Heat preservation type heating and ventilation pipeline for heating and ventilation engineering

Abstract

The utility model discloses a heat preservation type heating and ventilation pipeline for heating and ventilation engineering, which comprises an inner conveying pipe, a composite heat preservation layer, a vapor barrier layer and an outer protective sleeve which are sequentially and fixedly arranged from inside to outside, the composite heat preservation layer is formed by alternately laminating aerogel felt layers and closed-cell foaming rubber layers, and a connecting flange is fixedly arranged at the end part of the pipeline. Compared with the prior art, the composite heat preservation layer has the advantages that the composite heat preservation layer is formed by alternately stacking the aerogel felt layers and the closed-cell foaming rubber layers, heat loss in the heat energy conveying process is greatly reduced, and the energy utilization efficiency is improved; the vapor barrier layer is of a double-sided barrier structure formed by hot-pressing and compounding an aluminum foil layer and a polyethylene film, water vapor invasion is effectively prevented, the heat preservation layer is prevented from being affected with damp, the outer protective sleeve is provided with a rapid detection opening and a temperature and humidity sensor is arranged in the outer protective sleeve, real-time monitoring of the temperature, humidity and other states in the pipeline is achieved, and potential problems can be found and handled in time.

Description

TECHNICAL FIELD

[0001] The utility model relates to heating and ventilation pipeline device technical field, specifically point to a kind of heat preservation type heating and ventilation pipeline for heating and ventilation engineering. BACKGROUND

[0002] In modern architecture and industrial facilities, heating and ventilation system is the key facility to ensure indoor environmental comfort and process production demand, and heating and ventilation pipeline, as its core component, plays a decisive role in the efficient operation of the system.

[0003] At present, the heating and ventilation pipeline on the market generally adopts single-layer insulation structure, which has many defects that cannot be ignored. First, the thermal conductivity coefficient of its insulation material is relatively high, which leads to serious heat loss in the heat energy transmission process. According to relevant data, about 15-20% of energy is wasted in the transmission process, which not only causes great waste of energy, but also greatly increases the operating cost. Second, the traditional glass wool insulation layer is easily water-absorbed due to its own material properties. Once it gets wet, the insulation performance will decrease sharply, which will affect the operation effect of the whole heating and ventilation system. Third, the metal outer protective layer is easily condensed due to changes in environmental temperature and humidity during actual use, which may cause corrosion problems, shorten the service life of the pipeline, and even cause safety hazards and increase maintenance and replacement costs.

[0004] In summary, the existing heating and ventilation pipeline structure has been difficult to meet the requirements of energy efficient utilization and stable operation of the system in today's society, and there is an urgent need for a new type of heating and ventilation pipeline to solve the above problems and improve the comprehensive performance of the heating and ventilation system. CONTENT OF THE UTILITY MODEL

[0005] (I) TECHNICAL PROBLEM

[0006] The utility model provides a kind of heat preservation type heating and ventilation pipeline for heating and ventilation engineering with good heat preservation performance, strong moisture-proof durability, safety protection function, intelligent monitoring and stable structure.

[0007] (II) TECHNICAL CONTENT

[0008] To solve the above technical problems, the technical scheme of the utility model is as follows: a kind of heat preservation type heating and ventilation pipeline for heating and ventilation engineering, including inner conveying pipe, composite insulation layer, vapor barrier and outer protective sleeve fixed from inside to outside in sequence, the composite insulation layer is alternately stacked by aerogel felt layer and closed-cell foam rubber layer, and the pipeline end is fixedly provided with connecting flange, and the connecting flange is provided with annular sealing groove and embedded silicon rubber sealing ring on the butt joint surface.

[0009] Further, the thickness of the aerogel felt layer in the composite insulation layer is 3-5mm, and the thickness of the closed-cell foam rubber layer is 8-12mm, and at least 3 groups of stacked units are formed by alternately bonding the two through hot melt adhesive film.

[0010] Further, the vapor barrier layer is a double-sided barrier structure formed by hot pressing 0.2mm thick aluminum foil layer and 0.1mm polyethylene film, and the aluminum foil faces the composite thermal insulation layer.

[0011] Further, the outer protective sleeve comprises 0.5mm aluminized zinc steel pipe, 1.2mm polyurethane corrosion-resistant coating and 0.3mm ceramic silicone rubber fireproof layer fixed in sequence from outside to inside.

[0012] Further, the inner conveying pipe is provided with a dot matrix type protruding structure on the outer surface, the protruding height is 0.8-1.2mm, and the interval density is 15-20 / cm 2 .

[0013] Further, the outer protective sleeve is circumferentially and equidistantly provided with three groups of rapid detection ports, the rapid detection ports are screw-connected with cover plates, and the cover plates are internally fixed with temperature and humidity sensors.

[0014] (Three) technical effects

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] 1. The thermal insulation performance is significantly improved: the composite thermal insulation layer is composed of alternating layering of aerogel felt layer and closed-cell foamed rubber layer, the actual measurement of the thermal resistance value is increased by 40% compared with the traditional structure, the K value is ≤0.25W / m·K, and the heat loss in the heat energy conveying process is greatly reduced, and the energy utilization efficiency is improved.

[0017] 2. Moisture-proof and long durability: the vapor barrier layer adopts a double-sided barrier structure formed by hot pressing 0.2mm thick aluminum foil layer and 0.1mm polyethylene film, the water vapor permeability is <0.05g / (m 2 ·d), the water vapor is effectively prevented from entering, the thermal insulation layer is prevented from being damp, and the service life of the pipeline is prolonged to 25 years.

[0018] 3. Multiple safety protection: the 0.3mm ceramic silicone rubber fireproof layer in the outer protective sleeve can withstand 800℃ high temperature for 30 minutes, the 0.5mm aluminized zinc steel pipe is matched with the 1.2mm polyurethane corrosion-resistant coating, the corrosion-resistant grade reaches C5-M level, and the safety and stable operation of the pipeline in the fire and severe corrosion environment are comprehensively guaranteed.

[0019] 4. Intelligent monitoring and reduced maintenance cost: the outer protective sleeve is circumferentially and equidistantly provided with three groups of rapid detection ports and internally provided with temperature and humidity sensors, the real-time monitoring of the temperature and humidity and other states in the pipeline is realized, potential problems are found and handled in time, and compared with the traditional pipeline, the maintenance cost is reduced by 35%.

[0020] 5. The stability of the structure is enhanced: the dot-matrix protruding structure of the outer surface of the inner conveying pipe makes the bonding strength between layers increased by 60%, the shear resistance reaches 2.8MPa, the overall structural stability of the pipeline is effectively improved, and the complex installation and use environment is adapted. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a three-dimensional structural diagram of the heat preservation type heating and ventilation pipeline for heating and ventilation engineering Figure 1 .

[0022] Figure 2 is a three-dimensional structural diagram of the heat preservation type heating and ventilation pipeline for heating and ventilation engineering Figure 2 .

[0023] Figure 3 is a front view structural diagram of the heat preservation type heating and ventilation pipeline for heating and ventilation engineering.

[0024] Figure 4 is a left view structural diagram of the heat preservation type heating and ventilation pipeline for heating and ventilation engineering.

[0025] Figure 5 is a sectional view structural diagram of the heat preservation type heating and ventilation pipeline for heating and ventilation engineering.

[0026] Figure 6 is a structural diagram of the A area of the heat preservation type heating and ventilation pipeline for heating and ventilation engineering.

[0027] As shown in the figure: 1, the inner conveying pipe; 2, the composite heat preservation layer; 3, the steam separation layer; 4, the outer protective sleeve; 5, the connecting flange; 6, the rapid detection port; 51, the annular sealing groove; 52, the silicone rubber sealing ring; 21, the aerogel felt layer; 22, the closed cell foam rubber layer; 301, the aluminum foil layer; 302, the polyethylene film; 41, the aluminum-zinc coated steel pipe; 42, the polyurethane corrosion-resistant coating; 43, the ceramic silicone rubber fireproof layer; 11, the dot-matrix protruding structure; 61, the cover plate; 62, the temperature and humidity sensor. DETAILED DESCRIPTION

[0028] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation configuration and operation, therefore it cannot be understood as a limitation on the utility model.

[0029] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term "have", "installation", "link", "connection" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integral type connection, can be mechanical connection, also can be electrical connection, can be direct connection, also can pass through intermediate medium indirectly connect, can be two element inside communication. For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0030] The utility model makes further detailed description below in combination with the drawings.

[0031] Combination Figure 1 To the Figure 6 A heat insulation type heating and ventilation pipeline for heating and ventilation engineering, including inner conveying pipe 1, composite thermal insulation layer 2, steam barrier layer 3 and outer protective sleeve 4 that are sequentially fixed from inside to outside, the outer surface of inner conveying pipe 1 is equipped with dot matrix type convex structure 11, the convex height is 0.8-1.2mm, and the interval density is 15-20 / cm 2 , the composite thermal insulation layer 2 is formed by the alternate layering of aerogel felt layer 21 and closed-cell foam rubber layer 22, the thickness of aerogel felt layer 21 in the composite thermal insulation layer 2 is 3-5mm, the thickness of closed-cell foam rubber layer 22 is 8-12mm, and at least 3 groups of laminated units are formed by the alternate bonding of the two through hot melt adhesive film, the steam barrier layer 3 is a double-sided barrier structure formed by hot-pressing of 0.2mm aluminum foil layer 301 and 0.1mm polyethylene film 302, the aluminum foil faces the composite thermal insulation layer 2, and the outer protective sleeve 4 includes 0.5mm aluminum-zinc plated steel pipe 41, 1.2mm polyurethane anticorrosive coating 42 and 0.3mm ceramic silicone rubber fireproof layer 43 that are sequentially fixed from outside to inside, a connecting flange 5 is fixedly arranged at the end of the pipeline, an annular sealing groove 51 is arranged on the butt joint surface of the connecting flange 5 and embeds a silicone rubber sealing ring 52, the outer protective sleeve 4 is circumferentially and equidistantly provided with 3 groups of rapid detection openings 6, the rapid detection openings 6 are threadedly connected with cover plates 61, and the cover plates 61 are fixedly provided with temperature and humidity sensors 62.

[0032] The working principle of each hierarchical structure of the heat insulation type heating and ventilation pipeline for heating and ventilation engineering is described as follows:

[0033] When the heat insulation type heating and ventilation pipeline for heating and ventilation engineering works, the inner conveying pipe 1 is responsible for conveying heating and ventilation medium, such as hot water, steam and the like. The dot matrix type convex structure 11 on the outer surface of the inner conveying pipe 1 has an interval density of 15-20 / cm 2 , and a convex height of 0.8-1.2mm, so that the contact area and friction force with the composite thermal insulation layer 2 are increased, the bonding strength between the two is significantly enhanced, the stability of the hierarchical structure of the pipeline is ensured during the medium conveying process, and displacement or falling off of the pipeline is not easily caused, so that the stability of the overall structure is ensured.

[0034] The composite thermal insulation layer 2 is composed of at least three groups of aerogel felt layers 21 and closed-cell foam rubber layers 22 stacked alternately, the thickness of the aerogel felt layer 21 is 3-5 mm, the thickness of the closed-cell foam rubber layer 22 is 8-12 mm, and the two are bonded by a hot melt adhesive film. The aerogel felt has extremely low thermal conductivity, which can effectively prevent heat conduction, and the numerous closed pores of the closed-cell foam rubber layer can hinder air convection, and the two work together to greatly reduce the rate of heat loss from the inner conveying pipe 1 to the outside, thereby playing a good thermal insulation role.

[0035] The vapor barrier layer 3 is a double-sided barrier structure composed of a 0.2 mm thick aluminum foil layer 301 and a 0.1 mm thick polyethylene film 302 hot-pressed together, and the aluminum foil layer faces the composite thermal insulation layer 2. The aluminum foil layer has good water vapor barrier and heat radiation reflection capabilities, and the polyethylene film further enhances the water vapor permeation resistance, which can effectively block the intrusion of external water vapor into the composite thermal insulation layer 2, prevent the decline of thermal insulation performance caused by the entry of water vapor, and reduce the heat loss of the heat medium conveyed by the inner conveying pipe 1 in the form of radiation.

[0036] In the outer protective sleeve 4, the 0.5 mm aluminized zinc steel pipe 41 provides strong mechanical protection and enhances the pressure resistance and impact resistance of the pipeline; the 1.2 mm polyurethane corrosion-resistant coating 42 isolates the pipeline from external corrosive substances and prevents the aluminized zinc steel pipe 41 from rusting and corroding; the 0.3 mm ceramic silicone rubber fireproof layer 43 can withstand 800℃ high temperature for 30 minutes, and in the event of a fire or other special circumstances, it protects the internal structure from high temperature damage.

[0037] The connecting flange 5 at the end of the pipeline is used to connect with other pipelines or equipment, and the annular sealing groove 51 provided on the abutment surface is embedded with a silicone rubber sealing ring 52 to ensure that the connection is sealed well and prevents leakage of the medium. The three groups of quick detection ports 6 are arranged equidistantly in the circumferential direction of the outer protective sleeve 4, and the temperature and humidity sensors 62 fixed in the threaded cover plates 61 of the quick detection ports 6 can monitor the temperature and humidity inside the pipeline in real time. Once the temperature and humidity are abnormal, it can be fed back in time so that the staff can take appropriate measures to ensure the normal operation of the pipeline system.

[0038] The above describes the present application and its embodiments, which are not limiting, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired by this, without departing from the creative purpose of the present application, without creative design, similar structure and embodiments of the technical solution can be designed, which should belong to the protection scope of the present application.

Claims

1. A heat-insulating heating, ventilation, and air conditioning (HVAC) duct for a heating, ventilation, and air conditioning (HVAC) system, characterized by: It comprises an inner conveying pipe (1), a composite heat preservation layer (2), a steam barrier layer (3) and an outer protective sleeve (4) fixed in turn from inside to outside, the composite heat preservation layer (2) is composed of aerogel felt layer (21) and closed cell rubber layer (22) alternately stacked, the pipeline end is fixedly provided with a connecting flange (5), the connecting flange (5) is provided with an annular sealing groove (51) on the butt joint surface and embeds a silicone rubber sealing ring (52).

2. The thermal insulation type heating and ventilation duct for heating and ventilation engineering according to claim 1, characterized in that: The thickness of the aerogel felt layer (21) in the composite heat preservation layer (2) is 3-5mm, the thickness of the closed cell rubber layer (22) is 8-12mm, and the two are alternately bonded by a hot melt adhesive film to form at least three groups of stacked units.

3. The thermal insulation type heating and ventilation duct for heating and ventilation engineering according to claim 1, characterized in that: The steam barrier layer (3) is a double-sided barrier structure formed by hot pressing of a 0.2mm thick aluminum foil layer (301) and a 0.1mm thick polyethylene film (302), with the aluminum foil facing the composite heat preservation layer (2).

4. The thermal insulation type heating and ventilation duct for heating and ventilation engineering according to claim 1, characterized in that: The outer protective sleeve (4) comprises a 0.5mm galvanized aluminum zinc steel pipe (41), a 1.2mm polyurethane corrosion resistant coating (42) and a 0.3mm ceramic silicone rubber fireproof layer (43) fixed in turn from outside to inside.

5. The thermal insulation type heating and ventilation duct for heating and ventilation engineering according to claim 1, characterized in that: The inner conveying pipe (1) is provided with a dot array type protruding structure (11) on the outer surface, the protruding height is 0.8-1.2mm, and the interval density is 15-20 / cm 2 .

6. The thermal insulation type heating and ventilation duct for heating and ventilation engineering according to claim 1, characterized in that: The outer protective sleeve (4) is circumferentially equidistantly provided with three groups of rapid detection ports (6), and the rapid detection ports (6) are threadedly connected with cover plates (61).

7. The thermal insulation type heating and ventilation duct according to claim 6, characterized in that: The cover plate (61) is fixedly provided with a temperature and humidity sensor (62) inside.

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