Full-automatic precise gas pressure regulating device

Abstract

The utility model relates to the technical field of gas pressure regulation, and discloses a full-automatic precise gas pressure regulating device, which comprises a valve body provided with a gas inlet runner, a gas outlet runner and a valve port; the valve port is connected with the air inlet flow channel and the air outlet flow channel; the valve rod is arranged in the valve body and can move in the axial direction of the valve body; a valve clack is arranged at the bottom of the valve rod; along with the movement of the valve clack, the flow passing through the valve port is adjusted; the diaphragm is arranged on the valve rod in a sleeving manner, and an upper pressure regulating space is separated in the valve body; gas is injected into the upper pressure regulating space, so that the diaphragm drives the valve rod to move; the elastic piece is used for driving the valve rod to rebound; the valve body is provided with a pressure adjusting opening communicated with the upper pressure adjusting space. According to the technical scheme, the technical problem that in the prior art, a pressure regulating device is difficult to control accurately is solved.

Description

Technical Field

[0001] This utility model relates to the field of gas pressure regulation technology, and in particular to a fully automatic gas precision pressure regulation device. Background Technology

[0002] A pressure regulating device can adjust the gas pressure to achieve the stable state required for testing. Pressure is a crucial parameter in gas testing, directly affecting test parameters such as gas flow rate, temperature, and concentration. A pressure regulating device ensures that the gas pressure remains constant during the test, thus avoiding test errors caused by pressure fluctuations.

[0003] Some existing pressure regulating devices may have limitations in flow control, only achieving coarse flow regulation and making fine control difficult. Utility Model Content

[0004] This utility model discloses a fully automatic gas pressure regulating device to solve the technical problem that pressure regulating devices are difficult to control precisely in related technologies.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A fully automatic gas pressure regulating device, comprising:

[0007] The valve body has an inlet air passage, an outlet air passage, and a valve port; the valve port connects the inlet air passage and the outlet air passage.

[0008] A valve stem is disposed within the valve body and is movable along the axial direction of the valve body; a valve disc is disposed at the bottom of the valve stem; as the valve disc moves, the flow rate through the valve port is adjusted.

[0009] A diaphragm is fitted onto the valve stem and creates an upper pressure regulating space within the valve body; by injecting gas into the upper pressure regulating space, the diaphragm drives the valve stem to move.

[0010] An elastic element is used to drive the valve stem to spring back;

[0011] The valve body has a pressure regulating port that connects to the upper pressure regulating space.

[0012] In a further technical solution, a solenoid valve is also included, wherein the outlet of the solenoid valve is connected to the pressure regulating port via a pipe.

[0013] The air inlet of the solenoid valve is connected to an air source via a pipe.

[0014] In a further technical solution, the valve disc is located below the valve port;

[0015] As the valve disc moves downward, the valve port gradually opens; as the valve disc moves upward, the valve port gradually closes.

[0016] In a further technical solution, the elastic element is connected to the bottom of the valve disc and the inner wall of the valve body.

[0017] In a further technical solution, a guide rod extends from the bottom of the valve disc along its own axial direction, and a guide groove is provided on the inner wall of the valve body, the guide groove extending along the axial direction of the valve body;

[0018] The guide rod is embedded in the guide groove and can move along the extension direction of the guide groove.

[0019] In a further technical solution, the elastic element is a spring.

[0020] In a further technical solution, the valve stem is slidably disposed within the valve body, and the valve body is divided into an upper valve body and a lower valve body;

[0021] The inlet air passage, the outlet air passage, and the valve port are disposed in the lower valve body;

[0022] The diaphragm separates the upper valve body, forming the upper pressure regulating space and the lower pressure regulating space;

[0023] The lower valve body has a pressure regulating channel that connects the outlet air passage and the lower pressure regulating space.

[0024] The technical solution adopted in this utility model can achieve the following beneficial effects:

[0025] In this precise pressure regulating device, gas flows in through the inlet channel of the valve body, passes through the valve port, and flows out through the outlet channel. The valve stem can move axially along the valve body, causing the valve disc to move closer to or further away from the valve port to regulate the flow rate. During flow regulation, when the gas pressure is greater than the elastic force of the elastic element, the diaphragm drives the valve stem and valve disc to gradually open the valve port; when the gas pressure is less than the elastic force of the elastic element, the elastic element drives the valve stem and valve disc to return to their original position and gradually close the valve port. By precisely controlling the flow rate of gas entering the upper pressure regulating space, the size of the valve opening is precisely controlled, thereby achieving precise flow control. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a cross-sectional view of the valve body of this utility model;

[0028] Figure 2 This is a schematic diagram of the precision pressure regulating device of this utility model.

[0029] In the picture:

[0030] 10-Valve body, 10a-Inlet air passage, 10b-Outlet air passage, 10c-Valve port, 10d-Upper pressure regulating space, 10e-Pressure regulating port, 10f-Pressure regulating channel, 10g-Pressure relief port, 10h-Lower pressure regulating space, 11-Valve stem, 12-Valve disc, 121-Guide rod, 13-Elastic element, 14-Diaphragm, 15-Guide groove, 16-Lower valve body, 17-Upper valve body, 20-Solenoid valve. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] In the various embodiments of this application, "near end" and "far end" refer to the distance of each component from the user in the usage environment. The end closer to the user is designated as the "near end", and the end farther from the user is designated as the "far end".

[0034] A fully automatic gas pressure regulating device, please refer to Figures 1-2 It includes a valve body 10, a valve stem 11, a diaphragm 14, an elastic element 13, and a solenoid valve 20.

[0035] like Figure 1As shown, the valve body 10 has an inlet flow channel 10a, an outlet flow channel 10b, and a valve port 10c, which connects the inlet flow channel 10a and the outlet flow channel 10b. Gas enters the valve body 10 through the inlet flow channel 10a, passes through the valve port 10c, and flows out through the outlet flow channel 10b. The valve port 10c is a key component for controlling the flow rate of the valve body 10; by changing the size of the valve port 10c, the flow rate of the valve body 10 can be controlled.

[0036] like Figure 1 As shown, the valve stem 11 is disposed within the valve body 10 and can move axially along the valve body 10. A valve disc 12 is disposed at the bottom of the valve stem 11. As the valve stem 11 moves within the valve body 10, it causes the valve disc 12 to move away from or towards the valve port 10c. As the valve disc 12 moves away from the valve port 10c, the valve port 10c gradually opens; as the valve disc 12 moves towards the valve port 10c, the valve port 10c gradually closes; when the valve disc 12 abuts against the valve port 10c, the valve port 10c is completely closed, at which point the flow rate within the valve body 10 is zero.

[0037] Specifically, in this embodiment, the valve disc 12 is located below the valve port 10c. As the valve disc 12 moves away from the valve port 10c, that is, as the valve disc 12 moves downward, the valve port 10c gradually opens and the flow rate gradually increases; as the valve disc 12 moves closer to the valve port 10c, that is, as the valve disc 12 moves upward, the valve port 10c gradually closes and the flow rate gradually decreases.

[0038] More specifically, such as Figure 1 As shown, a guide rod 121 extends axially from the bottom of the valve disc 12, and a guide groove 15 extends axially from the inner wall of the valve body 10. The guide rod 121 is embedded in the guide groove 15 and can move along the extension direction of the guide groove 15. By embedding the guide rod 121 in the guide groove 15, the guide groove 15 guides the movement of the valve stem 11 and the valve disc 12 along the axial direction of the valve body 10, ensuring smooth movement of the valve stem 11.

[0039] like Figure 1 As shown, the elastic element 13 is used to drive the valve stem 11 to rebound. During flow regulation, when the gas pressure is greater than the elastic force of the elastic element 13, the diaphragm 14 drives the valve stem 11 and valve disc 12 to gradually open the valve port 10c; when the gas pressure is less than the elastic force of the elastic element 13, the elastic element 13 drives the valve stem 11 and valve disc 12 to return to their original position and gradually close the valve port 10c. Therefore, the elastic element 13 helps to close the valve port 10c.

[0040] In this embodiment, as Figure 1As shown, the elastic element 13 is connected to the bottom of the valve disc 12 and the inner wall of the valve body 10. When the gas pressure is greater than the elastic force of the elastic element 13, the valve disc 12 presses the elastic element 13 downward, causing the elastic element 13 to store elastic potential energy; when the gas pressure is less than the elastic force of the elastic element 13, the elastic element 13 releases the elastic potential energy, driving the valve stem 11 and the valve disc 12 to return to their original positions.

[0041] In addition, by selecting a suitable elastic element 13 for the through hole, the opening threshold of the valve port 10c can be controlled.

[0042] In this embodiment, the elastic element 13 is preferably a spring. However, the elastic element 13 can also be an elastic sheet or the like.

[0043] like Figure 1 As shown, the diaphragm 14 is fitted onto the valve stem 11 and creates an upper pressure regulating space 10d within the valve body 10. The valve body 10 has a pressure regulating port 10e communicating with the upper pressure regulating space 10d. By repeatedly injecting very small amounts of gas into the upper pressure regulating space 10d, the pressure of the gas in the upper pressure regulating space 10d slowly increases and exceeds the elastic force of the elastic element 13, thereby opening the valve port 10c. Furthermore, because of the repeated injection of very small amounts of gas into the upper pressure regulating space 10d, the valve port 10c only opens slightly after each injection, thus precisely controlling the flow rate through the valve port 10c.

[0044] Correspondingly, the valve body 10 also has a pressure relief port 10g that communicates with the upper pressure regulating space 10d, for discharging gas from the upper pressure regulating space 10d. The pressure relief port 10g is normally closed, but can be opened as needed to release pressure and exhaust gas from the upper pressure regulating space 10d.

[0045] Specifically, such as Figure 1 and Figure 2 As shown, the outlet of the solenoid valve 20 is connected to the pressure regulating port 10e via a pipe, and the inlet of the solenoid valve 20 is connected to a gas source via a pipe. The pressure-regulating gas from the gas source enters the upper pressure regulating space 10d sequentially through the solenoid valve 20 and the pressure regulating port 10e to regulate the gas pressure in the valve body 10. By precisely controlling the amount of gas injected, the solenoid valve 20 can maintain stable pressure in the upper pressure regulating space 10d within the valve body 10. Furthermore, due to the fast response speed and high control precision of the solenoid valve 20, rapid and accurate flow rate regulation can be achieved.

[0046] like Figure 1 and Figure 2As shown, the valve stem 11 is slidably disposed within the valve body 10, dividing the valve body 10 into an upper valve body 17 and a lower valve body 16. Specifically, a sliding portion is provided within the valve body 10 along its own axial direction, and the valve stem 11 is slidably fitted into the sliding portion, separating the upper and lower halves of the valve body 10 to form the upper valve body 17 and the lower valve body 16. The inlet air passage 10a, the outlet air passage 10b, and the valve port 10c are disposed within the lower valve body 16.

[0047] like Figure 1 and Figure 2 As shown, diaphragm 14 separates the interior of upper valve body 17, forming upper pressure regulating space 10d and lower pressure regulating space 10h. Lower valve body 16 has a pressure regulating channel connecting outlet gas passage 10b and lower pressure regulating space 10h. As gas passes through valve port 10c and outlet gas passage 10b, it applies pressure to lower pressure regulating space 10h through the pressure regulating channel, thereby exerting an upward force on diaphragm 14, which balances or counteracts the downward force generated by the gas injected into the pressure regulating space. This design allows diaphragm 14 to function as a pressure-responsive element, controlling the opening and closing of the valve according to pressure changes, while simultaneously increasing the stability and reliability of the system.

[0048] Specifically, the pressure at valve port 10c can be used as the feedback pressure of the device. The system automatically controls the solenoid valve 20 to open based on the pressure feedback at valve port 10c, supplying air to the pressure regulating port 10e, and then into the upper pressure regulating space 10d to regulate the flow rate of valve body 10.

[0049] The working principle of this embodiment is as follows:

[0050] Gas flows in through the inlet channel of valve body 10, passes through valve port 10c, and flows out through the outlet channel of valve body 10. Valve stem 11 can move axially along valve body 10, causing valve disc 12 to move closer to or further away from valve port 10c to regulate flow. During flow regulation, solenoid valve 20 controls gas to enter the upper pressure regulating space 10d in very small amounts multiple times to slowly increase the gas pressure in the upper pressure regulating space 10d. When the gas pressure is greater than the elastic force of elastic element 13, diaphragm 14 drives valve stem 11 and valve disc 12 to gradually open valve port 10c; when the gas pressure is less than the elastic force of elastic element 13, elastic element 13 drives valve stem 11 and valve disc 12 to return to their original position and gradually close valve port 10c.

[0051] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0052] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0053] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A fully automatic gas precision pressure regulating device, characterized in that, include: The valve body has an inlet air passage, an outlet air passage, and a valve port; the valve port connects the inlet air passage and the outlet air passage. A valve stem is disposed within the valve body and is movable along the axial direction of the valve body; a valve disc is disposed at the bottom of the valve stem; as the valve disc moves, the flow rate through the valve port is adjusted. A diaphragm is fitted onto the valve stem and creates an upper pressure regulating space within the valve body; by injecting gas into the upper pressure regulating space, the diaphragm drives the valve stem to move. An elastic element is used to drive the valve stem to spring back; The valve body has a pressure regulating port that communicates with the upper pressure regulating space; It also includes a solenoid valve, the outlet of which is connected to the pressure regulating port via a pipe; The air inlet of the solenoid valve is connected to an air source via a pipe.

2. The fully automatic gas precision pressure regulating device according to claim 1, characterized in that, The valve disc is located below the valve port; As the valve disc moves downward, the valve port gradually opens; as the valve disc moves upward, the valve port gradually closes.

3. The fully automatic gas precision pressure regulating device according to claim 2, characterized in that, The elastic element is connected to the bottom of the valve disc and the inner wall of the valve body.

4. The fully automatic gas precision pressure regulating device according to claim 2, characterized in that, The bottom of the valve disc has a guide rod extending along its own axis, and the inner wall of the valve body is provided with a guide groove, which extends along the axial direction of the valve body; The guide rod is embedded in the guide groove and can move along the extension direction of the guide groove.

5. A fully automatic gas precision pressure regulating device according to claim 1 or 3, characterized in that, The elastic element is a spring.

6. The fully automatic gas precision pressure regulating device according to claim 1, characterized in that, The valve stem is slidably disposed in the valve body, dividing the valve body into an upper valve body and a lower valve body; The inlet air passage, the outlet air passage, and the valve port are disposed in the lower valve body; The diaphragm separates the upper valve body, forming the upper pressure regulating space and the lower pressure regulating space; The lower valve body has a pressure regulating channel that connects the outlet air passage and the lower pressure regulating space.

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