Switching valve of oxygen generator

Abstract

The switching valve comprises a valve body, a first air outlet and a second air outlet are formed in the two ends of the valve body respectively, a front sealing plate and a rear sealing plate are installed on the front side and the rear side of the valve body respectively, an air inlet is formed in the center of the front sealing plate, and a top cover is installed at the top of the valve body. The bottom of the top cover is fixedly connected with a sealing block, a sliding groove is formed in the surface of the top cover, the two sides of the top of the top cover are fixedly connected with fixing plates, one side of each fixing plate is fixedly connected with a pair of magnets, and a switching assembly is arranged on the top cover. The valve body is arranged in the valve body, so that the interior of the valve body and related parts can be cleaned or replaced after long-time use, airflow can be manually controlled to be switched among different molecular sieve towers, and continuous operation of the oxygen generator can be prevented from being influenced by delayed or frequent failure of airflow switching when an electromagnetic driving device or a pneumatic driving device breaks down.

Description

Technical Field

[0001] The utility model belongs to the technical field of switching valves, and particularly relates to a switching valve for an oxygen generator. Background Technique

[0002] An oxygen generator is a device that can extract oxygen from the air and provide high-concentration oxygen. It is usually used for patients who need additional oxygen support, such as patients with respiratory diseases or people working in low-oxygen environments. The switching valve in the oxygen generator is a key component used to control the switching of air flow between different molecular sieve towers during the oxygen generation process.

[0003] Currently, there are many types of switching valves on the market. For example, a multi-functional gas switching valve for an oxygen generator is disclosed on the Chinese Patent Network, with the publication number CN204437370U. This switching valve has a novel and unique structure, making the gas switching valve have low noise, the structural components are easy to install, the structure is compact and not easy to leak air, reducing noise, and can provide a relatively quiet use environment. It can be used alone for the gas function of the oxygen generator or comprehensively for the gas function of the oxygen generator, with high functionality. However, there are some defects and deficiencies to be improved: (1) Most of the existing switching valves are of an integrated structure, with a relatively complex design, and the related components are difficult to disassemble at will. After long-term use, it is not convenient to clean or replace the inside of the valve body and related components; (2) Due to the structural design of some existing switching valves, it is necessary to control the movement of the valve core by electromagnetic drive or pneumatic drive. Although this drive method is relatively accurate, when the electromagnetic drive device or pneumatic drive device fails, it will cause a delay in air flow switching or frequent failures, thus affecting the continuous operation of the oxygen generator. Therefore, in view of the above problems, it is of great significance to provide a switching valve for an oxygen generator according to the present utility model. Summary of the Utility Model

[0004] The utility model provides a switching valve for an oxygen generator, which adopts a modular design. After long-term use, the front sealing plate, rear sealing plate, top cover and switching component can be removed from the valve body together, so as to clean or replace the inside of the valve body and related components; the valve core can be manually moved through the switching component, so as to control the switching of air flow between different molecular sieve towers during the oxygen generation process of the oxygen generator, thereby realizing continuous oxygen separation and supply. Compared with the electromagnetic drive or pneumatic drive method, it can effectively prevent the air flow switching from being delayed or frequently failing due to the failure of the electromagnetic drive device or pneumatic drive device, thus affecting the continuous operation of the oxygen generator. In summary, the problems in the background technique are solved.

[0005] To solve the above technical problems, the present utility model is realized through the following technical solutions:

[0006] An oxygen generator switching valve of the present utility model includes a valve body. First air outlets and second air outlets are respectively opened at both ends of the valve body. A plurality of mounting seats are fixedly connected to the outer walls of the bottom ends on both sides of the valve body. Mounting holes are opened on the surfaces of each mounting seat. A front sealing plate and a rear sealing plate are respectively installed on the front side and the rear side of the valve body. An air inlet is opened at the center of the front sealing plate. The two sides of the top end of the valve body are L-shaped, and a plurality of positioning holes are opened. A top cover is installed on the top of the valve body. A sealing block is fixedly connected to the bottom of the top cover. A chute is opened on the surface of the top cover. The bottom of the chute penetrates through the sealing block. Fixing plates are fixedly connected to both sides of the top of the top cover. A pair of magnets are fixedly connected to one side of each fixing plate. A switching component is arranged on the top cover;

[0007] The switching component includes a switching block. A pair of metal blocks are fixedly connected to both sides of the switching block. A slider is fixedly connected to the bottom of the switching block. The slider passes through the chute and is fixedly connected to a valve core.

[0008] Further, the shapes of the front sealing plate and the rear sealing plate are the same as that of the valve body, and their sizes correspond equally. A plurality of threaded holes are opened on the surfaces of the front sealing plate and the rear sealing plate. A bolt matching with each threaded hole is threadedly connected in each threaded hole. A plurality of threaded grooves matching with the bolts are opened on the front end face and the rear end face of the valve body. The number of the threaded grooves is the same as that of the threaded holes, and their diameters are equal. The center of each threaded groove corresponds to the center of each threaded hole one by one.

[0009] Further, the top cover is rectangular, and its length and width correspond equally to the length and width of the opening at the top of the valve body. A plurality of stud bolts are fixedly connected to both sides of the bottom of the top cover. The number of the stud bolts is the same as that of the positioning holes, and their diameters are equal. The center of each stud bolt corresponds to the center of each positioning hole one by one. A nut matching with each stud bolt is threadedly connected to each stud bolt.

[0010] Further, the cross section of the sealing block is rectangular, and its length and width respectively correspond equally to the length and width of the inner wall of the valve body. A sealing ring is arranged on the side wall surface of the sealing block.

[0011] Further, the valve core is rectangular. The top and the bottom of the valve core are respectively attached to the bottom of the sealing block and the bottom of the inner cavity of the valve body. The length of the valve core is greater than the diameter of the air inlet. The width of the valve core is equal to the width of the valve body. A plurality of buffer pads are fixedly connected to the side wall at the top ends on both sides of the valve core. The buffer pads are linearly distributed at equal intervals along the width direction of the valve core.

[0012] Further, the cross sections of the metal blocks and the magnets are circular, and their diameters are equal. The center of each metal block corresponds to the center of each magnet one by one.

[0013] Further, guide rods are fixedly connected to both sides of the switching block. Guide holes are formed on the surface of the fixing plate. The rod diameter of the guide rods is equal to the hole diameter of the guide holes, and each of the guide rods passes through the corresponding guide hole.

[0014] The utility model has the following beneficial effects compared with the prior art:

[0015] (1) When in use, the oxygen generator switching valve in the utility model adopts a modular design. After long-term use, the front sealing plate, rear sealing plate, top cover and switching assembly can be removed from the valve body together, so as to clean or replace the interior of the valve body and related components;

[0016] (2) When in use, the oxygen generator switching valve in the utility model can manually move the valve core through the switching assembly, so as to control the switching of air flow between different molecular sieve towers during the oxygen generation process of the oxygen generator, thereby realizing continuous oxygen separation and supply. Compared with the electromagnetic drive or pneumatic drive mode, it can effectively prevent the air flow switching from being delayed or frequently failing when the electromagnetic drive device or pneumatic drive device fails, which affects the continuous operation of the oxygen generator.

[0017] Of course, it is not necessary for any product implementing the utility model to achieve all the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of the external structure of an oxygen generator switching valve of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of an oxygen generator switching valve of the utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the valve body in the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the top cover in the utility model;

[0023] Figure 5 It is a bottom view of the top cover in the utility model;

[0024] Figure 6 It is a schematic diagram of the structure of the switching assembly in the utility model.

[0025] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0026] 1. Valve body; 2. First air outlet; 3. Second air outlet; 4. Mounting seat; 5. Mounting hole; 6. Front sealing plate; 7. Rear sealing plate; 8. Air inlet; 9. Positioning hole; 10. Top cover; 11. Sealing block; 12. Slide groove; 13. Guide hole; 14. Fixed plate; 15. Magnet; 16. Switching block; 17. Metal block; 18. Slide block; 19. Valve core; 20. Threaded hole; 21. Bolt; 22. Threaded groove; 23. Stud; 24. Nut; 25. Sealing ring; 26. Buffer pad; 27. Guide rod. Detailed implementation manners

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "relative", "one end", "inner", "lateral", "end", "both ends", "both sides", "front", "one end face", "the other end face", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0029] Please refer to Figures 1-6 As shown, a switching valve of an oxygen generator of the present invention includes a valve body 1. The two ends of the valve body 1 are respectively provided with a first air outlet 2 and a second air outlet 3. The first air outlet 2 and the second air outlet 3 can be externally connected to different oxygen generator molecular sieve towers through air pipes. A plurality of mounting seats 4 are fixedly connected to the outer walls of the two bottom ends of the valve body 1. Each mounting seat 4 is provided with a mounting hole 5 on its surface, and fasteners such as screws can be inserted into the mounting hole 5 to install the switching valve on the oxygen generator. A front sealing plate 6 and a rear sealing plate 7 are respectively installed on the front side and the rear side of the valve body 1. An air inlet 8 is provided at the center of the front sealing plate 6. The two top ends of the valve body 1 are in an L shape and are provided with a plurality of positioning holes 9. A top cover 10 is installed on the top of the valve body 1. A sealing block 11 is fixedly connected to the bottom of the top cover 10, and a slide groove 12 is provided on the surface of the top cover 10. The bottom of the slide groove 12 penetrates through the sealing block 11. A pair of fixed plates 14 are fixedly connected to both sides of the top of the top cover 10. A pair of magnets 15 are fixedly connected to one side of the fixed plate 14. A switching assembly is provided on the top cover 10;

[0030] The switching component includes a switching block 16. A pair of metal blocks 17 are fixedly connected to both sides of the switching block 16, and a slider 18 is fixedly connected to the bottom of the switching block 16. The slider 18 passes through the sliding groove 12 and is fixedly connected to a valve core 19. When the valve core 19 is in the initial position, it can block the air inlet 8. By manually sliding the switching block 16, it can drive the slider 18 together with the valve core 19 to move left and right along the sliding groove 12. When the valve core 19 moves to the leftmost side, the air flow can enter the valve body 1 through the air inlet 8 and enter one of the molecular sieve towers through the second air outlet 3 on the right side of the valve body 1. When the valve core 19 moves to the rightmost side, the air flow can enter the other molecular sieve tower through the first air outlet 2 on the left side of the valve body 1. Thus, during the oxygen generation process of the oxygen generator, the air flow can be controlled to switch between different molecular sieve towers to achieve continuous oxygen separation and supply. Compared with the electromagnetic drive or pneumatic drive methods, it can effectively prevent the air flow from being delayed or frequently failing to switch when the electromagnetic drive device or pneumatic drive device fails, which may affect the continuous operation of the oxygen generator.

[0031] Among them, the shapes of the front sealing plate 6 and the rear sealing plate 7 are the same as that of the valve body 1, and their sizes correspond equally. A number of threaded holes 20 are provided on the surfaces of the front sealing plate 6 and the rear sealing plate 7. A bolt 21 that matches it is threadedly connected to each threaded hole 20. A number of threaded grooves 22 that match the bolts 21 are provided on the front end face and the rear end face of the valve body 1. The number of the threaded grooves 22 is the same as that of the threaded holes 20, and their diameters are equal. The center of each threaded groove 22 corresponds to the center of each threaded hole 20 one by one. The end of the bolt 21 can be screwed into the corresponding threaded groove 22. Through the mutual cooperation between the bolt 21 and the threaded groove 22, the front sealing plate 6 and the rear sealing plate 7 can be fixedly installed on the front side and the rear side of the valve body 1 together, and the front sealing plate 6 and the rear sealing plate 7 are tightly attached to the front end face and the rear end face of the valve body 1 to seal the valve body 1. By unscrewing the bolts 21, the front sealing plate 6 and the rear sealing plate 7 can be removed from the valve body 1 to clean the inside of the front sealing plate 6, the rear sealing plate 7 and the valve body 1 after long-term use.

[0032] Among them, the top cover 10 is rectangular, and its length and width are correspondingly equal to the length and width of the top opening of the valve body 1. Moreover, a number of studs 23 are fixedly connected to both sides of the bottom of the top cover 10. The number of studs 23 is the same as that of the positioning holes 9, and the diameters are equal. And the center of each stud 23 corresponds to the center of each positioning hole 9 one by one. A nut 24 that matches it is threadedly connected to each stud 23. When the top cover 10 is placed on the top of the valve body 1, each stud 23 can be aligned with and pass through the corresponding positioning hole 9. At this time, thread the nut 24 onto each stud 23 and tighten it. The top cover 10 together with the switching component can be fixedly installed on the top of the valve body 1 through the mutual cooperation among the stud 23, the positioning hole 9, and the nut 24. By unscrewing the nut 24, the top cover 10 can be removed from the top of the valve body 1, so as to clean or replace the relevant components in the top cover 10 and the switching component after long-term use.

[0033] Among them, the cross-section of the sealing block 11 is rectangular, and its length and width are correspondingly equal to the inner wall length and width of the valve body 1 respectively. And a sealing ring 25 is provided on the side wall surface of the sealing block 11. The sealing ring 25 is made of elastic materials such as rubber and is fixed by means such as glue. When the top cover 10 is fixedly installed on the top of the valve body 1, the sealing block 11 can closely fit on the inner walls of the valve body 1, the front sealing plate 6, and the rear sealing plate 7. At this time, the sealing ring 25 can effectively fill the gaps between the sealing block 11 and the valve body 1, the front sealing plate 6, and the rear sealing plate 7 to play a sealing role, thereby preventing gas from leaking through the gaps.

[0034] Among them, the valve core 19 is rectangular. Its top and bottom respectively fit on the bottom of the sealing block 11 and the bottom of the inner cavity of the valve body 1. The length of the valve core 19 is greater than the diameter of the air inlet 8, and the width of the valve core 19 is equal to the width of the valve body 1. When the top cover 10 together with the switching component is fixedly installed on the top of the valve body 1, the valve core 19 can fit on the inner walls of the front sealing plate 6 and the rear sealing plate 7. A number of buffer pads 26 are fixedly connected to both side top walls of the valve core 19. The buffer pads 26 are linearly distributed at equal intervals along the width direction of the valve core 19. The buffer pads 26 are made of elastic materials such as sponge and are fixed by means such as glue. When the valve core 19 moves to the leftmost or rightmost side of the valve body 1, the buffer pads 26 can play a role in buffering and anti-wearing to avoid direct contact between the valve core 19 and the inner wall of the valve body 1, resulting in collision and wear.

[0035] Among them, the cross-sections of the metal block 17 and the magnet 15 are both circular, with equal diameters, and the centers of the respective metal blocks 17 and the centers of the respective magnets 15 correspond one by one. When the valve core 19 moves to the leftmost or rightmost side of the valve body 1, the metal block 17 can contact the corresponding magnet 15. At this time, the magnetic force generated by the magnet 15 can firmly adsorb the metal block 17 to fix the switching block 16, thereby fixing the position of the switched valve core 19 to prevent the valve core 19 from shifting or loosening.

[0036] Among them, guide rods 27 are fixedly connected to both sides of the switching block 16. Guide holes 13 are formed on the surface of the fixing plate 14. The rod diameters of the guide rods 27 are equal to the hole diameters of the guide holes 13, and each guide rod 27 passes through the corresponding guide hole 13. When the switching block 16 moves left and right, it can drive the guide rods 27 to move along the guide holes 13. At this time, the mutual cooperation between the guide rods 27 and the guide holes 13 can play a role in limiting to prevent the switching block 16 from shaking and bumping during the movement.

[0037] The circuits, electronic components, and chip modules involved in the present utility model are all prior arts, which can be fully realized by those skilled in the art without further elaboration. The content protected by the present utility model does not involve improvements to software and methods either.

[0038] The standard parts used in the application documents can be purchased from the market. All the components in this application document can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. The electrical components described in this article are all electrically connected to the external main controller and 220V mains power, and the main controller can be a conventional known device such as the LED lamp body to play a control role.

[0039] The working principle of the present utility model is:

[0040] When the present utility model is in use, the first air outlet 2 and the second air outlet 3 can be externally connected to different molecular sieve towers of an oxygen generator through air pipes. Air can be introduced into the valve body 1 through the air inlet 8. When the switching component is in the initial position, the valve core 19 can block the air inlet 8. By sliding the switching block 16, it can drive the slider 18 and the valve core 19 to move left and right along the chute 12. When the valve core 19 moves to the leftmost side, the air flow can enter the valve body 1 through the air inlet 8 and enter one of the molecular sieve towers through the second air outlet 3 on the right side of the valve body 1. When the valve core 19 moves to the rightmost side, the air flow can enter another molecular sieve tower through the first air outlet 2 on the left side of the valve body 1. Thus, during the oxygen generation process of the oxygen generator, the air flow can be controlled to switch between different molecular sieve towers to achieve continuous oxygen separation and supply. Compared with the electromagnetic drive or pneumatic drive methods, it can effectively prevent the air flow switching from being delayed or frequently failing when the electromagnetic drive device or pneumatic drive device fails, which affects the continuous operation of the oxygen generator. After the switching valve is used for a long time, the top cover 10 can be removed from the top of the valve body 1 by unscrewing the nut 24 to clean or replace the relevant components in the top cover 10 and the switching component. At the same time, the front sealing plate 6 and the rear sealing plate 7 can be removed from the valve body 1 by unscrewing the bolts 21 to clean the inside of the front sealing plate 6, the rear sealing plate 7 and the valve body 1.

[0041] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present utility model, so that those skilled in the art in the relevant technical field can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. An oxygen generator switching valve, characterized in that, It includes a valve body. First air outlets and second air outlets are respectively provided at both ends of the valve body. A plurality of mounting seats are fixedly connected to the outer walls at the bottom ends on both sides of the valve body. Mounting holes are provided on the surfaces of each mounting seat. A front sealing plate and a rear sealing plate are respectively installed on the front side and the rear side of the valve body. An air inlet is provided at the center of the front sealing plate. Both sides at the top of the valve body are L-shaped and are provided with a plurality of positioning holes. A top cover is installed on the top of the valve body. A sealing block is fixedly connected to the bottom of the top cover. A chute is provided on the surface of the top cover. The bottom of the chute penetrates through the sealing block. Fixing plates are fixedly connected to both sides at the top of the top cover. A pair of magnets are fixedly connected to one side of each fixing plate. A switching assembly is arranged on the top cover; The switching assembly includes a switching block. A pair of metal blocks are fixedly connected to both sides of the switching block. A slider is fixedly connected to the bottom of the switching block. The slider passes through the chute and is fixedly connected to a valve core.

2. The switching valve of an oxygen generator according to claim 1, characterized in that, The shapes of the front sealing plate and the rear sealing plate are the same as that of the valve body, and their sizes are correspondingly equal. A plurality of threaded holes are provided on the surfaces of the front sealing plate and the rear sealing plate. A bolt matching with each threaded hole is threadedly connected in each threaded hole. A plurality of threaded grooves matching with the bolts are provided on the front end face and the rear end face of the valve body. The number of the threaded grooves is the same as that of the threaded holes, and their diameters are equal. The centers of each threaded groove and the centers of each threaded hole correspond to each other one by one.

3. The switching valve of an oxygen generator according to claim 1, characterized in that, The top cover is rectangular, and its length and width correspond to the length and width of the opening at the top of the valve body. A plurality of stud bolts are fixedly connected to both sides at the bottom of the top cover. The number of the stud bolts is the same as that of the positioning holes, and their diameters are equal. The centers of each stud bolt and the centers of each positioning hole correspond to each other one by one. A nut matching with each stud bolt is threadedly connected to each stud bolt.

4. The switching valve of an oxygen generator according to claim 1, characterized in that, The cross section of the sealing block is rectangular, and its length and width respectively correspond to the inner wall length and width of the valve body. A sealing ring is arranged on the side wall surface of the sealing block.

5. The switching valve of an oxygen generator according to claim 1, wherein The valve core is rectangular. The top and the bottom of the valve core respectively fit against the bottom of the sealing block and the bottom of the inner cavity of the valve body. The length of the valve core is greater than the diameter of the air inlet. The width of the valve core is equal to the width of the valve body. A plurality of buffer pads are fixedly connected to the side wall at the top ends on both sides of the valve core. The buffer pads are linearly distributed at equal intervals along the width direction of the valve core.

6. The switching valve of an oxygen generator according to claim 1, characterized in that, The cross sections of the metal blocks and the magnets are circular, and their diameters are equal. The centers of each metal block and the centers of each magnet correspond to each other one by one.

7. The switching valve of an oxygen generator according to claim 1, characterized in that, Guide rods are fixedly connected to both sides of the switching block. Guide holes are provided on the surfaces of the fixing plates. The rod diameter of each guide rod is equal to the hole diameter of the corresponding guide hole. Each guide rod passes through the corresponding guide hole.

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