RU138635U1 - PROTECTIVE CASE - Google Patents

Abstract

1. A protective cover made of antistatic and containing heating devices and a housing formed by walls equipped with quick-release fasteners with shells placed one in the other so that each of the walls includes at least three layers, the outer layer being chemically resistant with oil- and water-repellent properties, and the inner layer is made of heat-resistant and heat-reflecting material, while between the inner and outer layers a vibration-resistant insulation layer is freely placed flax either from a multilayer insulation provided with a double-sided adhesive connection of the layers, the layers being connected together with adhesive tape, or homogeneous, and the connections of the walls and quick-release fasteners are made using heat-resistant means of non-combustible and / or non-combustible materials, characterized in that the cover contains cooling devices with temperature controllers. 2. A protective case according to claim 1, characterized in that at least one wall comprises an opening for passing pipes, pipe elements and / or fittings. A protective cover according to claim 2, characterized in that the hole for passing the pipe, pipe elements and / or fittings is provided with a protective sleeve, the outer layer of the walls of which is made of the same material as the outer layer of the walls of the protective cover. A protective cover according to claim 1, characterized in that the outer wear-resistant layer is made of antistatic fabric impregnated with a protective composition, or is made antistatic of a material based on fiberglass, or made antistatic of a material based on fiberglass. The protective case according to claim 4,

Description

The utility model relates to the field of protection of technological instrumentation and other equipment from the effects of aggressive environmental influences and the exclusion of its various possible damages, namely, devices for protecting, heating and cooling instrumentation and automation devices, pipes, process apparatuses and their elements and / or to prevent freezing of pipe valves and / or process equipment installed on the pipeline, technological devices, on for example, measuring instruments such as sensors, flow meters, pressure gauges, etc., and can also be used as removable reusable thermal insulation in various industries to expand the temperature range of work and provide explosion protection for various types of equipment, including in hazardous areas.

From the prior art, a protective cover is known that is configured to accommodate stationary electrical and radio equipment, comprising a heating element, sandwich structures, implemented as a flexible woven electric heater, on both sides of which protective screens are made, made of two layers, including a heat shield fabric with various optical characteristics of the outer and inner sides and heat-insulating material, characterized in that the thermal sensor is installed inside the electrical and radio udovaniya with the additional administration visual indication of the operation status of the electric heater (see. RU 5707 U1, H05K 7/20, 27.09.2006). The disadvantage of its design is the lack of a solution to protect equipment located inside the case from overheating, which narrows the temperature range of the equipment.

Also known is a protective cover made of antistatic and representing a three-dimensional structure, having walls provided with quick-release fasteners, formed by shells placed one in the other so that each of the walls includes at least three layers - an external wear-resistant chemically resistant coating layer with water and oil repellent properties, the inner layer made of heat-resistant and heat-reflecting material, as well as the insulation layer located between them, made of vibration-resistant insulation, while the insulation layer is multilayer with adhesive bonding of its layers and freely placed between the inner and outer layers, which are interconnected, at least by adhesive tape, while the walls are connected to each other and the fasteners are connected to the walls using heat-resistant products from non-combustible and / or non-combustible materials (patent RU 90875 U1, F16L 59/00, publ. 20.01.2010). A well-known protective cover cannot cool the equipment inside. Explosion protection in a well-known protective case is ensured only by sealing and sealing.

The task to which this technical solution is directed is to create a convenient and easy to install protective device with an extended temperature range of use, providing both easy access for inspection, maintenance and climatic, as well as additional protection of the equipment from mechanical stress and, in addition, effective heat saving at low power consumption.

The technical result of the utility model is to increase the security of the equipment, due to the fact that the proposed protective cover provides for cooling of the equipment, and the explosion protection of the equipment can be increased due to the created overpressure inside the cover.

The protective cover is made antistatic and comprises a housing formed by walls equipped with quick-release fasteners with shells placed one in the other so that each wall includes at least three layers, the outer layer being chemically wear-resistant with oil and water repellent properties and the inner layer is made of heat-resistant and heat-reflecting material, while between the inner and outer layers a vibration-resistant insulation layer is freely placed, made of either multilayer a heater equipped with a double-sided adhesive connection of the layers, or homogeneous, the layers being connected together by adhesive tape, and the connections of the walls and quick disconnect fasteners are made using heat-resistant means of non-combustible and / or non-combustible materials, while the cover contains heating and cooling devices with temperature controllers .

One wall contains an opening for the passage of pipes, pipeline elements and / or fittings.

The hole for the passage of the pipe, pipe elements and / or fittings may be provided with a protective sleeve, the outer layer of the walls of which is made of the same material as the outer layer of the walls of the protective cover.

The external wear-resistant layer is made of antistatic fabric impregnated with a protective composition or made of antistatic material based on fiberglass or made of antistatic material based on fiberglass.

The outer wear-resistant layer of antistatic fabric or fiberglass is impregnated with oil - water-repellent and / or fluoroplastic and / or silicone.

The insulation layer is made of mineral fiber or airgel or foam rubber.

The inner layer is made of fluoropolymer impregnated from fabric or, preferably, fiberglass.

The reflection coefficient of the radiant component of the generated heat in the outer and inner layer is greater than that of the insulation layer.

Mounts are made in the form of Velcro and / or rivets and / or belts with D-rings.

As heat-resistant products from non-combustible and / or non-supportive materials, Rusar and / or Kevlar threads were taken.

The layers of the walls of the protective cover are sewn with non-combustible and / or non-burning threads from Kevlar and / or Rusar.

The case is equipped with marking plates to identify equipment installation locations.

As heating devices, cable, or infrared, or water and steam heaters with temperature controllers located in pockets formed in the insulation layer are taken.

The case is equipped with fasteners for fixing the elements of the heating devices.

Elements of heating devices are made of composite heating fabric and are equipped with temperature sensors that prevent overheating or overcooling of the surface.

The cover is equipped with heating elements in the form of a self-regulating heating cable located between the insulating and inner layers of the walls or fixed along the inner layer and fixed by means of loops formed by belts over the entire area of the walls.

The case is equipped with at least one special cable entry, which can be made in the wall and connected externally via a junction box to the power source, mainly 220 V.

The protective cover is equipped with cooling devices with thermostats. The operation of the cooling device can be based on the principle of operation of the Rank-Hilsch tube. As the refrigerant used "air instrumentation", which is necessary for the operation of instrumentation. Air under pressure is supplied to the cooling device, made in the form of a Rank-Hilsch tube. The air cooled after passing through the device remains inside the cover. Leaving with some resistance through a special valve, it creates excessive pressure inside the cover. By adjusting the resistance of the air to the valve, a slight excess pressure can be created inside the cover. In this case, the heated air is discharged outside the cover without any resistance. To control the overpressure inside the cover, the valve can be equipped with a pressure gauge. Filling or purging the enclosure under overpressure with protective gas (in this case, air) is a type of explosion protection intended for use in potentially explosive gas environments in which for the safe operation of electrical equipment:

shielding gas is maintained at a pressure higher than the pressure in the external environment and is used to protect against the formation of explosive gas mixtures in shells that do not contain an internal source of leakage of flammable gas or vapor;

the protective gas is supplied in an amount sufficient to ensure that the resulting concentration of the explosive gas (vapor) mixture around the electrical component is outside the upper and lower explosive limits in accordance with the operating conditions. This is used to prevent the formation of explosive mixtures inside shells containing one or more internal sources of leakage.

This type of protection is used for:

establishing overpressure for explosion protection of type px: Increase in pressure, which changes the classification of the explosive zone inside the shell under pressure from zone 1 or zone of group 1 to non-explosive zone;

establishment of overpressure for explosion protection of the form py: pressure increase, changing the classification of the explosive zone inside the shell under pressure from zone 1 to zone 2;

establishment of overpressure for explosion protection type pz: An increase in pressure that changes the classification of the hazardous area inside the enclosure under pressure from zone 2 to non-explosive.

Air or an inert gas is used to purge and maintain excess pressure, and if necessary, to dilute flammable substances inside the shell.

The high pressure method is based on the idea of separating the surrounding atmosphere from electrical equipment. This method does not allow a dangerous mixture of air and gas to pass through a shell containing electrical parts that can produce sparks or have dangerous temperatures. The shielding gas (air or inert gas) contained inside the shell is at a pressure higher than the pressure of the external atmosphere.

The internal pressure drop is kept constant, both in the case of a constant flow of protective gas, and without it. The shell must have a certain strength, but no special mechanical requirements are presented, because the supported pressure difference is not very high.

To maintain the pressure difference, the shielding gas supply system must be able to compensate for its loss due to leakage from the envelope or due to personnel access.

The utility model assumes the creation of a compact, convenient and easy-to-use protective device for transportation and installation with an extended temperature range of application (from -70 ° to + 200 ° C), which provides at the same time reliable protection against atmospheric precipitation, condensation, and protection from thermal influences, including the number of overheating, icing, hypothermia, fire and sound absorption with noise reduction up to 25D6, as well as providing easy access to equipment for inspection, control and maintenance of the pipeline and installation Nogo its equipment that affects the long period of its operation while reducing labor costs for these operations and reducing energy costs and the replacement and repair costs of expensive equipment, to provide a device, non-toxic and safe for staff through the use of environmentally friendly materials; allowing reuse due to the existing ability to maintain its shape for a long time, as well as meeting the requirements for placement in hazardous areas.

The claimed solution is illustrated by the following graphic materials that do not cover, and even more so do not limit, the entire scope of the claims of this technical solution:

Figure 1 - diagram of a cooling device operating on the principle of Rank-Hills;

Figure 2 - embodiment of a protective cover.

In the figures of the drawing indicated:

1 - thermal case;

2 - insulation;

3 - non-combustible Velcro tape;

4 - self-regulating heating cable;

5 - grounding stud assembly;

6 - rubber cable entry;

7 - explosion-proof cable entry;

8 - power cable in the metal hose;

9 - junction box;

10 - input sleeve armored cable;

11 - viewing window;

12 - marking plate;

13 - heated device;

14 - inner layer;

15 is the outer layer.

The protective cover is made antistatic and is a three-dimensional structure formed by shells placed one in another and having walls. The walls contain three layers - an external wear-resistant, chemically resistant coating layer with water and oil repellent properties, a warming layer made of vibration-proof insulation, and an inner layer made of heat-resistant and heat-reflecting material. The layers are arranged relative to each other according to the “Matryoshka” principle (case in a case). In this case, the insulating layer is made multilayer with adhesive bonding of its layers or homogeneous and freely placed between the inner and outer layer (not sewn with the walls of the inner and outer layer), and the inner and outer layers are interconnected by adhesive tape, which eliminates the need for firmware thick enough cover walls (thickness of three layers from 25 to 40 mm).

The walls are interconnected using heat-resistant means of non-combustible and / or non-combustible materials, for example, Rusar threads. In one of the walls of the protective cover there is one hole for the passage of the pipe, pipe elements and / or fittings.

In addition, the hole for the passage of pipes, pipeline elements and / or fittings can be equipped with a protective sleeve, the outer layer of the walls of which can be made of the same material as the outer wear-resistant coating layer of the walls of the protective cover.

The external wear-resistant coating layer may consist of an antistatic fabric or incorporate an antistatic fabric impregnated with a protective composition and / or may be made of fiberglass-based material with a wide temperature range of application, while the wear-resistant coating layer may be chemically resistant and have water - and oil repellent properties. In addition, it can be made of an antistatic material and / or based on fiberglass and, preferably, includes metal threads, mainly located in the layer in the form of a mesh. In some versions, the external wear-resistant coating layer may be made of an oil-repellent chemically resistant fabric and / or impregnated with an oil-repellent composition. Also, the outer wear-resistant coating layer can be made water-repellent from a water-repellent fabric and / or impregnated with a water-repellent composition. It is possible that it is made of fiberglass or woven material, mainly fiberglass, and is impregnated with fluoroplastic and / or silicone.

The insulation layer may be made of mineral fiber, airgel or foam rubber, and the inner layer may be made of fabric, preferably impregnated with fluoroplastic, preferably fiberglass.

The external wear-resistant coating and / or inner layer may have a high ability to reflect the radiant component of the generated heat in comparison with the insulation layer.

Non-combustible or non-burning quick-release fasteners can be made in the form of rivets, Velcro, belts with D-shaped rings.

The protective cover can be equipped with identification plates to identify the installation locations of the equipment.

The protective cover can be equipped with heating elements such as cable, infrared, water and steam heaters. The protective cover can be equipped with heating elements made of composite heating fabric, equipped with temperature controllers (temperature sensors) that prevent overheating and overcooling of the surface (not shown in the drawings). The composite heating fabric is the basis of the heating element. The heat transfer plane is the entire surface of the heater. This plane can be of any configuration and any size. A variant of this heating element has long been used in Russia for space and military purposes. As a result of using this heater, the entire inner surface of the cover or the target zone (in the area of the valve seat, electronics, sensors, in the measuring section) is a heater. Heaters are intended for independent automatic and continuous maintenance of the set temperature inside a cover. This type of heaters can be used in hazardous areas in which the formation of explosive mixtures of gases and vapors of flammable liquids with air is possible.

An example of cable heating of a protective cover is the heating of elements made in the form of a self-regulating heating cable located between the insulation and the inner layers of the walls or on the inner layer and secured by loops formed by belts over the entire area of the walls (not shown in the drawings). The cable is placed between the insulation layer and the inner layer and fixed using special straps (not shown in the drawings) located throughout the heating area. The belts are sewn so that loops are formed through which the cable is passed. To connect the heating cable of the case, a special cable entry can be made, which is connected externally via the junction box to the power source, mainly 220 V. Unlike the resistive cable, the self-regulating cable is used without a temperature controller and is connected directly to the 220 V power supply (in the junction box) box). The heating cable is used with a maximum operating temperature on the surface of + 65 ° C, the power of which can be up to ZbW / m. Due to the fact that even at positive temperatures the heating cable does not have zero resistance, it consumes electricity. In order to reduce energy consumption, they use an external temperature control sensor. The ability of self-regulation makes it possible to overlap the cable, while hot spots and zones of local overheating are not formed. Since the cable independently controls the heat output, this limits the maximum temperature of the heated equipment and, at the same time, provides the necessary power to maintain its temperature.

If the protective cover is supplied with water and steam heaters, the protective cover is connected by the consumer to the heat supply system with water temperature up to plus 95 ° C and pressure up to 0.6 MPa (6 kg / cm) or with steam temperature up to plus 135-200 ° C .

If necessary, the cover can be equipped with a cooling device operating on the basis of the Rank-Hilsch tube. For its operation, you can use instrumentation air, which is present at industrial facilities. This will allow cooling equipment located inside the cover 25-30 degrees below the temperature supplied to the instrument air cooler.

A protective cover is intended, for example, to accommodate technological, instrumentation, electrical and radio equipment: manifolds and instrumentation, solenoid valves, process fittings, communication equipment. A protective cover is installed in open areas and indoors, including in hazardous areas. The protective cover can be applied on any equipment, including with the most complex geometric shapes, which allows it to be used on flanges, heat exchangers, manholes, turbines and other complex components and assemblies. The use of regular maintenance, inspection or repair of technological equipment in the field allows achieving savings that are impossible with the use of other insulating materials. The cover can be easily dismantled and quickly reinstalled, which saves time and material costs for the above operations.

Claims (18)

1. A protective cover made of antistatic and containing heating devices and a housing formed by walls equipped with quick-release fasteners with shells placed one in the other so that each of the walls includes at least three layers, the outer layer being chemically resistant with oil- and water-repellent properties, and the inner layer is made of heat-resistant and heat-reflecting material, while between the inner and outer layers a vibration-resistant insulation layer is freely placed flax either from a multilayer insulation provided with a double-sided adhesive connection of the layers, the layers being connected together with adhesive tape, or homogeneous, and the connections of the walls and quick-release fasteners are made using heat-resistant means of non-combustible and / or non-combustible materials, characterized in that the cover contains cooling devices with temperature regulators. 2. The protective cover according to claim 1, characterized in that at least one wall contains an opening for the passage of pipes, pipe elements and / or fittings. 3. The protective cover according to claim 2, characterized in that the hole for the passage of the pipe, pipe elements and / or fittings is equipped with a protective sleeve, the outer layer of the walls of which is made of the same material as the outer layer of the walls of the protective cover. 4. The protective case according to claim 1, characterized in that the external wear-resistant layer is made of antistatic fabric impregnated with a protective composition, or made of antistatic material based on fiberglass, or made of antistatic material based on fiberglass. 5. A protective case according to claim 4, characterized in that the outer wear-resistant layer of antistatic fabric or fiberglass is impregnated with an oil-repellent composition and / or fluoroplastic and / or silicone. 6. A protective case according to claim 1, characterized in that the insulation layer is made of mineral fiber, or airgel, or foamed rubber. 7. The protective case according to claim 1, characterized in that the inner layer is made of a fluoropolymer impregnated from fabric or preferably fiberglass. 8. The protective case according to claim 1, characterized in that the reflection coefficient of the radiant component of the generated heat in the outer and inner layers is greater than that of the insulation layer. 9. A protective case according to claim 1, characterized in that the fasteners are made in the form of Velcro and / or rivets and / or belts with D-shaped rings. 10. A protective case according to claim 1, characterized in that the threads of Rusar and / or Kevlar are taken as heat-resistant means from non-combustible and / or non-supportive materials. 11. The protective cover according to claim 1, characterized in that the wall layers of the protective cover are sewn with non-combustible and / or non-burning threads from Kevlar and / or Rusar. 12. The protective case according to claim 1, characterized in that it is equipped with marking plates to identify the installation sites of the equipment. 13. A protective case according to claim 1, characterized in that cable or infrared or water and steam heaters with temperature controllers located in pockets formed in the insulation layer are taken as heating devices. 14. The protective case according to claim 1, characterized in that it is equipped with fasteners for fixing the elements of the heating devices. 15. A protective case according to claim 1, characterized in that the elements of the heating devices are made of composite heating fabric and are equipped with temperature sensors that prevent overheating or overcooling of the surface. 16. The protective cover according to claim 1, characterized in that it is equipped with heating elements in the form of a self-regulating heating cable located between the insulating and inner layers of the walls or fixed along the inner layer and fixed by means of loops formed by belts over the entire area of the walls. 17. The protective case according to claim 1, characterized in that it is equipped with a cooling device operating on the principle of the Rank-Hilsch tube. 18. A protective case according to claim 1, characterized in that it is provided with at least one special cable entry, which can be made in the wall and connected externally via a junction box to the power source, mainly 220 V.

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