Feedback gas pressure reducing valve

Abstract

This invention discloses a feedback-type gas pressure reducing valve, which includes an inlet channel, a pressure reducing system, a feedback pressure regulating system, a braking system, an outlet channel, and a valve body. High-pressure gas is input through the inlet channel and reduced in pressure by the pressure reducing system to become the low-pressure gas required by downstream gas-consuming equipment. The feedback pressure regulating system adjusts the output gas pressure based on the pressure of the high-pressure gas input through the inlet channel, controlling the gas pressure output by the pressure reducing system. The braking system blocks gas flow in case of pressure reducing failure or abnormal input pressure. The reduced-pressure gas is output to the gas-consuming equipment through the outlet channel. This invention has a simple structure, good controllability of pressure reduction effect, low operation and maintenance cost, convenient troubleshooting, can achieve overcurrent self-cutoff, and has high safety.

Description

Technical Field

[0001] This invention relates to the field of compressed gas pressure reducing devices, and in particular to the design of a feedback-type gas pressure reducing valve. Background Technology

[0002] With the increasingly widespread use of high-pressure gas, various types of pressure-reducing valves are rapidly developing, and the optimization of gas valve structures will also promote the application of gas. Taking aircraft launching in weaponry as an example, gunpowder gas can be used to provide power for suspended catapults. To increase the single-charge stroke of gas-powered catapults, high-pressure chambers are set up on the catapults to contain the gunpowder gas rupture. At this time, the pressure of the gunpowder gas is generally several hundred megapascals. After the gas passes through the low-pressure chamber, it actuates the piston, which then acts on the hook, finally pushing the projectile. In this process, the pressure-reducing valve that reduces the pressure of the high-pressure gas is particularly important. At the same time, in practical applications, the stability of the pressure-reducing valve is related to the power of the catapult and even the safety of the aircraft.

[0003] As the piston actuates, the pressure in the high-pressure chamber of the gas gradually decreases. In order to obtain a stable low-pressure gas output, the pressure reducing valve core and valve seat of the pressure reducing valve must frequently move relative to each other to adjust the pressure of the output gas. Since the gas flow in the gas passage between the pressure reducing valve core and valve seat is relatively fast, whether it is the scouring of impurities in the gas path, the friction between the pressure reducing valve core and valve seat, or the fatigue failure of the components themselves, all of these will lead to a deterioration in the performance of the pressure reducing valve, and may even affect the closing of the pressure reducing valve core and valve seat. When the suspension ejection is not in use, the gas pressure in the high-pressure chamber will slowly rise or the pressure reduction will no longer be effective, causing rupture ignition, projectile derailment, or other engine failures. Therefore, it is urgent to study a gas pressure reducing valve with high reliability and strong practicality. Summary of the Invention

[0004] The purpose of this invention is to provide a gas pressure reducing valve that is simple in structure, has controllable pressure reduction effect, low maintenance cost, high reliability, and strong practicality.

[0005] The technical solution to achieve the purpose of this invention is: a feedback gas pressure reducing valve, including an air inlet channel, a pressure reducing system, a feedback pressure regulating system, a braking system, an air outlet channel, and a valve body;

[0006] The air intake passage is used to input high-pressure fuel gas;

[0007] The pressure reduction system is used to reduce the pressure of the high-pressure gas input into the intake channel into the low-pressure gas required by the downstream gas-using equipment.

[0008] The feedback pressure regulating system is used to adjust the pressure of the high-pressure gas input into the intake channel and control the gas pressure output by the pressure reduction system.

[0009] The braking system is used to block the flow of gas in the event of pressure reduction failure or abnormal input pressure.

[0010] The gas outlet channel is used to output depressurized low-pressure gas;

[0011] The valve body is the main body of the gas pressure reducing valve, used to install various components and provide a system framework for each component.

[0012] Furthermore, the pressure-reducing system includes a pressure-reducing valve seat, a pressure-reducing valve core, and a pressure-reducing chamber;

[0013] The pressure-reducing valve seat is connected to the intake channel, receives the high-pressure gas supplied by the intake channel, reduces the pressure, and outputs it to the braking system.

[0014] The pressure-reducing valve seat has a conical groove at the output position, and the pressure-reducing valve core has a conical protrusion. The feedback pressure regulating system controls the gap between the conical groove of the pressure-reducing valve seat and the conical protrusion of the pressure-reducing valve core by controlling the amount of gas entering the pressure-reducing chamber, thereby achieving gas pressure reduction.

[0015] Furthermore, the feedback pressure regulating system includes a feedback channel, a pressure regulating seat, a pressure regulating valve core, a pressure regulating bolt, an oil guide groove, a pressure regulating channel, a spring, and a diaphragm;

[0016] The feedback channel is connected to the intake channel to receive the high-pressure gas supplied by the intake channel. The feedback channel is also connected to the pressure regulating seat to supply the high-pressure gas. The output port of the pressure regulating seat is connected to the pressure regulating channel. The size of the output port of the pressure regulating seat is adjusted by the pressure regulating valve core and the pressure regulating bolt to control the amount of high-pressure gas supplied to the pressure regulating channel. The pressure regulating channel is connected to the pressure reducing chamber, which contains a spring and a diaphragm. The diaphragm is installed at the rear end of the pressure reducing valve core, dividing the pressure reducing chamber into a high-pressure chamber and a low-pressure chamber. Under the action of the high-pressure gas and the spring, the high-pressure chamber adjusts the distance between the conical groove of the pressure reducing valve seat and the conical protrusion of the pressure reducing valve core to control the amount of gas entering the pressure reducing chamber. The valve body is provided with a vent hole, and the vent channel is connected to the adjusting bolt and the pressure regulating channel to vent the gas in the high-pressure chamber to the low-pressure chamber, reducing the gas pressure in the high-pressure chamber and maintaining system pressure balance.

[0017] Furthermore, the braking system includes a braking cavity, a guide vane, a steel column, and a baffle.

[0018] The braking chamber receives low-pressure gas from the pressure reduction system and delivers it to the outlet channel for output. A guide plate is installed at the inlet of the braking chamber to prevent gas backflow. A steel column and a baffle are installed at the outlet of the braking chamber. The baffle has a groove with a through hole for delivering low-pressure gas. When the pressure of the delivered gas increases abnormally, the airflow will drive the steel column into the groove on the baffle, blocking the gas passage and shutting off the gas supply.

[0019] Furthermore, the pressure reduction system, feedback pressure regulation system, and braking system are all connected to the valve body via threaded connections.

[0020] Furthermore, a filter screen is provided at the front end of the air intake channel to filter impurities in the high-pressure gas.

[0021] Compared with the prior art, the significant advantages of the present invention are: (1) simple structure. Due to the use of a pressure regulating valve core and feedback channel clearance fit, adjustment part and valve body threaded connection, and pressure reducing valve core and valve body threaded connection, the valve core used for pressure regulation and pressure reduction in the present invention can be easily separated from the valve body, which is convenient for replacement and maintenance. This makes the pressure reduction effect controllable, the operation and maintenance cost low, and the troubleshooting convenient; (2) the braking system is set to cut off when the flow rate is large or the pressure reduction fails, which improves the safety of the system. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a feedback-type gas pressure reducing valve according to the present invention.

[0023] Figure 2 This is a schematic diagram of the pressure regulating seat in an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the braking system in an embodiment of the present invention. Detailed Implementation

[0025] It is readily understood that, based on the technical solution of this invention, those skilled in the art can conceive of various embodiments of this invention without altering its essential spirit. Therefore, the following specific embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of this invention or as limitations or restrictions on its technical solution.

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0027] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0029] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0030] Combination Figures 1-3 The present invention provides a feedback gas pressure reducing valve, comprising an intake channel 1, a pressure reducing system 2, a feedback pressure regulating system 3, a braking system 4, an outlet channel 5, and a valve body 6.

[0031] The air intake channel 1 is used to input high-pressure fuel gas;

[0032] The pressure reduction system 2 is used to reduce the pressure of the high-pressure gas input from the intake channel 1 into the low-pressure gas required by the downstream gas-using equipment.

[0033] The feedback pressure regulating system 3 is used to perform feedback regulation based on the pressure of the high-pressure gas input into the intake channel 1, and control the gas pressure output by the pressure reduction system.

[0034] The braking system 4 is used to block the flow of gas in the event of pressure reduction failure or abnormal input pressure.

[0035] The gas outlet channel 5 is used to output depressurized low-pressure gas;

[0036] The valve body 6 is the main body of the gas pressure reducing valve, used to install various components and provide a system framework for each component.

[0037] As a specific example, the pressure-reducing system 2 includes a pressure-reducing valve seat 2-1, a pressure-reducing valve core 2-2, and a pressure-reducing chamber 2-3;

[0038] The pressure reducing valve seat 2-1 is connected to the air intake channel 1, receives the high-pressure gas delivered by the air intake channel 1, and outputs it to the braking system 4 after pressure reduction.

[0039] The pressure reducing valve seat 2-1 is provided with a conical groove at the output position, and the pressure reducing valve core 2-2 is provided with a conical protrusion. The feedback pressure regulating system 3 controls the gap between the conical groove of the pressure reducing valve seat 2-1 and the conical protrusion of the pressure reducing valve core 2-2 by controlling the amount of gas entering the pressure reducing chamber 2-3, thereby achieving gas pressure reduction.

[0040] As a specific example, the feedback pressure regulating system 3 includes a feedback channel 3-1, a pressure regulating seat 3-2, a pressure regulating valve core 3-3, a pressure regulating bolt 3-4, a venting channel 3-5, a pressure regulating channel 3-6, a spring 3-7, and a diaphragm 3-8;

[0041] The feedback channel 3-1 is connected to the intake channel 1 to receive the high-pressure gas supplied by the intake channel 1; the feedback channel 3-1 is connected to the pressure regulating seat 3-2 to supply the high-pressure gas to the inside of the pressure regulating seat 3-2; the output hole of the pressure regulating seat 3-2 is connected to the pressure regulating channel 3-6; the size of the output hole of the pressure regulating seat 3-2 is adjusted by the pressure regulating valve core 3-3 and the pressure regulating bolt 3-4 to control the amount of high-pressure gas supplied to the pressure regulating channel 3-6; the pressure regulating channel 3-6 is connected to the pressure reducing chamber 2-3, and a spring 3-7 is installed inside the pressure reducing chamber 2-3. The diaphragm 3-8 is installed at the rear end of the pressure-reducing valve core 2-2, dividing the pressure-reducing chamber 2-3 into a high-pressure chamber and a low-pressure chamber. Under the action of high-pressure gas and spring 3-7, the high-pressure chamber adjusts the distance between the conical groove of the pressure-reducing valve seat 2-1 and the conical protrusion of the pressure-reducing valve core 2-2 to control the amount of gas entering the pressure-reducing chamber 2-3. The valve body 6 is provided with a venting channel 3-5 connected to the pressure regulating channel 3-6, which is used to vent the gas in the high-pressure chamber to the low-pressure chamber, reduce the gas pressure in the high-pressure chamber, and maintain the system pressure balance.

[0042] As a specific example, the braking system 4 includes a braking cavity 4-1, a guide vane 4-2, a steel column 4-3, and a baffle 4-4;

[0043] The braking chamber 4-1 receives the low-pressure gas supplied by the pressure-reducing system 2 and delivers it to the outlet channel 5 for output. A guide plate 4-2 is provided at the inlet of the braking chamber 4-1 to prevent gas backflow. A steel column 4-3 and a baffle 4-4 are provided at the outlet of the braking chamber 4-1. The baffle 4-4 has a groove with a through hole for delivering low-pressure gas. In practical applications, the downstream end of the pressure-reducing valve is generally a gas-using device. The operating conditions of the gas-using device are more complex than those of the upstream pipeline of the pressure-reducing valve. For example, its own vibration, frequent pressure fluctuations in the downstream pipeline, and gas-using device failures may all cause failures in the downstream pipeline or gas-using device. The steel column 4-3 is located at the front end of the groove of the baffle 4-4. When the seal at the downstream end of the pressure-reducing valve fails, or when the pressure-reducing part or equipment fails, if the flow rate in the outlet channel suddenly increases, the steel column 4-3 moves towards the side of the baffle 4-4 under the impact of the airflow. The airflow carries the steel column 4-3 into the groove on the baffle 4-4, blocking the gas passage and shutting off the gas.

[0044] As a specific example, the pressure reduction system 2, the feedback pressure regulation system 3, and the braking system 4 are all connected to the valve body 6 through a threaded connection structure.

[0045] As a specific example, a filter screen is provided at the front end of the air intake channel 1 to filter impurities in the high-pressure gas.

[0046] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, other embodiments derived without departing from the technical solution of the present invention should be included within the scope of protection of the present invention.

Claims

1. A feedback gas pressure reducing valve, characterized by, It includes an intake passage (1), a pressure reduction system (2), a feedback pressure regulation system (3), a braking system (4), an exhaust passage (5), and a valve body (6); The air intake channel (1) is used to input high-pressure gas; The pressure reduction system (2) is used to reduce the pressure of the high-pressure gas input into the intake channel (1) into the low-pressure gas required by the downstream gas-using equipment; The feedback pressure regulating system (3) is used to adjust the pressure of the high-pressure gas input into the intake channel (1) and control the gas pressure output by the pressure reduction system. The braking system (4) is used to block the flow of gas in the event of pressure reduction failure or abnormal input pressure. The braking system (4) includes a braking cavity (4-1), a guide plate (4-2), a steel column (4-3), and a baffle (4-4). The braking cavity (4-1) receives the low-pressure gas delivered by the pressure reduction system (2) and delivers it to the gas outlet channel (5) for output. A guide plate (4-2) is provided at the inlet of the braking cavity (4-1) to prevent gas backflow. A steel column (4-3) and a baffle (4-4) are provided at the outlet of the braking cavity (4-1). A groove is provided on the baffle (4-4), and a through hole is provided in the groove for delivering low-pressure gas. When the pressure of the delivered gas increases abnormally, the airflow drives the steel column (4-3) into the groove on the baffle (4-4), blocking the gas passage and achieving gas shut-off. The gas outlet channel (5) is used to output depressurized low-pressure gas; The valve body (6) is the main body of the gas pressure reducing valve, used to install various components and provide a system framework for each component.

2. The feedback gas pressure reducing valve according to claim 1, characterized by The pressure reduction system (2) includes a pressure reduction valve seat (2-1), a pressure reduction valve core (2-2), and a pressure reduction chamber (2-3). The pressure reducing valve seat (2-1) is connected to the air intake channel (1) to receive the high-pressure gas delivered by the air intake channel (1), and after pressure reduction, it is output to the braking system (4). The pressure reducing valve seat (2-1) is provided with a conical groove at the output position, and the pressure reducing valve core (2-2) is provided with a conical convex groove. The feedback pressure regulating system (3) controls the gap between the conical groove of the pressure reducing valve seat (2-1) and the conical convex groove of the pressure reducing valve core (2-2) by the magnitude of the gas pressure delivered, thereby adjusting the amount of gas entering the pressure reducing chamber (2-3) and realizing gas pressure reduction.

3. The feedback gas pressure reducing valve according to claim 2, characterized by The feedback pressure regulating system (3) includes a feedback channel (3-1), a pressure regulating seat (3-2), a pressure regulating valve core (3-3), a pressure regulating bolt (3-4), a venting channel (3-5), a pressure regulating channel (3-6), a spring (3-7), and a diaphragm (3-8). The feedback channel (3-1) is connected to the intake channel (1) to receive the high-pressure gas supplied by the intake channel (1); the feedback channel (3-1) is connected to the pressure regulating seat (3-2) to supply the high-pressure gas to the inside of the pressure regulating seat (3-2). The output hole of the pressure regulating seat (3-2) is connected to the pressure regulating channel (3-6). The size of the output hole of the pressure regulating seat (3-2) is adjusted by the pressure regulating valve core (3-3) and the pressure regulating bolt (3-4) to control the amount of high-pressure gas supplied to the pressure regulating channel (3-6); the pressure regulating channel (3-6) is connected to the pressure reducing chamber (2-3), and a spring is installed inside the pressure reducing chamber (2-3). (3-7) and diaphragm (3-8), the diaphragm (3-8) is installed at the rear end of the pressure reducing valve core (2-2) to divide the pressure reducing chamber (2-3) into a high-pressure chamber and a low-pressure chamber. Under the action of high-pressure gas and spring (3-7), the high-pressure chamber adjusts the distance between the conical groove of the pressure reducing valve seat (2-1) and the conical protrusion of the pressure reducing valve core (2-2) to control the amount of gas entering the pressure reducing chamber (2-3); the valve body (6) is provided with a venting channel (3-5) connected to the pressure regulating channel (3-6) to vent the gas in the high-pressure chamber to the low-pressure chamber, reduce the gas pressure in the high-pressure chamber, and maintain the system pressure balance.

4. The feedback-type gas pressure reducing valve according to claim 1, characterized in that, The pressure reduction system (2), the feedback pressure regulation system (3), and the braking system (4) are all connected to the valve body (6) through a threaded connection structure.

5. The feedback-type gas pressure reducing valve according to claim 1, characterized in that, The intake channel (1) is equipped with a filter screen at the front end to filter impurities in the high-pressure gas.

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