RU41715U1 - CONTROL CRANE FOR TWO-START DEVICE - Google Patents

Abstract

The control valve for a two-armed device belongs to the field of mechanical engineering and can be used in conjunction with another pneumatic distributor, normally open in the initial position, as a device providing the use of both hands of the operator to control the pneumatic cylinders when securing workpieces in machine tools, in order to ensure safe operation of the operator . To achieve this goal, a latch and a spring for returning the latch are installed in the body of the control valve, and two openings are made in the spool for the lug to engage, the location of which corresponds to the two extreme positions of the spool, while the spool is connected to the body by a torsion spring, which ensures the spool returns to its original position the lack of pressure in the cavity of the control valve and the force removed from the handle of the crane. The use of such devices for two-armed inclusion allows you to completely eliminate the possibility of injury to the operator when securing the workpiece in machine tools.

Description

The control valve for a two-armed device belongs to the field of engineering and can be used in conjunction with another manual control valve, normally open in the initial position, as a device that allows the operator to use both hands to control the pneumatic cylinders when securing workpieces in machine tools, in order to excluding the possibility of injury to the operator.

Known pneumatic valve for two-armed inclusion, containing a plate with channels for supplying and discharging compressed air and, ground to its surface, a flat spool installed in the housing with the ability to turn the handle through the head and roller of the crane, with one hand of the operator and a fixing handle for the second hand of the operator , (see Inform leaflet No. 629-75, Gorky Central Scientific Research Institute of 01/23/76 g, Working drawings No. 75-1753-011).

The known design of a pneumatic valve for two-handed operation, with constantly applied pressure to the valve, allows you to control the working cylinders with one hand of the operator when blocking

locking handle in the retracted position, which may result in personal injury.

The purpose of this utility model is to eliminate the possibility of locks on the handles of a two-armed device to fully ensure safe operation of the operator.

To achieve this goal, in the body of a known control valve, comprising a plate with channels for supplying and distributing compressed air and a flat spool rubbed to its surface, mounted with a handle to rotate through the valve head and roller, a latch with a piston is installed, which in turn contacts two holes in flat spool, which correspond to its two extreme positions. A spring is installed on the retainer, which ensures that the retainer is withdrawn from the hole with relieved pressure. A torsion spring is installed in the valve body, which ensures the valve is pressed to the plate and rotated to its original position if there is no pressure in the valve and the force from the valve handles has already been removed (i.e., when the pressure is applied to the control valve, the piston of the working cylinder will remain in its original position , because switching the control valve will not occur, because the valve spool is fixed).

Periodic pressure relief from the control valve, after which it becomes possible to switch it, is carried out by a manually operated air valve, normally open in the initial position.

Figure 1 shows a General view of the proposed control valve, which contains a plate 1 with channels for supplying and distributing compressed air, a flat spool 2 installed in the housing 3, with the possibility of rotation of the handle 4 through the roller 5, the torsion spring 6, the retainer with the piston 7 and spring 8.

Figure 2 shows a diagram of a two-armed switch device containing a pneumatic valve 9 with a control handle 10, normally open in the initial position, the control valve 11 and the working cylinder 12.

The control valve operates as follows: when one-handed operation on the handle 10 (Fig. 2) of the air distributor 9, the air supply is blocked and the cavity of the air distributor 9 and the control valve 11 communicate with the atmosphere. At the same time, the latch 7 (figure 1) under the action of the spring 8 comes out of the hole of the spool 2, providing the possibility of rotation. Continuing to hold the handle 10 of the air distributor 9 with one hand, with the other hand we turn the handle 4 of the control valve to the next position. We remove the force from the handle 10, the pressure is supplied to the control valve 11, the working cylinder 12 is actuated, the spool 2 is fixed by the latch 7 in the new position. We remove the force from the handle 4. If, when the pressure in the cavity of the control valve is removed and the handle 4 is set to a new position, the operator’s hand is removed from the handle 4, then the spool 2 and the handle 4 under the action of the spring 6 will return to their original position and the working cylinder 12 will not work at randomly applied pressure to the control valve 11.

At the filing date, drawings of a device for two-armed inclusion containing a control valve and a pneumatic distributor have been developed. The device is installed on a number of devices and stands. The use of such devices for two-armed inclusion allows you to completely eliminate the possibility of injury to the operator when fixing parts in the devices.

Claims (2)

1. The control valve for a two-armed switch, in the inner cavity of which is formed by a plate with channels for supplying and distributing compressed air and a housing, using a roller and a handle controlled by one operator’s hand, a spring-loaded flat spool rotates with the possibility of installation in two extreme positions, characterized in that, in order to ensure the safety of the operator, a latch with a piston and a spring for returning the latch are installed in the body of the control valve, and two openings for entry are made in the spool latch, the location of which corresponds to the two extreme positions of the valve connected to the housing by a torsion spring. 2. The control valve according to claim 1, characterized in that the periodic pressure relief for unlocking the spool is carried out by another pneumatic valve, normally open in the initial position, with the second hand of the operator.