Pressure reduction constant flow valve for oxygen generator

Abstract

The decompression constant flow valve is mainly characterized in that a constant flow channel, a decompression channel and a key groove are formed in the inner wall of a valve body, the key groove is formed in one end of the inner wall of the valve body, the constant flow channel penetrates through the two end faces of the valve body, and a buffering cavity is formed between the valve body and the interior of an exhaust connector body. The valve has the beneficial effects that the movement space required by the diaphragm in the inner cavity of the valve body is avoided; the valve is simple in structure, does not depend on a multi-aperture flow-limiting hole structure of the flow-limiting disc, achieves output of constant-value flow, reduces the size of the valve body, and meets the use requirement of the portable oxygen generator with the constant-value flow.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure reducing valve, in particular to a kind of pressure reducing constant flow valve for oxygen generator. BACKGROUND

[0002] The utility model discloses a novel household oxygen generator pressure reducing valve of Chinese utility model patent publication number CN212804418U is through the pressure range that pressure regulating assembly is adjusted is realized stable pressure output after flexible trace compensation of diaphragm, so that it continues stable voltage.This structure has the disadvantages in that: because air pressure is compensated by diaphragm, that is, diaphragm needs own movement space in the inner cavity of valve body.Therefore, in some portable constant value flow oxygen generator, the pressure reducing valve cannot meet installation in its volume.

[0003] The utility model discloses a household oxygen generator constant flow meter of Chinese utility model patent publication number CN214667068U is through the aperture adjustment of 10 flow limiting holes of flow limiting disc to make its flow constant adjustment, and this structure cannot be installed in portable constant value flow oxygen generator due to the larger volume of flow limiting disc.

[0004] To this end, the utility model provides a kind of pressure reducing constant flow valve for oxygen generator. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the deficiencies in the prior art, and provides a pressure reducing constant flow valve for oxygen generator, which has small volume and can realize constant value flow output, to meet the use of portable constant value flow oxygen generator.

[0006] To overcome the above technical problems, the utility model adopts the technical scheme that:

[0007] It is characterized in that: the inside of one end of the adapter and the inside of the air inlet connector body form a high-pressure cavity, a rubber plug and a gas sealing spring are arranged in the high-pressure cavity, the rubber plug is connected with the gas sealing spring, the gas sealing spring is arranged at the inner end of the air inlet connector body, and the rubber plug is arranged at the inner end of one end of the adapter,

[0008] The inside of the other end of the adapter and the inside of the valve body form a stable pressure cavity, a piston and a pressure limiting spring are arranged in the stable pressure cavity, the piston is arranged at the inner end of the other end of the adapter, a sealing ring is arranged on the outer diameter of the piston, the stable pressure cavity is divided into a piston cavity by the piston through the sealing ring, and the pressure limiting spring is arranged in the piston cavity of the valve body,

[0009] One end of the piston is connected with the pressure limiting spring, the other end of the piston is connected with the ejector rod, the other end of the ejector rod is connected with the rubber plug through the clearance fit between the inner hole of the adapter and the ejector rod,

[0010] The inner wall of the valve body is provided with a flow regulating channel, a pressure relief channel and a key groove, the key groove is arranged at one end of the inner wall of the valve body, one end of the flow regulating channel penetrates the end face of the key groove at one end of the valve body, the other end of the flow regulating channel penetrates the other end face of the inner wall of the valve body,

[0011] The valve body and the inner part of the exhaust connector body form a buffer cavity.

[0012] Further, the flow regulating channel is a stepped hole.

[0013] Further, the large hole of the stepped hole penetrates the end face of the key groove at one end of the inner wall of the valve body.

[0014] Further, the small hole of the stepped hole penetrates the other end of the inner wall of the valve body.

[0015] Further, the central axis of the flow regulating channel is parallel to the central axis of the valve body.

[0016] Further, the central axis of the pressure relief channel is perpendicular to the central axis of the valve body, and the pressure relief channel penetrates the piston cavity.

[0017] Further, the central axes of the adapter, the air inlet connector body, the valve body and the exhaust connector body are concentric.

[0018] Further, the valve body and the exhaust connector body are connected by threads.

[0019] Further, the valve body and the exhaust connector body are welded.

[0020] Further, the number of key grooves and flow regulating channels is at least one group.

[0021] Further, the number of key grooves and flow regulating channels is several, each key groove is arranged in an annular array at one end of the inner wall of the valve body, one end of each flow regulating channel penetrates the end face of the key groove at one end of the valve body, the other end of each flow regulating channel penetrates the other end face of the inner wall of the valve body.

[0022] Further, it further comprises a ball arranged in each flow regulating channel through interference fit.

[0023] Further, the number of balls is less than the number of flow regulating channels.

[0024] Compared with the prior art, the beneficial effects of the utility model are: first, the diaphragm is free from the need for its own movement space in the inner cavity of the valve body; second, the flow limiting hole structure is not dependent on the flow limiting disc multi-aperture, realizes the output of the fixed value flow, and reduces the valve body volume, and meets the portable fixed value flow oxygen generator use. BRIEF DESCRIPTION OF DRAWINGS

[0025] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0026] Figure 1 It is a front view of a pressure reducing fixed flow valve for an oxygen generator.

[0027] Figure 2 It is Figure 1 the sectional view along A-A line.

[0028] Figure 3 It is a perspective view of the valve body of the pressure reducing fixed flow valve for the oxygen generator.

[0029] Figure 4 It is the front view of Figure 3 .

[0030] Figure 5 It is the right view of Figure 3 .

[0031] Figure 6 It is the sectional view along B-B line. Figure 4

[0032] It is the sectional view along C-C line. Figure 7 Figure 5

[0033] BRIEF DESCRIPTION OF DRAWINGS

[0034] 1-gas inlet connector body, 2-adaptor, 3-valve body, 4-gas outlet connector body, 5-high pressure cavity, 6-rubber plug, 7-gas sealing spring 7, 8-pressure stabilizing cavity, 9-top rod, 10-piston, 11-pressure limiting spring, 13-sealing ring, 14-piston cavity, 15-fixed flow channel, 16-pressure relief channel, 17-key groove, 18-buffer cavity, 19-sphere. DETAILED DESCRIPTION

[0035] Example 1

[0036] Figures 1-2 ​​As shown, a pressure reducing and constant flow valve for an oxygen generator is disclosed, comprising an adapter 2, an air inlet connector body 1 connected to one end of the adapter 2, a valve body 3 connected to the other end of the adapter 2, an air outlet connector body 4 connected to the valve body 3, a high-pressure cavity 5 formed between the inside of one end of the adapter 2 and the inside of the air inlet connector body 1, a rubber plug 6 and an air sealing spring 7 arranged in the high-pressure cavity 5, the rubber plug 6 connected to the air sealing spring 7, the air sealing spring 7 arranged at the inner end of the air inlet connector body 1, and the rubber plug 6 arranged at the inner end of one end of the adapter 2,

[0037] a stable pressure cavity 8 formed between the inside of the other end of the adapter 2 and the inside of the valve body 3, a piston 10 and a pressure limiting spring 11 arranged in the stable pressure cavity 8, the piston 10 arranged at the inner end of the other end of the adapter 2, a sealing ring 13 arranged on the outer diameter of the piston 10, the piston 10 separating the stable pressure cavity 8 into a piston cavity 14 through the sealing ring 13, and the pressure limiting spring 11 arranged in the piston cavity 14 of the valve body 3,

[0038] one end of the piston 10 connected to the pressure limiting spring 11, the other end of the piston 10 connected to a jack 9, and the other end of the jack 9 connected to the rubber plug 6 through the clearance fit between the inner hole of the adapter 2,

[0039] a constant flow channel 15, a pressure relief channel 16, and a key groove 17 arranged on the inner wall of the valve body 3, the key groove 17 arranged at one end of the inner wall of the valve body 3, the constant flow channel 15 penetrating through the end face of one end of the valve body 3, the other end of the constant flow channel 15 penetrating through the other end face of the inner wall of the valve body 3, and a buffer cavity 18 formed between the valve body 3 and the inside of the air outlet connector body 4. The pressure relief channel 16 is located at the piston cavity 14, penetrates through the piston cavity 14, and reduces the hysteresis caused by the pressure balance speed of the pressure limiting spring 11, so that the pressure limiting spring 11 provides the main pressure and balances the pressure of the stable pressure cavity at 50kPa. Since one end of the piston 10 is connected to the pressure limiting spring 11, the other end of the piston 10 is connected to the jack 9, the jack 9 is clearance fit with the inner hole of the adapter 2, and the other end of the jack 9 is connected to the rubber plug 6, when the pressure limiting spring 11 and the air sealing spring 7 are balanced, there is a gap between the rubber plug 6 and the adapter 2, and then the gas enters the high-pressure cavity 5 from the air inlet connector body 1, enters the inner hole of the adapter 2 through the gap between the rubber plug 6 and the adapter 2, and flows through the constant flow channel 15 along the key groove 17 from the inner hole of the adapter 2 to the buffer cavity 18, and then is discharged through the air outlet connector body 4, thereby realizing the constant flow output of the gas.

[0040] In the above process, when the gas enters the inner hole of the adapter 2 through the gap between the rubber plug 6 and the adapter 2, and reaches the pressure stabilizing cavity 8, the gas is blocked by the piston 10 to form a resistance return. Since the key groove 17 is at one end of the inner wall and is opposite to the piston 10, the key groove 17 is not in the return route of the gas, so the returned gas reaches the key groove 17 and reaches the buffer cavity 18 after being rectified by the flow regulating channel 15. At this time, the buffer cavity 18 reduces the flow rate of the gas and makes it discharged from the exhaust connector body 4.

[0041] The central axis of the pressure relief channel 16 is perpendicular to the central axis of the valve body 3. The valve body 3 and the exhaust connector body 4 are connected by threads.

[0042] In this embodiment, the flow regulating channel 15 is implemented by the key groove 17 and the flow regulating channel 15, which is at least one group. The flow regulating channel 15 is a stepped hole, the large hole of the stepped hole is connected with the key groove 17 at one end of the inner wall of the valve body 3, and the small hole of the stepped hole is connected with the other end of the inner wall of the valve body 3. Therefore, the returned gas reaches the large hole of the stepped hole through the key groove 17, and the gas is pressurized through the small hole of the stepped hole, and then the gas is output along the path of the small hole of the hole.

[0043] The central axes of the adapter 2, the air inlet connector body 1, the valve body 3, and the exhaust connector body 4 are concentric. As can be seen, the adapter 2, the air inlet connector body 1, the valve body 3, and the exhaust connector body 4 are connected in an axial flow structure. Since the flow regulating channel 15 is arranged on the inner wall of the valve body and the central axis of the flow regulating channel 15 is parallel to the central axis of the valve body 3, the space of the valve body 3 and the space required for gas pressurization are saved. Compared with the prior art, first, the diaphragm does not need to move in the inner cavity of the valve body; second, the flow regulating channel structure does not depend on the flow limiting hole structure of the flow limiting disc with multiple diameters, which realizes the output of the constant flow and reduces the volume of the valve body, and meets the use of portable constant flow oxygen generator.

[0044] In addition, in some embodiments, the valve body 3 and the exhaust connector body 4 are welded, which can still reduce the volume of the valve body.

[0045] Embodiment 2

[0046] This embodiment is further derived based on the basis of embodiment 1, such as Figures 3-7 As can be seen, the key groove 17 and the flow regulating channel 15 are several, each key groove 17 is annularly arranged at one end of the inner wall of the valve body 3, and each flow regulating channel 15 penetrates the end face of the key groove 17 at one end of the valve body 3 and the other end of the inner wall of the valve body 3.

[0047] Similarly, the fixed flow channel 15 is a stepped hole, the large hole of the stepped hole is in communication with the key groove 17 at one end of the inner wall of the valve body 3, and the small hole of the stepped hole is in communication with the other end of the inner wall of the valve body 3. In this way, by arranging the key groove 17 and the fixed flow channel 15 at the inside of the valve body 3, the predetermined gas flow output is achieved. The other technical effects are the same as those of embodiment 1.

[0048] Embodiment 3

[0049] Further derivation based on embodiment 2, such as Figure 7 It can be seen that the number of the balls 19 arranged in each fixed flow channel 15 by interference fit is less than the number of the fixed flow channels 15. The minimum number of the balls 19 is 1, and the maximum number of the balls 19 is less than the number of the fixed flow channels 15 by one. It can be seen that, in the case of unchanged valve body structure, the output capacity of the fixed value flow of the gas is changed by arranging the balls 19 in the fixed flow channels 15, and then the utilization rate of the valve body 3 is improved, the batch production of the valve body is realized, and the production cost is reduced. At the same time, the interchangeability between the valve body 3 and the oxygen generator is improved to meet the different fixed value flow requirements of the oxygen generator.

[0050] In addition, it can be seen from the derivation of the above several embodiments that, in some other embodiments, the aperture of the fixed flow channel 15 on the valve body 3 can be fixed or different fixed flow channels 15 with different apertures.

[0051] The utility model is not limited to the precise structure which has been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. A pressure reducing and constant flow valve for an oxygen generator, comprising a switching piece (2), an inlet joint body (1) connected to one end of the switching piece (2), a valve body (3) connected to the other end of the switching piece (2), and an outlet joint body (4) connected to the valve body (3), characterized in that: The high-pressure cavity (5) is formed between the inside of one end of the adapter (2) and the inside of the air inlet connector body (1), a rubber plug (6) and an air sealing spring (7) are arranged in the high-pressure cavity (5), the rubber plug (6) is connected with the air sealing spring (7), the air sealing spring (7) is arranged at the inner end of the air inlet connector body (1), and the rubber plug (6) is arranged at the inner end of one end of the adapter (2), The stable-pressure cavity (8) is formed between the inside of the other end of the adapter (2) and the inside of the valve body (3), a piston (10) and a pressure limiting spring (11) are arranged in the stable-pressure cavity (8), the piston (10) is arranged at the inner end of the other end of the adapter (2), the piston (10) is provided with a sealing ring (13) on the outer diameter, the stable-pressure cavity (8) is divided into a piston cavity (14) by the sealing ring (13), and the pressure limiting spring (11) is arranged in the piston cavity (14) of the valve body (3), One end of the piston (10) is connected with the pressure limiting spring (11), the other end of the piston (10) is connected with a jack (9), the other end of the jack (9) is connected with the rubber plug (6) through the clearance fit between the jack (9) and the inner hole of the adapter (2), The inner wall of the valve body (3) is provided with a flow limiting channel (15), a pressure relief channel (16) and a key groove (17), the key groove (17) is arranged at one end of the inner wall of the valve body (3), one end of the flow limiting channel (15) penetrates the end face of the key groove (17) at one end of the valve body (3), and the other end of the flow limiting channel (15) penetrates the other end face of the inner wall of the valve body (3), The valve body (3) and the air outlet connector body (4) form a buffer cavity (18) between the inside of the valve body (3) and the inside of the air outlet connector body (4).

2. The pressure reducing and flow regulating valve for an oxygen generator according to claim 1, characterized in that: The flow limiting channel (15) is a stepped hole.

3. The pressure reducing and flow regulating valve for an oxygen generator according to claim 2, wherein: The large hole of the stepped hole penetrates the end face of the key groove (17) at one end of the inner wall of the valve body (3).

4. The pressure reducing and flow regulating valve for an oxygen generator according to claim 2, wherein: The small hole of the stepped hole penetrates the other end of the inner wall of the valve body (3).

5. The pressure reducing and flow regulating valve for an oxygen generator according to claim 2, wherein: The central axis of the flow limiting channel (15) is parallel to the central axis of the valve body (3).

6. The pressure reducing and flow regulating valve for an oxygen generator according to claim 1, wherein: The central axis of the pressure relief channel (16) is perpendicular to the central axis of the valve body (3), and the pressure relief channel (16) penetrates the piston cavity (14).

7. The pressure reducing and flow regulating valve for an oxygen generator according to claim 1, wherein: The central axes of the adapter (2), the air inlet connector body (1), the valve body (3) and the air outlet connector body (4) are concentric.

8. The pressure reducing and flow regulating valve for an oxygen generator according to claim 1, wherein: The valve body (3) and the air outlet connector body (4) are connected through threads.

9. The pressure reducing and flow regulating valve for an oxygen generator according to claim 1, wherein: The valve body (3) and the air outlet connector body (4) are welded.

10. The pressure reducing and flow regulating valve for an oxygen generator according to claim 1, wherein: The number of the key groove (17) and the flow limiting channel (15) is at least one group.

11. The pressure reducing and flow regulating valve for an oxygen generator according to claim 1, characterized in that: The number of the key groove (17) and the flow limiting channel (15) is several, each key groove (17) is arranged in an annular array at one end of the inner wall of the valve body (3), one end of each flow limiting channel (15) penetrates the end face of the key groove (17) at one end of the valve body (3), and the other end of each flow limiting channel (15) penetrates the other end face of the inner wall of the valve body (3).

12. The pressure reducing and flow regulating valve for an oxygen generator according to claim 11, wherein: A ball (19) arranged in each flow limiting channel (15) through interference fit is further included.

13. The pressure reducing and flow regulating valve for an oxygen generator according to claim 12, wherein: The number of the ball (19) is less than the number of the flow limiting channel (15).

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