A pressure-reducing linkage low-pressure gas release pressure reducer

Abstract

The present invention discloses a pressure-reducing, linked low-pressure-releasing gas pressure reducer, comprising an air inlet nozzle, a housing, a pressure-regulating assembly, and a pressure-reducing assembly. When a rotating screw moves toward a linked valve assembly, the linked valve assembly pushes the pressure-reducing assembly via a push rod, allowing gas to enter chamber 2 from chamber 1. When the rotating screw moves away from the linked valve assembly, the push rod moves upward, extending the pressure-regulating spring, disengaging the linked valve assembly from the push rod and opening, allowing gas to be discharged from chamber 2 into the outer housing. The present invention can simultaneously release downstream gas while closing the pressure reducer handle, protecting downstream equipment from prolonged pressure. The product features a compact structure and high reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure reducers, and in particular to a pressure reducing linked low-pressure gas releasing pressure reducer. Background Art

[0002] Currently, the gas supply system equipped with a pressure reducer has the problem that the downstream gas cannot be automatically released after the pressure reducer switch is turned off. If a closed cavity is formed downstream, the downstream equipment will always be under pressure, which will cause damage to some valves and sensitive components and shorten their service life. Summary of the Invention

[0003] The purpose of the present invention is to make up for the defects of the existing technology and provide a pressure reducing linked low-pressure release gas pressure reducer. The present invention links the pressure relief valve with the pressure reducer switch handle, and can open the pressure relief valve while closing the pressure reducer, and discharge the downstream gas through the pressure relief hole, thereby protecting the downstream equipment.

[0004] The present invention is achieved through the following technical solutions:

[0005] A pressure reducing and linked low-pressure releasing gas pressure reducer, comprising an air inlet nozzle, a shell, a pressure regulating component and a pressure reducing component;

[0006] The air inlet nozzle is installed at the air inlet end of the shell, and an oxygenation valve assembly is sealed inside the air inlet nozzle; the shell is provided with a cavity 1 and a cavity 2 which are connected to each other; the cavity 1 is connected to the air inlet nozzle;

[0007] The pressure-regulating assembly comprises an outer shell, a screw sleeve, a screw, a pressure-regulating spring, a rubber diaphragm, a linkage valve assembly and a push rod; the upper and lower ends of the outer shell are open, the lower end of the outer shell is threadedly connected to the inner wall of the upper end of the cavity two of the shell, and the screw sleeve is threadedly connected to the inner wall of the upper end of the outer shell; the screw is passed through the top of the screw sleeve and is threadedly connected to the top of the screw sleeve; the pressure-regulating spring is located inside the screw sleeve and the outer shell, the lower end of the screw contacts the upper end of the pressure-regulating spring, the rubber diaphragm is sealingly installed inside the lower end of the outer shell, the rubber diaphragm can slide up and down at the lower end of the outer shell, the lower end of the pressure-regulating spring is fixed on the diaphragm, a center hole is opened in the center of the rubber diaphragm, the linkage valve assembly is sealingly passed through the center hole of the rubber diaphragm and fixed; the push rod is located inside the connecting part of cavity one and cavity two, the linkage valve assembly contacts the upper end of the push rod; the lower end of the push rod contacts the pressure reducing assembly; the pressure reducing assembly is located in cavity one;

[0008] When the rotating screw moves toward the linkage valve assembly, the linkage valve assembly pushes the pressure reducing assembly to move through the push rod, and the gas enters the second chamber from the first chamber.

[0009] When the rotating screw moves away from the linkage valve assembly, the push rod moves upward, the pressure regulating spring is in an extended state, the linkage valve assembly is separated from the push rod and opens, and the gas enters the outer shell from the second cavity and is discharged.

[0010] The linkage valve assembly includes a valve body, a spherical valve, a return spring and a screw plug; the screw plug is fixedly installed in the second cavity; the inner wall of the valve body is stepped, the top of the valve body is provided with a small air hole, and the bottom is open, the spherical valve is located inside the lower end of the valve body, the upper end of the return spring is fixed to the inner wall of the top of the valve body, the lower end of the return spring is fixedly connected to the spherical valve, the valve body is passed through and fixed in the center hole of the rubber diaphragm, and the upper end of the push rod passes through the screw plug and extends into the second cavity;

[0011] When the rotating screw moves toward the linkage valve assembly, the pressure-adjusting spring drives the rubber diaphragm and the spherical valve downward. The lower end of the valve body contacts the screw plug and pushes the spherical valve upward, blocking the vent hole at the upper end of the valve body. At the same time, the spherical valve presses down the ejector rod, pushing the pressure reducing assembly to move, and the gas enters the second chamber from the first chamber.

[0012] When the rotating screw moves away from the linked valve assembly, the rubber diaphragm and the valve body move upward and reset, the linked valve assembly separates from the push rod, and the spherical valve separates from the vent hole at the upper end of the valve body under the thrust of the reset spring. The push rod moves upward, and the gas enters the outer shell from the second cavity and is discharged.

[0013] The linkage valve assembly also includes a guide sleeve, which is located on the inner wall of the lower end of the valve body. The spherical valve is located in the guide sleeve to guide the spherical valve.

[0014] The pressure regulating assembly further comprises a hard core, which is located between the screw and the pressure regulating spring.

[0015] The linkage valve assembly also includes a gasket, the lower end of the pressure regulating spring is fixedly connected to the gasket, and the gasket is fixed on the rubber diaphragm.

[0016] The decompression assembly includes a decompression valve, a decompression spring, and a decompression valve body; the lower end of the decompression spring is fixed in the first cavity, and the upper end contacts the decompression valve; the decompression valve and the decompression spring are located in the decompression valve body, and the decompression valve body is sealed and installed in the second cavity and can slide up and down in the second cavity. Under the action of the decompression spring, the decompression valve seals the decompression valve body; the lower end of the push rod extends into the second cavity and contacts the decompression valve body;

[0017] When the push rod pushes the decompression valve body to move downward, the gas enters the second cavity from the first cavity.

[0018] The oxygenation valve assembly includes an oxygenation valve and an oxygenation spring, one end of the oxygenation spring is fixed in the air intake nozzle, and the other end is connected to the oxygenation valve; the oxygenation valve is sealed and installed in the air intake nozzle and can slide in the air intake nozzle; when oxygenating, the oxygenation valve compresses the oxygenation spring and the gas enters cavity one.

[0019] The oxygenating valve assembly also includes a filter block, which is installed on the air inlet nozzle to filter the gas.

[0020] A limiting boss is provided on the inner wall of the outer shell and above the rubber diaphragm.

[0021] The advantages of the present invention are that the present invention can release downstream gas while closing the pressure reducer handle, thereby protecting downstream equipment from being pressurized for a long time, and the product has a compact structure and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a partially enlarged view of the present invention. DETAILED DESCRIPTION

[0024] like Figure 1 、 2 As shown, a pressure reducing linked low-pressure releasing gas pressure reducer includes an air inlet nozzle 1, a shell 12, a pressure regulating component and a pressure reducing component;

[0025] The air inlet nozzle 1 is installed at the air inlet end of the housing 12, and an oxygenation valve assembly is sealed in the air inlet nozzle 1; the housing 12 is provided with a cavity 1 22 and a cavity 2 23 that are interconnected; the cavity 1 22 is connected to the air inlet nozzle 1;

[0026] The pressure regulating assembly includes an outer shell 8, a screw sleeve 5, a screw 2, a pressure regulating spring 4, a rubber diaphragm 6, a linkage valve assembly and a push rod 15; the upper and lower ends of the outer shell 8 are open, the lower end of the outer shell 8 is threadedly connected to the inner wall of the upper end of the cavity 23 of the shell 12, and the screw sleeve 5 is threadedly connected to the inner wall of the upper end of the outer shell 8; the screw 2 is passed through the top of the screw sleeve 5 and is threadedly connected to the top of the screw sleeve 5; the pressure regulating spring 4 is located inside the screw sleeve 5 and the outer shell 8, the lower end of the screw 2 contacts the upper end of the pressure regulating spring 4, and the rubber diaphragm 6 seals Installed inside the lower end of the outer shell 8, the rubber diaphragm 6 can slide up and down at the lower end of the outer shell 8. The rubber diaphragm 6 is used to seal the second cavity 23. The lower end of the pressure-regulating spring 4 is fixed to the diaphragm. A center hole is opened in the center of the rubber diaphragm 6. The linkage valve assembly is sealed and fixed through the center hole of the rubber diaphragm 6. The push rod 15 is located inside the connecting portion between the first cavity 22 and the second cavity 23. The linkage valve assembly contacts the upper end of the push rod 15. The lower end of the push rod 15 contacts the decompression assembly. The decompression assembly is located in the first cavity 22.

[0027] When the rotating screw 2 moves toward the linkage valve assembly, the linkage valve assembly pushes the decompression assembly to move through the push rod 15, and the gas enters the second chamber 23 from the first chamber 22;

[0028] When the rotating screw 2 moves away from the linkage valve assembly, the push rod 15 moves upward, the pressure regulating spring 4 is in an extended state, the linkage valve assembly is separated from the push rod 15 and opened, and the gas enters the outer shell 8 from the second cavity 23 and is discharged.

[0029] The linkage valve assembly includes a valve body 14, a spherical valve 16, a return spring 10 and a screw plug 13; the screw plug 13 is fixedly installed in the second cavity 23; the inner wall of the valve body 14 is stepped, the top of the valve body 14 is provided with a small air hole, and the bottom is open, the spherical valve 16 is located inside the lower end of the valve body 14, the upper end of the return spring 10 is fixed to the inner wall of the top of the valve body 14, the lower end of the return spring 10 is fixedly connected to the spherical valve 16, the valve body 14 is passed through and fixed in the center hole of the rubber diaphragm 6, and the upper end of the push rod 15 passes through the screw plug 13 and extends into the second cavity 23;

[0030] When the rotating screw 2 moves toward the linkage valve assembly, the pressure-regulating spring 4 drives the rubber diaphragm 6 and the spherical valve 16 downward. The lower end of the valve body 14 contacts the screw plug 13, pushing the spherical valve 16 upward, blocking the vent hole at the upper end of the valve body 14. At the same time, the spherical valve 16 presses down the ejector pin 15, pushing the decompression assembly to move, and the gas enters the second chamber 23 from the first chamber 22.

[0031] When the rotating screw 2 moves away from the linked valve assembly, the rubber diaphragm 6 and the valve body 14 move upward and reset, the linked valve assembly disengages from the push rod 15, and the spherical valve 16 separates from the vent hole at the upper end of the valve body 14 under the thrust of the reset spring 10. The push rod 15 moves upward, and the gas enters the outer shell 8 from the second cavity 23 and is discharged.

[0032] The linkage valve assembly further includes a guide sleeve 9 , which is located on the inner wall of the lower end portion of the valve body 14 . The spherical valve 16 is located in the guide sleeve 9 to guide the spherical valve 16 .

[0033] The pressure regulating assembly further includes a hard core 7 , which is located between the screw 2 and the pressure regulating spring 4 .

[0034] The linkage valve assembly further includes a gasket 11 . The lower end of the pressure-regulating spring 4 is fixedly connected to the gasket 11 , and the gasket 11 is fixed on the rubber diaphragm 6 .

[0035] The decompression assembly includes a decompression valve 17, a decompression spring 19, and a decompression valve body 18; the lower end of the decompression spring 19 is fixed in the cavity 1 22, and the upper end contacts the decompression valve 17; the decompression valve 17 and the decompression spring 19 are located in the decompression valve body 18, and the decompression valve body 18 is sealed and mounted in the cavity 2 23 and can slide up and down in the cavity 2 23. Under the action of the decompression spring 19, the decompression valve 17 seals the decompression valve body 18; the lower end of the push rod 15 extends into the cavity 2 23 and contacts the decompression valve body 18;

[0036] When the push rod 15 pushes the decompression valve body 18 to move downward, the gas enters the second cavity 23 from the first cavity 22 .

[0037] The oxygenation valve 20 assembly includes an oxygenation valve 20 and an oxygenation spring 21, one end of the oxygenation spring 21 is fixed in the air inlet nozzle, and the other end is connected to the oxygenation valve 20; the oxygenation valve 20 is sealed and installed in the air inlet nozzle and can slide in the air inlet nozzle; when oxygenating, the oxygenation valve 20 compresses the oxygenation spring 21, and the gas enters cavity 1 22.

[0038] The oxygenation valve 20 assembly further includes a filter block 3, which is mounted on the air inlet nozzle to filter the gas.

[0039] A limiting boss is provided on the inner wall of the outer shell 8 above the rubber diaphragm 6 .

[0040] The present invention works as follows:

[0041] During operation, the rotary switch drives the screw 2 to push open the pressure relief valve 17, and the inner ball valve 16 is linked to the rotary switch. The pressure relief valve 17 is in the open state, and the push rod 15 of the pressure relief valve 17 closes the inner ball valve 16. In this way, the high-pressure oxygen in the oxygen cylinder is reduced by the pressure relief mechanism and supplied to the downstream normally. When the oxygen cylinder assembly of the unit is shut down, the switch is rotated in the opposite direction, driving the screw 2 upward. The pressure relief valve 17 closes under the action of the pressure relief spring 19 and the pressure, and no longer supplies oxygen to the downstream. At the same time, due to the linkage, the push rod 15 on the pressure relief valve 17 will be limited and disengaged from the inner ball valve 16. The ball valve 16 is separated from the valve body 14 under the action of the return spring 10. In this way, the oxygen in the downstream pipeline will flow through the gap of the ball valve 16 to the pressure relief hole and finally be discharged to the atmosphere, thereby closing the switch and simultaneously releasing the downstream oxygen pressure. For system safety, a large-channel safety valve with a set opening pressure is also provided in the downstream pipeline to ensure rapid release in the event of downstream overpressure.

Claims

1. A pressure reducing and low-pressure releasing gas pressure reducer, characterized in that: The vent is sealed with an oxygen valve assembly; the housing is provided with a cavity one and a cavity two that are interconnected; the cavity one is connected to the vent; the pressure regulating assembly comprises an outer shell, a screw sleeve, a screw, a pressure regulating spring, a rubber diaphragm, a linkage valve assembly and a push rod; the upper and lower ends of the outer shell are open, the lower end of the outer shell is threadedly connected to the inner wall of the upper end of the cavity two of the shell, and the screw sleeve is threadedly connected to the inner wall of the upper end of the outer shell; the screw is passed through the top of the screw sleeve and is threadedly connected to the top of the screw sleeve; the pressure regulating spring is located inside the screw sleeve and the outer shell, the lower end of the screw contacts the upper end of the pressure regulating spring, and the rubber diaphragm is seal-mounted inside the lower end of the outer shell. The rubber diaphragm can slide up and down at the lower end of the outer shell, the lower end of the pressure-regulating spring is fixed on the diaphragm, a center hole is opened in the center of the rubber diaphragm, and the linked valve assembly is sealingly penetrated through the center hole of the rubber diaphragm and fixed; the push rod is located inside the connecting part of the cavity one and the cavity two, and the linked valve assembly contacts the upper end of the push rod; the lower end of the push rod contacts the pressure reducing assembly; the pressure reducing assembly is located in the cavity one; when the rotating screw moves in the direction approaching the linked valve assembly, the linked valve assembly pushes the pressure reducing assembly to move through the push rod, and the gas enters the cavity two from the cavity one; when the rotating screw moves in the direction away from the linked valve assembly, the push rod moves upward, the pressure-regulating spring is in an extended state, the linked valve assembly is separated from the push rod and opens, and the gas enters the outer shell from the cavity two and is discharged; The linkage valve assembly includes a valve body, a spherical valve, a reset spring and a screw plug; the screw plug is fixedly installed in the second cavity; the inner wall of the valve body is stepped, the top of the valve body is provided with a small air hole, the bottom end is open, the spherical valve is located inside the lower end of the valve body, the upper end of the reset spring is fixed to the inner wall of the top of the valve body, the lower end of the reset spring is fixedly connected to the spherical valve, the valve body is fixed in the center hole of the rubber diaphragm, the upper end of the push rod passes through the screw plug and extends into the second cavity; the screw is rotated in the direction close to the linkage valve assembly During movement, the pressure-adjusting spring drives the rubber diaphragm and the spherical valve downward, the lower end of the valve body contacts the screw plug, and pushes the spherical valve upward, blocking the ventilation hole at the upper end of the valve body. At the same time, the spherical valve presses down the ejector rod, pushing the decompression assembly to move, and the gas enters the second chamber from the first chamber. When the rotating screw moves away from the linkage valve assembly, the rubber diaphragm and the valve body move upward and reset, the linkage valve assembly separates from the ejector rod, and the spherical valve separates from the ventilation hole at the upper end of the valve body under the thrust of the reset spring. The ejector rod moves upward, and the gas enters the outer shell from the second chamber and is discharged. The linkage valve assembly further comprises a guide sleeve, which is located on the inner wall of the lower end portion of the valve body, and the spherical valve is located in the guide sleeve to guide the spherical valve; The pressure regulating assembly further comprises a hard core, wherein the hard core is located between the screw and the pressure regulating spring; The linkage valve assembly further comprises a gasket, the lower end of the pressure regulating spring is fixedly connected to the gasket, and the gasket is fixed on the rubber diaphragm; The decompression assembly includes a decompression valve, a decompression spring, and a decompression valve body; the lower end of the decompression spring is fixed in cavity one, and the upper end contacts the decompression valve; the decompression valve and the decompression spring are located in the decompression valve body, and the decompression valve body is sealed and installed in cavity two and can slide up and down in cavity two. Under the action of the decompression spring, the decompression valve seals the decompression valve body; the lower end of the push rod extends into cavity two and contacts the decompression valve body; when the push rod pushes the decompression valve body downward, gas enters cavity two from cavity one; The oxygenation valve assembly includes an oxygenation valve and an oxygenation spring, one end of the oxygenation spring is fixed in the air inlet nozzle, and the other end is connected to the oxygenation valve; the oxygenation valve is sealed and installed in the air inlet nozzle and can slide in the air inlet nozzle; when oxygenating, the oxygenation valve compresses the oxygenation spring, and the gas enters cavity one; The oxygenation valve assembly further includes a filter block, which is mounted on the air inlet nozzle to filter the gas; A limiting boss is provided on the inner wall of the outer shell and above the rubber diaphragm.

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