Rotary valve for oxygen generator

Abstract

The utility model relates to oxygen generator rotary valve technical field discloses a kind of rotary valves for oxygen generator, including lower valve body and upper valve body, the upper valve body is arranged at the upper end of lower valve body, the inside wall of lower valve body is respectively provided with first installation groove and second installation groove with upper valve body inner wall upper part is lower part, first installation groove and second installation groove inside are equipped with static valve plate, the dynamic valve plate is rotatably connected in static valve plate upper end, the upper valve body upper end is equipped with driving component, the driving component includes support, the support upper end face is fixedly connected with mounting plate, the center of mounting plate upper end face is equipped with servo motor, the output end of servo motor penetrates mounting plate upper end face and leads to mounting plate lower end face, and end portion is fixedly connected with first turntable. In the utility model, by the setting of driving component, it does not need to be connected with dynamic valve plate by penetrating upper valve body, it does not need to be opened, reduce the risk of air leakage caused by long time use.

Description

Technical Field

[0001] This utility model relates to the field of rotary valve technology for oxygen generators, and in particular to a rotary valve for oxygen generators. Background Technology

[0002] An oxygen concentrator is a device that separates, purifies, and supplies oxygen from the air to medical, industrial, and other fields. Its main function is to provide high-concentration oxygen to meet the needs of different application scenarios. The rotary valve of the oxygen concentrator is the core control component of the pressure swing adsorption oxygen generation system. It is mainly used to control the flow direction and pressure of the gas to achieve efficient separation and purification of oxygen.

[0003] There are still some problems with the rotary valves used in existing oxygen concentrators. The current rotary valves are driven by a servo motor. The output end of the servo motor passes through the valve body and enters the valve body to drive the valve plate to rotate. Although the opening is sealed with a sealing ring, there is still a risk of air leakage at the opening after long-term use. Therefore, those skilled in the art have provided a rotary valve for oxygen concentrators to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rotary valve for oxygen generators. Through the design of the drive component, it eliminates the need for a connection between the upper valve body and the moving valve plate, and eliminates the need for an opening, thereby reducing the risk of air leakage due to prolonged use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rotary valve for an oxygen generator, comprising a lower valve body and an upper valve body, wherein the upper valve body is disposed at the upper end of the lower valve body, and a first mounting groove and a second mounting groove are respectively provided on the upper part of the inner side wall of the lower valve body and on the lower part of the inner wall of the upper valve body, wherein a stationary valve plate is provided inside the first mounting groove and the second mounting groove, and a moving valve plate is rotatably connected to the upper end of the stationary valve plate, and a driving component is provided at the upper end of the upper valve body;

[0006] The driving component includes a bracket, with a mounting plate fixedly connected to the upper end face of the bracket. A servo motor is provided at the center of the upper end face of the mounting plate. The output end of the servo motor passes through the upper end face of the mounting plate and extends to the lower end face of the mounting plate. A first turntable is fixedly connected to the end of the first turntable. Six first permanent magnets are fixedly connected in a circular arrangement on the lower end face of the first turntable. A second turntable is rotatably connected to the upper inner wall of the valve body located at the lower end of the first turntable. Second magnets are fixedly connected to the upper end face of the second turntable located at the lower end of the six first permanent magnets. A connecting shaft is fixedly connected at the center of the lower end face of the second turntable. The lower end of the connecting shaft is fixedly connected to the upper end face of the moving valve plate.

[0007] The above technical solution involves starting a servo motor, which drives the first turntable to rotate. The first turntable then drives six first permanent magnets to rotate. The six second magnets inside the upper valve body rotate along with the six first permanent magnets, thereby driving the second turntable to rotate. The second turntable drives the connecting shaft to rotate, which in turn drives the moving valve plate to rotate, allowing one of the flow holes to leak out for air circulation and selecting the connected molecular sieve tower. During this process, the output end of the servo motor does not need to penetrate the upper valve body, and there are no sealed components, so there is no risk of air leakage during long-term use.

[0008] Furthermore, each of the four mounting holes at the end of the servo motor is provided with a screw. Taking one of the screws as an example, the screw passes through the mounting hole, the upper surface of the mounting plate, and the upper surface of the bracket in sequence to the lower end of the bracket, and the end is threadedly connected to the upper surface of the upper valve body.

[0009] The above technical solution uses four screws to fix the mounting plate and the bracket.

[0010] Furthermore, the static valve plate includes a plate body, and flow holes are provided at both sides of the center of the upper end face of the plate body. Third mounting grooves are provided at the edges of both the upper and lower end faces of the plate body, and rubber pads are provided inside the two third mounting grooves.

[0011] With the above technical solution, during installation, two rubber pads are placed inside the two third mounting grooves, and then the two rubber pads and the plate are placed inside the first mounting groove. The upper valve body is placed on the upper end of the lower valve body, and the second mounting groove on the lower end face of the upper valve body is placed on the outside of the upper rubber pad, so that the two rubber pads are pressed at the same time, and the sealing performance is increased after increasing the pre-tightening force.

[0012] Furthermore, an air inlet pipe is fixedly connected to the center of the front end face of the upper valve body, a partition is fixedly connected to the center of the interior of the lower valve body, and an air outlet pipe is fixedly connected to the front end face of the lower valve body on both sides of the partition.

[0013] The above technical solution uses a partition to separate the air entering through the two flow holes.

[0014] Furthermore, a first connecting plate is fixedly sleeved on the upper part of the outer side wall of the lower valve body, and a second connecting plate is fixedly sleeved on the lower part of the outer side wall of the upper valve body. Bolt assemblies are provided at the four opposite corners of the upper surface of the second connecting plate, and the first connecting plate and the second connecting plate are fixedly connected by four bolt assemblies.

[0015] The above technical solution involves using bolts in the bolt assembly that pass through the first connecting plate and the second connecting plate, and then fixing them with nuts. This causes both rubber pads to be compressed simultaneously, increasing the preload and improving the sealing performance.

[0016] Furthermore, the second turntable is rotatably connected to the upper valve body and to the stationary valve plate and the moving valve plate via bearings;

[0017] The above technical solution provides rotational support force and improves stability during rotation.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, the servo motor is started, which drives the first turntable to rotate. The first turntable drives the six first permanent magnets to rotate. The six second magnets inside the upper valve body rotate with the six first permanent magnets, thereby driving the second turntable to rotate. The second turntable drives the connecting shaft to rotate, thereby driving the moving valve plate to rotate, allowing one of the flow holes to leak out for air circulation and selecting the connected molecular sieve tower. During this process, the output end of the servo motor does not need to penetrate the upper valve body. There are no sealed components, so there is no risk of air leakage during long-term use.

[0020] 2. In this utility model, two rubber pads are fitted inside two third mounting grooves, and then the two rubber pads and the plate are placed inside the first mounting groove. The upper valve body is placed on the upper end of the lower valve body, and the second mounting groove on the lower end face of the upper valve body is fitted on the outer side of the upper rubber pad. Then, the bolts in the bolt assembly pass through the first connecting plate and the second connecting plate, and are fixed by nuts, so that the two rubber pads are pressed at the same time. After increasing the pre-tightening force, the sealing performance is increased. Attached Figure Description

[0021] Figure 1 This is a perspective view of a rotary valve for an oxygen generator according to the present invention.

[0022] Figure 2 This is a three-dimensional exploded view of a rotary valve for an oxygen concentrator proposed in this utility model;

[0023] Figure 3 This is a three-dimensional exploded view of a rotary valve for an oxygen concentrator proposed in this utility model;

[0024] Figure 4 This is a three-dimensional exploded view from another perspective of the rotary valve for an oxygen generator proposed in this utility model.

[0025] Legend:

[0026] 1. Lower valve body; 2. Upper valve body; 3. Drive component; 4. Inlet pipe; 5. Outlet pipe; 6. First connecting plate; 7. Second connecting plate; 8. Bolt assembly; 9. Stationary valve plate; 10. Moving valve plate; 11. Partition plate; 12. First mounting slot; 13. Second mounting slot;

[0027] 301. Bracket; 302. Mounting plate; 303. Servo motor; 304. Screw; 305. First permanent magnet; 306. First turntable; 307. Second turntable; 308. Second magnet; 309. Connecting shaft;

[0028] 901, Plate; 902, Flow hole; 903, Third mounting groove; 904, Rubber pad. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figure 1-4 An embodiment of this utility model provides a rotary valve for an oxygen generator, comprising a lower valve body 1 and an upper valve body 2. The upper valve body 2 is disposed at the upper end of the lower valve body 1. A first mounting groove 12 and a second mounting groove 13 are respectively provided on the upper part of the inner wall of the lower valve body 1 and the lower part of the inner wall of the upper valve body 2. A stationary valve plate 9 is provided inside the first mounting groove 12 and the second mounting groove 13. A moving valve plate 10 is rotatably connected to the upper end of the stationary valve plate 9. A driving component 3 is provided at the upper end of the upper valve body 2.

[0031] like Figure 1 , 2As shown in Figures 3 and 4, the drive component 3 includes a bracket 301. A mounting plate 302 is fixedly connected to the upper end face of the bracket 301. A servo motor 303 is located at the center of the upper end face of the mounting plate 302. The output end of the servo motor 303 passes through the upper end face of the mounting plate 302 and extends to the lower end face of the mounting plate 302. A first turntable 306 is fixedly connected to the end of the servo motor 303. Six first permanent magnets 305 are fixedly connected in a circular arrangement on the lower end face of the first turntable 306. A second turntable 307 is rotatably connected to the upper inner wall of the valve body 2 located at the lower end of the first turntable 306. Second magnets 308 are fixedly connected to the upper end face of the second turntable 307 located at the lower end of the six first permanent magnets 305. A connecting shaft is fixedly connected to the center of the lower end face of the second turntable 307. 309, the lower end of the connecting shaft 309 is fixedly connected to the upper surface of the moving valve plate 10. When the servo motor 303 is started, the servo motor 303 drives the first turntable 306 to rotate. The first turntable 306 drives the six first permanent magnets 305 to rotate. The six second magnets 308 inside the upper valve body 2 rotate with the six first permanent magnets 305, thereby driving the second turntable 307 to rotate. The second turntable 307 drives the connecting shaft 309 to rotate, thereby driving the moving valve plate 10 to rotate, allowing one of the flow holes 902 to leak out for air circulation and select the connected molecular sieve tower. During this process, the output end of the servo motor 303 does not need to penetrate the upper valve body 2. There are no sealed components, so there is no risk of air leakage during long-term use.

[0032] The upper end of each of the four mounting holes at the end of the servo motor 303 is provided with a screw 304. Taking one of the screws 304 as an example, the screw 304 passes through the mounting hole, the upper end face of the mounting plate 302 and the upper end face of the bracket 301 in sequence to the lower end of the bracket 301, and the end is threadedly connected to the upper end face of the upper valve body 2. The mounting plate 302 and the bracket 301 are fixed by the four screws 304.

[0033] like Figure 2 , 3 As shown in Figure 4, the static valve plate 9 includes a plate body 901. Flow holes 902 are provided on both sides of the center of the upper end face of the plate body 901. Third mounting grooves 903 are provided on the upper and lower end faces of the plate body 901 near the edges. Rubber pads 904 are provided inside the two third mounting grooves 903. During installation, the two rubber pads 904 are fitted inside the two third mounting grooves 903, and then the two rubber pads 904 and the plate body 901 are placed inside the first mounting groove 12. The upper valve body 2 is placed on the upper end of the lower valve body 1. The second mounting groove 13 on the lower end face of the upper valve body 2 is fitted on the outside of the upper rubber pad 904, so that the two rubber pads 904 are simultaneously compressed, increasing the pre-tightening force and improving the sealing performance.

[0034] An air inlet pipe 4 is fixedly connected to the center of the front end face of the upper valve body 2, and a partition 11 is fixedly connected to the center of the interior of the lower valve body 1. An air outlet pipe 5 is fixedly connected to the front end face of the lower valve body 1 on both sides of the partition 11. The air entering through the two flow holes 902 is separated by the partition 11.

[0035] A first connecting plate 6 is fixedly sleeved on the upper part of the outer side wall of the lower valve body 1, and a second connecting plate 7 is fixedly sleeved on the lower part of the outer side wall of the upper valve body 2. Bolt assemblies 8 are provided at the four opposite corners of the upper end face of the second connecting plate 7. The first connecting plate 6 and the second connecting plate 7 are fixedly connected by four bolt assemblies 8. The bolts in the bolt assemblies 8 pass through the first connecting plate 6 and the second connecting plate 7 and are fixed by nuts, so that the two rubber pads 904 are simultaneously compressed. After increasing the pre-tightening force, the sealing performance is improved.

[0036] The second turntable 307 is rotatably connected to the upper valve body 2 and to the stationary valve plate 9 and the moving valve plate 10 via bearings, providing rotational support force and improving stability during rotation.

[0037] Working principle: During installation, two rubber pads 904 are fitted inside the two third mounting grooves 903. Then, the two rubber pads 904 and the plate 901 are placed inside the first mounting groove 12. The upper valve body 2 is placed on the upper end of the lower valve body 1. The second mounting groove 13 on the lower end face of the upper valve body 2 is fitted on the outside of the upper rubber pad 904. Then, the bolts in the bolt assembly 8 pass through the first connecting plate 6 and the second connecting plate 7 and are fixed with nuts. This causes the two rubber pads 904 to be compressed simultaneously, increasing the preload and thus improving the sealing performance.

[0038] In use, air enters through the air inlet pipe 4, and the servo motor 303 is started. The servo motor 303 drives the first turntable 306 to rotate, which in turn drives the six first permanent magnets 305 to rotate. The six second magnets 308 inside the upper valve body 2 rotate along with the six first permanent magnets 305, thereby driving the second turntable 307 to rotate. The second turntable 307 drives the connecting shaft 309 to rotate, which in turn drives the moving valve plate 10 to rotate, allowing air to circulate through one of the flow holes 902 and select the connected molecular sieve tower. During this process, the output end of the servo motor 303 does not need to penetrate the upper valve body 2. There are no sealed components, so there is no risk of air leakage during long-term use.

[0039] When it is necessary to adjust the airflow to another molecular sieve tower, the servo motor 303 is restarted for adjustment. The rotary valve for oxygen generators achieves low noise, high reliability and long service life through innovative designs such as dynamic and static sealing surface matching, multi-channel air path distribution and dynamic compensation sealing. It is a commonly used technical solution among existing rotary valves for oxygen generators, and will not be elaborated on here.

[0040] The equipment also includes a control system. The control panel in the control system enables the equipment to be started and controlled through a human-machine interface and an electrical control system. Input signal processing converts the operator's instructions into electrical signals, and output signal transmission transmits the control signals to each actuator to realize equipment control. This is a commonly used technical means in existing control systems, and will not be elaborated on here.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rotary valve for an oxygen concentrator, comprising a lower valve body (1) and an upper valve body (2), wherein the upper valve body (2) is disposed at the upper end of the lower valve body (1), characterized in that: The lower valve body (1) has a first mounting groove (12) at the upper part of its inner side wall and the upper valve body (2) has a second mounting groove (13) at the lower part of its inner side wall. The first mounting groove (12) and the second mounting groove (13) are provided with a stationary valve plate (9). The upper end of the stationary valve plate (9) is rotatably connected to a moving valve plate (10). The upper end of the upper valve body (2) is provided with a driving component (3). The driving component (3) includes a bracket (301), and a mounting plate (302) is fixedly connected to the upper end face of the bracket (301). A servo motor (303) is provided at the center of the upper end face of the mounting plate (302). The output end of the servo motor (303) passes through the upper end face of the mounting plate (302) and extends to the lower end face of the mounting plate (302). A first turntable (306) is fixedly connected to the end of the first turntable (306). Six first turntables are fixedly connected in a circular arrangement on the lower end face of the first turntable (306). A permanent magnet (305) is located on the upper inner wall of the valve body (2) at the lower end of the first turntable (306), and a second turntable (307) is rotatably connected thereto. A second magnet (308) is fixedly connected to the upper surface of the six second turntables (307) at the lower end of the first permanent magnet (305). A connecting shaft (309) is fixedly connected at the center of the lower surface of the second turntable (307), and the lower end of the connecting shaft (309) is fixedly connected to the upper surface of the moving valve plate (10).

2. The rotary valve for an oxygen concentrator according to claim 1, characterized in that: The upper end of each of the four mounting holes at the end of the servo motor (303) is provided with a screw (304). Taking one of the screws (304) as an example, the screw (304) passes through the mounting hole, the upper end face of the mounting plate (302) and the upper end face of the bracket (301) in sequence to the lower end of the bracket (301), and the end is threadedly connected to the upper end face of the upper valve body (2).

3. A rotary valve for an oxygen concentrator according to claim 1, characterized in that: The static valve plate (9) includes a plate body (901). A flow hole (902) is provided on both sides of the center of the upper end face of the plate body (901). A third mounting groove (903) is provided on both the upper and lower end faces of the plate body (901) near the edge. A rubber pad (904) is provided inside the two third mounting grooves (903).

4. A rotary valve for an oxygen concentrator according to claim 1, characterized in that: An air inlet pipe (4) is fixedly connected to the center of the front end face of the upper valve body (2), and a partition plate (11) is fixedly connected to the center of the interior of the lower valve body (1). An air outlet pipe (5) is fixedly connected to the front end face of the lower valve body (1) on both sides of the partition plate (11).

5. A rotary valve for an oxygen concentrator according to claim 1, characterized in that: The lower valve body (1) has a first connecting plate (6) fixedly sleeved on the upper side of its outer side wall, and the upper valve body (2) has a second connecting plate (7) fixedly sleeved on the lower side of its outer side wall. The second connecting plate (7) has bolt assemblies (8) at four opposite corners on its upper end face. The first connecting plate (6) and the second connecting plate (7) are fixedly connected by four bolt assemblies (8).

6. A rotary valve for an oxygen concentrator according to claim 1, characterized in that: The second turntable (307) is rotatably connected to the upper valve body (2) and to the stationary valve plate (9) and the moving valve plate (10) via bearings.

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