RU1795218C - Process unity safety device - Google Patents

Abstract

Usage: protection of service personnel from getting into the danger zone. Technological equipment. SUMMARY OF THE INVENTION: The protective device comprises enclosing sections mounted in rails with the possibility of reciprocating movement, a switch connected to the control system. To increase the reliability of protection, it is equipped with two-arm rotary levers and two parallel rods rigidly mounted on the shoulders of the two-arm levers with the possibility of interaction with the switch. In the enclosing sections there are grooves directed towards each other and forming holes. Stops are attached to the rod closest to the enclosing sections. The stops have the ability to fit into the formed openings. 1 silt

Description

The invention relates to mechanical engineering and can be used to protect service personnel from getting into the danger zone of technological equipment.

Known protective fence containing a rod enclosing a hazardous area, mounted using an axis on the bed of the machine and a micro switch that is triggered by pressing the rod.

However, this device does not provide reliable protection for service personnel at wide hazardous areas of technological units and is unacceptable on equipment with high dust emission. where shelter is required.

The closest in technical essence and the achieved result to the claimed one is the protective enclosure of the technological unit, consisting of separate sections (doors), docked with each other, moved along rectilinear guides and equipped with an electric lock made on end switches included into the control circuit of the unit.

However, due to the large number of limit switches, spontaneous shutdowns occur during operation of the unit due to vibration of the guard and loose fit of its sections. This causes machine downtime and reduces

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labor productivity. Another disadvantage of the device is the low reliability of protection of the device due to the fact that the unit shuts down when the sections are opened only after the section is shifted by a certain distance sufficient to operate the switch, reducing this distance leads to the appearance of false trips of the switch. . . ,

The purpose of the invention is to increase the reliability of protection and increase productivity.

The goal is achieved. that in the protective device of the technological unit containing enclosing sections moving along rectilinear guides mounted on the bed of the unit, the switch connected to the control system uses rods rigidly connected to each other by means of double arms, mounted parallel to the rectilinear guides with a switch, while the rods are mounted with the possibility of rotation about an axis parallel to the guides, and in the enclosing sections, slots and the closest rod are made The bottom has stops for entering the slots.

The installation of two rigidly connected to each other by means of two shoulders levers, rods with stops and enclosing sections moving along rectilinear guides. provide reliable protection against human entry into a working unit. At the same time, the unit is switched off when the first hinge is pressed, even before the opening of the enclosing doors begins. And when the unit is running, reliable mechanical locking is provided, which prohibits the opening of the enclosing sections. The set of essential distinguishing features, which consists in the possibility of the rod interacting with the enclosing sections, in contrast to the prototype, which contains limit switches according to the number of enclosing sections, eliminates false positives of electrical blocking due to vibration, as there is no contact of the switch with the sections, and also provides tripping unit before beginning to open sections.

The drawing shows a protective device, a General view in a perspective view.

The protective device of the technological unit contains installed on the bed 1 of the technological unit by means of rectilinear guides 2 enclosing sections 3, made in the form of doors with slots 4. The first rod

5 is connected by means of two-arm levers G. mounted rotatably on the frame 1, with a second shaft 7, which has stops 8 for entering the slots A, and

interacts with switch 9.

The device is shown in the operating position, the enclosing sections 3 are closed, the rods 5 and 7 are rotated so that the stops 8 enter the slots 4, and the switch 9 is locked with

drive technology unit.

The protective device operates as follows ..:

When opening the protective device during operation of the unit, press the first shaft 5, while the two-arm lever

6 rotates and moves the second rod 7 and the stops 8 connected to the rod 7, at the same time the rod 7 turns off the switch 9, the unit turns off and the guard is not unlocked. In this case, it becomes possible to open the enclosing sections 3 by moving them along a straight line. The inclusion of the unit with the doors open is excluded, since the slots 4 are offset relative to the stops 8, which makes it impossible to move the rod 7 to turn on the switch 9.

Thus, the implementation of the protective

devices in the form of enclosing sections with slots moving along rectilinear guides from the system of rods, levers and stops connected to the switch, improves the reliability of the protective device, improves safety conditions and provides a lock from two to ten sections using one switch, which also eliminates spontaneous shutdowns due to section vibration and increases labor productivity.

Claims (1)

The claims The protective device of the technological unit, comprising at least two enclosing sections mounted in rectilinear guides fixed to the unit bed with the possibility of reciprocating movement and sliding of one section to another, a switch connected to the control system, characterized in that In order to increase the reliability of protection while increasing productivity, it is equipped with two-arm rotary levers placed on a bed, the axis of rotation of which is parallel to the straight line directing guides parallel to each other and rectilinear guiding rods / located between deuplech levers and rigidly mounted on the shoulders of the latter with the ability to interact with the switch mounted on the stops closest to the enclosing section of the rod, while grooves are made in the enclosing sections directed towards each other and forming holes for receiving stops therein;