Pressure reducing and stabilizing structure of gas control valve

Abstract

The utility model relates to the technical field of valve bodies, and discloses a pressure reducing and stabilizing structure of a gas control valve, which comprises a valve body, a mounting cylinder communicated with the valve body, a valve core slidably connected in the mounting cylinder, a cylinder cover arranged at one end of the mounting cylinder away from the valve body, and a pressure regulating spring mounted in the cylinder cover. The free end of the pressure adjusting spring is connected with the valve element, a diaphragm is arranged at the end, away from the valve body, of the valve element, the diaphragm and the cylinder cover jointly form a pressure sensing cavity, the pressure adjusting spring is arranged in the pressure sensing cavity, and an air pipe is communicated between an exhaust port of the valve body and the pressure sensing cavity. The device solves the problem that the oxygen supply amount cannot be automatically adjusted when the oxygen demand amount of a user changes, the oxygen supply amount is automatically adjusted according to the air pressure at the exhaust port, the comfort degree is improved, and waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, and more particularly to a pressure reducing and stabilizing structure of a gas control valve. Background Art

[0002] Oxygen supply systems typically require a gas control valve to reduce the pressure of the gas in the cylinder for user use. To ensure user comfort, the gas control valve must meet stringent requirements for pressure reduction and stabilization.

[0003] Existing valve bodies on the market often use a spring and a valve core to control the opening of the vent to achieve pressure reduction. The outlet air pressure is adjusted by changing the spring preload. The output air pressure is stable, but when the oxygen supply device is used, the amount of oxygen required by the user is not constant. The existing stable oxygen supply device is prone to insufficient oxygen supply or waste of oxygen during use. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a pressure reducing and stabilizing structure for a gas control valve with outlet gas pressure control.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A pressure reducing and stabilizing structure for a gas control valve comprises a valve body, the valve body is connected to a mounting cylinder, a valve core is slidably connected to the mounting cylinder, a cylinder cover is provided at the end of the mounting cylinder facing away from the valve body, a pressure regulating spring is installed in the cylinder cover, the free end of the pressure regulating spring is connected to the valve core, a diaphragm is provided at the end of the valve core facing away from the valve body, the diaphragm and the cylinder cover together form a pressure sensing chamber, the pressure regulating spring is provided in the pressure sensing chamber, and an air pipe is connected between the exhaust port of the valve body and the pressure sensing chamber.

[0007] The utility model is further configured as follows: one side of the valve body is an air inlet, and the other side of the valve body is an exhaust port, the air inlet and the exhaust port are connected via an air vent, the air vent is configured as a frustum-shaped hole, and the valve core can be sealed with the air vent.

[0008] The utility model is further configured as follows: the installation cylinder includes a cylinder body, the cylinder body is connected to the vent and the exhaust port at the same time, a partition is installed in the cylinder body, the partition and the vent are coaxially arranged, a sealing member is installed in the center of the partition, and the valve core is slidably connected to the sealing member.

[0009] The utility model is further configured as follows: the valve core includes a connecting rod, the connecting rod is coaxially slidably connected to the partition, the connecting rod seal is sealed, and a piston head is provided at one end of the connecting rod facing the vent hole, the piston head is frustum-shaped, and the piston head can be sealed with the vent hole.

[0010] The utility model is further configured as follows: the other end of the connecting rod points to the pressure sensing chamber and is provided with a push plate, the pressure regulating spring is connected to the push plate, the diaphragm is connected to the push plate, and the push plate, the diaphragm and the cylinder cover together form the pressure sensing chamber.

[0011] The advantages of the utility model are:

[0012] A push plate and a diaphragm are provided at the end of the valve core. The push plate, the diaphragm and the cylinder cover together form a pressure-sensing chamber. The pressure-regulating spring is provided in the pressure-sensing chamber. The pressure-sensing chamber is connected to the exhaust port of the valve body through an air pipe, so that the air pressure in the pressure-sensing chamber is the same as the air pressure at the exhaust port. When the required oxygen supply increases, the air pressure at the exhaust port decreases, and the air pressure in the pressure-sensing chamber decreases synchronously, sucking the diaphragm and the push plate upward, thereby pulling the piston head away from the vent, and the vent opening becomes larger. More gas at the air inlet enters the exhaust port, balancing the air pressure at the exhaust port and increasing the oxygen supply. On the contrary, when the required oxygen supply decreases, the vent opening is automatically adjusted by the exhaust port pressure to adapt to the oxygen supply demand, thereby improving the user's comfort and reducing oxygen waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0014] Figure 2 For the Figure 1 The AA line cross-section shown;

[0015] In the figure: 1. Valve body; 11. Air inlet; 12. Exhaust port; 13. Vent; 2. Mounting cylinder; 21. Cylinder body; 22. Partition plate; 23. Seal; 24. Cylinder cover; 25. Pressure-sensing chamber; 3. Air pipe; 4. Valve core; 41. Connecting rod; 42. Piston head; 43. Push plate; 44. Diaphragm; 5. Pressure-regulating spring. DETAILED DESCRIPTION

[0016] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0017] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by one of ordinary skill in the art to which this application relates.

[0018] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually relative to the directions shown in the drawings, or relative to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually relative to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned direction words are not used to limit the present invention.

[0019] See also Figure 1-2 , the utility model provides the following technical solutions:

[0020] A pressure reducing and stabilizing structure for a gas control valve includes a valve body 1, with an air inlet 11 and an air outlet 12 at both ends of the valve body 1, and the air inlet 11 and the air outlet 12 are connected through a vent hole 13;

[0021] The valve body 1 is connected to a mounting cylinder 2, which includes a cylinder body 21. The cylinder body 21 is connected to both the vent hole 13 and the exhaust port 12. A partition 22 is coaxially mounted on the inner side of the cylinder body 21. A seal 23 is mounted at the center of the partition 22. The inner ring of the seal 23 is sealed with a valve core 4. The valve core 4 can slide axially on the seal 23, but the partition 22 and the seal 23 have a sealing effect, which can prevent the gas on the side of the partition 22 facing the valve body 1 from entering the other side of the partition 22.

[0022] The side of the valve core 4 facing the vent 13 can be sealed with the vent 13, and the other end of the valve core 4 passes through the partition 22 and is connected to the pressure-regulating spring 5. When the air pressure at the air inlet 11 is higher than the preset value, the force of the pressure-regulating spring 5 is overcome, the valve core 4 is pushed upward, and the vent 13 is opened. At this time, the air flow can enter the exhaust port 12 from the air inlet 11 through the vent 13, thereby realizing the delivery of oxygen.

[0023] The end of the mounting cylinder 2 facing away from the valve body 1 is provided with a cylinder cover 24, the pressure regulating spring 5 is installed in the cylinder cover 24, the end of the valve core 4 facing away from the valve body 1 is provided with a diaphragm 44, the diaphragm 44 and the cylinder cover 24 together form a pressure sensing chamber 25, the exhaust port 12 of the valve body 1 and the pressure sensing chamber 25 are connected by an air pipe 3, when the amount of oxygen required by the user changes, the air pressure at the exhaust port 12 changes, thereby driving the air pressure in the pressure sensing chamber 25 to change synchronously, when the air pressure in the pressure sensing chamber 25 increases, the diaphragm 44 and the valve core 4 are pushed downward, causing the valve core 4 to move upward. When the air in the pressure sensing chamber 25 moves in the direction of the vent 13, the opening of the vent 13 becomes smaller; when the air pressure in the pressure sensing chamber 25 decreases, the diaphragm 44 and the valve core 4 are sucked upward, causing the valve core 4 to move to the side away from the vent 13. At this time, the opening of the vent 13 becomes larger, and the gas in the air inlet 11 is accelerated to enter the exhaust port 12, thereby increasing the output of the exhaust port 12, thereby increasing the oxygen supply, ensuring that the user's needs are met, and improving the user's comfort. When the required oxygen supply decreases, the action is opposite, reducing the supply of oxygen and reducing consumption.

[0024] The vent hole 13 is set as a frustum-shaped hole, and the valve core 4 includes a connecting rod 41, which is coaxially slidably connected to the partition 22, and is sealed with the sealing member 23. A piston head 42 is provided at one end of the connecting rod 41 facing the vent hole 13, and the piston head 42 is frustum-shaped. The piston head 42 can be sealed with the vent hole 13. When the piston head 42 is at different distances from the vent hole 13, the opening of the vent hole 13 changes, thereby changing the oxygen supply by adjusting the opening of the vent hole 13.

[0025] The other end of the connecting rod 41 points to the pressure-sensing chamber 25 and is provided with a push plate 43. The pressure-regulating spring 5 is connected to the push plate 43, and the diaphragm 44 is connected to the push plate 43. The push plate 43, the diaphragm 44 and the cylinder cover 24 together form the pressure-sensing chamber 25. The pressure-sensing chamber 25 is only connected to the exhaust port 12, thereby ensuring the synchronization of the air pressure in the pressure-sensing chamber 25 and the air pressure at the exhaust port 12.

[0026] Specifically, the working principle of this embodiment is: the pressure-sensing chamber 25 is connected to the exhaust port 12 of the valve body 1 through the trachea 3, so that the air pressure in the pressure-sensing chamber 25 is the same as the air pressure at the exhaust port 12. When the required oxygen supply increases, the user inhales more, the air pressure at the exhaust port 12 decreases, and the air pressure in the pressure-sensing chamber 25 decreases synchronously, sucking the diaphragm 44 and the push plate 43 upward, thereby pulling the piston head 42 away from the vent 13, that is, the opening of the vent 13 becomes larger, and more gas at the air inlet 11 enters the exhaust port 12, balancing the air pressure at the exhaust port 12 and increasing the oxygen supply. On the contrary, when the required oxygen supply decreases, the opening of the vent 13 can be automatically adjusted by the air pressure at the exhaust port 12 to adapt to the oxygen supply demand, thereby improving the user's comfort and reducing oxygen waste.

[0027] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0029] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar pairs of elements and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pressure reducing and stabilizing structure for a gas control valve, comprising a valve body (1), characterized in that: The valve body (1) is connected to a mounting cylinder (2), a valve core (4) is slidably connected in the mounting cylinder (2), a cylinder cover (24) is provided at one end of the mounting cylinder (2) away from the valve body (1), a pressure regulating spring (5) is installed in the cylinder cover (24), the free end of the pressure regulating spring (5) is connected to the valve core (4), a diaphragm (44) is provided at one end of the valve core (4) away from the valve body (1), the diaphragm (44) and the cylinder cover (24) together form a pressure sensing chamber (25), the pressure regulating spring (5) is provided in the pressure sensing chamber (25), and an air pipe (3) is connected between the exhaust port (12) of the valve body (1) and the pressure sensing chamber (25).

2. The pressure reducing and stabilizing structure of a gas control valve according to claim 1, characterized in that: One side of the valve body (1) is an air inlet (11), and the other side of the valve body (1) is an air outlet (12). The air inlet (11) and the air outlet (12) are connected via an air vent (13). The air vent (13) is configured as a frustum-shaped hole, and the valve core (4) can be sealed with the air vent (13).

3. The pressure reducing and stabilizing structure of a gas control valve according to claim 2, characterized in that: The installation cylinder (2) comprises a cylinder body (21), the cylinder body (21) is connected to the vent hole (13) and the exhaust port (12) at the same time, a partition (22) is installed in the cylinder body (21), the partition (22) and the vent hole (13) are coaxially arranged, a sealing member (23) is installed at the center of the partition (22), and the valve core (4) is slidably connected to the sealing member (23).

4. The pressure reducing and stabilizing structure of a gas control valve according to claim 3, characterized in that: The valve core (4) includes a connecting rod (41), the connecting rod (41) is coaxially slidably connected to the partition (22), the connecting rod (41) is sealed with a sealing member (23), and a piston head (42) is provided at one end of the connecting rod (41) facing the vent hole (13), the piston head (42) is in a frustum shape, and the piston head (42) can be sealed with the vent hole (13).

5. The pressure reducing and stabilizing structure of a gas control valve according to claim 4, characterized in that: The other end of the connecting rod (41) points to the pressure-sensing chamber (25) and is provided with a push plate (43). The pressure-regulating spring (5) is connected to the push plate (43). The diaphragm (44) is connected to the push plate (43). The push plate (43), the diaphragm (44) and the cylinder cover (24) together form the pressure-sensing chamber (25).

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