Gas reducer

FIELD: engineering of gas reducers.

SUBSTANCE: gas reducer contains body 1 with saddle 2 and lid 3, superstructure section, including superstructure screw 4, spring 5, membrane 6 with supporting plate 7 and pusher 8, reducing valve, consisting of hollow body 9 with through channel and thickening 10, balancing chamber 14, connected to hollow 21 of working pressure of body 1 and provided with controlling valve 17. Balancing chamber 14 may be made in body 1, or in its stopper 16, while reducing valve is mounted in the chamber with circular gap relatively to the wall of the latter. Chamber is provided with controlling valve, as spring of which spring of reducing valve is used.

EFFECT: low unevenness coefficient, low dimensions and weight of reducer.

5 cl, 1 dwg

 

The invention relates to the field of automatic control, and in particular to devices for gas pressure regulation, and can be used in various industries and agriculture.

Known gas gearbox, comprising a housing with a lid regulating screw with a button, the membrane with pressure disk spring that is installed with the possibility of interaction with a single ring with button screw, and the other end with pressure disc diaphragm, rigidly connected with the housing sleeve with a saddle and gear spindle, one end of which is selected based on the membrane, a piston with a sealing element and a spring mounted in the housing with the opportunity to interact with the other end of the gear spindle [1].

The gearbox is quite complicated in design, has a large size and weight, besides the unstable coefficient of non-uniformity and no possibility of increasing gas flow through the gearbox due to the absence in the latter of the necessary technical means.

Known gas gearbox, comprising a housing with a seat and lid, mounted in chassis tuning part, consisting of the tuning screw with spring, membranes and pushers, and a reducing valve, comprising a hollow body in which you installed the seal and the piston with Perugino is. Improving the consistency of the output pressure of the gas stream, and therefore the coefficient of non-uniformity, and reduced size and weight of the gearbox is achieved by the fact that the seal reducing valve are balanced camera, bounded by the piston and having a diameter equal to the diameter of the seat [2]. The set of essential characteristics in the gear closest to the claimed invention and is taken as a prototype.

The gear has higher technical and operational characteristics in comparison with the device according to [1], however, it also lacks the possibility of increasing gas flow while maintaining the stability of the coefficient of non-uniformity, due to the absence in the composition of the gearbox of the necessary technical means. When this exception friction due to the presence of the seal of the piston in the node of the reducing valve, would also contribute to stabilization of the coefficient of non-uniformity in the operation of the gearbox.

The objective of the invention is to create a small gas reducer, increase gas flow through which would occur without compromising the irregularity factor.

The task is solved in that in the gas reducer, comprising a housing with a seat and lid, mounted in chassis tuning part, including the adjustment screw with a spring, m is mbrane pusher and reducing valve comprising a hollow body with a through channel, seal and spring balancing chamber, communicated with the cavity of the working pressure by the specified end-to-end channel, according to the invention the balancing chamber is formed in the housing, and the reducing valve is installed in the chamber with the annular gap relative to its walls, while the camera is equipped with a control valve, as a spring which used spring reducing valve.

Appropriate balancing the camera to perform in rigidly and tightly connected with the casing stub.

Suitable reducing valve to comply with the annular element of resilient material placed in the second groove on the outer surface of the hollow body.

Suitable annular element reducing valve made of PTFE.

It is advisable to seal the reducing valve to perform stereobase shape with two end-to-end channel, in the step of larger diameter which to place the end of the pusher membrane, and the step of smaller diameter - end of the control valve.

When using the invention may be obtained from the technical result, which is expressed in the increase of gas flow through the gearbox, while maintaining the magnitude of the coefficient of non-uniformity in% the CoE manual, due to the implementation of balancing the camera directly in the housing (or rigidly and hermetically fixed to the body of the plug), placement in a specified camera reducing and control valves and the preload of the control valve spring-loaded reducing valve pusher membrane. While the dimensions of the gearbox almost saved as the gear [2].

Other advantages of the invention will be seen from the description and drawing, which shows a General view of the gas reducer, longitudinal section.

Gas reducer includes a housing 1 with the seat 2 and lid 3 mounted in the housing of the adjustment part, including the adjustment screw 4, a spring 5, a diaphragm 6 with a support plate 7, which is rigidly connected to the plunger 8, and a reducing valve, comprising a hollow body 9 seal 10 stereobase shape, provided with two feed channel 11, in the step of larger diameter which is placed the end of the plunger 8, and the ring element 12 of elastic material, such as Teflon, is placed in the second groove 13 on the outer surface of the hollow body 9, which is installed in balancing the camera with 14 annular gap relative to its walls, designed for pneumatic communication of the chamber with the cavity 15 of the high-pressure casing 1. The camera 14 may be implemented in hard-and GE is metecno associated with the housing 1 of the plug 16, as shown in the drawing, and has a control valve 17, one end of which is installed in a stage of smaller diameter consumable channel 11 in front of the pusher 8 and the other end mounted in the mounting hole 18 of the stub, with both valves under the influence of spring 19 reducing valve is spring-loaded in the direction of the seat 2 and the pusher 8. In the initial state shown in the drawing, the screw 4 is turned, the spring 5 is not loaded, the spring 19 pressing the reducing valve seal 10 to the seat 2, and the control valve 17 is at the overlap of the expenditure of the channel 11 in the seal 10. When the flow of gas through the inlet fitting 20 and he will go into the cavity 15 of the high pressure and associated balancing chamber 14 to equalize the pressure in the tank. The passage of gas into the cavity 21 of the operating pressure is excluded.

Gas gearbox works as follows. Mode of gas flow by rotation of the adjustment screw 4 load spring 5, which through the membrane 6 moves the plunger 8 in conjunction with the control valve 17 in the bottom (drawing) position with the formation of the gap between the seal 10 and the valve 17, while balancing chamber 14 through the expenditure channel 11 communicates with the cavity 21 of the operating pressure, and the gas from the chamber 14 enters the cavity 21, and the gas pressure in the chamber 14 begins to decrease, resulting force acting on reducing LAPAN from the pressure of the gas from the cavity 15, will exceed the force acting on the reducing valve from the side of the camera 14, and the latter will begin to move in the direction control valve 17. Thus between the seat 2 and the seal 10 of the reducing valve, a gap through which the gas outflow from the cavity 15 of the high pressure in the cavity 21 of the operating pressure, which channel 22 is connected with podobrannoj cavity 23. The gas pressure in the cavity 21 and the associated cavity 23 growing up until the force acting on the membrane 6 from the gas pressure are balanced with the force acting on the diaphragm 6 by the spring 5. In the membrane 6, the pusher 8 and the valve 17 will take the position that provides the flow of gas at constant pressure. Reducing valve occupies a position in which the outflow of gas from the balancing chamber 14 into the cavity 21 of the operating pressure through the channel 11 is aligned with the inflow of gas from the cavity 15 of the high pressure in the balancing chamber 14 through the gap between the annular element 12 and the wall of the chamber. At the termination of the gas pressure in the cavities 21 and 23 begins to rise, the spring 5 is compressed, and the membrane 6, the plunger 8, the valve 17 under the action of the spring 19 is moved in the direction of closing the valve 17, which in turn pushes the reducing valve to the seat 2, is the termination of the gas flow. In which the result of the pressure in the cavity 15 and a balancing chamber 14 is aligned, which leads to additional preload reducing valve to the seat 2 due to the pressure difference between the balancing chamber 14 and the cavity 21 of the operating pressure.

The prototype gearbox has been successfully tested in the oxygen system from the container when the welding operations.

Sources of information

1. Lpeak, Dzemila. Laboratory work on technology and equipment flame treatment of metals, PM, engineering, 1968, .38-41, figure 22.

2. Certificate of the Russian Federation for useful model No. 6034, CL F 16 17/00, publ. 16.02.98, bull. No. 2 - the prototype.

1. Gas reducer, comprising a housing with a seat and lid, mounted in chassis tuning part, including the adjustment screw with spring, diaphragm pusher and the reducing valve comprising a hollow body with a through channel, seal and spring balancing chamber, communicated with the cavity of the working pressure by the specified pass-through channel, wherein the balancing chamber is formed in the housing, and the reducing valve is installed in the chamber with the annular gap relative to its walls, while the camera is equipped with a control valve, as a spring which used spring reducing valve.

2. The gearbox according to claim 1, characterized in that the balancing chamber in the designs are rigidly and tightly connected with the casing stub.

3. The gearbox according to claim 1, characterized in that the reducing valve is made with a ring element made of elastic material, placed in the second groove on the outer surface of the hollow body.

4. The gearbox according to claim 3, characterized in that the annular element reducing valve made of PTFE.

5. The gearbox according to claim 3, characterized in that the sealing reducing valve made stereobase shape with two end-to-end channel, in steps larger diameter of which is placed the end of the pusher membrane, and the step of smaller diameter - end of the control valve.



 

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