RU2516050C2 - Heat insulation method for sliding shutter - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention refers to heat insulation of main and process oil pipelines and oil product pipelines, namely, to the method of heat insulation of a sliding shutter. Heat insulation method for the sliding shutter involves design and manufacturing of a heat insulation structure from foam glass with a protective cover taking into account the geometric dimensions and peculiarities of the sliding shutter design; at that the heat insulation structure comprises two or more parts being connected by locks which provide for the access to the sliding shutter for maintenance and repair; the seams of the heat insulation structure are sealed by sealing gaskets from foamed rubber and the inner surface of a heat insulation product contacting with the sliding shutter is coated with antiabrasive material to protect its anticorrosion coating.

EFFECT: use of the proposed device provides for heat insulation of the sliding shutter with the usage of fire safe materials and for the access to it for its maintenance and repair.

2 cl, 2 dwg, 1 tbl

Description

The invention relates to thermal insulation of trunk and process pipelines and oil pipelines, and in particular to a method of thermal insulation of a slide gate valve.

Known inventions for various thermal insulation structures of equipment, including also a description of the methods of its application.

The invention is known "Thermal insulation design" (see patent RU No. 40433U8 of 09/10/2004, IPC F16L 59/00), in which the thermal insulation structure is made collapsible, including removable shells fastened with bandages. The segments are combined in a structure that forms a heat-insulating shell around the pipeline and consists of N sectors, interconnected in a diametrical direction into a lock. The bandages are made in the form of tightening tapes secured by a lingering device equipped with a stopper.

The disadvantage of the method of applying this design is the lack of quick-detachable segments and, accordingly, the lack of convenient access to the equipment for its maintenance and repair.

The invention is known "Quick-detachable thermal insulation" (see patent RU No. 2259510 C1 dated 08/27/2005, F16L 59/10), which presents a quick-detachable thermal insulation, which is a set of frame mounted on tie braces along the insulating surface and repeating its profile block elements, each of which contains a protective metal shell, a heat-insulating layer and fasteners.

The disadvantage of the method of applying this design also lies in the absence of quick-detachable block elements and, accordingly, in the absence of convenient access to equipment for its maintenance and repair.

Closest to the proposed technical solution is the method of installing thermal insulation of the mechanical and technological equipment of oil pipelines described in the Aeroflex Installation Guide (developed by Alfa-Invest Management Company LLC, 2010, 20 pp., Www.aeroflex-russia.ru) . The thermal insulation technology of the valves includes determining its geometrical dimensions (measuring the external diameters of the pipe, flanges and the valve itself), applying measured dimensions to Aeroflex sheet or roll material, cutting thermal insulation elements from Aeroflex material, isolating the valve using Aerotape heat-insulating tape, applying glue to glued surfaces heat-insulating elements and their gluing.

However, this method is not applicable in the field, including difficult climatic conditions (technologically complicated and time-consuming), does not protect the equipment from external influences and does not provide access to the protected equipment for its maintenance and repair.

The objective of the invention is to provide protection of equipment from external influences, installation of thermal insulation of the slide gate valve using fireproof materials while providing access for its maintenance and repair.

The technical result that can be obtained by implementing the present method is expressed in the creation of a gate valve, protected from external influences, fireproof thermal insulation, providing the possibility of its maintenance and repair.

The technical result is achieved by installing a heat-insulating layer of non-combustible material and using removable structural elements that provide access to the slide gate valve for its maintenance and repair.

In this case, the method of thermal insulation of the slide gate valve according to the invention is that the heat-insulating structure is designed and made of foam glass with a protective shell individually for the design of the slide gate valve, taking into account its geometric dimensions and design features, and the thermal insulation is attached to the inner surface of the protective shell using mastic, this heat-insulating structure contains two or more parts that are connected using locks, which provides access to the slide gate For maintenance and repair, sealing the joints of the heat-insulating structure is carried out using foam rubber gaskets, and an anti-abrasive is applied to the inner surface of the heat-insulating structure in contact with the gate valve to protect it from corrosion.

Installing a heat-insulating structure includes installing a non-removable thermal insulation (for the bottom of the gate valves), which is mounted in the factory, and a collapsible thermal insulation, which is mounted in the field.

The application of the method is illustrated by the device shown in the drawings of figures 1 and 2.

Figure 1 shows a diagram of the device, and figure 2 - fastening of structural parts using locks.

The drawings show thermal insulation 1, sealing gasket 2, protective shell 3, non-removable thermal insulation of the bottom 4, mastic 5, fastening elements (metal ties 6 with locks 7, bolts with nuts, self-tapping screws, etc.).

The thermal insulation device for the slide gate valve is individually designed and manufactured for each slide gate valve 8 individually, taking into account the geometric dimensions of the equipment, design features, type of connection to the pipeline (welded, flanged), and installation method (on the foundation, without foundation).

The thermal insulation device of the slide gate valve is a protective shell, to the inner surface of which a non-combustible thermal insulation material is attached using mastic.

The materials used as a protective shell protect the thermal insulation from environmental influences, from mechanical damage, and are also an element of thermal insulation fastening.

When placed above ground, the protective shell of the thermal insulation of the slide gate valve is made of galvanized sheet steel with a thickness of 1.0 mm.

For underground installation, the protective shell of the thermal insulation of the slide gate valve serves to strengthen the surface of the foam glass and is made of mastic and reinforcing material.

Thermal insulation is attached to the inner surface of the protective shell using mastic.

The casing structure is divided into two or more parts, the joints between which are sealed with gaskets. The shape of the casing (rectangular or shaped) is determined taking into account the dimensions of the equipment during design.

Parts are fastened using fasteners (metal ties with locks, bolts with nuts, self-tapping screws, etc.). This provides access to the gate valve for its maintenance and repair.

Work.

The thermal insulation device for the slide gate valve provides for work in the factory and in the field.

In factory conditions, non-removable thermal insulation of its bottom is manufactured and mounted on a valve, and also folding elements of thermal insulation are manufactured. The thermal insulation is attached to the inner surface of the protective shell using mastic.

In the field, collapsible heat-insulating elements are mounted on the gate valve, the joints between which are sealed with foam rubber gaskets.

With a high content of oil vapor in the internal volume of the insulating structure, a gas analyzer and a pipe for purging it are installed inside the box.

The carried out experimental design work in the LLC “NII TNN” showed that it is advisable to use non-combustible heat-insulating materials based on foam glass - foam glass as thermal insulation.

Acceptable for the proposed device, the technical characteristics of the foam glass are shown in table 1.

Table 1 Technical characteristics of foam glass Name of indicator Indicator value 1 Density, kg / m ³ 110-180 2 Compressive strength at 10% deformation, MPa, not less 0.70 3 Thermal conductivity at a temperature of 25 ° C, W / (m · K), no more 0.05 4 Water absorption in 24 hours,% by volume, no more 2,5 5 Combustibility group non-combustible

The thickness of the insulation of the slide gate valve is determined on the basis of thermal engineering calculations (see TR 12310-TI.2006. Foam glass insulation products in the construction of thermal insulation of equipment and pipelines. Severspetskomplekt LLC, M. - 2006).

The elements of the device are fixed using metal ties with locks, bolts with nuts, self-tapping screws, etc.

An anti-abrasive is applied to the inner surface of the thermal insulation in contact with the gate valve, which protects the anti-corrosion coating of the valve.

Before installing the heat-insulating structure, the surface of the slide gate valve must be dried, cleaned of dirt, dust, ice, moisture and other contaminants. In case of adverse conditions (snow or rain), insulation works should be carried out in tents.

The application of the proposed device provides thermal insulation of the gate valve using fireproof materials with access for its maintenance and repair.

Claims (2)

1. A method of thermal insulation of a slide gate valve, including determining its geometrical dimensions, characterized in that the heat-insulating structure is designed and made of foam glass with a protective shell individually for the slide gate structure, taking into account its geometrical dimensions and design features, and the thermal insulation is attached to the inner surface of the protective shell when using mastic, while the heat-insulating structure contains two or more parts that are connected with locks, which ensures access to the gate valve for maintenance and repair, sealing the joints of the heat-insulating structure is performed using foam rubber gaskets, and anti-corrosion is applied to the inner surface of the insulation in contact with the gate valve to protect it against corrosion. 2. The method according to claim 1, characterized in that the installation of the heat-insulating structure includes the installation of non-removable thermal insulation (for the bottom of the gate valves), which is mounted in the factory, and a collapsible thermal insulation, which is mounted in the field.

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