RU48081U1 - EXPLOSION PROTECTED BUTTON KEY - Google Patents

Abstract

The utility model relates to electrical products, in particular to control posts, designed for remote control of machines and mechanisms in stationary conditions and by means of land, sea and air transport, where they are manually operated by the operator, as well as for signaling associated with the named electrical devices. The technical result that can be achieved using the proposed utility model is to reduce overall dimensions and weight, maintainability and reduce production costs due to the use of contact explosion-proof contact blocks with instant contact switching, whose own contact switching time is 0.04 seconds , as well as the fact that the blocks are attached to the lid by means of brackets, which reduces the mass of posts and facilitates the assembly of the lid with the housing and improves installation conditions. The post is repairable - if the switching device fails, it can be replaced during operation. As a result of the use of explosion-proof contact blocks in the posts, there is no need for an introductory compartment, since it is possible to enter the cable directly into the shell of the post, and the cable cores must be connected directly to the switch shell. The explosion-proof push-button control station consists of a housing 1 with a cover 2 connected by screws (not shown in Fig.), Cable entries 3, brackets 4, on which a switching element is installed, made in the form of an explosion-proof contact contact unit 5 enclosed in a shell that forms the housing 1, cover 2 and cable entries 3, while the bracket 4 is configured to prevent axial movement of the block 4, the STOP button 6 or the STOP and START buttons 7 or the STOP button 8,

"FORWARD" and "BACK", and button 6 or button 7 or button 8 is made in the form of a mushroom-shaped pusher and is equipped with a mechanism made with the possibility of fixation in the pressed state (not shown in Fig.), While the normally sparkling parts of the post are enclosed in a non-sealed the shell of the switching element, and not the sparking live parts, are enclosed in a flameproof enclosure of the post.

Description

Explosion-proof push-button control station Technical field to which the utility model belongs

The utility model relates to electrical products, in particular to control posts, designed for remote control of machines and mechanisms in stationary conditions and by means of land, sea and air transport, where they are manually operated by the operator, as well as for signaling associated with the named electrical devices.

State of the art

The well-known control posts of the PKE series, consisting of a housing with a cover, a switching element (see the brief reference "General industrial low-voltage equipment of mass series", Moscow, 1992)

The disadvantages of these posts are:

- low rated current, I _nom - 10 A;

- the impossibility of use in hazardous areas due to the low mechanical strength of the hull;

- normally sparkling parts are not enclosed in a flameproof enclosure;

- low degree of protection - IP40, IP54 on the part of control elements and due to the lack of cable entries, degree of protection - IP00 on the side of wiring installation.

Known push-button control posts of the PKU 15 series, designed for switching electrical control circuits

AC voltage of 220 V, consisting of a housing with a cover, cable entries, a switching element, making and breaking contacts, a pusher (see Push-button control posts of the PKU 15. OKP 342845 TU 16-526, 333-83. Kamenets - Podolsky Electromechanical Plant )

The disadvantage of these posts is the low switching current, large dimensions.

The closest in technical essence and the achieved positive effect, and adopted by the authors for the prototype is an explosion-proof control post (PUV), consisting of a housing with a cover connected by screws, cable entries, a switching element, the STOP button in the form of a mushroom-shaped pusher mounted on the cover or the “STOP” and “START” buttons or the “STOP”, “FORWARD”, and “BACK” buttons (see the catalog “Explosion-proof control posts of the PUV type. CJSC“ Donetsk Engineering Group ”, 83052, Donetsk, city, street 50 17th Guards Division, 17, tel./fax ( 062) 382-84-12, 382-89-77).

The disadvantages of this post are:

- low switching current I _nom - 10 A;

- large overall dimensions of 235 × 190 × 145 and, as a result, a large mass of the post.

Utility Model Disclosure

The technical result that can be achieved using the proposed utility model is to reduce overall dimensions and weight, maintainability and reduce production costs due to the use of contact explosion-proof contact blocks with instant contact switching, whose own contact switching time is 0.04 seconds , as well as the fact that the blocks are attached to the lid by means of brackets, which reduces the mass of posts and facilitates assembly

covers with the case and improves installation conditions. The post is repairable - if the switching device fails, it can be replaced during operation.

As a result of the use of explosion-proof contact blocks in the posts, there is no need for an introductory compartment, since it is possible to enter the cable directly into the shell of the post, and the cable cores must be connected directly to the switch shell.

The technical result is achieved using an explosion-proof push-button control station comprising a housing with a cover, screws, cable entries, a switching element, a STOP button or a STOP and START button or a STOP, FORWARD and BACK button made in the form of a mushroom-shaped pusher mounted on the lid, while the button in the form of a mushroom-shaped pusher is equipped with a mechanism made with the possibility of fixation in the pressed state, and the switching element in the form of a contact explosion-proof block enclosed in the shell, which is formed by the housing, the cover and cable entries and mounted on a bracket, the latter being configured to prevent axial movement of the block, while the normally sparking parts of the post are enclosed in an explosion-proof enclosure of the switching element, and not the sparking current-carrying parts are enclosed in an explosion-proof enclosure of the post.

Brief Description of the Drawings

Figure 1 shows the control post explosion-proof push-button (PUVK), General view.

In figure 2, too, a STOP button is installed on the lid.

In figure 3, too, on the lid is installed the button "STOP" and "START".

In figure 4, also, on the lid is installed the button "STOP", "FORWARD" and "BACK".

Utility Model Implementation

The explosion-proof push-button control station consists of a housing 1 with a cover 2 connected by screws (not shown in Fig.), Cable entries 3, brackets 4, on which a switching element is installed, made in the form of an explosion-proof contact contact unit 5 enclosed in a shell that forms the housing 1, cover 2 and cable entries 3, while the bracket 4 is configured to prevent axial movement of unit 4, button 6 “STOP” or button 7 “STOP” and “START” or button 8 “STOP”, “FORWARD” and “BACK ", And the button 6 or button 7 or button 8 is made in the form of a mushroom tappet and provided with a mechanism adapted to lock down state (Fig. not shown), the normal sparking of the post izryvonepronitsaemuyu enclosed in the shell of the switching element, and not the conductive portion sparking enclosed into flameproof post.

Explosion-proof control station is operated as follows.

When the operator presses button 6 “STOP” or button 7 “STOP” and “START” or button 8 “STOP”, “FORWARD” and “BACK”, the contacts of block 5 are switched, resulting in a signal to the mechanism drive via an electric circuit. When eliminating external influences from button 6 or button 7 or button 8 of the control post, all moving parts occupy the initial position, while the 5-pin block instantly switches contacts, whose own contact switching time is 0.04 seconds, the switching rated current is 16 A, which is Ex-component with explosion protection marking ExdeIU / ExdeIICU, the shell of which withstands the pressure of the explosion and eliminates the transfer of the explosion into the environment, while

containing normally sparking parts enclosed in the flameproof enclosure of the BKV unit 5, and not sparking current-carrying parts are enclosed in the post sheath, which allows the cable to enter the sheath of the post and connect the cable cores to the terminal clamps of unit 5 and use the post in hazardous areas.

Explosion-proof push-button control station has:

Explosion protection markings for ExdI, 1ExdIICT6, 1ExdIIBT6, 1ExdIIAT6:

- explosion protection level “1” or “RV” - “explosion-proof equipment”;

- types of explosion protection “d” - “flameproof enclosure”;

explosion protection mark 2ExedIICT6:

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

- types of explosion protection “d” - “flameproof enclosure”;

Explosion protection level “1” or “RV” - “explosion-proof electrical equipment” and type of protection “explosion-proof enclosure” (d) of the circuit breaker is provided by the following basic measures and means:

- the conclusion of normally sparking parts in flameproof enclosures of contact BKV blocks, made in accordance with the requirements of GOST R 51330.1-99;

- the conclusion of non-sparking live parts in the flameproof enclosure of the post, made in accordance with the requirements of GOST R 51330.1-99;

- explosion-proof shells of the contact block and the post have a high degree of protection against the danger of mechanical damage according to GOST R 51330.0-99, withstand the pressure of the explosion and exclude the transfer of the explosion into the environment;

- the implementation of contact electrical clamps in accordance with the requirements of GOST 10434-82;

- compliance of the electrical insulation of the product with level 1 according to GOST R 51330.20-99;

- the degree of protection of the shell from external influences IP65;

- limiting the heating of the outer parts of the shell post: temperature does not exceed 85 ° C;

- providing reliable cable sealing with an input device;

- the presence on the enclosure of explosion protection markings and the warning inscription "Open, unplugged from the network" on the cover.

- the presence of external and internal grounding clamps;

- corrosion protection of explosion-proof surfaces of the post shell. The proposed utility model in comparison with the prototype and other well-known technical solutions has the following advantages:

- increased reliability against explosion;

- a high degree of protection against the danger of mechanical damage;

- limiting the heating of the outer parts of the shell of the control post.

Claims (1)

An explosion-proof push-button control station containing a housing with a lid connected by screws, cable entries, a switching element, the STOP button, or the STOP and START buttons, or the STOP, FORWARD and BACK buttons, made in a mushroom-shaped pusher mounted on the lid, characterized in that the button in the form of a mushroom-shaped pusher is equipped with a mechanism made with the possibility of fixation in the pressed state, and the switching element is made in the form of a contact explosion-proof unit enclosed in a shell, which form a shell s, the cover and cable entries are mounted on a bracket, the latter being configured to prevent axial movement of the unit, while normally sparking parts of the post are enclosed in an explosion-proof enclosure of the switching element, and not sparking current-carrying parts are enclosed in an explosion-proof enclosure of the post.