SU1613767A1 - Gas cock - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to devices for controlling gas flow in laboratory furnaces and household gas appliances. The aim of the invention is to increase reliability by improving the tightness of the faucet. In the low flow mode, the control handle 10 is turned counterclockwise until it stops, aligning the opening in the stopper 4 with the opening of the channel 2. In this position, the opening of the channel 3 is open and does not overlap with a thickening 13 of the rod 11, and the groove 12 in the rod 11 is aligned with bore 7 for plug 4 and serves as a gas passageway. The regulation of the small gas flow rate is carried out by changing the flow area of the channel formed by the bore 12 and the hole 7 by moving the rod 11 relative to the plug 4, for which the adjusting screw 17 is turned.

Description

The invention relates to mechanical engineering, in particular to devices for controlling gas flow, and can be used in laboratory furnaces with gas burners and in household gas appliances.

The aim of the invention is to increase reliability by improving the tightness of the faucet.

FIG. 1 shows the valve in the low flow position, longitudinal section; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a view along arrow B in FIG. one; in fig. 4 - valve in the closed position, longitudinal section; in fig. 5 - settlement B-B in FIG. four.

The gas valve consists of a housing 1 with an inlet 2 and outlet 3 channels, spring-loaded hollow conical plug 4 installed in the bore of the housing. In the plug 4, the channel 5 of the main flow, the input channel 6 of the low flow and the outlet 7 of the low flow are located in the bottom 8 of the plug 4.

Inside the housing 1, a spring-loaded rod 9 is engaged with the possibility of a gate and axial movement, which engages with the plug 4 and is connected to the handle 10 of the control. The central rod 11 is rigidly attached to the rod 9, in which the groove 12 and the thickening 13 are placed, placed in the zone of the opening 7 of the bottom 8 of the plug. 4 and the openings of the output channel 3, respectively.

In the middle part of the rod 9, an elastic membrane 14 is tightly placed, the edges of which are rigidly fixed in the flanges 15 of the housing 1. The control handle 10 is provided with a clamp 16 of the extreme positions. In the center of the handle 10 of the control, an adjusting screw 17 is installed, which interacts through the rod with the central rod 11.

The length of the groove 12 is equal to the sum of the thickness of the bottom 8 of the plug 4 and the stroke length of the screw 17. The diameter of the rod 11 is equal to the diameter of the hole 7. The diameter and the length of the thickening 13 are equal respectively to the diameter

but

with about:

with the depth and wall thickness of the bottom of the output channel 3. Inside the crane are springs 18 and 19. The stiffness of the spring 18 is greater than the stiffness of the spring 19.

Gas tap works as follows.

The gas in the main flow mode from channel 2 through channel 5 enters the open port of channel 3. At the same time, the handle 10 of the control is deepened, and the rod 11 with a thickening 13 is extended, which ensures the free passage of gas into channel 3.

In the low flow mode, the control handle 10 is turned counterclockwise until it stops, while aligning the bore of the channel 6 with the bore of the input channel 2, as shown in fig. 1. In this position, the opening of the channel 3 is 7 7 открытым open, and the groove 12 in the rod | e 11 is aligned with the opening 7 of the plug 4 t | serves as a flow channel for gas flow into the channel 3. The regulation of the whole gas flow is carried out by measuring the channel cross section by axial movement of the rod 11 relative to the plug 4, for which the adjusting screw 17 is rotated to the desired value.

To shut off the gas supply, the knob 10 is turned clockwise through the position of the main flow to the stop. In this case, the lateral side of the conical plug 4 blocks the opening of the inlet channel 2, and the handle 10 together with the rod 9 and the rod 11 under the action of

the compressive forces of the springs 18 and 19 move to the right, taking the position shown in FIG. 4. The thickening 13 enters the opening of the channel 3, and the groove 12 leaves the opening 7 of the bottom 8 inside the cavity of the plug 4, due to which there is an additional blocking of the gas passage ways through the crane parts to the consumer into the channel 3. rotation and axial movement of the rod 9, ensures the tightness of the gas valve body on the side of the control handle both in the closed position of the valve and in the low flow mode.

Claims (1)

Invention Formula A gas valve, comprising a housing with inlet and outlet channels, a stem, a spring-loaded hollow conical tube installed in the bore of the housing, with main and low gas flow channels and a low-flow control element and passing through the tube with axial movement and a central rod connected to the stem , characterized in that in order to increase the reliability of operation, a locking member is fixed on the rod, blocking the output channel, and the low flow control element is designed as a groove 0 on the rod located in the zone of the bottom of the tube with the formation of throughput channels when the rod is shifted towards the output channel. five S 11 g 3 13 1 12 7 16 d sch / 5 ig. 9 P ten A (Rig.g. z // 7 ///// У7 /// 7. Fig4 Vidb Fig.: 5