RU49380U1 - PROTECTIVE CONTAINER FOR INSTALLATION OF CONTROL AND MEASURING EQUIPMENT - Google Patents

Abstract

The utility model relates to the means of protection of instrumentation and automation used in industrial plants from the effects of adverse environmental conditions, including low temperatures in the winter, as well as from the effects of aggressive gases and vapors contained in the atmosphere of enterprises.

The protective container consists of a base (1) and a lid (2), the cases of which have an inner layer of slow-burning polyurethane foam, as well as an inner and outer shell of slow-burning and chemically stable fiberglass; equipped with metal hinges (3) securing the cover and base, a spacer (7) to keep the cover open and side locks (6). Along the perimeter of the lid adjacent to the base, a seal made of elastic chemically stable and frost-resistant material is fixed in two rows.

The inner heat-insulating layer completely fills the space between the inner and outer shells of the elements of the device due to the fact that the synthesis of polyurethane foam is carried out directly in this space.

Rectangular recesses (9) are made on the faces of the base and cover, which provide the possibility of installing, if necessary, inspection windows.

Description

The utility model relates to the means of protection of instrumentation and automation used in industrial plants from the effects of adverse environmental conditions, including low temperatures in the winter, as well as from the effects of aggressive gases and vapors contained in the atmosphere of enterprises.

A known method of thermal protection of apparatus and pipelines using multilayer thermal insulation according to the patent of the Russian Federation No. 2016348, F 16 L 59/00, made in the form of a package of the base and alternating layers of discrete heat-insulating elements, in which the base layers are made of alternating layers of fiberglass, stitched in pairs parallel seams in intersecting directions, and metal foil, and the insulating elements are made of highly porous ceramics.

Such multilayer thermal insulation can provide thermal protection of any volumes, however, significant difficulties will arise when sealing a structure with its use.

There is also a method of protecting existing electronic equipment from environmental influences, namely, that the board with the specified equipment is installed in a housing that contains at least two layers of tear-resistant plastic located on opposite sides of the metal barrier, after which the board is sealed inside specified body. In this case, the housing is made in the form of a multilayer structure in which each of the layers of plastic, in turn, contains the outer and inner layers, the first of which is made of polyethylene, and the second is made of polyamide or polyester (application for invention of the Russian Federation No. 96121569/09 , H 05 K 5 / 06.1999 g.).

The layered structure is also used in the implementation of the method of environmental protection of airborne information storage devices installed on aircraft (Mikhailov OI and other Aircraft Instruments and Flight Navigation Systems. Leningrad, OLAG, 1990, pp. 54-56 ) According to this method, an emergency information storage device is installed in a ball heat-insulating container of a layered structure having three shells - shockproof and two heat-insulating.

A known method of thermal protection, a layered structure for its implementation and a protective housing from it (RF patent No. 2162189. F 16 L 59/02, 2001). Invention

refers to the means of protecting internal volumes for various purposes. The structure and the protective housing contain at least three layers in series. The outer layer is shockproof and fireproof. The intermediate layer is made of dry refractory porous-fibrous material, and the inner layer is made of porous-fibrous material impregnated with a water-containing component. The thermal protection method includes creating an internal protected volume and forming a protective barrier around it from a layered structure around it.

The above applications of layered structures can be used to protect internal volumes from external influences, however, the described devices are not suitable for accommodating existing instrumentation in them that require periodic inspection and verification of their operability.

A protective cover for measuring equipment is described in the European patent (EA 4835, Н 02 В 1/28, 2004). It consists of two identical trough-like elements made of fiberglass plastic (preferably polyester), which are mounted vertically and connected to each other using hinges. Closed casing sealing is achieved with locks.

Also known is a protective device suitable for placing measuring equipment in it - a sealed enclosure for electronic circuit boards (application for invention of the Russian Federation No. 2002128691/09, N 05 K 5/06, 2004). The housing contains a base and a cover made of a thermoplastic polymer material (polybutylene terephthalate) and hermetically connected to each other by means of locking elements.

Both recent developments do not involve equipping protective devices with thermal insulation.

The closest in technical essence to the claimed device (prototype) is a protective cabinet for the installation of instrumentation (certificate for utility model of the Russian Federation No. 34843, 7 N 05 K 5/06, 2003). The protective cabinet consists of two parts - the base and the cover with a layer of thermal insulation applied to their internal surfaces. A fiberglass layer is molded to the inner surface of the insulation layer. The cover is made with a sealed surface.

The patented utility model solves the problem of ensuring reliable and long-term operation of instrumentation and automation of technological processes in a wide temperature range (from + 50 ° С to -50 ° С) of an environment containing chemically aggressive gases and vapors, due to

the use of chemically resistant materials, as well as effective thermal insulation and tightness of the structure.

The utility model is illustrated by drawings, which show a view of a container with an open lid (Figure 1), and also shows the design of the lid and the type of seal in an enlarged scale (Figure 2).

The protective container for instrumentation is a cube with a side of 640 mm, diagonally divided into two parts - the base (1) and the lid (2), fastened in the upper part with metal hinges (3). The base and cover of the same size are made in the form of a “sandwich construction” and have an inner and outer shell (4) made of chemically resistant refractory fiberglass. A layer of thermal insulation (5) made of slow-burning polyurethane foam is enclosed between the shells. The container is equipped with side locks (6) and a spacer (7).

The main differences of this utility model from the prototype are as follows:

- to ensure the tightness of the container in a closed state along the perimeter of the lid adjacent to the base, a double seal (8) made of an elastic frost-resistant and chemically stable material is fixed;

- to enable monitoring of equipment installed in a closed container on the rear wall of the base and the upper edge of the lid, rectangular recesses (9) with a refined wall are provided for inserting inspection windows;

- the efficiency of thermal insulation of the inner volume of the container is due to the uniform filling of the space between the inner and outer shells by the foam due to the synthesis of polyurethane foam from the starting ingredients directly in this space during the formation of covers and bases.

A useful model is as follows.

On two matrices, the outer and inner fiberglass shells of the base and the lid of the container are formed in a contact manner. The hardened outer shell is placed in a foaming matrix, the inner shell is placed on top and a liquid mixture of ingredients for the synthesis of polyurethane foam is introduced into the space between the shells. The second matrix is pressed from above and the endurance necessary to complete the synthesis of the evolved gases under pressure

hardening of the resulting foam. Remove the upper matrix, remove the product (base or cover) and subject it to mechanical processing and painting. If necessary, a wall is cut along the perimeter of the recess and glass is inserted into the hole formed, conducting appropriate sealing. Next, install the necessary metal parts, fix the seal around the perimeter of the lid and connect the base and lid of the container.

Instruments are placed in a protective container ready for use. To maintain the required temperature, it is possible to install heating elements inside the container.

All necessary mounting holes are performed at the installation site.

Claims (3)

1. Protective container for the installation of instrumentation, consisting of a base and a cover, the cases of which have an inner layer of slow-burning polyurethane foam, as well as an inner and outer shell of slow-burning and chemically stable fiberglass, equipped with metal hinges that fasten the lid and base, a spacer for holding the lid open and with side locks, characterized in that around the perimeter of the lid adjacent to the base, a seal made of elastic corr ozone-resistant and frost-resistant material. 2. The protective container according to claim 1, characterized in that the inner heat-insulating layer completely fills the space between the inner and outer shells of the elements of the device due to the fact that the synthesis of polyurethane foam is carried out directly in this space. 3. The protective container according to claim 1 or 2, characterized in that rectangular recesses are made on the faces of the base and lid, which make it possible to install, if necessary, viewing windows.