RU135837U1 - EXPLOSION DEVICE FOR PROTECTING EQUIPMENT - Google Patents

Abstract

1. An explosion-proof device for protecting equipment, comprising interconnected housing and a cover, characterized in that it contains fasteners, holes for pipes and / or cables, sealed with a sealant, at least one heating element made with the possibility of thermoregulation, this case and the cover are formed by bonded with each other outer and inner shells made of fiberglass reinforced based on slow-burning resin and containing heat-insulating material, and the shells are coated with insulating paint from the inside, and the body and cover have a flange at the edges, between which the sealant is placed. 2. An explosion-proof device for protecting equipment according to claim 1, characterized in that the heat-insulating material contains needle-punched glass wool and / or basalt fiber and / or mineral wool and / or closed-cell polyurethane foam. 3. Explosion-proof device for protecting equipment according to claim 1, characterized in that the heating element is connected to an external power source. Explosion-proof device for protecting equipment according to claim 1, characterized in that the surface resistance of the outer surfaces of the housing and the cover is less than 10 GOhm. Explosion-proof device for protecting equipment according to claim 1, characterized in that the housing and the cover are pivotally interconnected, and access to the internal cavity is limited by locking elements. Explosion-proof device for protecting equipment according to claim 1, characterized in that the housing contains holes for condensate drainage, equipped with plugs placed in the inner strip�

Description

The utility model relates to the field of protection of technological, instrumentation and other equipment from environmental influences and the exclusion of its various possible damages, namely, devices for heating and / or preventing freezing of technological equipment, for example, measuring devices such as sensors, flow meters, manometers etc., and can also be used as removable reusable thermal insulation in various industries to expand the temperature range p boats of various types of equipment.

Known cabinet for instrumentation (RU 44911 U1, IPC H05K 5/00, published March 27, 2005), comprising a housing consisting of two interconnected parts, according to the proposed solution, the housing contains an external and an internal wall, a connection of the housing parts made detachable, in the opposite walls of the housing of each part of the cabinet there are recesses that form when connecting the parts of the cabinet of the window to ensure that it can be placed on the pipeline, while parts of the cabinet are connected by fastening elements.

Known protective cabinet for the installation of instrumentation, (RU 34843 U1, IPC H05K 5/06, publ. 10.12.2003), taken by the authors as the closest analogue. The protective cabinet consists of two parts - the base and the cover with a layer of thermal insulation applied to their inner surfaces, interconnected by hinges, shutters and a backup, characterized in that the cover is made with a sealed surface that covers the base of the cabinet around the perimeter of their connection, while a fiberglass layer is molded onto the inner surface of the thermal insulation layer of the lid and base.

A disadvantage of the known devices is the lack of security of the equipment located in the devices, and more specifically, the insufficiently wide range of external temperatures suitable for the operation of protected equipment, due to the passive thermal insulation used in the devices, and the absence of any explosion protection.

The objective of the utility model is to create a protective device with advanced functionality to protect equipment from external influences with the possibility of installing the device, for example, on a pipeline, or in the immediate vicinity of the pipeline, as well as in places where the use of measuring or technological equipment characterized by aggressive environmental influences .

The technical result consists in expanding the functionality of protective equipment, due to the introduction of heating and explosion protection elements into the device design, which provide increased protection of the equipment from external influences, such as negative temperatures, fire and explosion.

An explosion-proof device for protecting equipment includes dust-proof, moisture-proof housing and a lid made with an internal cavity for accommodating technological equipment, made with a tight fit to the housing, made in the housing and the lid to provide the necessary dust-, moisture-proof openings for passing pipes coming from the pipeline or cables from sensors placed outside the device to equipment inside the device, device mounting elements placed in the internal cavity, as well as at least , one, made with the possibility of thermoregulation, a heating element connected to an external power source via an electric cable through a cable entry, moreover, the housing and the cover are multilayer. Structurally, they consist of two fiberglass shells (external and internal, Fig. 1, positions 1, 2, 3, 4), each of them with a thickness of about 3 mm. Depending on the conditions of use of the higher education institution (explosion-proof device for protecting equipment), the wall thickness can be increased. These shells are made of fiberglass-reinforced plastic based on slow-burning resin. On the inner shell of the case, due to its high strength, it is possible to fasten a variety of technological and control equipment. The surface resistance of the outer surfaces of the shell and lid shells is reduced to less than 10 GΩ using a special technology of adding additives to resins and gelcoat. The surface of the device becomes antistatic and this allows the device to be used in the presence of explosive gas mixtures in the surrounding atmosphere. Between the outer and inner fiberglass shells is placed a heat-insulating material (figure 1, pos.6). The main and most effective material used in the device is needle-punched glass wool, basalt fiber, mineral wool or closed-cell polyurethane foam. These materials give the device thermal insulation efficiency. The multilayer structure of the case and the cover of the device give it high rigidity and strength. The optimal thickness of the multilayer walls of the housing and the cover of the device is from 30 to 40 mm. Larger thickness will increase the weight of the device. In the case of using the product in conditions of very low ambient temperatures, in this design, unlike the previous ones, additional insulation of the inner and outer fiberglass shells of the housing and the cover of the device is applied by applying a special heat-insulating coating on their inner surface (the one that contacts the heat-insulating layer) paint (Fig. 1, item 7). The use of paint on the inner layer dramatically increases the thermal insulation characteristics of the device. In this case, the heat-insulating paint remains inside the sandwich and does not come in contact with the environment, which increases its service life. Also, the application of heat-insulating paint on the inner surfaces of the fiberglass shells of the housing and the cover of the device will allow them to maintain the antistatic properties of their outer surfaces, achieved in this device by the use of special additives in the production of shells. The housing and the lid are hinged together at one edge, while access to the internal cavity is limited by locking elements placed on the lid and the housing. Another distinctive feature of this design is a more snug fit of the cover to the body. It is achieved by manufacturing on the lid and body of the device special flanging (figure 1, position 5). This design, together with the use of a sealant (Fig. 1, pos. 8), provides greater protection of the internal cavity of the device from the ingress of dust and moisture.

Condensate drain holes may be provided in the housing, provided with plugs placed in the internal cavity of the device.

The device can be equipped with at least one earth outlet, as well as additional cable entries for connecting to the external power source of the technological equipment located in it, for connecting the technological equipment to the measurement objects through electric cables or tubes through which the technological equipment will be a working medium is supplied, the parameters of which must be measured. These cable entries can be explosion proof.

To ensure connection to an external power source, the device can be equipped with a sealed junction box mounted on a mounting plate located on the inside of the case.

The housing and the cover can be interconnected via a loop connection, for example, in the form of a piano loop.

The device may contain at least one, and preferably two gas pistons, each of which, with one end mounted on the housing, and the other on the cover.

The device may be equipped with at least one electronic temperature controller located in the internal cavity of the device and connected to the heating element.

The heating element can be made in the form of separate insulated plates or elements representing a heating fabric made of electrically conductive carbon-containing fibers, creating a continuous heating layer when voltage is applied to them and equipped with a temperature sensor and a thermostat to provide the required temperature range in the internal cavity of the device.

In another embodiment, the heating element can be made convection explosion-proof in the form of a filled compound and enclosed between two mechanically tightened radiators of the heating element and equipped with an electronic temperature controller.

In addition, the heating element can be made in the form of a self-regulating cable, which is two conductive conductors isolated from each other, placed in a semiconductor carbon matrix enclosed in a plastic sheath, a copper braid and a polyolefin or fluoroplastic sheath placed on the mounting elements or frame in the form lattice.

To provide additional physical protection for the equipment installed in the device due to the implementation of the locking elements on the lid and the housing, as well as the placement of the fastening elements of the equipment in the internal cavity with a high degree of vandal resistance, which increases the service life of the equipment placed in the device, the maintenance of which is facilitated by the articulation connection on one edge of the case and the cover of the device.

The invention is illustrated by the figures of the drawings, which depict:

figure 2 is a General view of an explosion-proof device for protecting equipment in a perspective view;

An explosion-proof device for protecting technological equipment includes an internal cavity for accommodating technological equipment (Fig. 2, Item 1); dust-, moisture-proof housing (Fig. 2, item 2) and a cover (Fig. 2, item 3). The cover (figure 2, position 3) is made with the possibility of tight fit to the body of figure 2, position 2). In the case (Fig. 2, Pos. 2) and the cover (Fig. 2, Pos. 3), inputs (Fig. 2, Pos. 4) are made for passing tubes (Fig. 2, Pos. 5) and cables (Fig. 2, pos. 6) coming from the pipeline or external sensors with the necessary dust and moisture protection, for which the inlets (Fig. 2, pos. 4) are equipped with seals for sealing the places of entry and exit of tubes and cables. Also, in the internal cavity of the device, preferably in its housing (FIG. 2, item 2), at least one thermally controlled heating element is located (FIG. 2, item 7). The heating element is connected to an external power source through an electric cable (figure 2, position 8) through the cable entry (figure 2, position 9). The body (Fig. 2, pos. 2) and the cover (Fig. 2, pos. 3) are multilayer with a layer of explosion and fireproof non-combustible heat-insulating material, for example, closed-cell polyurethane foam, needle-punched glass wool, mineral wool or basalt fiber, and external and internal a layer of durable flame-retardant antistatic corrosion-resistant explosion-proof material, for example, fiberglass reinforced fiberglass. The housing and the cover are interconnected pivotally on one edge. In addition, the casing and the lid can be equipped with an additional layer of thermal insulation, made by applying heat-insulating paint to the inner surface, which is adjacent to the insulation, fiberglass shell and lid. Access to the internal cavity is limited by locking elements (Fig. 2, pos. 18) located on the lid and housing.

In the bottom of the body (figure 2, position 2) can be made holes for drainage of condensate (not shown), equipped with plugs, placed in the internal cavity of the device.

Inspection windows can be made in the lid (FIG. 2, item 10) for taking readings from technological equipment located inside the device without opening the lid. To minimize heat loss, viewing windows can be made of double-glazed windows with one or more cameras.

The device is equipped with at least one earth outlet (Fig. 2, item 11), as well as additional cable entries (Fig. 2, item 12) for connecting to an external power source of technological equipment (Fig. 2, item 1 ) Cable entries are explosion-proof.

To ensure connection to an external power source of the heating element (figure 2, item 7) and process equipment (figure 2, item 1), the device is equipped with a sealed junction box (figure 2, item 13) located on the inside of the device . The power cable of the heating element (Fig. 2, pos. 8) and the power cable of technological equipment (Fig. 2, pos. 14), as well as cables from external sensors (Fig. 2, pos. 6) are suitable for the junction box.

To ensure dust and moisture protection of the connection between the cover and the housing, they (or one of them) are equipped with a two-handed seal (Fig. 2, item 15) in the place of their snug fit to each other. The double-handed seal may be made of silicone or neoprene.

To enhance protection against ingress of dust, moisture and precipitation, the housing and the cover can be flanged around the perimeter of their abutment to each other (Fig. 1, item 5). For ease of maintenance, the housing and the lid can be pivotally interconnected along one edge, preferably by means of a loop connection, for example, in the form of a piano loop (figure 2, item 16). While the device may contain at least one, and preferably two gas pistons (figure 2, pos.17). Each gas piston is fixed at one end to the body and the other at the lid.

The heating element in different types of device performance can be selected from the following.

The heating element can be made in the form of separate insulated plates or elements representing a heating fabric made of electrically conductive carbon-containing fibers, creating a continuous heating layer when electric voltage is applied to them and equipped with a temperature sensor and an electronic temperature regulator to provide the required temperature range in the internal cavity of the device, which determined by the appropriate temperature setting (for example, at + 20С), which is set in the factory x

In another embodiment, the heating element can be made convection explosion-proof in the form of a filled compound and enclosed between two mechanically tightened radiators of the heating element and equipped with an electronic temperature controller. The principle of operation of the heating element is to generate heat during the passage of electric current through the heating element and maintain it at a given temperature by means of an electronic temperature controller.

According to the requirements of explosion protection, the absence of overheating of any element of the heater above the permissible temperature corresponding to this temperature class must be guaranteed. For this, a temperature sensor is placed that limits the heating temperature. There are three principal types of temperature sensors: bimetallic relays, capillary sensors, and digital sensors. A bimetallic relay is applied on the surface of the heater, and controls the temperature on the surface of the heater. The advantage of a bimetallic relay is low cost, the disadvantage is low regulation accuracy, and also the relay has a finite number of operation cycles. Digital and capillary sensors provide regulation with an accuracy of 1 degree. It is possible to use dual-circuit temperature control. The sensor of the first circuit measures the temperature on the surface of the heater, the second (main) measures the temperature inside the volume. The organization of the third circuit is possible taking into account the external temperature. A multi-circuit temperature control circuit provides a high degree of protection against overheating, the accuracy of maintaining a given temperature level and high energy efficiency, since the heater operates in the most economical mode. With any type of temperature control on the surface of the heater there is an emergency fuse temperature fuse. The temperature sensor regulates the supply of electricity to the heating elements.

In addition, the heating element can be made in the form of a self-regulating heating cable, which is two conductive conductors (parallel busbars) isolated from each other, placed in a semiconductor carbon matrix enclosed in a plastic sheath, a copper braid and a polyolefin or fluoroplastic sheath placed on mounting elements or frame in the form of a lattice. Parallel busbars provide voltage along the entire cable length. The semiconductor carbon matrix is a continuous heating element, thus allowing you to cut the cable anywhere, eliminating the appearance of dead and cold zones. A cable acquires its self-regulating properties due to the properties of a semiconductor carbon matrix. As the temperature of the material of the semiconductor carbon matrix increases, the number of local conductive bonds in it decreases, automatically reducing heat generation. With decreasing temperature, the number of local conductive bonds increases, leading to an increase in heat release. This happens at every point along the length of the cable, so the output power depends on the environmental conditions along the length of the pipeline. 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 inside the device, and at the same time provides the necessary power to maintain the temperature in it.

The heating element is located in the inside of the device. An electric cable (Fig. 2, pos. 8) of power from the heating element (Fig. 2, pos. 7) is connected through an explosion-proof connection terminal box (Fig. 2, pos. 13) to an external power source through a cable that is output from the housing devices through an explosion-proof cable entry (figure 2, item 9).

It is also possible to use a coil made of a tube of small diameter and placed inside the housing and cover as a heating element. Steam is supplied to the installed coil if there is a source at the industrial facility where the device is installed.

The device operates as follows. Explosion-proof device for equipment protection (HUS) is placed near the pipeline or other areas where there is a need to protect the used measuring or other technological equipment, on special fasteners. Technological equipment (figure 2, position 1) is placed in the inner cavity of the dust-, moisture-proof housing (figure 2, position 2) and the cover (figure 2, position 3). The lid fits snugly to the body, and the inputs (figure 2, position 4) for the passage of tubes (figure 2, position 5) and cables (figure 2, position 6) provide the necessary dust and moisture protection. Through the tubes (figure 2, item 5) to the technological equipment located inside the device, the medium comes from the main pipeline through which this medium is transported. The tubes can be made with thermal insulation and have a heating cable, similar to that used inside this device (see description above), to protect the environment inside the tubes from the temperature effects of the environment. By cables (Fig.2, pos.6) to the technological equipment located inside the device, electrical signals can come from sensors located outside the device and in contact with the measured media. Made with the possibility of thermoregulation, the heating element (Fig. 2, pos. 7) is connected to an external power source by means of an electric cable (Fig. 2, pos. 8) through a cable entry (Fig. 2, pos. 9). An electric current is supplied, as a result of which the temperature rises in the internal cavity of the device due to the operation of the heating element (the principle of operation of the heating elements that can be used in the claimed technical solution is described above). At the same time, effective heat saving is ensured due to the case and cover being multilayer, with a layer of explosion and fireproof non-combustible heat-insulating material and outer and inner layers of durable non-combustible antistatic corrosion-resistant explosion-proof material. Operational maintenance of technological equipment is facilitated by performing the connection of the cover and the body hinged along one edge, as well as through the use of viewing windows (figure 2, position 10). Access to the internal cavity is limited by locking elements (Fig. 2, pos. 18) located on the lid and housing.

Thus, the claimed utility model makes it possible to create a durable explosion-proof and fireproof device that provides effective heat saving with low power consumption, as well as a high degree of vandal proof, climate and additional physical protection of technological equipment located inside the device, increasing the service life of the equipment placed in it, when using open air (ambient temperature range from minus 70 to plus 60 ° C), when exposed to direct sunlight, precipitation (rain, snow), condensation, icing, under wind loads, including during the cold season, as well as the harmful effects of dust.

Claims (11)

1. An explosion-proof device for protecting equipment, comprising interconnected housing and a cover, characterized in that it contains fasteners, holes for pipes and / or cables, sealed with a sealant, at least one heating element made with the possibility of thermoregulation, this case and the cover are formed by bonded with each other outer and inner shells made of fiberglass reinforced based on slow-burning resin and containing heat-insulating material, and the shells are coated from the inside with heat-insulating paint, and the body and cover are flanged at the edges, between which the sealant is placed. 2. An explosion-proof device for protecting equipment according to claim 1, characterized in that the heat-insulating material contains needle-punched glass wool and / or basalt fiber, and / or mineral wool, and / or closed-cell polyurethane foam. 3. An explosion-proof device for protecting equipment according to claim 1, characterized in that the heating element is connected to an external power source. 4. An explosion-proof device for protecting equipment according to claim 1, characterized in that the surface resistance of the outer surfaces of the housing and the cover is less than 10 GOhm. 5. An explosion-proof device for protecting equipment according to claim 1, characterized in that the housing and the cover are pivotally interconnected, and access to the internal cavity is limited by locking elements. 6. Explosion-proof device for protecting equipment according to claim 1, characterized in that the housing contains holes for draining the condensate, equipped with plugs placed in the internal cavity of the device. 7. An explosion-proof device for protecting equipment according to claim 1, characterized in that it contains at least one earth outlet and additional cable entries for connecting the equipment located in the device to an external power source. 8. An explosion-proof device for protecting equipment according to claim 1, characterized in that it contains a sealed junction box for connecting the device to an external power source. 9. An explosion-proof device for protecting equipment according to claim 1, characterized in that it comprises at least one gas piston and at least one temperature controller. 10. Explosion-proof device for protecting equipment according to claim 1, characterized in that the lid contains at least one inspection window made of a double-glazed window containing at least one camera. 11. Explosion-proof device for protecting equipment according to claim 1, characterized in that the seal located in the flanging is made of double-strand silicone or neoprene.

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