CN111646434B - Molecular sieve bed exhaust end cover of integrated stop valve for portable oxygen generator - Google Patents
Molecular sieve bed exhaust end cover of integrated stop valve for portable oxygen generator Download PDFInfo
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- CN111646434B CN111646434B CN202010660273.4A CN202010660273A CN111646434B CN 111646434 B CN111646434 B CN 111646434B CN 202010660273 A CN202010660273 A CN 202010660273A CN 111646434 B CN111646434 B CN 111646434B
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- exhaust end
- end cover
- valve
- molecular sieve
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- 239000002808 molecular sieve Substances 0.000 title claims abstract description 61
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 60
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000001301 oxygen Substances 0.000 title claims abstract description 57
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 57
- 238000007789 sealing Methods 0.000 claims description 29
- 229920001973 fluoroelastomer Polymers 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 15
- 238000000926 separation method Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000012528 membrane Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0259—Physical processing only by adsorption on solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0009—Physical processing
- C01B2210/0014—Physical processing by adsorption in solids
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention belongs to the technical field of oxygen generating equipment, and provides a molecular sieve bed exhaust end cover for an integrated stop valve of a portable oxygen generator, which comprises an exhaust end cover body (2), wherein a counter bore (16) is formed in the exhaust end cover body (2), an exhaust pipe joint (1) is arranged in the counter bore (16), a pre-tightening spring (15) is arranged below the exhaust pipe joint (1), a stop valve diaphragm (14) is arranged between the exhaust pipe joint (1) and the pre-tightening spring (15), and the lower end of the pre-tightening spring (15) is connected with the bottom of the counter bore (16).
Description
Technical Field
The invention belongs to the technical field of oxygen generating equipment, relates to a molecular sieve bed exhaust end cover, and particularly relates to an integrated stop valve molecular sieve bed exhaust end cover for a portable oxygen generator.
Background
The portable oxygenerator is a machine for separating and concentrating oxygen in air by using molecular sieves, and the principle of the portable oxygenerator is that the selective adsorption capacity of the molecular sieves on nitrogen and oxygen in the air is utilized, firstly, the air is compressed by a miniature oil-free compressor and then is input into a molecular sieve bed, and most of nitrogen in the air is adsorbed by using the difference of adsorption capacity of the molecular sieves on different gas components, so that most of oxygen flows through the molecular sieve bed and is not adsorbed, thereby realizing the separation of nitrogen and oxygen in the air, finally obtaining high-concentration oxygen. The portable oxygenerator is convenient to carry or can be used on a vehicle, and the oxygenerator has the same oxygenerator effect and principle as the desk oxygenerator.
In the prior art, the exhaust pipe joint is connected with a downstream air storage tank by a hose and is fastened by a binding belt. When leakage occurs in the pipeline connection or leakage occurs in the gas storage tank, after the oxygenerator is stopped, external steam can be sucked into the molecular sieve bed and adsorbed by the molecular sieve bed due to the vacuumizing effect (vacuum pressure is about-7 Psig) generated in the molecular sieve cooling process. If during a shut down of the oxygenerator the ambient temperature drops to dew point temperature, the water vapor inside the molecular sieve bed condenses and combines with a portion of the molecular sieve, which portion of the molecular sieve bed will not be desorbed again in the oxygenerator operating conditions, which will directly result in a decrease in the oxygen production flow and concentration of the oxygenerator, as the number of molecular sieves involved in the separation of air is reduced, i.e. the gas separation capacity of the molecular sieve bed is decreased. Meanwhile, a lip seal made of fluororubber is arranged on a driving shaft of the exhaust end of the molecular sieve bed exhaust end cover in the existing structure, and the lip faces an oxygen channel of the exhaust end cover. When the oxygenerator normally operates, because positive pressure is maintained in the exhaust end cover, the two lips can be respectively pressed on the outer surface of the driving shaft and the inner hole surface of the exhaust end cover by oxygen, so that sealing is formed, and oxygen leakage is prevented. However, when the oxygenerator is stopped and the molecular sieve is cooled to generate a vacuumizing effect, a negative pressure condition is formed inside the exhaust end cover, and the two lips are contracted inwards under the influence of the negative pressure and are separated from the outer surface of the driving shaft and the inner hole surface of the exhaust end cover, so that water vapor directly enters the exhaust end cover, and finally the gas separation capability of the molecular sieve bed is reduced.
Therefore, in order to solve the technical problem that the gas separation capacity of the molecular sieve bed is reduced due to the fact that water vapor enters the exhaust end cover, the invention provides the molecular sieve bed exhaust end cover for the integrated stop valve of the portable oxygen generator.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a molecular sieve bed exhaust end cover for an integrated stop valve of a portable oxygen generator, which is used for solving the problem that in the prior art, steam easily enters the exhaust end cover to cause the reduction of the gas separation capability of the molecular sieve bed.
To achieve the above and other related objects, the present invention provides a molecular sieve bed exhaust end cover for an integrated stop valve of a portable oxygen generator, comprising an exhaust end cover body, wherein a counter bore is provided on the exhaust end cover body, an exhaust pipe joint is provided in the counter bore, a pre-tightening spring is provided below the exhaust pipe joint, a stop valve membrane is provided between the exhaust pipe joint and the pre-tightening spring, and the lower end of the pre-tightening spring is connected with the bottom of the counter bore.
Preferably, the exhaust pipe joint is fastened to the exhaust end cover body by a screw.
Preferably, the diameter of the shutoff valve diaphragm is larger than the diameter of the exhaust pipe joint.
Preferably, the exhaust pipe joint is sleeved with an O-shaped ring, and the O-shaped ring is arranged at the joint of the exhaust pipe joint and the exhaust end cover body.
Preferably, the end cap is adhered to the exhaust end cap body, the end cap is arranged on the side where the side wall of the lower end of the exhaust pipe joint is located, the rotary valve sealing cover is fixed on the exhaust end cap body, the driving shaft is arranged in the middle of the exhaust end cap body and located in the rotary valve sealing cover, the upper end of the driving shaft is connected with the exhaust rotary valve, the valve plate is arranged below the exhaust rotary valve, the exhaust rotary valve is rotationally sealed with the valve plate, holes and grooves in the exhaust rotary valve are periodically communicated with a product oxygen channel on the valve plate, and the product oxygen channel is communicated with the exhaust pipe joint.
Preferably, an O-shaped sealing ring for sealing the exhaust rotary valve is arranged in the exhaust end cover body.
Preferably, the upper lip seal and the lower lip seal are sleeved on the driving shaft, a driving shaft sleeve is arranged below the lower lip seal, and the driving shaft sleeve is sleeved on the driving shaft.
Preferably, the lip of the upper lip seal faces the oxygen passage of the exhaust end cap body and the lip of the lower lip seal faces away from the oxygen passage of the exhaust end cap body.
Preferably, the pre-tightening spring is a high-precision stainless steel column spring.
Preferably, a fluororubber sealing layer is arranged on the stop valve membrane.
As described above, the molecular sieve bed exhaust end cover of the integrated stop valve for the portable oxygenerator has the following beneficial effects:
1. according to the invention, the exhaust pipe joint, the stop valve diaphragm and the pre-tightening spring are cooperatively arranged, so that the sealing effect of the exhaust valve end cover is good after the oxygenerator is stopped, thereby effectively protecting the molecular sieve, ensuring the gas separation capability of the molecular sieve bed, and further ensuring the oxygenerator oxygen production effect.
2. In the invention, the arrangement of the upper lip seal can ensure the seal when the oxygenerator operates; the lip shape of the lower lip type seal faces away from the oxygen channel of the exhaust end cover, so that when the oxygenerator is stopped and the molecular sieve generates negative pressure, even if the lip shape of the upper lip type seal loses sealing effect, the lip shape of the lower lip type seal can be respectively stuck to the outer surface of the driving shaft and the inner hole surface of the exhaust end cover under the negative pressure effect, thereby preventing that water vapor enters the molecular sieve bed to influence the gas separation capacity of the molecular sieve bed when the oxygenerator is stopped, further ensuring the gas separation capacity of the molecular sieve bed, and further ensuring the oxygen generation effect of the oxygenerator.
Drawings
Figure 1 shows a cross-sectional view of a molecular sieve bed.
Fig. 2 shows an enlarged schematic view at a.
Fig. 3 shows an enlarged schematic view at B.
Fig. 4 shows an enlarged schematic view at C.
Description of element reference numerals
The device comprises a 1-exhaust pipe joint, a 2-exhaust end cover body, a 3-plug, a 4-driving shaft sleeve, a 5-driving shaft, a 6-upper lip seal, a 7-molecular sieve bed, an 8-O-shaped sealing ring, a 9-valve plate, a 10-exhaust rotary valve, a 11-rotary valve sealing cover, a 12-screw, a 13-O-shaped ring, a 14-stop valve diaphragm, a 15-pre-tightening spring, a 16-counter bore and a 17-lower lip seal.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to fig. 1-2. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
Referring to fig. 1-2, the invention provides a molecular sieve bed exhaust end cover for an integrated stop valve of a portable oxygen generator, which comprises an exhaust end cover body 2, wherein a counter bore 16 is formed in the exhaust end cover body 2, an exhaust pipe joint 1 is arranged in the counter bore 16, a pre-tightening spring 15 is arranged below the exhaust pipe joint 1, a stop valve membrane 14 is arranged between the exhaust pipe joint 1 and the pre-tightening spring 15, and the lower end of the pre-tightening spring 15 is connected with the bottom of the counter bore 16. The stop valve diaphragm 14 is provided with a fluororubber sealing layer.
When the embodiment is used, when the oxygenerator is in operation, the product oxygen with a certain pressure downwards presses the stop valve diaphragm 14 to compress the pre-tightening spring 15 until the fluororubber sealing layer on the stop valve diaphragm 14 is separated from the exhaust pipe joint 1, so that an output channel of the product oxygen is opened, and the product oxygen can enter the exhaust pipe joint 1 from a gap between the stop valve diaphragm 14 and the exhaust pipe joint 1, so that the product oxygen enters the air storage tank through the exhaust pipe joint 1. When the oxygenerator stops running, the pre-tightening spring 15 is restored to the original state, and the elastic force generated by the pre-tightening spring 15 in the restoration process drives the stop valve diaphragm 14 to move upwards until the fluororubber sealing layer of the stop valve diaphragm 14 is pressed at the pipe orifice of the exhaust pipe joint 1, so that the exhaust pipe joint 1 is blocked, an effective seal is formed, the phenomenon that external steam is sucked into the molecular sieve bed 7 and adsorbed by the molecular sieve after the oxygenerator stops running is avoided, the gas separation capacity of the molecular sieve bed 7 is ensured, and the oxygen production flow and concentration of the oxygenerator are further ensured.
In this embodiment, the pre-tightening spring 15 is a high-precision stainless steel column spring, the spring stiffness is small, and the pressure required for opening the oxygen channel of the product is small. When the oxygenerator is stopped, the internal diameter of the exhaust pipe joint 1 is small, and the air pressure required for reversely opening the stop valve is large, so that the negative pressure generated in the cooling process of the molecular sieve is ensured not to open the stop valve.
Specifically, the diameter of the stop valve diaphragm 14 is larger than the diameter of the exhaust pipe joint 1, the area of the stop valve diaphragm 14 is 0.176 square inch, the inner diameter of the pipe joint is 0.093 inch, and the rigidity of the pre-tightening spring 15 is 1.333lbf/in. The theoretical calculation required a cut-off valve opening pressure of 1.64Psig, and based on the measured average opening pressure of 30 samples of 1.42Psig, the test data are shown in table 1. The pressure of the product oxygen is about 9Psig, so the design of the shut-off valve diaphragm 14 does not affect the operation of the oxygenerator.
TABLE 1
When the oxygenerator is shut down, the air pressure required to reverse flush the shut-off valve diaphragm 14 reaches 38.9Psig to push the shut-off valve open. In practice, even if there is leakage in the downstream of the exhaust end cover, the air pressure is only about 14Psig, so the design in this patent can ensure that the sealing effect of the exhaust end cover is good after the oxygenerator is stopped, thereby protecting the molecular sieve well.
In the present embodiment, the shutoff valve diaphragm 14 is not limited to the fluororubber seal layer, and may be made of an oxygen-resistant material other than fluororubber.
In the present embodiment, the pretensioning spring 15 is not limited to the high-precision stainless steel column spring, but may take other forms than a column spring, such as a conical spring.
In this embodiment, the exhaust pipe joint 1 is fastened to the exhaust end cover body 2 by a screw 12, and the connection mode between the exhaust pipe joint 1 and the exhaust end cover body 2 is not limited to the screw 12 connection, and other connection modes capable of realizing the connection between the exhaust pipe joint 1 and the exhaust end cover body 2, such as rivet connection, bolt connection, and the like, may be used.
As a further description of the above embodiment, the exhaust pipe joint 1 is sleeved with an O-ring 13, and the O-ring 13 is disposed at the connection position of the exhaust pipe joint 1 and the exhaust end cover body 2.
When the embodiment is used, the sealing performance of the stop valve can be ensured by the O-shaped ring 13, and the external leakage of the stop valve is prevented.
As a further description of the above embodiment, the exhaust end cover body 2 is adhered with the plug 3, the plug 3 is disposed on the side of the side wall of the lower end of the exhaust pipe joint 1, the exhaust end cover body 2 is fixed with the rotary valve sealing cover 11, the middle part of the exhaust end cover body 2 is provided with the driving shaft 5, the driving shaft 5 is located in the rotary valve sealing cover 11, the upper end of the driving shaft 5 is connected with the exhaust rotary valve 10, the valve plate 9 is disposed below the exhaust rotary valve 10, the exhaust rotary valve 10 is rotationally sealed with the valve plate 9, the hole and the groove on the exhaust rotary valve 10 are periodically conducted with the product oxygen channel on the valve plate 9, and the product oxygen channel is communicated with the exhaust pipe joint 1. An O-shaped sealing ring 8 for sealing the exhaust rotary valve 10 is arranged in the exhaust end cover body 2.
When the embodiment is used, the plug 3 is glued on the exhaust end cover body 2 by epoxy resin. The driving shaft 5 is driven by a stepping motor to drive the exhaust rotary valve 10 to rotate at a specific speed and is periodically communicated with the exhaust holes on the valve plate 9, so that the product oxygen separated and concentrated by the molecular sieve bed 7 is continuously output to a downstream air storage tank through the exhaust pipe joint 1. The O-ring seal 8 is used to seal the exhaust rotary valve 10 against leakage of product oxygen into the environment. The molecular sieve bed 7 is filled with molecular sieve for air separation to produce oxygen. In this example, 5 molecular sieve beds 7 having the same structure are used for circulating oxygen production. The structures of the plug 3, the rotary valve sealing cover 11, the driving shaft 5, the exhaust rotary valve 10, the valve plate 9, the molecular sieve bed 7, the product oxygen channel and the like, and the connection relationship and the position relationship between the structures belong to the prior art, and those skilled in the art can know the structures according to the prior art and the knowledge of the person, and the details are not repeated in this embodiment.
In this embodiment, the port plate 9 is sintered from silicon carbide, and the small holes on the port plate periodically communicate with the product oxygen channel during the rotation of the exhaust rotary valve 10, so as to output high-concentration oxygen generated by the molecular sieve bed 7. The exhaust rotary valve 10 is formed by injection molding and grinding self-lubricating engineering plastics, is rotationally sealed with the valve plate 9, and periodically conducts the oxygen passage of the valve plate 9 product through holes and grooves on the valve plate. The rotary valve seal cover 11 is secured to the exhaust end cover with screws 12 to seal the entire exhaust rotary valve 10.
As a further description of the above embodiment, the upper lip seal 6 and the lower lip seal 17 are sleeved on the driving shaft 5, and the driving shaft sleeve 4 is arranged below the lower lip seal 17, and the driving shaft sleeve 4 is sleeved on the driving shaft 5. The lip of the upper lip seal 6 faces the oxygen passage of the exhaust end cap body 2 and the lip of the lower lip seal 17 faces away from the oxygen passage of the exhaust end cap body 2.
In use of this embodiment, the length of the extended exhaust end cap is used to mount the tube segment of the drive shaft sleeve 4 and the lip seals, and the upper lip seal 6 and the lower lip seal 17 are mounted on this tube segment. The lip shape of the upper lip seal 6 still faces the oxygen channel of the exhaust end cover, so that the sealing of the oxygenerator during operation is ensured; the lip of the lower lip seal 17 faces away from the oxygen passage of the exhaust end cap. Thus, when the oxygenerator is stopped and the molecular sieve generates negative pressure, even if the upper lip seal 6 loses the sealing effect, the lip shape of the lower lip seal 17 is respectively stuck to the outer surface of the driving shaft 5 and the inner hole surface of the exhaust end cover under the negative pressure effect, so that the vapor is prevented from entering the molecular sieve bed 7 to influence the gas separation capability of the molecular sieve bed 7 when the oxygenerator is stopped, the gas separation capability of the molecular sieve bed 7 is further ensured, and the oxygen generation effect of the oxygenerator is further ensured.
In summary, the exhaust pipe joint, the stop valve diaphragm and the pre-tightening spring are cooperatively arranged, and the upper lip seal and the lower lip seal are arranged, so that the sealing effect of the exhaust valve end cover is good after the oxygenerator is stopped, the molecular sieve is effectively protected, the gas separation capability of the molecular sieve bed is ensured, and the oxygenerator effect is further ensured. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (8)
1. The utility model provides a molecular sieve bed exhaust end cover for portable oxygenerator's integrated stop valve, includes exhaust end cover body (2), its characterized in that: a counter bore (16) is formed in the exhaust end cover body (2), an exhaust pipe joint (1) is arranged in the counter bore (16), a pre-tightening spring (15) is arranged below the exhaust pipe joint (1), a stop valve diaphragm (14) is arranged between the exhaust pipe joint (1) and the pre-tightening spring (15), and the lower end of the pre-tightening spring (15) is connected with the bottom of the counter bore (16);
the exhaust end cover body (2) is adhered with a plug (3), the plug (3) is arranged on the side of the side wall of the lower end of the exhaust pipe joint (1), a rotary valve sealing cover (11) is fixed on the exhaust end cover body (2), a driving shaft (5) is arranged in the middle of the exhaust end cover body (2), the driving shaft (5) is positioned in the rotary valve sealing cover (11), the upper end of the driving shaft (5) is connected with an exhaust rotary valve (10), a valve plate (9) is arranged below the exhaust rotary valve (10), the exhaust rotary valve (10) is in rotary sealing with the valve plate (9), holes and grooves in the exhaust rotary valve (10) are periodically communicated with a product oxygen channel in the valve plate (9), and the product oxygen channel is communicated with the exhaust pipe joint (1);
in addition, the exhaust pipe joint (1) is fastened to the exhaust end cover body (2) by a screw (12).
2. The molecular sieve bed exhaust end cap for an integrated shut-off valve of a portable oxygenerator of claim 1, wherein: the diameter of the stop valve diaphragm (14) is larger than the diameter of the exhaust pipe joint (1).
3. The molecular sieve bed exhaust end cap for an integrated shut-off valve of a portable oxygenerator of claim 1, wherein: the exhaust pipe joint (1) is sleeved with an O-shaped ring (13), and the O-shaped ring (13) is arranged at the joint of the exhaust pipe joint (1) and the exhaust end cover body (2).
4. A molecular sieve bed exhaust end cap for an integrated shut-off valve of a portable oxygen generator as set forth in any one of claims 1 to 3 wherein: an O-shaped sealing ring (8) for sealing the exhaust rotary valve (10) is arranged in the exhaust end cover body (2).
5. The molecular sieve bed exhaust end cap for an integrated shut-off valve of a portable oxygen generator of claim 4, wherein: the upper lip seal (6) and the lower lip seal (17) are sleeved on the driving shaft (5), the driving shaft sleeve (4) is arranged below the lower lip seal (17), and the driving shaft sleeve (4) is sleeved on the driving shaft (5).
6. The molecular sieve bed exhaust end cap for an integrated shut-off valve of a portable oxygen generator of claim 5, wherein: the lip shape of the upper lip seal (6) faces the oxygen passage of the exhaust end cover body (2), and the lip shape of the lower lip seal (17) faces away from the oxygen passage of the exhaust end cover body (2).
7. The molecular sieve bed exhaust end cap for an integrated shut-off valve of a portable oxygen generator of claim 6, wherein: the pre-tightening spring (15) is a high-precision stainless steel column spring.
8. The molecular sieve bed exhaust end cap for an integrated shut-off valve of a portable oxygenerator of claim 1, wherein: and a fluororubber sealing layer is arranged on the stop valve diaphragm (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010660273.4A CN111646434B (en) | 2020-07-10 | 2020-07-10 | Molecular sieve bed exhaust end cover of integrated stop valve for portable oxygen generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010660273.4A CN111646434B (en) | 2020-07-10 | 2020-07-10 | Molecular sieve bed exhaust end cover of integrated stop valve for portable oxygen generator |
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| CN111646434A CN111646434A (en) | 2020-09-11 |
| CN111646434B true CN111646434B (en) | 2024-04-05 |
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| CN202010660273.4A Active CN111646434B (en) | 2020-07-10 | 2020-07-10 | Molecular sieve bed exhaust end cover of integrated stop valve for portable oxygen generator |
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| CN112661117A (en) * | 2020-09-15 | 2021-04-16 | 合肥雅美娜环境医疗设备有限公司 | Oxygen generator and oxygen generation method |
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| GB1536959A (en) * | 1975-11-05 | 1978-12-29 | Pennwalt Corp | Self regulating shutoff valve |
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