RU166867U1 - GAS REDUCER - Google Patents

Abstract

A gas reducer comprising a housing (1) with upper (2) and lower (3) covers, in which a chamber cavity of the first stage (4) is formed with an inlet fitting (5) and with a diaphragm of the first stage (6), a chamber cavity of the second stage ( 7), communicated through the communication channel (8) with the chamber cavity of the first stage (4), the chamber cavity of the second stage (7) is made in communication with the outlet fitting (9) and with the spring-loaded diaphragm of the second stage (10) associated with the adjustment screw of the output regulator pressure (11) and the valve of the second stage (12) overlapping communicative channel Ala (8), a starting device (13), configured to press the spring-loaded diaphragm of the second stage (10) to force the opening of the valve of the second stage (12), as well as the cavity of the coolant chamber (14) separated by the wall from the cavity of the chamber of the first stage (4) ), having two coolant supply nozzles (15) for passing the coolant through the coolant chamber (14), characterized in that one of the coolant supply nozzles (15) is made as an additional input fitting (16) for connecting the gas source, in the wall separating the strips s coolant chamber (14) from the cavity of the first stage chamber (4) has an opening (17) for communicating between these chambers are cavities, and the input connection (5) and one coolant supply port (15) are plugged.

Description

The invention relates to the field of control valves of gas systems, in particular to devices for reducing gas pressure and regulating and stabilizing the outlet pressure of a given value. A gas reducer can be used in gas supply systems of vehicle engines and for stationary gas consuming devices.

Gas reducer - a device for lowering the pressure of a gas or gas mixture, at the outlet of a container (for example, in a cylinder or gas pipeline), to the working one and for automatically maintaining this pressure constant, regardless of changes in gas flow or pressure in the cylinder or gas pipeline.

At present, gas pressure reducers of high and low pressure are used in industry. Low pressure reducers are used as a gas pressure regulator for household gas-consuming appliances and, as a rule, are available as single-chamber or, more rarely, two-chamber. Such gearboxes have a fairly simple design, are cheap, but do not always have operational reliability and safety, which over time become directly dependent on the operating conditions and reliability of the materials of which this gearbox is made.

Known gas reducer (http://autodont.ru/transmission/reducer/gazovyj-reduktor-lovato), consisting of a housing, upper and lower covers, and parts of valve mechanisms (described in more detail below). This gas reducer is the closest analogue to the proposed one.

A disadvantage of the known gas pressure regulator is the inability to work when applying a low gas pressure (1 ... 5 kPa, or 0.01 ... 0.05 kg / cm ² ) from the household line due to the fact that the first stage of the pressure reducer is designed for an inlet pressure of about 0.05 ... 0.07 MPa (or 0.5 ... 0.7 kg / cm ² ), and he does not have an additional input for supplying low-pressure gas.

The objective of the proposed gas reducer is to eliminate the above drawback, as well as expanding the possibilities of using the modernized reducer not only in low pressure gas fuel supply systems to internal combustion engines, but also for other gas-using devices.

The specified technical result is achieved in that a gas reducer comprising a housing with upper and lower covers, in which at least one cavity of the first stage chamber is formed with an inlet fitting and with a diaphragm of the first stage, the cavity of the second stage chamber communicated through a communication channel with the chamber cavity of the first stage, the chamber cavity of the second stage is made in communication with the outlet fitting and with a spring-loaded diaphragm of the second stage associated with the adjusting screw of the outlet pressure regulator and the valve w To the second stage of overlapping the communication channel, the starting device is configured to press the spring-loaded diaphragm of the second stage to force open the valve of the second stage, as well as the cavity of the coolant chamber separated by a wall from the cavity of the chamber of the first stage, having at least two coolant supply fittings for passage coolant through the coolant chamber, while one of the coolant supply fittings is made as an additional input fitting for connecting a low gas source of pressure in the wall separating the chamber from the coolant cavity chamber of the cavity of the first stage has an opening for communication between these chambers are cavities, and inlet fitting and the other fitting coolant supply plugged performed.

These features are significant and are interconnected with the formation of a stable set of essential features sufficient to obtain the desired technical result.

The present utility model is illustrated by a specific example of execution, which, however, is not the only possible one, but clearly demonstrates the possibility of achieving the required technical result.

The utility model is illustrated by drawings, in which:

in FIG. 1 shows a gas reducer adopted as a prototype;

in FIG. 2 and FIG. 3 shows an example of a technical implementation of the proposed gas reducer.

In FIG. 1, 2, 3, the following positions designate the structural elements of both the known and the proposed gas reducers:

building 1

top cover 2

bottom cover 3

first stage chamber 4

inlet 5

first stage diaphragm 6

second stage chamber 7

communication channel 8

output fitting 9

spring-loaded diaphragm of the second stage 10

outlet pressure regulator adjusting screw 11

second stage valve 12

starting device 13

coolant chamber 14

coolant inlet 15

additional input fitting 16

hole 17

As shown in FIG. 1, a known gas reducer consists of a housing 1, upper and lower covers 2, 3 and parts of valve mechanisms.

This gas reducer provides a gas evaporator, made in the form of a cavity of the coolant chamber 14, in which there is a continuously heated liquid. For use in a car, this fluid is circulated hot antifreeze from the engine cooling system (inlet and outlet of antifreeze are not shown in the figure). For some cases, the supply of the heated fluid may not be, for example, for the case when the gearbox housing is heated by an external air heat stream of sufficient temperature, or in the case when the gaseous phase of the fuel gas is already supplied to the chamber, which does not require heating for evaporation.

As a result of heating, the gear housing warms up to operating temperature and, therefore, liquefied gas through the inlet 5 passes through the valve mechanism of the first stage into the cavity of the chamber of the first stage 4, evaporates and passes into a gaseous state. In this case, the gas acts on the diaphragm of the first stage 6 and, overcoming the resistance of the spring of the diaphragm of the first stage 6, shifts it down and closes the valve of the first stage through the lever. The balance of the gas pressure force and the spring force of the spring is achieved at a pressure of 0.05 ... 0.07 MPa (0.5 ... 0.7 kg / cm ² ).

From the cavity of the chamber of the first stage 4 through the communication channel 8, the gas enters the valve of the second stage 12 and, passing through it, fills the cavity of the chamber of the second stage 7. In this case, the gas acts on the spring-loaded diaphragm of the second stage 10, raises it, and through the lever closes the valve of the second stage 12. Equilibrium occurs at a pressure in the cavity of 50 ... 100 Pa (0.0005 ... 0.001 kg / cm ² ), that is, slightly above atmospheric.

When the engine is running, the vacuum from the mixer (not shown in Fig. 1) is transmitted through a hose to the chamber cavity of the second stage 7 and gas from it through the outlet fitting 9 enters the engine mixer. In this case, the pressure in the chamber cavity of the second stage 7 decreases, the diaphragm 10 lowers, opens the valve of the second stage 12, and gas from the chamber cavity of the first stage 4 enters the chamber chamber 7, and from there to the engine mixer. On the short arm of the diaphragm lever of the second stage 10, the adjusting screw 11 acts through the spring. Using the screw 11 adjust the output pressure of the gearbox in the cavity of the chamber 7, thereby adjusting the composition of the working gas-air mixture at idle engine operation.

To facilitate starting the engine, the gearbox is equipped with a starting device 13 to ensure that the output volume of the gearbox is pre-filled with gas. Before starting, the current from the onboard power supply of the engine is briefly supplied to the electrical winding of the starting device, while the starting device anchor is drawn into the coil of the electromagnetic system and presses the spring-loaded diaphragm of the second stage 10, the diaphragm through the lever opens the valve of the second stage 12 and the gas fills the volume of the chamber of the second stage 7, reaching the engine mixer.

In the case when the engine is not equipped with an onboard power supply, the starting device can be actuated by briefly pressing a finger on the protruding part of the armature of the starting device 13.

In this gas reducer, the safety function (for gas leakage after engine shutdown) must be performed by an external valve or automatic valve.

This utility model considers the design of an improved gas reducer designed to be used as a power unit for an internal combustion engine from a low pressure source, for example, from a centralized gas supply system (natural gas), or from an individual gas supply system from a gas cylinder (propane-butane) . The input pressure range supplied to the gearbox can be in the range from 1 to 5 kPa.

Below is an example of a specific implementation of the utility model.

As shown in FIG. 2 and FIG. 3, for connecting a source of low gas pressure, the gearbox is equipped with an additional inlet fitting 16. An opening 17 is made in the wall of the gas gearbox separating the cavities of the first stage chamber 4 and the coolant chamber 14, as a result of which the cavities of these chambers are communicated. The cavity of the coolant chamber 14 has nozzles for supplying the coolant 15 for circulation of the coolant. When implementing option 1, one of the fittings 15 of the coolant chamber 14 is performed as an input fitting for connecting a low gas pressure source, and the input fitting 5 of the cavity of the first stage 4 chamber and the other coolant supply fitting are muffled. In this case, the source of low gas pressure is connected to one of the fittings of the coolant chamber 14 and the gas enters the interconnected chamber cavities. The diaphragm 6 acts as a sealing gasket separating the cavity of the chambers 4 and 14 from the external environment. For such a design, the spring-loaded elements of the diaphragm of the first-stage chamber 4 and the valve for closing the entrance to this chamber can be excluded due to the loss of their function, as shown in FIG. 2 and FIG. 3. Otherwise, the operation of the gearbox does not differ from the original.

Claims (1)

A gas reducer comprising a housing (1) with upper (2) and lower (3) covers, in which a chamber cavity of the first stage (4) is formed with an inlet fitting (5) and with a diaphragm of the first stage (6), a chamber cavity of the second stage ( 7), communicated through the communication channel (8) with the chamber cavity of the first stage (4), the chamber cavity of the second stage (7) is made in communication with the outlet fitting (9) and with the spring-loaded diaphragm of the second stage (10) associated with the adjustment screw of the output regulator pressure (11) and the valve of the second stage (12) overlapping communicative channel Ala (8), a starting device (13), configured to press the spring-loaded diaphragm of the second stage (10) to force the opening of the valve of the second stage (12), as well as the cavity of the coolant chamber (14) separated by the wall from the cavity of the chamber of the first stage (4) ), having two coolant supply nozzles (15) for passing the coolant through the coolant chamber (14), characterized in that one of the coolant supply nozzles (15) is made as an additional input fitting (16) for connecting the gas source, in the wall separating the strips s coolant chamber (14) from the cavity of the first stage chamber (4) has an opening (17) for communicating between these chambers are cavities, and the input connection (5) and one coolant supply port (15) are plugged.

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