Shuttle valve structure of medical oxygen generator

Abstract

The shuttle valve structure of the medical oxygen generator comprises a shuttle valve seat used for being connected with an oxygen capacitor and two connecting pipes used for being connected with a molecular sieve tower, the shuttle valve seat comprises a first channel and a second channel connected with the oxygen capacitor, the first channel and the second channel are communicated with each other, a valve element is movably arranged in the first channel, and the valve element is connected with the molecular sieve tower. The two connecting pipes are communicated with the two ends of the first channel respectively, so that the valve element is switched to one connecting pipe to be communicated with the second channel, or the valve element is switched to the other connecting pipe to be communicated with the second channel, the two connecting pipes are communicated with each other through a communicating pipe, and an air resistor is arranged in the communicating pipe. According to the utility model, through the shuttle valve seat, the connecting pipe and the valve core, a traditional switching valve and a traditional one-way valve can be replaced, the oxygen generation effect is also achieved, the manufacturing cost of the whole machine is effectively reduced, meanwhile, the two-way alternate oxygen generation can be carried out through the switching of the valve core and the communicating pipe, and the oxygen generation efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a shuttle valve structure of a medical oxygen concentrator. Background Art

[0002] A one-way valve or a switching valve is usually installed between the molecular sieve tower and the oxygen storage tank of the medical oxygen generator to prevent a large amount of oxygen from being lost from the non-working molecular sieve tower during actual operation, thereby causing the flow rate or oxygen concentration of the oxygen generator to fail to reach the target value.

[0003] The molecular sieve tower and oxygen storage tank of the existing medical oxygen generator usually use a switching valve with an air block, a one-way valve with an air block or a double air block to ensure the oxygen production efficiency of the molecular sieve in the oxygen generator. The switching valve connection method requires program control and is expensive; the one-way valve connection method is relatively expensive; and the double air block connection method will form a large pressure loss at the air block, causing high pressure in the molecular sieve tower, reducing its oxygen production efficiency and increasing the power loss of the air compressor.

[0004] Therefore the prior art needs to be improved and enhanced. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the shuttle valve structure of the medical oxygen concentrator provided by the utility model can replace the traditional switching valve and the one-way valve, effectively reducing the manufacturing cost of the whole machine, and at the same time can perform two-way alternating oxygen production, and the oxygen production efficiency is relatively high.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A shuttle valve structure of a medical oxygen concentrator comprises a shuttle valve seat for connecting an oxygen gas container and two connecting pipes for connecting a molecular sieve tower, the shuttle valve seat comprises a first channel and a second channel connected to the oxygen gas container, the first channel and the second channel are communicated with each other, a valve core is movably provided inside the first channel, the two connecting pipes are respectively communicated with the two ends of the first channel, the valve core is switched to one connecting pipe to communicate with the second channel, or the valve core is switched to the other connecting pipe to communicate with the second channel, and the two connecting pipes are communicated with each other through a connecting pipe, and an air resistance is provided in the connecting pipe.

[0008] Furthermore, the connecting pipe is a three-way pipe, and the connecting pipe is provided with a first joint for connecting to the molecular sieve tower, a second joint connected to the shuttle valve seat, and a third joint connected to the connecting pipeline.

[0009] Furthermore, the valve core is a steel ball.

[0010] Furthermore, a sealing layer is provided on the end surface of the second joint.

[0011] Furthermore, the sealing layer is a silicone sealing layer.

[0012] Furthermore, auxiliary fixing portions are provided at the ends of the second joint and the third joint, and the auxiliary fixing portions are interference-fitted with the connecting pipe or the communicating pipe.

[0013] Furthermore, the cross section of the auxiliary fixing portion is triangular.

[0014] Furthermore, the connecting pipe is a flexible connecting pipe.

[0015] Compared with the prior art, the shuttle valve structure of the medical oxygen concentrator provided by the utility model includes a shuttle valve seat for connecting an oxygen gas container and two connecting pipes for connecting a molecular sieve tower, the shuttle valve seat includes a first channel and a second channel connected to the oxygen gas container, the first channel and the second channel are interconnected, a valve core is movably arranged inside the first channel, and the two connecting pipes are respectively connected to the two ends of the first channel, so that the valve core is switched to one connecting pipe to be connected to the second channel, or the valve core is switched to the other connecting pipe to be connected to the second channel, and the two connecting pipes are connected to each other through a connecting pipe, and an air block is arranged in the connecting pipe. According to the utility model, the shuttle valve seat, the connecting pipe and the valve core can replace the traditional switching valve and the one-way valve, and also play the effect of oxygen production, effectively reducing the manufacturing cost of the whole machine, and at the same time, the switching of the valve core and the connecting pipe can perform two-way alternating oxygen production, and the efficiency of oxygen production is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 This is a cross-sectional schematic diagram of the shuttle valve structure of the medical oxygen concentrator provided by the utility model.

[0018] In the figure: shuttle valve seat -1, connecting pipe -2, first channel -3, second channel -4, valve core -5, connecting pipe -6, air resistance -7, first joint -8, second joint -9, third joint -10, auxiliary fixing part -11. DETAILED DESCRIPTION

[0019] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0021] In the present utility model, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present utility model can be understood according to the specific circumstances.

[0022] In addition, the terms "first" and "second" etc. used in this application can be used to describe various elements in this article, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. When used here, the singular "one", "one" and "said / the" can also include plural forms, unless the context clearly indicates another way. It should also be understood that the terms "include / comprise" or "have" etc. specify the existence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of existing or adding one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0025] like Figure 1 As shown, the shuttle valve structure of the medical oxygen concentrator provided by the utility model includes a shuttle valve seat 1 for connecting an oxygen gas container and two connecting pipes 2 for connecting a molecular sieve tower, the shuttle valve seat 1 includes a first channel 3 and a second channel 4 connected to the oxygen gas container, the first channel 3 and the second channel 4 are communicated with each other, a valve core 5 is movably provided inside the first channel 3, the two connecting pipes 2 are respectively communicated with the two ends of the first channel 3, so that the valve core 5 is switched to one connecting pipe 2 to communicate with the second channel 4, or the valve core 5 is switched to the other connecting pipe 2 to communicate with the second channel 4, and the two connecting pipes 2 are communicated with each other through a connecting pipe 6, and an air resistance 7 is provided in the connecting pipe 6.

[0026] It can be understood that when the molecular sieve table of one of the connecting pipes 2 is connected to an air compressor, that is, the molecular sieve tower connected to one of the connecting pipes 2 is under high pressure, at this time, under the action of the gas, the valve core 5 will switch to connect one of the connecting pipes 2 with the second channel 4. According to the principle that the molecular sieve tower adsorbs nitrogen at high pressure and releases nitrogen at low pressure, the oxygen in the air passes through the molecular sieve tower connected to one of the connecting pipes 2, flows through the second channel 4, and finally enters the oxygen gas container for output. At this time, since the two connecting pipes 2 are connected to each other through the connecting pipe 6, an air block 7 is provided in the connecting pipe 6, so that a small amount of gas passes through the air block 7 and enters the other connecting pipe. 2, and finally discharged from the molecular sieve tower connected to the other connecting pipe 2 (the molecular sieve table is directly connected to the air), that is, the molecular sieve tower connected to the other connecting pipe 2 is in low pressure, and the nitrogen in the molecular sieve tower connected to the other connecting pipe 2 will be blown out at this time, thereby achieving the effect of nitrogen discharge, that is, the molecular sieve tables connected to the two connecting pipes 2 can achieve the effect of alternating oxygen production, and the efficiency of oxygen production is high, and an air resistance 7 is provided in the connecting pipe 6, no matter which molecular tower connected to the connecting pipe 2 is connected to the air compressor, most of the gas produced by the molecular sieve tower is stored in the oxygen gas container through the second channel 4, so that the oxygen is used to be output to the user end.

[0027] Compared with the prior art, in the technical solution of the utility model, the shuttle valve seat 1, the connecting pipe 2 and the valve core 5 can replace the traditional switching valve and the one-way valve, and also play the effect of oxygen production, which effectively reduces the manufacturing cost of the whole machine. At the same time, the switching of the valve core 5 and the connecting pipe 6 can perform two-way alternating oxygen production, and the oxygen production efficiency is relatively high. In addition, the single air resistance 7 is used to prevent the pressure in the molecular sieve table from being too high, which increases the power loss of the air compressor and reduces the efficiency of oxygen production.

[0028] In one embodiment, the connecting pipe 2 is a three-way pipe, and the connecting pipe 2 is provided with a first joint 8 for connecting to the molecular sieve tower, a second joint 9 connected to the shuttle valve seat 1 and a third joint 10 connected to the connecting pipe 2 .

[0029] It can be understood that when the molecular sieve table connected to one of the connecting pipes 2 is connected to an air compressor, after the oxygen sieved by the molecular sieve table enters the interior of one of the connecting pipes 2 through the first joint 8, a part of the oxygen enters the first channel 3 through the second joint 9. Under the action of the gas, the valve core 5 moves toward the second joint 9 of the other connecting pipe 2, so that the valve core 5 blocks the second joint 9 of the other connecting pipe 2, so that this part of the oxygen enters the second channel 4 from the first channel 3 and finally enters the oxygen gas container. At this time, another part of the oxygen enters the connecting pipe 6 through the third joint 10. Due to the obstruction of the air resistance 7, only a small part of this part passes through the air resistance 7 and enters the other connecting pipe 2, and finally enters the molecular sieve tower connected to the other connecting pipe 2, and blows out the nitrogen of the molecular sieve table, thereby achieving the effect of oxygen production.

[0030] It should be noted that, since both ends of the first channel 3 are blocked by the second joints 9 of the two connecting pipes 2, that is, the second joints 9 of the two connecting pipes 2 can limit the movement stroke of the valve core 5, that is, the valve core 5 can be switched to the second channel 4 to connect with one connecting pipe 2, or, the valve core 5 can be switched to the second channel 4 to connect with another connecting pipe 2.

[0031] It should be noted that the molecular sieve tower connected to the other connecting pipe 2 can also be used to connect to an air compressor, and the specific working principle is the same as the working principle of the molecular sieve tower connected to the one connecting pipe 2 mentioned above and the air compressor, that is, the shuttle valve structure of the medical oxygen generator of the present application has no direction distinction, that is, the molecular sieve towers connected to the two connecting pipes 2 can be connected to the air compressor for bidirectional oxygen production.

[0032] Furthermore, the valve core 5 is a steel ball. When the valve core 5 is acted upon by the gas, the steel ball can move better, so that the valve core 5 can switch different channels to produce oxygen.

[0033] Furthermore, a sealing layer is provided on the end surface of the second joint 9, and the sealing layer is a silicone sealing layer. When the valve core 5 is blown by gas from the first joint 8 of one connecting pipe 2 to contact the second joint 9 of another connecting pipe 2, the sealing layer can make the valve core 5 contact the second joint 9 more closely, that is, it can ensure that oxygen flows from the second channel 4 into the oxygen gas container, and prevent the prepared oxygen from leaking out from the second joint 9 of the other connecting pipe 2.

[0034] Further, the ends of the second joint 9 and the third joint 10 are provided with auxiliary fixing portions 11, and the auxiliary fixing portions 11 are interference fit with the connecting pipe 2 or the connecting pipe 6. The auxiliary fixing portions 11 can facilitate a more stable connection between the second joint 9 and the first channel 3, and the auxiliary fixing portions 11 can facilitate a more stable connection between the third joint 10 and the connecting pipe 6.

[0035] Preferably, the cross section of the auxiliary fixing portion 11 is triangular, which can facilitate the connection between the second joint 9 and the first channel 3 and the connection between the third joint 10 and the connecting pipe 6 .

[0036] Furthermore, the connecting pipe 6 is a flexible connecting pipe 6 , which can facilitate the installation of the air block 7 and the connecting pipe 6 , and ensure that the outer wall of the air block 7 is sealed and connected to the inner wall of the connecting pipe 6 .

[0037] In summary, the shuttle valve structure of the medical oxygen concentrator provided by the utility model, the valve core is a steel ball, which is convenient for the valve core to switch different channels for oxygen production, the sealing layer can ensure that oxygen flows from the second channel into the oxygen gas container, and prevents the produced oxygen from leaking out from the second joint of the other connecting pipe, and the auxiliary fixing part can facilitate the second joint to be connected to the first channel more stably and facilitate the third joint to be connected to the connecting pipe more stably. Compared with the prior art, in the technical solution of the utility model, the shuttle valve seat, the connecting pipe and the valve core can replace the traditional switching valve and the one-way valve, and also play the role of oxygen production, effectively reducing the production cost of the whole machine, and at the same time, the switching of the valve core and the connecting pipe can perform two-way alternating oxygen production, and the efficiency of oxygen production is relatively high, and the use of a single air resistance can prevent the pressure in the molecular sieve table from being too high, increase the power loss of the air compressor, and reduce the efficiency of oxygen production.

[0038] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, which all belong to the protection scope of the utility model.

Claims

1. A shuttle valve structure for a medical oxygen concentrator, characterized in that: The invention comprises a shuttle valve seat (1) for connecting an oxygen gas container and two connecting pipes (2) for connecting a molecular sieve tower. The shuttle valve seat (1) comprises a first channel (3) and a second channel (4) connected to the oxygen gas container. The first channel (3) and the second channel (4) are connected to each other. A valve core (5) is movably arranged inside the first channel (3). The two connecting pipes (2) are respectively connected to the two ends of the first channel (3). The valve core (5) is switched to one connecting pipe (2) to connect to the second channel (4), or the valve core (5) is switched to the other connecting pipe (2) to connect to the second channel (4). The two connecting pipes (2) are connected to each other through a connecting pipe (6). An air block (7) is arranged in the connecting pipe (6).

2. The shuttle valve structure of the medical oxygen concentrator according to claim 1, characterized in that: The connecting pipe (2) is a three-way pipe, and is provided with a first joint (8) for connecting to the molecular sieve tower, a second joint (9) connected to the shuttle valve seat, and a third joint (10) connected to the connecting pipe (2).

3. The shuttle valve structure of the medical oxygen concentrator according to claim 1, characterized in that: The valve core (5) is a steel ball.

4. The shuttle valve structure of the medical oxygen concentrator according to claim 2, characterized in that: The end surface of the second joint (9) is provided with a sealing layer.

5. The shuttle valve structure of the medical oxygen concentrator according to claim 4, characterized in that: The sealing layer is a silicone sealing layer.

6. The shuttle valve structure of the medical oxygen concentrator according to claim 2, characterized in that: The ends of the second joint (9) and the third joint (10) are provided with auxiliary fixing portions (11), and the auxiliary fixing portions (11) are interference-fitted with the connecting pipe (2) or the connecting pipe (6).

7. The shuttle valve structure of the medical oxygen concentrator according to claim 6, characterized in that: The cross section of the auxiliary fixing portion (11) is triangular.

8. The shuttle valve structure of the medical oxygen concentrator according to claim 1, characterized in that: The connecting pipe (6) is a flexible connecting pipe.

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