Pilot gas source switching device and oxygen production equipment

Abstract

The utility model discloses a pilot air source switching device and oxygen generating equipment, the pilot air source switching device comprises a communicating pipe, a first air taking pipe, a second air taking pipe and a limiting assembly, the limiting assembly is used for connecting a control valve, the two ends of the first air taking pipe are respectively communicated with an air outlet of an air compressor and the communicating pipe; the two ends of the second air taking pipe communicate with the air outlet end of the drying machine and the communicating pipe correspondingly, and the limiting assembly is arranged on the first air taking pipe and used for limiting the first air taking pipe to supply air to the communicating pipe after the second air taking pipe supplies air to the communicating pipe. According to the pilot gas source switching device and the oxygen generation equipment, pilot gas can be rapidly and stably provided for control valves on a suction dryer and an oxygen generator, the cleanliness of the provided pilot gas is high, and the control valves are not prone to being damaged.

Description

Technical Field

[0001] This utility model relates to the field of oxygen production equipment technology, and in particular to a pilot gas source switching device and an oxygen production equipment. Background Technology

[0002] Pilot air, as the power source for the switching action of some pilot-operated control valves, is a crucial component of the control air circuit. In the oxygen production industry, air generated by an air compressor is processed by a desiccant dryer before being supplied to the oxygen generator. The pilot air required by the control valves on the oxygen generator is generally taken from the outlet of the desiccant dryer. While this method ensures high cleanliness of the pilot air after desiccant dryer processing, it has been found that some desiccant dryers have normally closed inlet valves controlled by a control valve. These valves require pilot air to open, but since the pilot air is taken from the outlet of the desiccant dryer, a situation arises where pilot air cannot be provided, resulting in a lack of usable air. Current technology typically addresses this by directly setting an air intake point at the outlet of the air compressor. However, this method results in pilot air containing significant amounts of oil, water, and dust, which can damage the control valves over time. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a pilot gas source switching device, which can not only quickly and stably provide pilot gas to the control valves of the desiccant and oxygen concentrator, but also provides pilot gas with high cleanliness, making it less likely to damage the control valves.

[0004] This utility model also proposes an oxygen generating device having the above-mentioned pilot gas source switching device.

[0005] According to a first aspect of the present invention, a pilot gas source switching device is used in an oxygen generating device. The oxygen generating device includes an air compressor, a desiccant dryer, and an oxygen generator. The desiccant dryer is provided with an inlet valve connected to the outlet of the air compressor. The oxygen generator is connected to the outlet of the desiccant dryer. Both the oxygen generator and the desiccant dryer are provided with control valves. The control valve on the desiccant dryer is used to control the opening and closing of the inlet valve. The pilot gas source switching device includes a connecting pipe, a first gas intake pipe, a second gas intake pipe, and a limiting component for connecting the control valves. The two ends of the first gas intake pipe are respectively connected to the outlet of the air compressor and the connecting pipe. The two ends of the second gas intake pipe are respectively connected to the outlet of the desiccant dryer and the connecting pipe. The limiting component is provided on the first gas intake pipe to limit the supply of gas from the first gas intake pipe to the connecting pipe after the second gas intake pipe supplies gas to the connecting pipe.

[0006] The pilot gas source switching device according to the embodiments of the present utility model has at least the following beneficial effects:

[0007] In this invention, when the air compressor is started, it delivers air to the intake valve of the desiccant. At this time, the intake valve of the desiccant is closed. The air generated by the air compressor enters the connecting pipe through the first air intake pipe, and then enters the control valves of the desiccant and oxygen generator to drive the corresponding control valves. The control valve on the desiccant controls the intake valve to open, and the air generated by the air compressor can enter the desiccant for processing. After the processed air is discharged from the outlet of the desiccant, most of it enters the oxygen generator to produce oxygen, and a small amount enters the connecting pipe through the second air intake pipe, and then enters the control valves of the desiccant and oxygen generator to drive the corresponding control valves. At the same time, the limiting component restricts the supply of air from the first air intake pipe to the connecting pipe, thereby realizing the switching of the pilot air source. In this way, pilot gas can be quickly and stably supplied to the control valves of the desiccant and oxygen concentrator. Moreover, only a small amount of pilot gas enters the connecting pipe and the control valve from the first gas intake pipe. After switching the pilot gas source, all subsequent pilot gas is processed by the desiccant before entering the connecting pipe and the control valve from the second gas intake pipe. The subsequent pilot gas has a high degree of cleanliness and is less likely to damage the control valve.

[0008] According to some embodiments of the present invention, the limiting component includes a first pressure regulating valve and a first one-way valve. The first pressure regulating valve is disposed in the first air intake pipe, and the first one-way valve is disposed in the first air intake pipe and located between the first pressure regulating valve and the connecting pipe.

[0009] According to some embodiments of the present invention, the second air intake pipe is provided with a second one-way valve.

[0010] According to some embodiments of this utility model, the connecting pipe is provided with a second pressure regulating valve.

[0011] According to some embodiments of the present invention, the connecting pipe is provided with an air filter.

[0012] According to some embodiments of the present invention, the connecting pipe is equipped with an oil mist lubricator.

[0013] According to some embodiments of the present invention, the second pressure regulating valve, the air filter, and the oil mist lubricator are assembled together to form an air source triplet.

[0014] According to some embodiments of the present invention, a first connecting pipe is provided between the air inlet valve of the desiccant and the air outlet of the air compressor, and the first air intake pipe is connected to the first connecting pipe.

[0015] According to some embodiments of the present invention, a second connecting pipe is provided between the oxygen generator and the air outlet of the desiccant, and the second air intake pipe is connected to the second connecting pipe.

[0016] The oxygen generating equipment according to a second aspect embodiment of the present invention includes the pilot gas source switching device described in the first aspect embodiment above.

[0017] The oxygen generating device according to the embodiments of this utility model has at least the following beneficial effects:

[0018] The pilot gas source switching device of the first aspect of this utility model can not only provide pilot gas quickly and stably to the control valves of the desiccant and oxygen concentrator, but also ensure that only a small amount of pilot gas enters the connecting pipe and the control valve from the first gas intake pipe. After switching the pilot gas source, all subsequent pilot gas is processed by the desiccant before entering the connecting pipe and the control valve from the second gas intake pipe. The subsequent pilot gas has a high cleanliness and is less likely to damage the control valve.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and some of these additional aspects and advantages will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of pilot gas being drawn from the outlet of the desiccant in the prior art.

[0022] Figure 2 This is a schematic diagram of pilot air being drawn from the outlet of an air compressor in the prior art;

[0023] Figure 3 This is a schematic diagram of the oxygen generation equipment of this utility model.

[0024] Icon labels:

[0025] Connecting pipe 100;

[0026] First air intake tube 200;

[0027] Second air intake tube 300;

[0028] Limiting component 400; first pressure regulating valve 401; first check valve 402;

[0029] Second check valve 500;

[0030] Air supply triplet 600; second pressure regulating valve 601; air filter 602; oil mist lubricator 603;

[0031] Air compressor 700; First connecting pipe 701;

[0032] Desiccant dryer 800; Second connecting pipe 801;

[0033] Oxygen concentrator 900;

[0034] Gas supply pipe 1000. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0038] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0039] Pilot air, as the power source for switching actions in some pilot-operated control valves, is an important component of the control air circuit. (Reference) Figure 1 and Figure 2As shown, in the oxygen production industry, the air generated by the air compressor 700 is processed by the desiccant 800 and then supplied to the oxygen generator 900 for oxygen production. The oxygen generator 900 is equipped with several control valves, which control the opening and closing of the corresponding valves on the oxygen generator 900. The pilot air required by the control valves on the oxygen generator 900 is generally taken from the outlet of the desiccant 800 through the air supply pipe 1000. After the pilot air is processed by the desiccant 800, the oil content, water content and dust content are greatly reduced, resulting in a high degree of cleanliness. In addition, the air dew point is also lowered, and a very low temperature is required for it to freeze after entering the control valve. However, during use, it was found that the air inlet valve of some desiccant dryers 800 is a normally closed valve, and it is also equipped with a corresponding control valve (such as a pilot-operated solenoid valve) to control its opening and closing. In this case, pilot air needs to be supplied to the control valve before the air inlet valve can be opened. However, the pilot air is taken from the air outlet of the desiccant dryer 800. At the same time, the air inlet valve is not open, and no air enters the desiccant dryer 800. As a result, the air outlet of the desiccant dryer 800 cannot provide pilot air, resulting in a situation where no air is available.

[0040] In existing technology, the common method is to directly draw air from the outlet of the air compressor 700 through the air supply pipe 1000. However, this method results in the pilot air containing a large amount of oil, water, and dust, which can damage the control valve over long-term use. Specifically, the following problems may occur: 1. The control valve will be in a relatively humid environment for a long time, and the moisture in the air will cause the valve body to rust; 2. The control valve will be in an environment with high oil content for a long time, which will accelerate the aging of the rubber and affect the sealing performance; 3. When the control valve is in a low-temperature environment, moisture will freeze inside the valve body, affecting its normal operation and greatly reducing its reliability.

[0041] To address the aforementioned problems, this invention proposes a pilot gas source switching device and an oxygen generation equipment.

[0042] The following is for reference. Figure 3 This invention describes a pilot gas source switching device and an oxygen generating device according to embodiments of the present invention.

[0043] like Figure 3 As shown, the pilot gas source switching device according to the first aspect of the present invention is used in an oxygen generating device. The oxygen generating device includes an air compressor 700, a desiccant dryer 800, and an oxygen generator 900. The desiccant dryer 800 is provided with an air inlet end and an air outlet end. The air inlet end is provided with an air inlet valve. The air compressor 700 is provided with an air outlet. The oxygen generator 900 is provided with an air inlet end. The air inlet valve of the desiccant dryer 800 is connected to the air outlet of the air compressor 700. The air inlet of the oxygen generator 900 is connected to the air outlet end of the desiccant dryer 800. Both the oxygen generator 900 and the desiccant dryer 800 are provided with control valves. The control valve on the oxygen generator 900 is used to open and close the corresponding valve on the oxygen generator 900. The control valve on the desiccant dryer 800 is used to control the opening and closing of the air inlet valve.

[0044] The pilot gas source switching device includes a connecting pipe 100, a first gas intake pipe 200, a second gas intake pipe 300, and a limiting component 400. The connecting pipe 100 connects to the control valves on the oxygen concentrator 900 and the desiccant 800 to supply pilot gas to these valves. The first gas intake pipe 200 connects to the outlet of the air compressor 700 and the connecting pipe 100 at both ends, and the second gas intake pipe 300 connects to the outlet of the desiccant 800 and the connecting pipe 100 at both ends. The limiting component 400 is located on the first gas intake pipe 200 to limit the gas supply from the first gas intake pipe 200 to the connecting pipe 100 after the second gas intake pipe 300 supplies gas to it.

[0045] In this invention, when the air compressor 700 is started, it delivers air to the intake valve of the desiccant 800. At this time, the intake valve of the desiccant 800 is closed. The air generated by the air compressor 700 enters the connecting pipe 100 through the first air intake pipe 200, and then enters the control valves of the desiccant 800 and the oxygen generator 900 to drive the corresponding control valves. The control valve on the desiccant 800 controls the intake valve to open, so the air generated by the air compressor 700 can enter the desiccant 800 for processing. After the processed air is discharged from the outlet of the desiccant 800, most of it enters the oxygen generator 900 to produce oxygen, and a small amount enters the connecting pipe 100 through the second air intake pipe 300. Then it enters the control valves of the desiccant 800 and drives the corresponding control valves. At the same time, the limiting component 400 works to limit the supply of air from the first air intake pipe 200 to the connecting pipe 100, thus realizing the switching of the pilot air source.

[0046] In this way, pilot gas can be quickly and stably supplied to the control valves of the desiccant 800 and oxygen concentrator 900. Moreover, only a small amount of pilot gas enters the connecting pipe 100 from the first gas intake pipe 200 and then enters the control valve. After switching the pilot gas source, all subsequent pilot gas is processed by the desiccant 800 before entering the connecting pipe 100 from the second gas intake pipe 300 and then entering the control valve. The subsequent pilot gas has a high degree of cleanliness and is less likely to damage the control valve.

[0047] In some embodiments of this utility model, such as Figure 3As shown, the limiting component 400 includes a first pressure regulating valve 401 and a first check valve 402. The first pressure regulating valve 401 is located in the first air intake pipe 200, and the first check valve 402 is located in the first air intake pipe 200 and between the first pressure regulating valve 401 and the connecting pipe 100. After the pilot gas enters the first intake pipe 200, it is first depressurized by the first pressure regulating valve 401, and then enters the connecting pipe 100 through the first one-way valve 402. When the air inlet valve of the desiccant 800 is opened, and the second intake pipe 300 supplies pilot gas to the connecting pipe 100, the pilot gas in the first intake pipe 200 has been depressurized by the first pressure regulating valve 401. As a result, the air pressure at the end of the first one-way valve 402 that is far from the connecting pipe 100 is less than the air pressure at the end of the first one-way valve 402 that is far from the connecting pipe 100. Thus, the pilot gas in the first intake pipe 200 can no longer push open the first one-way valve 402, so that the subsequent pilot gas can only enter the connecting pipe 100 from the second intake pipe 300, thereby realizing the switching of the pilot gas source.

[0048] In this embodiment, the limiting component 400 can automatically and quickly switch the pilot gas source after the second gas intake pipe 300 is filled with air. Compared with manually opening and closing the first gas intake pipe 200, the automation level is higher and the switching response speed is faster. In addition, compared with setting a pressure sensor and solenoid valve to control the opening and closing of the first gas intake pipe 200, the structure is simpler. Furthermore, the pilot gas in the first gas intake pipe 200 can be adjusted according to the gas source pressure through the first pressure regulating valve 401 to suit different gas source pressures, thus improving its practicality.

[0049] It should be noted that in some other embodiments of this utility model, the limiting component 400 can also be other suitable structures, such as a shut-off valve. When air enters the second air intake pipe 300, the first air intake pipe 200 can be directly disconnected by controlling the shut-off valve.

[0050] In some embodiments of this utility model, such as Figure 3 As shown, the second air intake pipe 300 is equipped with a second one-way valve 500. In this embodiment, the second one-way valve 500 is provided to prevent the pilot air entering the connecting pipe 100 from flowing back to the air outlet of the desiccant 800 through the second air intake pipe 300, thus improving the pilot air supply effect.

[0051] In some embodiments of this utility model, such as Figure 3 As shown, the connecting pipe 100 is equipped with a second pressure regulating valve 601. In this embodiment, the second pressure regulating valve 601 is provided so that when the first air intake pipe 200 and the second air intake pipe 300 supply pilot air into the connecting pipe 100, the second pressure regulating valve 601 can regulate the air pressure of the pilot air so that the air pressure of the pilot air entering the control valve is within a suitable range, avoiding the pilot air pressure from being too high or too low and affecting the operation of the control valve.

[0052] In some embodiments of this utility model, such as Figure 3 As shown, the connecting pipe 100 is equipped with an air filter 602. In this embodiment, the connecting pipe 100 is equipped with an air filter 602. When the pilot air enters from the first air intake pipe 200, the air filter can perform a certain degree of filtration to prevent the pilot air from being damaged by too much dust and moisture when it enters the control valve. When the pilot air enters from the second air intake pipe 300, the air filter can perform further filtration to prevent the pilot air from being damaged by too much dust and moisture when it enters the control valve.

[0053] In some embodiments of this utility model, such as Figure 3 As shown, the connecting pipe 100 is equipped with an oil mist lubricator 603. In this embodiment, the connecting pipe 100 is equipped with an oil mist lubricator 603. When the pilot gas enters from the first gas intake pipe 200, the oil mist in the pilot gas can be treated to a certain extent to prevent the pilot gas from containing too much oil mist and damaging the control valve when it enters the control valve. When the pilot gas enters from the second gas intake pipe 300, the oil mist in the pilot gas can be further treated to prevent the pilot gas from containing too much oil mist and damaging the control valve when it enters the control valve.

[0054] In some embodiments of this utility model, such as Figure 3 As shown, the second pressure regulating valve 601, air filter 602, and oil mist lubricator 603 are assembled together to form an air source triplet 600. In this embodiment, the air source triplet 600 is directly installed on the connecting pipe 100. The air source triplet 600 includes the second pressure regulating valve 601, air filter 602, and oil mist lubricator 603, thus eliminating the need to install the second pressure regulating valve 601, air filter 602, and oil mist lubricator 603 separately, making installation more convenient.

[0055] It should be noted that in some other embodiments of this utility model, the second pressure regulating valve 601, the air filter 602, and the oil mist lubricator 603 can also be installed and configured separately.

[0056] In some embodiments of this utility model, such as Figure 3 As shown, a first connecting pipe 701 is provided between the air inlet valve of the desiccant 800 and the air outlet of the air compressor 700, and a first air intake pipe 200 is connected to the first connecting pipe 701. In this embodiment, this arrangement makes connecting the first connecting pipe 701 more convenient.

[0057] It should be noted that in some other embodiments of this utility model, a three-way connector may be provided at the air outlet of the air compressor 700, and the first air intake pipe 200 and the first connecting pipe 701 may be connected to the three-way connector respectively.

[0058] In some embodiments of this utility model, such as Figure 3 As shown, a second connecting pipe 801 is provided between the air outlet of the oxygen concentrator 900 and the desiccant 800, and the second air intake pipe 300 is connected to the second connecting pipe 801. In this embodiment, this arrangement makes connecting the second connecting pipe 801 more convenient.

[0059] It should be noted that in some other embodiments of this utility model, a three-way connector may be provided at the air outlet of the desiccant 800, and the second air intake pipe 300 and the second connecting pipe 801 may be connected to the three-way connector respectively.

[0060] The oxygen generating equipment according to a second aspect of the present invention includes the pilot gas source switching device described in the first aspect of the present invention.

[0061] According to the oxygen generating equipment of the present invention, by adopting the pilot gas source switching device of the first aspect of the present invention, it can not only quickly and stably provide pilot gas to the control valves on the desiccant 800 and the oxygen generator 900, but also only a small amount of pilot gas enters the connecting pipe 100 from the first gas intake pipe 200 and then enters the control valve. After switching the pilot gas source, all subsequent pilot gas is processed by the desiccant 800 before entering the connecting pipe 100 from the second gas intake pipe 300 and then entering the control valve. The subsequent pilot gas has a high cleanliness and is not easy to damage the control valve.

[0062] It should be noted that since the oxygen generating equipment can adopt all the technical solutions of the pilot gas source switching device of the first aspect embodiment, it has at least all the beneficial effects brought about by the technical solutions of the first aspect embodiment. These additional beneficial effects will not be elaborated here.

[0063] It is understood that the oxygen generating equipment may also include an air compressor 700, a desiccant 800, and an oxygen generator 900, etc. In addition, other components and operations of the oxygen generating equipment according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0064] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A pilot gas source switching device for an oxygen generating device, the oxygen generating device comprising an air compressor, a suction dryer, and an oxygen generator, the suction dryer being provided with an air inlet valve connected to an air outlet of the air compressor, the oxygen generator being connected to an air outlet end of the suction dryer, the oxygen generator and the suction dryer each being provided with a control valve, the control valve on the suction dryer being used to control opening and closing of the air inlet valve, characterized in that, The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device.

2. The pilot gas source switching device of claim 1, wherein The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device.

3. The pilot gas source switching device of claim 1, wherein The application relates to a pilot gas source switching device.

4. The pilot gas source switching device of claim 1, wherein The application relates to a pilot gas source switching device.

5. The pilot gas source switching device of claim 4, wherein The application relates to a pilot gas source switching device.

6. The pilot gas source switching device of claim 5, wherein The application relates to a pilot gas source switching device.

7. The pilot gas source switching device of claim 6, wherein The application relates to a pilot gas source switching device.

8. The pilot gas source switching device of claim 1, wherein, The application relates to a pilot gas source switching device.

9. The pilot gas source switching device of claim 1, wherein, The application relates to a pilot gas source switching device.

10. An oxygen generating apparatus, characterized by comprising: The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to a pilot gas source switching device. The application relates to

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