RU48679U1 - EXPLOSION-PROTECTIVE LAB - Google Patents

Abstract

The utility model relates to electrical products, in particular to electrical energy distribution panels in lighting networks and can be used for operation in hazardous areas according to the “Electrical Installation Rules” (PUE), chapter 7.3 “Electrical Installations in Explosive Areas”, GOST R 51330.9 and others regulatory documents that determine the applicability of electrical equipment in hazardous areas. The technical result that can be obtained using the proposed utility model is to reduce the size and weight, high mechanical strength, withstand the pressure of the explosion and prevent the transfer of the explosion into the environment. Explosion-proof lighting panel consisting of assembled basic modules: connecting module 1, disconnector module 2, linear module 3. Each basic module consists of a housing 4 and a cover 5, interconnected by screws (not numbered in Fig.). In the shell of the linear module 3 there are single-pole circuit breakers 6, three machines each, enclosed in their own explosion-proof casing 7, in the shell of the module 2 of the disconnector three-pole circuit-breakers 8, one machine each, enclosed in their own explosion-proof casing 7, are located in the shell of the linear module 3 and protective 10 zero busbars and internal ground clamps (not numbered in Fig.), electrically connected to external ground clamps 11. In the shell of the connecting m Module 1 includes a terminal block 12 or terminal block 13 for connecting external

conductors (not shown in FIG.). On the shells of the linear modules 3 and the connecting module 1 are cable entries 14, 15 for inputting external cables (not shown in Fig.).

Description

The technical field to which the utility model relates.

The utility model relates to electrical products, in particular to electrical energy distribution panels in lighting networks and can be used for operation in hazardous areas according to the “Electrical Installation Rules” (PUE), chapter 7.3 “Electrical Installations in Explosive Areas”, GOST R 51330.9 and others regulatory documents that determine the applicability of electrical equipment in hazardous areas.

State of the art

Known switchboard containing a frame, busbars, wire and a set of terminals, while the busbars are arranged in horizontal rows (packets) with insulating spacers between them and a power source is connected to each busbar, and flexible wires located perpendicular to the busbar, one end with the clamps are attached to each bus, and the second through the terminals to each current collector (see as. S. USSR No. 184309, class. H 02 V 1/20).

The disadvantage of this shield is the large size and weight, the inability to withstand the pressure of the explosion and the exclusion of the transfer of the explosion into the environment.

A standard explosion-proof switchgear for electric heating systems is known, including a 4-pin linear switch, 2-pin automatic fuse, C - character, cable and line entries (see "Explosion-proof electrical equipment", Cooper Crouse-Hinds / CEAG, Houston, USA).

The disadvantage of this device is the large size.

The closest in technical essence and the achieved positive effect and adopted by the authors for the prototype is an explosion-proof lighting plate containing the base modules - connecting, linear with single-pole circuit breakers of three circuit breakers, a disconnector with a three-pole circuit breaker of one circuit breaker, each basic module consists of enclosures and covers interconnected by screws (see. Explosion-proof lighting guards of type ЩОВ - 1А. Operation manual PINU. 6565 17.001 RE. Zelenokumsk, 2003).

Its disadvantages are large dimensions, a welded steel structure and, as a result, a large mass of 105 kg, as well as the fact that three-pole circuit breakers are enclosed in an explosion-proof enclosure of the disconnector, and single-pole circuit breakers are enclosed in an explosion-proof enclosure of the main body, while separating the input device, disconnector, the main body and the output device are separated by flameproof partitions and are connected to each other through passage clamps.

Utility Model Disclosure

The technical result that can be obtained using the proposed utility model is to reduce the size and weight, high mechanical strength, withstand the pressure of the explosion and prevent the transfer of the explosion into the environment.

The technical result is achieved using an explosion-proof lighting plate containing basic modules - connecting, linear with single-pole circuit breakers of three circuit breakers, a disconnector with a three-pole circuit breaker of one circuit breaker, with each basic module consisting of a housing and

covers interconnected by screws, while the shell of the linear module with single-pole circuit breakers of three machines each and the shell of the disconnector module with three-pole circuit breakers of one machine each is made with the possibility of enclosing in its own explosion-proof shell, and the working and protective zero tires are located in the shell of the linear module and internal ground clamps connected to external ground clamps, the terminal block and the presses for connecting external conductors, and linear membranes and connecting modules arranged cable connections for input of external cables.

Brief Description of the Drawings

Figure 1 is given a flap lighting explosion-proof, General view. Figure 2, the same, General view, a section along aa.

Utility Model Implementation

Explosion-proof lighting panel consisting of assembled basic modules: connecting module 1, disconnector module 2, linear module 3. Each basic module consists of a housing 4 and a cover 5, interconnected by screws (not numbered in Fig.). In the shell of the linear module 3 there are single-pole circuit breakers 6 of three circuit breakers enclosed in their own explosion-proof casing 7, and in the shell of the module 2 of the disconnector three-pole circuit breakers 8 of one circuit-breaker enclosed in their own explosion-proof casing 7 are placed.

In the shell of the linear module 3 there are working 9 and protective 10 zero buses and internal grounding clamps (in Fig. Not

are numbered), electrically connected to the external ground clamps 11. In the shell of the connecting module 1 are located terminal block 12 or the block of contact clamps 13 for connecting external conductors (not shown in Fig.). On the shells of the linear modules 3 and the connecting module 1 are cable entries 14, 15 for inputting external cables (not shown in Fig.).

Explosion-proof lighting shield is operated as follows.

On the covers 5 of the linear modules 3 and the disconnector module 2, there are covers (not shown in FIG.) That cover the control bracket (not shown in FIG.) With single-pole and three-pole circuit breakers 6 and 8. To perform the operation of turning on “B” or turning off “О "Unscrew the screw, open the cover 5 and perform the operation" B "or" O ", while in the window of the cover on the control bracket appears" ON "or" OFF ", then close the cover 5 and tighten the screw.

The shields can be equipped with linear modules 3 with single-pole circuit breakers 6 in an amount of 3 to 12 with combined releases (not shown in Fig.) For a rated current of 16A and cable entries 14, 15 for sealing cables with an outer diameter of 10 mm to 24 mm and a disconnector module 2 with a three-pole circuit breaker 8 with a combined release (not shown in FIG.) for a rated current of 25A and 63A.

Explosion protection is achieved by the fact that the shields have:

- explosion protection level - “increased reliability against explosion” (2);

- types of explosion protection - “flameproof enclosure” (d) and type “e” protection;

- explosion protection marking 2ExedIICT4 X, where the separate sign “X” indicates special conditions for the safe use of shields.

Explosion protection level “increased reliability against explosion” (2) and types of explosion protection “flameproof enclosure” (d) and protection type “e” of the shield are achieved:

By enclosing normally sparking parts of circuit breakers 6, 8 in their own flameproof enclosure corresponding to an explosion-proof level of explosion protection.

By the conclusion of non-sparking live parts, as well as circuit breakers 6, 8 enclosed in their own flameproof enclosure made of premix DMC-20-OPMA TU 2253-013-00204961-01, which has a high degree of protection against the risk of mechanical damage according to GOST R 51330.0 and degree of protection against external influences IP65 according to GOST 14254;

The strength of the flameproof enclosure of circuit breakers 6, 8 according to GOST R 51330.1. The flameproof enclosure of b, 8 circuit breakers has a high degree of protection against the danger of mechanical damage. Each part of the flameproof enclosure (housing 4 and cover 5) is checked during hydraulic tests by an excess pressure of 1.0 MPa for the duration required for inspection, but not less than 10 seconds. In accordance with GOST R 51330.1.

- Explosion-proof casing of circuit breakers 6, 8, which is ensured by the use of slotted explosion protection. In Fig. Explosion protection (Fig.2) shows the mating parts of the shell, providing crevice explosion protection. These mates are indicated by the word “Explosion” indicating the explosion protection parameters allowed by GOST R 51330.1: maximum gap widths and minimum gap lengths and roughness of the abutment surfaces forming flameproof gaps.

Mechanical damage to explosion-proof surfaces is not allowed.

The mobile explosion-proof surfaces of the rollers are protected against corrosion by a galvanic coating and during assembly are coated with TsIATIM-201 GOST 6267 grease.

Degree of protection against external influences IP65 indicated on the shells of the shields and achieved by the seals:

- at the interface between modules 1, 2, 3;

- at the interface between the cases 4 and covers 5 of the modules 1, 2, 3;

- in the places of connection of cable entries 14, 15;

- O-rings of cable entries 14.15.

- The design of the electrical contact clamps 13, which comply with GOST 10434, GOST R 51330.0, GOST R 51330.8 and exclude pressure transmission through the insulating material and have elements from self-unscrewing.

The insulating parts of the terminal block 13, terminal block 12 and the cases of circuit breakers 6, 8 are made of tracking materials. Creepage distances and electrical clearances correspond to the values specified by GOST R 51330.8;

- Limiting the maximum temperature of contact joints under normal operating conditions, which do not exceed 80 ° C;

- Limiting the temperature of the outer surface of the shield, which in normal operation does not exceed 135 ° C, which is allowed by GOST R 51330.0 for electrical equipment of temperature class T4, taking into account the maximum ambient temperature;

- A limitation on the axial movement of the rollers of the inclusion of circuit breakers 6, 8 on one side with a bracket, and on the other hand-lead mechanism (in Fig. Not shown).

- The presence of special screws. which prevent the opening of the shells without a special tool (not shown in FIG.) and are protected from self-unscrewing using spring washers and locknuts (not shown in FIG.);

- The presence on the covers of 5 modules 1, 2, 3 warning signs "open, unplugged from the network";

- The presence on the shell of the inner shields (not shown in Fig.) And external grounding clamps made in accordance with GOST 21130.

The proposed utility model in comparison with the prototype and other well-known technical solutions has the following advantages:

- high mechanical strength;

- withstanding explosion pressure;

- the exclusion of the transfer of the explosion into the environment;

- small dimensions and weight.

Claims (1)

Explosion-proof lighting panel, consisting of basic modules: a connecting module, a disconnecting module, a linear module and without a lead compartment, characterized in that the circuit breakers of the disconnecting module and linear modules are enclosed in their own flameproof enclosures made of thermosetting material and having high mechanical strength, withstanding the pressure of the explosion and excluding the transfer of the explosion into the environment, and the shell of the modules made of antistatic m material, perform the functions of the outer shell and excretory compartment.