to the bottom surface of the circumferential gap snow isolation mechanism 2. The lower end of the grounding anti-corrosion copper sheet 10 extends vertically downward to the outer periphery of the bottom of the outer fiberglass protective cylinder 5. The bottom extension end of the grounding anti-corrosion copper sheet 10 is inserted into the frozen soil on the ground surface. The grounding anti-corrosion copper sheet 10 is used to guide and disperse the stray current accumulated on the outer surface of the pipeline to the underground soil, thereby slowing down the electrochemical corrosion process of the metal wall of the heating main pipe 1 in a complex environment.

[0039] Based on the above embodiments, the present invention may further include the following preferred technical solutions: As a preferred embodiment, in order to reduce the coefficient of sliding friction caused by radial deformation of the pipe wall and crosswind vibration, the wear-resistant sliding pad 304 fixed on the inner side of the lateral support block 301 is made of polytetrafluoroethylene material. The sliding contact area between the top surface of the slide rail 302 and the bottom surface of the lateral support block 301 is coated with low-temperature resistant grease. The low-temperature resistant grease and the wear-resistant sliding pad 304 work together to ensure that the pipe wall thermal expansion relief mechanism 3 maintains smooth sliding in an ambient temperature below -30℃.

[0040] As another preferred embodiment, in order to fill the moving gaps between the moving parts and prevent fine ice and snow from seeping into the interior, the dustproof filler strip 203 is made of low-temperature resistant silicone sponge material and is in a compressed deformation state and is interference-fitted into the mating gap between the inclined baffle 201 and the annular insert 202. The bottom edge of the waterproof edge 205, which is bonded and fixed on the outer side of the inclined baffle 201, is an acute-angled bevel. The acute-angled bevel structure is convenient to receive and cut off the water droplets of melting ice and snow.

[0041] As another preferred embodiment, in order to improve the physical protection strength of the outer structure and maintain the dry state of the internal insulation material, the outer fiberglass protective cylinder 5 is made of glass fiber resin composite material pressed into a rigid pipe shell, and the water-proof aluminum foil pad 7 is attached and fixed on the inner circular surface of the inner aerogel insulation cylinder 4. The surface is continuous and flat without splicing seams, and the water-proof aluminum foil pad 7 completely wraps the outer wall of the heating main pipe 1 to prevent high temperature water vapor from penetrating outward.

[0042] As another preferred embodiment, in order to ensure that the double-layer insulation structure is coaxially arranged and subjected to uniform force, the radius of curvature of the inner arc surface of the circumferential positioning support block 8, which is circumferentially fixed at equal intervals on the concave surface of the outer layer fiberglass protective cylinder 5, is equal to the radius of curvature of the outer surface of the inner layer aerogel insulation cylinder 4. The inner end face of the circumferential positioning support block 8 and the outer circular surface of the inner layer aerogel insulation cylinder 4 are kept in a curved sliding fit.

[0043] As another preferred embodiment, in order to accelerate the drainage speed of water accumulation on the top of the outer shell and conduct charge, the top drainage slope 9 fixed to the top of the outer fiberglass protective cylinder 5 has a double slope structure with a raised middle and inclined to both sides. The grounding anti-corrosion copper sheet 10 fixed to the bottom of the circumferential gap snow isolation mechanism 2 is made of copper strip material and extends downward through the ground surface to the depth of the underground permafrost layer.

[0044] Working principle: After high-temperature hot water is introduced into the heating main pipe 1, the pipe wall expands and vibrates outward. The water-proof aluminum foil pad 7 continuously prevents the high-temperature water vapor emitted from the pipe wall surface from diffusing and penetrating outward, maintaining the physical dryness of the insulation material inside the inner aerogel insulation cylinder 4.

[0045] When the heating main pipe 1 undergoes radial expansion and lateral displacement, squeezing the outer protective structure, the outer surface of the pipe wall directly contacts and pushes the wear-resistant sliding pad 304 on the inner side of the pipe wall thermal expansion relief mechanism 3. The lateral support block 301 is driven by the extrusion force to generate a circumferential relative sliding displacement along the top surface of the slide rail 302. The mechanical sliding process buffers and releases the local rigid stress transmitted by the deformation of the pipe wall. The limiting baffle 303 intercepts the sliding movement boundary of the lateral support block 301 at both ends of the slide rail 302, preventing the inner aerogel insulation cylinder 4 from cracking due to internal expansion force.

[0046] When crosswinds carry ice and snow particles to wash over the circumferential gap at the end of the equipment, the inclined baffle 201 on the outside of the circumferential gap snow isolation mechanism 2 rotates around the positioning pin 204 and maintains an outward tilting and drooping shielding posture by its own weight. After the wind and snow particles hit the surface of the inclined baffle 201, they slide down the inclined surface of the outer surface. The dustproof filling strip 203 simultaneously seals the rotational fit gap reserved inside the annular insert 202, cutting off the physical path of ice and snow particles into the gap inside the double-layer cylinder structure.

[0047] After the snow on the top of the outer fiberglass protective cylinder 5 melts, it is accelerated to flow away to both sides of the pipe body under the guidance of the double-sided slope of the top drainage inclined plate 9. The snow melt water attached to the end of the equipment slides down the outside of the inclined baffle 201 and drips and separates at the bottom sharp edge of the waterproof edge 205. The axial locking hoop 6 and the circumferential positioning support block 8 work together to constrain the two-layer cylinder structure to maintain a coaxial and relatively static assembly state. The grounding anti-corrosion copper sheet 10 continuously guides the stray currents captured and accumulated by the external components of the equipment into the deep underground permafrost.

[0048] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A high-cold-area heat supply pipe network anti-freezing and heat preservation protection device, comprising a heat supply main pipe (1), characterized in that, The outer wall of the heating main pipe (1) is coaxially fitted with an inner aerogel insulation cylinder (4), and the outer wall of the inner aerogel insulation cylinder (4) is coaxially fitted with an outer fiberglass protective cylinder (5); a pipe wall thermal expansion relief mechanism (3) is circumferentially distributed and slidably connected between the concave surface of the inner aerogel insulation cylinder (4) and the outer wall of the heating main pipe (1), and the pipe wall thermal expansion relief mechanism (3) includes a slide rail (302) bonded and fixed to the concave surface of the inner aerogel insulation cylinder (4). A side support block (301) is slidably connected to the top surface of the slide rail (302). A wear-resistant sliding pad (304) is pasted and fixed on the inner side of the side support block (301). The inner side of the wear-resistant sliding pad (304) is attached to the outer wall of the heating main pipe (1). Limiting baffles (303) are fixed at both ends of the slide rail (302). A circumferential gap snow-proof mechanism (2) is snapped and fixed at the circumferential gaps at both ends of the inner aerogel insulation cylinder (4) and the outer fiberglass protective cylinder (5).

2. The anti-freezing and heat-preserving device for heat supply pipe network in high-cold region according to claim 1, characterized in that, The circumferential gap snow isolation mechanism (2) includes an annular insert (202) fixed to the outer ring of the end face of the inner aerogel insulation cylinder (4). An inclined baffle (201) is rotatably connected to the circumferential groove of the annular insert (202) through a positioning pin (204).

3. The anti-freezing and heat-preserving device for heat supply pipe network in high-cold region according to claim 2, characterized in that, A dustproof filler strip (203) is embedded and fixed in the gap between the inclined baffle (201) and the annular insert (202). A water-proof edge (205) is bonded and fixed to the outer side of the inclined baffle (201). The positioning pin (204) passes through the side wall of the slot and the end of the inclined baffle (201) tangentially along the annular insert (202).

4. The anti-freezing and heat-preserving device for heating pipe network in high-cold region according to claim 1, characterized in that, The outer fiberglass protective tube (5) has an axial locking hoop (6) tightly fixed on the outer circular surface at both ends, and the inner end face of the axial locking hoop (6) abuts against the outer end face of the circumferential gap snow isolation mechanism (2).

5. The antifreeze and heat preservation protection device for heating pipelines in high-altitude and cold regions according to claim 1, characterized in that, The inner aerogel insulation cylinder (4) has a water-proof aluminum foil pad (7) attached to its inner circular surface, and the inner circular surface of the water-proof aluminum foil pad (7) is attached to the outer wall of the heating main pipe (1).

6. The high-cold region heat supply pipe network anti-freezing and heat preservation protection device according to claim 1, characterized in that, The outer fiberglass protective cylinder (5) has circumferentially fixed circumferential positioning blocks (8) on its concave surface, and the gap between the inner end face of the circumferential positioning blocks (8) and the outer circular surface of the inner aerogel insulation cylinder (4) is fitted together.

7. The high-cold region heat supply pipe network anti-freezing and heat preservation protection device according to claim 1, characterized in that, The outer arc surface of the outer fiberglass protective tube (5) is fixed with a top hydrophobic inclined plate (9), and the two sides of the top hydrophobic inclined plate (9) are smoothly transitioned to the outer circular surface of the outer fiberglass protective tube (5) in an inclined manner.

8. The anti-freezing and heat-preserving device for heat supply pipe network in high-cold region according to claim 1, characterized in that, The bottom surface of the circumferential gap snow isolation mechanism (2) is fixed with a grounding anti-corrosion copper sheet (10), and the lower end of the grounding anti-corrosion copper sheet (10) extends vertically downward out of the bottom outer contour of the outer fiberglass protective cylinder (5).

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