CN111271489A - A kind of pneumatic combination valve for oxygen generator - Google Patents

Abstract

The invention discloses a pneumatic combination valve for an oxygen generator, which comprises a pilot electromagnetic valve for controlling a gas circuit switch, a cover plate fixedly arranged below the pilot electromagnetic valve, a valve body fixedly arranged below the cover plate and a push rod assembly arranged in the valve body, wherein the side surface of the valve body is provided with a gas inlet for inputting air, a gas outlet for discharging nitrogen, an A port communicated with a molecular sieve cylinder and a B port communicated with the molecular sieve cylinder, and the gas inlet, the gas outlet, the A port and the B port are positioned on the same side surface of the valve body. According to the technical scheme provided by the invention, the air passages of the port A and the port B are specially designed, so that a cavity is formed in the port A and the port B, an impedance silencing effect is realized, the gas switching and exhaust noise of the pneumatic combination valve is effectively reduced, and the working noise of the whole molecular sieve oxygen generation system is further reduced.

Description

A kind of pneumatic combination valve for oxygen generator

technical field

The invention relates to the technical field of pneumatic valves, in particular to a pneumatic combined valve for an oxygen generator.

Background technique

There are many kinds of household oxygen generators on the market. Due to the different principles of oxygen generation, the use characteristics of each household oxygen generator are also different. The oxygen principles of household oxygen production mechanism are: 1. The principle of molecular sieve; 2. The principle of polymer oxygen-enriched membrane; 3. The principle of electrolysis of water; 4. The principle of chemical reaction oxygen production. The molecular sieve oxygen generator is the only mature oxygen generator with international and national standards.

Molecular sieve oxygen production system, also known as molecular sieve pressure swing adsorption PSA oxygen production system, uses molecular sieve (molecular sieve) as adsorbent, and uses ambient air as raw material through pressure swing adsorption (PSA) method, under the condition of normal temperature and low pressure , using molecular sieves to increase the adsorption capacity of nitrogen (adsorbate) in the air when pressurized, and reduce the adsorption capacity of nitrogen in the air when decompressed, forming a rapid cycle process of pressurized adsorption and decompression desorption, so that the Oxygen and nitrogen can be separated, and carbon dioxide, gaseous acid and other gaseous oxides in the air are substances with strong molecular polarity, which are difficult to pass through molecular sieves, so that the purity of oxygen produced by oxygen can reach 93% v/v above.

The existing molecular sieve oxygen generation system scheme includes pneumatic combination valve and oxygen generation components. The pneumatic combination valve used in the existing molecular sieve oxygen generation system has relatively large noise during the intake and exhaust process, which leads to the whole molecular sieve oxygen generation system. The increase of noise greatly reduces the user's comfort, and the user experience is poor.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a pneumatic combination valve for an oxygen generator, which effectively reduces the noise during gas switching and exhaust of the pneumatic combination valve, and improves the use experience of the molecular sieve oxygen generation system.

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is as follows:

The invention provides a pneumatic combined valve for an oxygen generator, which comprises a pilot solenoid valve for controlling the gas circuit switch, a cover plate fixedly arranged under the pilot solenoid valve, a valve body fixedly arranged under the cover plate, and a valve body mounted on the The push rod assembly inside the valve body, the side of the valve body is provided with an air inlet for inputting air, an air outlet for discharging nitrogen, an A port communicating with the molecular sieve cylinder and a B port communicating with the molecular sieve cylinder. The intake port, the exhaust port, the A port and the B port are located on the same side of the valve body, the A port includes a first air passage and a second air passage, the first air passage and the second air passage The diameter of the first airway is larger than the diameter of the second airway; the B port includes a third airway and a fourth airway, and the third airway is in communication with the fourth airway, The diameter of the third airway is larger than the diameter of the fourth airway.

A further solution of the above solution is that the first airway, the second airway, the third airway and the fourth airway are all cylindrical airways.

A further solution of the above solution is that the first air passage and the second air passage are integrally formed, and the third air passage and the fourth air passage are integrally formed.

A further solution of the above solution is to further include a front cover plate, the front cover plate is covered on the side of the valve body where the A port is located, and the front cover plate is provided with a second air channel that communicates with the first air channel. , a fourth air passage, an air inlet and an exhaust port communicating with the third air passage, the air inlet and the exhaust port are located in the middle area of the front cover plate along the vertical direction, the second The air passages and the fourth air passages are located on both sides of the front cover plate along the lateral direction.

A further solution of the above solution is that the exhaust port and the intake port are arranged in parallel along the lateral direction, the exhaust port is located above the intake port; the A port is located at one side of the exhaust port. side, the B port is located on the other side of the exhaust port, the A port and the B port are located on the same horizontal line

A further solution of the above solution is that a push rod cavity for accommodating a push rod assembly is opened inside the valve body, and the push rod assembly includes an upper seal assembly, a push rod, a lower seal assembly and a fixing device, and the upper seal assembly is clamped. The lower seal assembly is clamped on the lower end of the push rod, and the fixing device is arranged below the lower seal assembly.

A further solution of the above solution is that the upper sealing assembly includes an upper sealing cover whose sealing cover is arranged on the upper end of the push rod cavity and an upper diaphragm that is clamped with the pushing rod; the lower sealing assembly includes a sealing cover arranged in the pushing rod cavity. The lower sealing cover at the lower end of the body and the lower diaphragm clamped with the push rod; the fixing device is a circlip.

A further solution of the above solution is that a first ventilation hole is opened in the central area of the upper sealing cover, and a first sealing ring is arranged on the outer periphery of the first ventilation hole.

Preferably, the number of the push rod cavity is 2, and the number of the push rod assembly is 2

Compared with the prior art, the technical solution of the present invention has the following advantages and beneficial effects: the present invention provides a pneumatic combined valve for an oxygen generator, which includes a pilot solenoid valve for controlling a gas circuit switch, a pilot solenoid valve fixedly arranged on the pilot solenoid valve The lower cover plate, the valve body fixedly arranged under the cover plate, and the push rod assembly installed inside the valve body, the side of the valve body is provided with an air inlet for inputting air and an air outlet for discharging nitrogen , The A port communicated with the molecular sieve cylinder and the B port communicated with the molecular sieve cylinder, the air inlet, the exhaust port, the A port and the B port are located on the same side of the valve body, and the A port includes the first airway and a second airway, the first airway communicates with the second airway, the diameter of the first airway is larger than the diameter of the second airway; the B port includes a third airway and a second airway. Four air passages, the third air passage communicates with the fourth air passage, and the diameter of the third air passage is larger than the diameter of the fourth air passage. In the technical solution provided by the present invention, by specially designing the air passages of the A port and the B port, a cavity is formed in the A port and the B port, which plays the role of impedance silencing and effectively reduces the gas switching and exhausting of the pneumatic combination valve. Gas noise, thereby reducing the working noise of the molecular sieve oxygen production system.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a three-dimensional schematic diagram of a pneumatic combination valve in an embodiment;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is A-A sectional view in Fig. 2;

4 is a schematic three-dimensional structure diagram of a pneumatic combination valve in another embodiment;

Fig. 5 is the full sectional view of Fig. 4;

Fig. 6 is the front view of Fig. 4;

FIG. 7 is a B-B cross-sectional view of FIG. 6 .

In the figure: 1-pilot solenoid valve; 2-cover plate; 3-exhaust port; 4-inlet port; 5-A port; 51-first air passage; 52-second air passage; 6-valve body; 7-B port; 71-third airway; 72-fourth airway; 8-front cover; 911-left upper sealing cover; 912-right upper sealing cover; 921-left upper diaphragm; 922 - Right upper diaphragm, 931 - Left first vent hole; 932 - Right first vent hole; 101 - Left push rod; 102 - Right push rod; 11 - Fixing device; 21 - Lower sealing cover; 22- Lower diaphragm.

Detailed ways

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, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "comprising" and "having" in the description and claims of the present invention and the above-mentioned drawings, as well as any variations thereof, are intended to cover non-exclusive inclusion, for example, including a series of steps or units The processes, methods, apparatus, products or devices are not necessarily limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to such processes, methods, products or devices.

Unless otherwise defined, technical or scientific terms used in the present invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which the present invention belongs. The terms "first," "second," and similar terms used herein do not denote any order, quantity, or importance, but are merely used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. Words like "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right", etc. are only used to indicate the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly. In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and well-known components are omitted from the present invention.

Example

As shown in Figures 1-7, this embodiment provides a pneumatic combination valve for an oxygen generator, including a pilot solenoid valve 1 for controlling the gas circuit switch, a cover plate 2 fixedly arranged under the pilot solenoid valve, and a cover plate 2 fixedly arranged on The valve body 6 under the cover plate 2 and the two sets of push rod assemblies installed inside the valve body 6. Referring to FIG. 2, the front of the valve body 6 is provided with an exhaust port 3 for discharging nitrogen and an air inlet for inputting air. The air inlet 4 of the valve body 6 is also provided with A port 5 and B port 7 connected to the molecular sieve cylinder. The A port 5 includes a first air passage 51 and a second air passage 52. An air passage 51 communicates with the second air passage 52, the diameter of the first air passage 51 is larger than the diameter of the second air passage 52; the B port 7 includes a third air passage 71 and a fourth air passage 72 , the third air passage 71 communicates with the fourth air passage 72 , and the diameter of the third air passage 71 is larger than the diameter of the fourth air passage 72 . The first air passage 51 and the third air passage 71 with larger diameters form relatively large cavities in the A port 5 and the B port 7 respectively, which can have the effect of impedance silencing, thereby effectively reducing the gas switching of the pneumatic combination valve. and exhaust noise.

In order to reduce the airway resistance and make the gas flow more smoothly, in one embodiment, the first airway 51 , the second airway 52 , the third airway 71 and the fourth airway 72 are all cylindrical airways .

In one embodiment, the first air passage 51 and the second air passage 52 are integrally formed, the third air passage 71 and the fourth air passage 72 are integrally formed, and the A port formed by the integrally formed structure 5 and B port 7 have more excellent airway tightness and do not require additional sealing measures. However, the above structure has certain difficulties in terms of process processing.

Optionally, in order to reduce the processing difficulty of the structure of the A port 5 and the B port 7, in one embodiment, a front cover plate 8 is also included, and the front cover plate 8 is covered and arranged on the valve body 6 where the A port 5 is located. The side of the front cover plate 8 is provided with a second air passage 52 communicating with the first air passage 51, a fourth air passage 72 communicating with the third air passage 71, the air inlet 4 and the exhaust port 3, The air inlet 4 and the exhaust port 3 are located in the middle area of the front cover 8 along the vertical direction, and the second air passage 52 and the fourth air passage 72 are located in the front cover 8 Areas on both sides in the lateral direction.

Preferably, as shown in FIG. 2 , the exhaust port 3 and the intake port 4 are arranged in parallel along the lateral direction, and the exhaust port 3 is located above the intake port 4 ; the A port 5 is located at the top of the intake port 4 . On the left side of the exhaust port 3, the B port 7 is located on the right side of the exhaust port 3, and the A port 5 and the B port 7 are located on the same horizontal line.

In one embodiment, the valve body 6 is provided with a push rod cavity (not shown in the figure) for accommodating a push rod assembly, and the push rod assembly includes an upper seal assembly, a push rod, a lower seal assembly and a fixing device 11 , the upper sealing assembly is clamped on the upper end of the push rod, the lower sealing assembly is clamped at the lower end of the push rod, and the fixing device 11 is disposed below the lower sealing assembly.

In one embodiment, the upper sealing assembly includes an upper sealing cover whose sealing cover is arranged on the upper end of the push rod cavity and an upper diaphragm that is clamped with the pushing rod; the lower sealing assembly includes a sealing cover arranged on the pushing rod cavity. The lower sealing cover 21 at the lower end and the lower diaphragm 22 clamped with the push rod; the fixing device 11 is a snap spring.

In one embodiment, a first vent hole is opened in the central area of the upper sealing cover, and a sealing ring (not shown in the figure) is provided on the outer periphery of the first vent hole.

The working principle of the pneumatic combined valve for an oxygen generator provided by this embodiment is as follows:

The compressed air enters the valve body 6 from the air inlet 4, and enters the cover plate 2 and the pilot solenoid valve 1 through the gas passage (not shown in the figure) in the valve body 6: if the pilot solenoid valve 1 is energized to the left, the compressed air will be compressed. The air enters the air passage in the cover plate 2 through the left position of the pilot solenoid valve 1, and then acts on the left upper diaphragm 921 through the left first vent hole 931 of the left upper sealing cover 911, and pushes the left push rod 101 downward Move, at this time, the B port 7 is opened, and the compressed air enters the left molecular sieve cylinder (not shown in the figure) through the B port 7, and at the same time, the compressed nitrogen in the right molecular sieve cylinder (not shown in the figure) enters from the A port 5 Valve body 6, compressed nitrogen is discharged from the exhaust port 3 through the gas channel in the valve body 6; if the pilot solenoid valve 1 is energized at the right position, the compressed air enters the gas channel in the cover plate 2 through the right position of the pilot solenoid valve 1, and then The right second vent hole 932 of the right upper sealing cover 912 acts on the right upper diaphragm 922 and pushes the right push rod 102 to move downward. At this time, the A port 5 is opened, and the compressed air enters the right side through the A port 5 At the same time, the compressed nitrogen in the molecular sieve cylinder on the left side enters the valve body 6 from the B port 7, and enters the exhaust port 3 through the pneumatic channel in the valve body 6 to discharge the nitrogen gas.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (9)

1. The pneumatic combination valve for the oxygen generator is characterized by comprising a pilot electromagnetic valve for controlling a gas circuit switch, a cover plate fixedly arranged below the pilot electromagnetic valve, a valve body fixedly arranged below the cover plate and a push rod assembly arranged in the valve body, wherein the side surface of the valve body is provided with a gas inlet for inputting air, a gas outlet for discharging nitrogen, an A port communicated with a molecular sieve cylinder and a B port communicated with the molecular sieve cylinder, the gas inlet, the gas outlet, the A port and the B port are positioned on the same side surface of the valve body, the A port comprises a first gas passage and a second gas passage, the first gas passage is communicated with the second gas passage, and the diameter of the first gas passage is larger than that of the second gas passage; the port B comprises a third air passage and a fourth air passage, the third air passage is communicated with the fourth air passage, and the diameter of the third air passage is larger than that of the fourth air passage.

2. The pneumatic combination valve for an oxygen generator as set forth in claim 1, wherein the first, second, third and fourth gas passages are all cylindrical gas passages.

3. The pneumatic combination valve for an oxygen generator as set forth in claim 2, wherein the first and second gas passages are of one-piece construction, and the third and fourth gas passages are of one-piece construction.

4. The pneumatic combination valve for the oxygen generator as recited in claim 2, further comprising a front cover plate, wherein the front cover plate covers the side surface where the opening a of the valve body is located, the front cover plate is provided with a second air passage communicated with the first air passage, a fourth air passage communicated with the third air passage, an air inlet and an air outlet, the air inlet and the air outlet are located in a middle area of the front cover plate along the vertical direction, and the second air passage and the fourth air passage are located in two side areas of the front cover plate along the transverse direction.

5. The valve of claim 4, wherein the exhaust port and the inlet port are arranged in parallel in a transverse direction, the exhaust port being located above the inlet port; the port A is positioned on one side of the exhaust port, the port B is positioned on the other side of the exhaust port, and the port A and the port B are positioned on the same horizontal line.

6. The pneumatic combination valve for the oxygen generator as recited in claim 1, wherein a push rod cavity for accommodating the push rod assembly is formed inside the valve body, the push rod assembly comprises an upper sealing assembly, a push rod, a lower sealing assembly and a fixing device, the upper sealing assembly is clamped at an upper end of the push rod, the lower sealing assembly is clamped at a lower end of the push rod, and the fixing device is arranged below the lower sealing assembly.

7. The pneumatic combination valve for the oxygen generator as recited in claim 6, wherein the upper sealing assembly comprises an upper sealing cover arranged at the upper end of the push rod cavity and an upper membrane clamped with the push rod; the lower sealing assembly comprises a lower sealing cover and a lower membrane, wherein the sealing cover is arranged at the lower end of the push rod cavity; the fixing device is a clamp spring.

8. The pneumatic combination valve for an oxygen generator as recited in claim 7, wherein a first vent hole is formed in a central region of the upper sealing cover, and a first sealing ring is disposed on an outer periphery of the first vent hole.

9. The pneumatic combination valve for an oxygenerator of claim 6, wherein the number of pushrod cavities is 2 and the number of pushrod assemblies is 2.

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