A flap-type gas distribution valve

Abstract

This utility model discloses a flap-type gas distribution valve, including a valve body and two pilot gas paths. Each pilot gas path includes a first pilot gas port and a second pilot gas port, as well as a drive assembly for controlling the opening or closing of the first and second pilot gas ports. The drive assembly includes: a piston chamber, laterally disposed on the valve body, with a first opening and a second opening; a piston rod, sliding within the piston chamber and equipped with a first sealing piston and a second sealing piston; a spring between the inner end of the piston rod and the piston chamber, and the outer end of the piston rod penetrating the piston chamber and extending to its outside; a pressure relief hole on the piston chamber at the inner end of the piston rod; and a rotating shaft, perpendicularly intersecting between the outer ends of the two piston rods; a pressure block disposed on the rotating shaft and extending radially along the rotating shaft; and a drive motor connected to the rotating shaft. This utility model improves the stability of the gas distribution valve and reduces energy consumption during operation by setting up a drive assembly.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a flap-type gas distribution valve. Background Technology

[0002] The gas distribution valve is one of the most critical control valves in a pressure swing adsorption (PSA) oxygen generator. It connects to the compressor and the adsorption cylinder, and is used to deliver the high-pressure gas output from the compressor to the adsorption cylinder to produce oxygen, and to discharge the nitrogen desorbed from the adsorption cylinder, thereby achieving oxygen-nitrogen separation in the air.

[0003] Patent CN222316033U discloses a silent gas distribution valve that controls the opening and closing of a pilot channel via a first pilot and a second pilot, thereby controlling the opening and closing of the air intake channel and the first and second oxygen-generating channels respectively. However, the first and second pilots are electromagnetic components, which will lead to a decrease in electromagnetic force and poor stability after prolonged use, affecting oxygen generation efficiency; moreover, during the oxygen generation process, the two electromagnetic components are alternately energized, resulting in high energy consumption.

[0004] To address this problem, this invention provides a stable and energy-efficient gas distribution valve. Utility Model Content

[0005] Details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects and advantages of the present application more readily apparent.

[0006] This utility model provides a flap-type gas distribution valve, which controls the opening and closing of the first pilot gas port and the second pilot gas port by setting a drive component. The drive component includes a drive motor. Compared with a solenoid valve, the drive motor increases the stability of the gas distribution valve. The drive motor is only energized for a moment during operation, resulting in low power consumption and reduced energy consumption.

[0007] This utility model discloses a flap-type gas distribution valve, including a valve body and two pilot gas paths located on the same end face of the valve body. Each pilot gas path includes a first pilot gas port and a second pilot gas port, as well as a drive assembly for controlling the opening or closing of the first and second pilot gas ports. The drive assembly includes: The piston chamber is arranged laterally on the valve body and has a first opening and a second opening corresponding to the first pilot port and the second pilot port; A piston rod slides within the piston cavity and is provided with a first sealing piston and a second sealing piston, wherein the distance between the first sealing piston and the second sealing piston is greater than the distance between the first opening and the second opening; a spring is provided between the inner end of the piston rod and the piston cavity, and the outer end of the piston rod passes through the piston cavity and extends to its outside; pressure relief holes are provided on the piston cavity on both sides of the first sealing piston and the second sealing piston. Also includes: A rotating shaft is perpendicularly intersecting between the outer ends of the two piston rods; A pressure block is disposed on the rotating shaft and extends radially along the rotating shaft; A drive motor is connected to the rotating shaft.

[0008] In some embodiments, the compression area where the pressure block abuts against the outer end of the piston rod is provided with a groove, and the groove is provided with a wear-resistant coating.

[0009] In some implementations, it also includes: The first and second pillars are located on the upper sides of the valve body; A pressure block deflection groove is formed above the valve body between the first support and the second support; A motor mounting plate is installed above the first and second pillars and is used to support the drive motor; The space for deflecting the pressure block is formed by the enclosure between the motor mounting plate, the first support, the second support, and the pressure block deflection groove.

[0010] In some implementations, it also includes: The piston chamber pressure plate is integrally formed with the motor mounting plate, and the piston chamber pressure plate has ear plates on both sides, which are pressed onto the bolt holes on the inner end side of the corresponding piston chamber.

[0011] In some embodiments, the motor mounting plate completely covers the range of motion of the pressure block and / or a protective cover is provided outside the pressure block.

[0012] In some embodiments, a slit is provided at the location where the outer end of the piston rod penetrates the piston cavity to form the pressure relief hole.

[0013] In some implementations, it also includes: Two gas chambers, each gas chamber corresponding to each pilot gas path; The gas chamber includes: The first chamber, the second chamber, and the third chamber are disposed in the valve body along the same axial direction from the valve body to the outside of the valve body, and are respectively provided with a first vent, a second vent, and a third vent that are connected to the outside. The valve stem has its middle part located in the second chamber and is provided with a first sealing element for forming an abutment seal with the air hole between the second chamber and the third chamber and a second sealing element for forming an abutment seal with the air hole between the first chamber and the second chamber, and the force-bearing end face of the first sealing element and the force-bearing end face of the second sealing element have different areas. The first pilot air port is connected to the first air hole; the second pilot air port is connected to the force-bearing end face of the first sealing element.

[0014] In some embodiments, both the first seal and the second seal are diaphragm structures, and the diaphragm structure of the second seal has an opening.

[0015] In some implementations, it also includes: A spring mounting groove is provided at the inner end of the piston rod and is used to mount the spring. The inner diameter of the spring mounting groove is smaller than the inner diameter of the piston cavity to form an annular step.

[0016] In some embodiments, the pressure relief hole on the outside of the first sealing piston is located at the outer end of the spring mounting groove.

[0017] The beneficial effects of this utility model are as follows: By setting a drive motor to drive the rotating shaft to rotate, the rotating shaft drives the pressure block to move synchronously, thereby realizing the pushing action of the pressure block on the piston rod, and thus realizing the opening and closing of the first pilot air port and the second pilot air port. Compared with the solenoid valve, it has better stability and extends the service life of the gas distribution valve. Furthermore, the drive motor only needs to be energized for a moment when driving the pressure block to rotate, which consumes less power and reduces energy consumption compared to the alternating energization of two solenoid valves for oxygen production. Moreover, this gas distribution valve is smaller in size than a gas distribution valve with two solenoid valves, which is conducive to the miniaturization of the oxygen generator. Attached Figure Description

[0018] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention from one perspective.

[0020] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective.

[0021] Figure 3 This is a cross-sectional view of the present invention. Figure 1 .

[0022] Figure 4 This is a cross-sectional view of the present invention. Figure 2 .

[0023] Figure 5 This is a cross-sectional view of the present invention. Figure 3 .

[0024] Figure 6 This is a schematic diagram of the valve stem assembly structure of this utility model. Attached image description: Piston chamber 1, first opening 11, second opening 12, pressure relief hole 13, piston chamber pressure plate 14, ear plate 15, spring mounting groove 16, pressure block deflection groove 17, piston rod 2, first sealing piston 21, second sealing piston 22, spring 3, rotating shaft 4, pressure block 5, groove 51, drive motor 6, valve body 7, first support column 71, second support column 72, motor mounting plate 73, first chamber 741, second chamber 742, third chamber 743, pilot chamber 744, first valve body 751, second valve body 752, third valve body 753, first vent 761, second vent 762, third vent 763, pilot air passage 77, valve rod 8, first seal 81, second seal 82, opening 821. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments provided by this utility model without inventive effort are within the scope of protection of this utility model.

[0027] Obviously, the accompanying drawings described below are merely some examples or embodiments of this utility model. Those skilled in the art can apply this utility model to other similar scenarios without any creative effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this utility model, any changes to the design, manufacturing, or production methods based on the disclosed technical content are merely conventional technical means and should not be construed as insufficient disclosure of this utility model.

[0028] In this utility model, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this utility model. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this utility model may be combined with other embodiments without conflict.

[0029] like Figure 1-6 As shown, a flap-type gas distribution valve includes a valve body 7 and two pilot gas passages 77 located on the same end face of the valve body 7. Each pilot gas passage 77 includes a first pilot gas port and a second pilot gas port, as well as a drive assembly for controlling the opening or closing of the first pilot gas port and the second pilot gas port. The drive assembly includes: The piston chamber 1 is arranged laterally on the valve body 7 and has a first opening 11 and a second opening 12 corresponding to the first pilot air port and the second pilot air port. A piston rod 2 slides within the piston chamber 1 and is provided with a first sealing piston 21 and a second sealing piston 22. The movement of the first sealing piston 21 and the second sealing piston 22 controls the opening and closing of the first opening 11 and the second opening 12 within the piston chamber 1. To ensure that the opening and closing of the first opening 11 and the second opening 12 can be controlled during the movement of the piston rod 2, the distance between the first sealing piston 21 and the second sealing piston 22 is greater than the distance between the first opening 11 and the second opening 12. A spring 3 is provided between the inner end of the piston rod 2 and the piston chamber 1 to push the piston rod 2 to move away from the spring 3. The outer end of the piston rod 2 penetrates the piston chamber 1 and extends to its outside. Pressure relief holes are provided on the piston chambers on both sides of the first sealing piston and the second sealing piston. Specifically, a pressure relief hole 13 is provided on the piston chamber 1 at the inner end of the piston rod 2 to balance the gas pressure on the side of the piston chamber 1 near the spring 3. On the other side, a gap is provided at the position where the outer end of the piston rod penetrates the piston chamber to form the pressure relief hole.

[0030] Also includes: The rotating shaft 4 is perpendicularly intersecting between the outer ends of the two piston rods 2; The pressure block 5 is disposed on the rotating shaft 4 and extends along the radial direction of the rotating shaft 4; The drive motor 6 is connected to the rotating shaft 4.

[0031] By setting a drive motor 6, the drive motor 6 drives the rotating shaft 4 to rotate, and the rotating shaft 4 drives the pressure block 5 to rotate synchronously. The rotation of the pressure block 5 pushes the piston rod 2, and the movement of the piston rod 2 controls the opening and closing of the first opening 11 and the second opening 12 in the piston chamber 1, thereby realizing the opening and closing of the first pilot air port and the second pilot air port. This results in better stability and can extend the service life of the gas distribution valve. Controlling by the drive motor 6 is more energy-efficient than controlling by the solenoid valve. The drive motor 6 is only energized for a moment during operation, resulting in less power consumption and lower energy consumption. Furthermore, in the prior art, there are two solenoid valves, which occupy a large space. In this application, the motor drive results in a more compact structure and smaller size, which is conducive to the miniaturization of the oxygen generator.

[0032] In some specific embodiments, when the pressure block 5 rotates under the drive of the drive motor 6 to abut against the piston rod 2 and pushes the piston rod 2 to move closer to the spring 3, so that the second sealing piston 22 is located between the first opening 11 and the second opening 12, the first opening 11 and the second opening 12 are disconnected, and the first pilot air port is disconnected from the second pilot air port. The gas pressure of the first sealing piston 21 and the piston chamber 1 near the end of the spring 3 is released from the pressure relief hole 13 to prevent the piston rod 2 from causing a vacuum when it moves to the outward end. In addition, since the gas in the pilot air passage 77 cannot enter the pilot chamber 744, the gas pressure at the top of the valve rod 8 decreases. The gas that enters the valve body 7 from the pilot air passage 77 enters the piston chamber 1 through the second pilot air port and the second opening 12 and exits from the piston rod 8. The leakage occurs at the connection between the piston rod 2 and the piston chamber 1. Because the pressure at the top of the valve rod 8 is less than the pressure at the bottom of the valve rod 8, the valve rod 8 moves upward. When the pressure block 5 moves away from the piston rod 2 under the drive of the drive motor 6, the piston rod 2 moves away from the spring 3 under the elastic force of the spring 3 until the first sealing piston 21 and the second sealing piston 22 are located on both sides of the first opening 11 and the second opening 12, respectively. The first opening 11 and the second opening 12 are connected, and then the first pilot air port and the second pilot air port are connected. The gas in the pilot air passage 77 enters the valve body 7 through the first pilot air port, the first opening 11, the second opening 12, and the second pilot air port to the top of the valve rod 8. When the pressure at the top of the valve rod 8 is greater than the pressure at the bottom of the valve rod 8, it pushes the valve rod 8 downward.

[0033] In some embodiments, in order to increase the contact area when the pressure block 5 and the piston rod 2 abut together so that the pressure block 5 can push the piston rod 2 to move, a groove 51 is provided at the pressing point after the pressure block 5 abuts the outer end of the piston rod 2.

[0034] In some embodiments, to facilitate the assembly of the drive components and the deflection movement of the pressure block 5, the gas distribution valve further includes: The first support 71 and the second support 72 are located on the upper sides of the valve body 7; A pressure block deflection groove 17 is formed above the valve body 7 between the first support column 71 and the second support column 72; The motor mounting plate 73 is installed above the first support column 71 and the second support column 72 and is used to support the drive motor 6; The space for the deflection of the pressure block 5 is formed by the enclosure between the motor mounting plate 73, the first support column 71, the second support column 72 and the pressure block deflection groove 17.

[0035] In some embodiments, to facilitate the limiting and fixing of the two piston chambers 1, the gas distribution valve further includes: The piston chamber pressure plate 14 is integrally formed with the motor mounting plate 73, and the piston chamber pressure plate 14 is provided with ear plates 15 on both sides, and the ear plates 15 are pressed on the bolt holes on the inner end side of the piston chamber 1.

[0036] In some embodiments, in order to reduce the influence of other components on the deflection movement of the pressure block 5, the motor mounting plate 73 completely covers the range of motion of the pressure block 5 and / or a protective cover is provided outside the pressure block 5.

[0037] In some embodiments, in order to reduce wear caused by the contact movement between the pressure block 5 and the piston rod 2 and extend the service life of the gas distribution valve, a wear-resistant coating is provided at the groove 51.

[0038] In some embodiments, to make the gas distribution valve structure more compact, the two gas chambers are integrated into a single valve body 7. Therefore, the gas distribution valve further includes: Two gas chambers, each of the gas chambers corresponding to each of the pilot gas paths 77; The gas chamber includes: The first chamber 741, the second chamber 742, and the third chamber 743 are disposed in the valve body 7 and are connected from the inside of the valve body 7 to the outside of the valve body 7 along the same axial direction. They are respectively provided with a first air hole 761, a second air hole 762, and a third air hole 763 that are connected to the outside. The valve stem 8 has its middle part located in the second chamber 742, and is provided with a first sealing element 81 for forming an abutment seal with the air hole between the second chamber 742 and the third chamber 743, and a second sealing element 82 for forming an abutment seal with the air hole between the first chamber 741 and the second chamber 742, and the force-bearing end face of the first sealing element 81 and the force-bearing end face of the second sealing element 82 are not the same area; The first pilot air port is connected to the first air hole 761; the second pilot air port is connected to the force-bearing end face of the first sealing member 81.

[0039] Specifically, such as Figure 3-5As shown, the valve body 7 includes a first valve body 751, a second valve body 752, and a third valve body 753. A first chamber 741 is located within the first valve body 751 or between the first valve body 751 and the second valve body 752. The second chamber 742 and the third chamber 743 are both located within the second valve body 752. A pilot chamber 744 is provided within the third valve body 753. Gas enters the pilot chamber 744 through the pilot gas passage 77, applying a driving force to the valve stem 8 and the first seal 81. The first seal 81 is located between the second valve body 752 and the third valve body 753, forming an abutment seal with the vent between the second chamber 742 and the third chamber 743 to prevent… The gas in the third chamber 743 leaks into the pilot chamber 744 through the first seal 81, which is a fully sealed structure. The second seal 82 is located between the first valve body 751 and the second valve body 752, and forms an abutment seal with the air hole between the first chamber 741 and the second chamber 742. In order to facilitate the air passage connection between the first chamber 741 and the second chamber 742, the second seal 82 is a semi-sealed structure. Therefore, the areas of the force-bearing end face of the first seal 81 and the force-bearing end face of the second seal 82 are not the same, and the area of ​​the force-bearing end face of the first seal 81 is larger than the area of ​​the force-bearing end face of the second seal 82.

[0040] When the first pilot port is connected to the second pilot port, gas enters the pilot chamber 744 through the pilot gas passage 77, applying a downward driving force to the valve stem 8 and the first seal 81. This causes the first seal 81 to form an abutment seal with the vents between the second chamber 742 and the third chamber 743, connecting the first chamber 741 and the second chamber 742. Gas flows from the first vent 761 to the second vent 762. When the first pilot port is disconnected from the second pilot port, gas is applied to the first seal 8... The gas pressure at the force-bearing end face enters the piston chamber 1 through the pilot chamber 744 and is released through the penetration between the piston rod 2 and the piston chamber 1. The gas entering the first valve body 751 through the first vent 761 applies a driving force to the force-bearing end face of the valve rod 8 and the second sealing member 82, causing the second sealing member 82 to form an abutment seal with the vent between the first chamber 741 and the second chamber 742, thus connecting the second chamber 742 and the third chamber 743. Gas flows from the second vent 762 into the third vent 763. In some embodiments, to simplify the gas path structure, the two first vents 761 are connected, and the two third vents 763 are connected.

[0041] In some embodiments, in order to increase the sealing performance of the first seal 81 and the second seal 82 and reduce friction, both the first seal 81 and the second seal 82 are diaphragm structures.

[0042] In some embodiments, to facilitate the processing of the second seal 82, the diaphragm structure of the second seal 82 is provided with an opening 821 to allow gas to flow from the first chamber 741 into the second chamber 742.

[0043] In some embodiments, to facilitate the installation of the spring 3 and the reset of the piston rod 2, the gas distribution valve further includes a spring mounting groove 16, which is located at the inner end of the piston rod 2 and is used to install the spring 3, and the inner diameter of the spring mounting groove 16 is smaller than the inner diameter of the piston cavity 1 to form an annular step.

[0044] In some embodiments, to prevent the pressure relief hole 13 from being blocked, the pressure relief hole 13 on the outside of the first sealing piston 21 is located at the outer end of the spring mounting groove 16.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flap-type gas distribution valve, comprising a valve body and two pilot gas paths located on the same end face of the valve body, each pilot gas path comprising a first pilot gas port and a second pilot gas port, and a drive assembly for controlling the opening or closing of the first pilot gas port and the second pilot gas port, characterized in that, The driving component includes: The piston chamber is arranged laterally on the valve body and has a first opening and a second opening corresponding to the first pilot port and the second pilot port; A piston rod slides within the piston cavity and is provided with a first sealing piston and a second sealing piston, wherein the distance between the first sealing piston and the second sealing piston is greater than the distance between the first opening and the second opening; a spring is provided between the inner end of the piston rod and the piston cavity, and the outer end of the piston rod passes through the piston cavity and extends to its outside; pressure relief holes are provided on the piston cavity on both sides of the first sealing piston and the second sealing piston. Also includes: A rotating shaft is perpendicularly intersecting between the outer ends of the two piston rods; A pressure block is disposed on the rotating shaft and extends radially along the rotating shaft; A drive motor is connected to the rotating shaft.

2. The flap-type gas distribution valve according to claim 1, characterized in that, The compression point where the pressure block abuts against the outer end of the piston rod is provided with a groove, and the groove is provided with a wear-resistant coating.

3. The flap-type gas distribution valve according to claim 1, characterized in that, Also includes: The first and second pillars are located on the upper sides of the valve body; A pressure block deflection groove is formed above the valve body between the first support and the second support; A motor mounting plate is installed above the first and second pillars and is used to support the drive motor; The space for deflecting the pressure block is formed by the enclosure between the motor mounting plate, the first support, the second support, and the pressure block deflection groove.

4. The flap-type gas distribution valve according to claim 3, characterized in that, Also includes: The piston chamber pressure plate is integrally formed with the motor mounting plate, and the piston chamber pressure plate has ear plates on both sides, which are pressed onto the bolt holes on the inner end side of the corresponding piston chamber.

5. The flap-type gas distribution valve according to claim 3, characterized in that, The motor mounting plate completely covers the range of motion of the pressure block and / or a protective cover is provided outside the pressure block.

6. The flap-type gas distribution valve according to claim 1, characterized in that, The outer end of the piston rod is provided with a gap at the position where it penetrates the piston cavity to form the pressure relief hole.

7. The flap-type gas distribution valve according to claim 1, characterized in that, Also includes: Two gas chambers, each gas chamber corresponding to each pilot gas path; The gas chamber includes: The first chamber, the second chamber, and the third chamber are disposed in the valve body along the same axial direction from the valve body to the outside of the valve body, and are respectively provided with a first vent, a second vent, and a third vent that are connected to the outside. The valve stem has its middle part located in the second chamber and is provided with a first sealing element for forming an abutment seal with the air hole between the second chamber and the third chamber and a second sealing element for forming an abutment seal with the air hole between the first chamber and the second chamber, and the force-bearing end face of the first sealing element and the force-bearing end face of the second sealing element have different areas. The first pilot air port is connected to the first air hole; the second pilot air port is connected to the force-bearing end face of the first sealing element.

8. The flap-type gas distribution valve according to claim 7, characterized in that, Both the first and second sealing elements are diaphragm structures, and the diaphragm structure of the second sealing element has an opening.

9. The flap-type gas distribution valve according to claim 1, characterized in that, Also includes: A spring mounting groove is provided at the inner end of the piston rod and is used to mount the spring. The inner diameter of the spring mounting groove is smaller than the inner diameter of the piston cavity to form an annular step.

10. The flap-type gas distribution valve according to claim 9, characterized in that, The pressure relief hole on the outside of the first sealing piston is located at the outer end of the spring mounting groove.

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