CN219912687U - Quick air supply system - Google Patents
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- CN219912687U CN219912687U CN202321198528.5U CN202321198528U CN219912687U CN 219912687 U CN219912687 U CN 219912687U CN 202321198528 U CN202321198528 U CN 202321198528U CN 219912687 U CN219912687 U CN 219912687U
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- air supply
- gas
- air
- electric explosion
- valve
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- 239000007789 gas Substances 0.000 claims abstract description 114
- 238000004880 explosion Methods 0.000 claims abstract description 70
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 57
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 27
- 230000001502 supplementing effect Effects 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a rapid gas supply system, which comprises a gas cylinder for storing high-pressure nitrogen, wherein a gas receiving port of the gas cylinder is communicated with a gas supply pipeline, and the gas supply pipeline is used for supplying gas to a specific gas using point of a special gas supply project; an electric explosion valve box is arranged at one end of the air supply pipeline, which is close to a specific air utilization point of a special air supply project; the electric explosion valve box comprises a normally closed electric explosion valve for controlling the on-off of the air supply pipeline, and the normally closed electric explosion valve is in a normally closed state of being closed by power failure; the normally closed electric explosion valve is connected with a first remote control button in a signal mode, and the first remote control button is used for controlling the normally closed electric explosion valve to be electrified or powered off. The utility model can meet the demand of quick response and quick air supply at any time of the specific air utilization point of the special air supply project.
Description
Technical Field
The utility model relates to the technical field of air supply, in particular to a rapid air supply system.
Background
Most of the existing gas supply systems are that a high-pressure gas cylinder in a gas cylinder warehouse is filled with 35MPa high-pressure nitrogen, an outlet end of the high-pressure gas cylinder is communicated with a gas supply pipeline, and a first stop valve, a gas distribution table, a second stop valve and the like are sequentially arranged on the gas supply pipeline along the flow direction of the nitrogen; when the air supply system is not in use, the air supply system is started, the valves are sequentially opened, the air distribution table works, and air which meets the requirement of using pressure is distributed to an air using place through the air supply pipeline; however, the existing air supply system has long preparation time before use and can not meet the requirement of quick response and quick air supply at any time.
Disclosure of Invention
Therefore, the utility model aims to overcome the defects that the preparation work time is long before the use of the air supply system in the prior art and the requirement of quick response and quick air supply at any time cannot be met, thereby providing the quick air supply system.
According to the utility model, a rapid air supply system is provided, which is used for special air supply engineering requiring rapid air supply response, and comprises:
the gas cylinder is used for storing high-pressure nitrogen;
the air supply pipeline is communicated with the air receiving port of the air bottle and is used for supplying air to a specific air point of a special air supply project;
the electric explosion valve box is arranged at one end of the air supply pipeline, which is close to a specific air utilization point of a special air supply project; the electric explosion valve box comprises a normally closed electric explosion valve for controlling the on-off of the air supply pipeline, and the normally closed electric explosion valve is in a normally closed state of being closed by power failure;
the first remote control button is in signal connection with the normally-closed electric explosion valve and is used for controlling the normally-closed electric explosion valve to be electrified or powered off.
The rapid air supply system provided by the utility model has at least the following technical effects: through be close to the special gas point of using of special air feed engineering on the air feed pipeline one end be equipped with the explosion valve case, and the explosion valve case is including the normal close explosion valve for this air feed system is in high pressure stand-by state for a long time (i.e. the state is used always to day), and the air feed pipeline in front of the air inlet end of explosion valve case is in the state of being full of high pressure gas for a long time, when needs provide high pressure nitrogen gas to the special gas point of using of special air feed engineering, only need open through first remote control button remote control normal close explosion valve circular telegram, just can accomplish the quick direct supply of high pressure nitrogen gas to the special gas point of using of special air feed engineering, satisfies the demand of quick response quick air feed at any time of the special gas point of using of special air feed engineering. Meanwhile, the air supply system has the advantages of simple structure, less mechanical equipment and high reliability.
Preferably, a first pressure sensor for monitoring the internal pressure of the gas cylinder is arranged on the gas cylinder, and a gas receiving port of the gas cylinder is also communicated with a gas supplementing table for supplementing high-pressure nitrogen into the gas cylinder.
Preferably, the first pressure sensor is electrically connected with a PLC controller, and the PLC controller is electrically connected with the air supplementing table and is used for controlling the air supplementing table to supplement high-pressure nitrogen into the air bottle.
Preferably, a second pressure sensor for monitoring the internal pressure of the air supply pipeline is arranged on the air supply pipeline, and the second pressure sensor is positioned on one side of the air inlet end of the electric explosion valve box.
Preferably, the air outlet end of the air supply pipeline is communicated with four air supply branches, and the four air supply branches are used for respectively supplying air to four specific air utilization points of a special air supply project; the number of the electric explosion valve boxes is equal to that of the air supply branches, and the electric explosion valve boxes are arranged on each air supply branch in a one-to-one correspondence manner; each air supply branch is provided with a manual air distribution valve for controlling the on-off of the air supply branch, and the manual air distribution valve is in a normally open state for controlling the communication of the air supply branch.
Preferably, the normally closed electric explosion valve is provided with one.
Preferably, the air supply pipeline is provided with a high-pressure pneumatic valve for controlling the on-off of the air supply pipeline, and the high-pressure pneumatic valve is positioned between the air receiving port of the air bottle and the electric explosion valve box; the high-pressure pneumatic valve has a normally open state in which power is off and an off state in which power is off.
Preferably, a second remote control button for controlling the high-pressure pneumatic valve to be powered on or powered off is connected to the high-pressure pneumatic valve in a signal mode.
Preferably, a filter is arranged on the air supply pipeline, and the filter is positioned between the air receiving port of the air cylinder and the high-pressure pneumatic valve.
Preferably, a stop valve is arranged between the gas inlet of the gas cylinder and the gas inlet end of the gas supply pipeline, and the stop valve is in a normally open state for controlling the gas supply pipeline to be communicated.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a rapid air supply system according to an embodiment of the present utility model.
Reference numerals illustrate:
1-gas cylinder, 2-gas supply pipeline, 3-specific gas utilization point, 4-gas supply branch, 5-electric explosion valve box, 6-first pressure sensor, 7-high pressure pneumatic valve, 8-filter, 9-stop valve.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, the rapid air supply system provided by the embodiment is used for a special air supply project requiring rapid air supply response, the air supply system comprises an air bottle 1 for storing high-pressure nitrogen, an air inlet of the air bottle 1 is communicated with an air supply pipeline 2, and the air supply pipeline 2 is used for supplying air to a specific air utilization point 3 of the special air supply project; an electric explosion valve box 5 is arranged at one end, close to a specific air point 3 of a special air supply project, of the air supply pipeline 2, and the electric explosion valve box 5 comprises a normally closed electric explosion valve (not shown in the figure) for controlling the on-off of the air supply pipeline 2, wherein the normally closed electric explosion valve is in a normally closed state of being closed by power failure; the normally closed electric explosion valve is connected with a first remote control button (not shown in the figure) in a signal mode, and the first remote control button is used for controlling the normally closed electric explosion valve to be powered on or powered off.
According to the air supply system of the embodiment, the electric explosion valve box 5 is arranged at one end, close to the specific air utilization point 3 of the special air supply project, of the air supply pipeline 2, and the electric explosion valve box 5 comprises the normally closed electric explosion valve, so that the air supply system of the embodiment is in a high-pressure standby state (namely, a daily standby state) for a long time, the air supply pipeline 2 in front of the air inlet end of the electric explosion valve box 5 in the daily standby state is filled with high-pressure air (the pressure of the high-pressure air is basically the same as that of the high-pressure nitrogen in the air bottle 1) for a long time, when the high-pressure nitrogen is required to be supplied to the specific air utilization point 3 of the special air supply project, the normally closed electric explosion valve is controlled to be electrified and opened by the first remote control button, and then the high-pressure nitrogen can be rapidly and directly supplied to the specific air utilization point 3 of the special air supply project, and the requirements that the high-pressure nitrogen supply is rapidly responded at any time and the air supply pressure of the specific air utilization point 3 of the special air supply project and the high-pressure nitrogen in the air bottle 1 are basically the same as that of the high-pressure nitrogen in the air bottle 1 are met. Meanwhile, compared with the prior art, the air supply system of the embodiment has the advantages of simple structure, fewer mechanical devices, no need of being provided with an air distribution table (particularly, a pressure reducing device and the like) in the middle, and high reliability. Because the normally closed electric explosion valve of the air supply system is remotely controlled to be electrified or powered off by the first remote control button, compared with the prior art, the whole air supply system is more convenient to control to switch between the air supply state or the daily standby state, and therefore the air supply system is also suitable for the specific air utilization point 3 of a special air supply project with short air supply time, small air supply total amount requirement, high response speed and high reliability requirement.
In some embodiments of the present utility model, the gas cylinder 1 is provided with a first pressure sensor 6 for monitoring the internal pressure of the gas cylinder 1, and the gas receiving port of the gas cylinder 1 is further communicated with a gas supplementing table (not shown in the figure) for supplementing high-pressure nitrogen into the gas cylinder 1. The internal pressure of the gas cylinder 1 is monitored in real time through the first pressure sensor 6, and when the internal pressure of the gas cylinder 1 is monitored to fall below a set value, high-pressure nitrogen is supplemented into the gas cylinder 1 through the air supplementing table, so that the internal pressure of the gas cylinder 1 is ensured to be always kept in a stable range. It can be understood that the gas cylinder 1 is provided with only one gas receiving port, and the gas receiving port of the gas cylinder 1 is used as a gas outlet in the process of supplying gas to the specific gas using point 3 of the special gas supply project by the gas supply system of the embodiment; when the air supplementing table supplements high-pressure nitrogen into the air bottle 1, an air receiving port of the air bottle 1 is used as an air inlet.
In order to further improve the automation degree and reliability of the air supply system, in some embodiments of the present utility model, the first pressure sensor 6 is electrically connected to a PLC controller (not shown in the figure), and the PLC controller is electrically connected to the air supply table, and when the first pressure sensor 6 detects that the internal pressure value of the air bottle 1 is lower than the set value, the PLC controller controls the air supply table to automatically supply high-pressure nitrogen into the air bottle 1, so as to ensure that the internal pressure of the air bottle 1 is always kept in a stable range.
In some embodiments of the present utility model, a second pressure sensor for monitoring the internal pressure of the air supply pipe 2 is provided on the air supply pipe 2, and the second pressure sensor is located at one side of the air inlet end of the explosion valve box 5. The internal pressure of the air supply pipeline 2 in the daily standby state is monitored through the second pressure sensor, when the internal pressure of the air supply pipeline 2 in the daily standby state is monitored to fall below a set value, the internal pressure of the air bottle 1 is judged to fall below the set value, high-pressure nitrogen is supplemented into the air bottle 1 through the air supplementing table, the first pressure sensor 6 and the second pressure sensor play a role in mutual replacement, so that when one of the pressure sensors is damaged, the internal pressure condition of the air bottle 1 can still be normally monitored, and the internal pressure of the air bottle 1 is ensured to be always kept in a stable range.
In this embodiment, the number of normally closed electric explosion valves of the electric explosion valve box 5 is not limited, and in order to improve the response speed of air supply of the air supply system on the basis of ensuring the reliability of controlling the on-off of the air supply pipeline 2, it is preferable that one normally closed electric explosion valve is provided. In a specific application, the number of the normally closed electric explosion valves of the electric explosion valve box 5 of the embodiment can be reasonably increased or decreased according to the size of the air supply pipeline 2 or the requirement of the air supply working condition, for example, the number of the normally closed electric explosion valves can be two, three or four.
Considering that the existing special air supply project is generally provided with four special air utilization points 3, and the four special air utilization points 3 need to be independently supplied with air, in order to realize that only one air supply system is needed to respectively and independently and quickly supply air to the four special air utilization points 3 of the special air supply project, in some embodiments of the utility model, the air outlet end of the air supply pipeline 2 is communicated with four air supply branches 4, and the four air supply branches 4 are used for respectively supplying air to the four special air utilization points 3 of the special air supply project; the number of the electric explosion valve boxes 5 is equal to that of the air supply branches 4, and the electric explosion valve boxes are arranged on each air supply branch 4 in a one-to-one correspondence mode. Because each air supply branch 4 is provided with the electric explosion valve box 5, the normally closed electric explosion valve of the electric explosion valve box 5 on the corresponding air supply branch 4 is remotely controlled to be electrified and opened through the first remote control button, so that high-pressure nitrogen can be rapidly and directly supplied to the corresponding specific air application point 3 of the special air supply project through the corresponding air supply branch 4; the air supply system of the embodiment is only needed to realize that independent and rapid air supply can be respectively carried out to four specific air utilization points 3 of a special air supply project. In a specific application, the number of the air supply branches 4 of the present utility model may be correspondingly increased or decreased according to the number of the specific air points 3 of the specific air supply project, for example, the number of the air supply branches 4 may be two, three or five.
Specifically, each air supply branch 4 is provided with a manual air distribution valve (not shown in the figure) for controlling the on-off of the air supply branch 4, and the manual air distribution valve has a normally open state for controlling the communication of the air supply branch 4. Because the manual distribution valve is in a normally open state for controlling the communication of the gas supply branch 4, the gas supply branch 4 which is in a daily standby state and is positioned in front of the gas inlet end of the electric explosion valve box 5 is filled with high-pressure nitrogen meeting the requirement of a specific gas utilization point 3 of a special gas supply project for a long time, the gas supply system of the embodiment is in a high-pressure standby state for a long time, and the high-pressure nitrogen can be quickly and directly supplied to the specific gas utilization point 3 of the special gas supply project after the normally closed electric explosion valve is remotely controlled to be electrified and opened through the first remote control button. When the air supply system of the embodiment needs to be switched to the air-off state, after the remote control normally-closed electric explosion valve is powered off and closed, the air supply branch 4 can be further disconnected by controlling the manual air distribution valve to be switched to the closed state on site, and the air supply system of the embodiment can be switched to the air-off state more reliably.
In some embodiments of the present utility model, the air supply pipeline 2 is provided with a high-pressure pneumatic valve 7 for controlling the on-off of the air supply pipeline 2, and the high-pressure pneumatic valve 7 is located between the air receiving port of the air bottle 1 and the electric explosion valve box 5; the high-pressure air-operated valve 7 has a normally open state in which it is opened by power-off and a closed state in which it is closed by power-on. The high-pressure pneumatic valve 7 is selected to be a normally open valve, so that the high-pressure pneumatic valve 7 controls the air supply pipeline 2 to be communicated under the condition of power failure, and is matched with the normally closed electric explosion valve, so that the air supply system of the embodiment is in a high-pressure standby state for a long time, the air supply pipeline 2 in front of the air inlet end of the electric explosion valve box 5 is ensured to be full of high-pressure air for a long time, and the normally closed electric explosion valve is remotely controlled to be electrified and opened only through the first remote control button, so that high-pressure nitrogen can be rapidly and directly supplied to a specific air utilization point 3 of a special air supply project, and the demand of rapid response and rapid air supply at any time of the specific air utilization point 3 of the special air supply project is met; when the air supply system of the embodiment needs to be switched to the air-off state, the high-pressure pneumatic valve 7 is powered on and closed, and the normally-closed electric explosion valve is powered off, so that the air supply system of the embodiment can be reliably and accurately switched to the air-off state.
To further facilitate controlling the switching of the air supply system of the present embodiment to the air-off state, in some embodiments of the present utility model, a second remote control button (not shown in the figure) for controlling the power on or off of the high-pressure air-operated valve 7 is signal-connected to the high-pressure air-operated valve 7. Compared with the common pneumatic valve, the high-pressure pneumatic valve 7 of the embodiment can respond more quickly, and the high-pressure pneumatic valve 7 can be quickly powered on or powered off and opened under the control of the second remote control button, so that the requirements of quick response air supply and quick response air interruption at any time of the specific air utilization point 3 of the special air supply project are met.
Considering that the high-pressure nitrogen gas inputted into the gas supply pipe 2 from the gas cylinder 1 contains impurities, the high-pressure gas entering the high-pressure gas valve 7 may damage the internal structure of the high-pressure gas valve 7 or other devices (such as a normally closed electric explosion valve) may damage the internal structure thereof, in order to avoid the above problems; in some embodiments of the utility model, a filter 8 is arranged on the gas supply pipe 2, and the filter 8 is located between the gas receiving port of the gas cylinder 1 and the high-pressure pneumatic valve 7.
In some embodiments of the present utility model, a stop valve 9 is disposed between the gas receiving port of the gas cylinder 1 and the gas inlet end of the gas supply pipe 2, and the stop valve 9 has a normally open state for controlling the gas supply pipe 2 to communicate; the stop valve 9 with the normally open state is matched with the normally closed electric explosion valve, so that the air supply system of the embodiment is in a high-pressure standby state (namely a daily standby state) for a long time, the air supply pipeline 2 in front of the air inlet end of the electric explosion valve box 5 is ensured to be filled with high-pressure air for a long time, and the high-pressure nitrogen can be quickly and directly supplied to the specific air utilization point 3 of the special air supply project only by remotely controlling the normally closed electric explosion valve to be electrified and opened through the first remote control button, so that the requirements that the specific air utilization point 3 of the special air supply project can quickly respond to quick air supply at any time and the air supply pressure is basically the same as the pressure of the high-pressure nitrogen in the air cylinder 1 are met; when the gas supply system of the present embodiment needs to be switched to a gas cutoff state or the outlet end of the gas cylinder 1 is disconnected from the gas supply pipe 2, the passage of the gas supply pipe 2 is disconnected by controlling the cutoff valve 9 to be switched to a closed state.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (10)
1. A rapid air supply system for a special air supply project requiring a rapid response to air supply, the air supply system comprising:
a gas cylinder (1) for storing high-pressure nitrogen;
the air supply pipeline (2) is communicated with the air receiving port of the air bottle (1), and the air supply pipeline (2) is used for supplying air to a specific air utilization point (3) of a special air supply project;
the electric explosion valve box (5) is arranged at one end of the air supply pipeline (2) close to a specific air utilization point (3) of a special air supply project; the electric explosion valve box (5) comprises a normally closed electric explosion valve for controlling the on-off of the air supply pipeline (2), and the normally closed electric explosion valve is in a normally closed state of being powered off;
the first remote control button is in signal connection with the normally-closed electric explosion valve and is used for controlling the normally-closed electric explosion valve to be electrified or powered off.
2. The rapid gas supply system according to claim 1, wherein the gas cylinder (1) is provided with a first pressure sensor (6) for monitoring the internal pressure of the gas cylinder (1), and the gas port of the gas cylinder (1) is also communicated with a gas supplementing table for supplementing high-pressure nitrogen into the gas cylinder (1).
3. A rapid gas supply system according to claim 2, characterized in that the first pressure sensor (6) is electrically connected with a PLC controller, which is electrically connected with the gas supplementing table and is used for controlling the gas supplementing table to supplement high-pressure nitrogen into the gas cylinder (1).
4. A quick gas supply system according to claim 2, characterized in that the gas supply conduit (2) is provided with a second pressure sensor for monitoring the internal pressure of the gas supply conduit (2), which second pressure sensor is located on the side of the gas inlet end of the electro-explosion valve box (5).
5. A rapid air supply system according to claim 1, characterized in that the air outlet end of the air supply pipeline (2) is communicated with four air supply branches (4), and the four air supply branches (4) are used for supplying air to four specific air utilization points (3) of a special air supply project respectively; the number of the electric explosion valve boxes (5) is equal to that of the air supply branches (4), and the electric explosion valve boxes are arranged on each air supply branch (4) in a one-to-one correspondence manner; each air supply branch (4) is provided with a manual air distribution valve for controlling the on-off of the air supply branch (4), and the manual air distribution valve is in a normally open state for controlling the communication of the air supply branch (4).
6. A quick gas supply system according to claim 1, wherein said normally closed electric explosion valve is provided with one.
7. A rapid gas supply system according to any one of claims 1 to 6, characterized in that a high-pressure pneumatic valve (7) for controlling the on-off of the gas supply pipeline (2) is arranged on the gas supply pipeline (2), and the high-pressure pneumatic valve (7) is positioned between a gas receiving port of the gas cylinder (1) and the electric explosion valve box (5); the high-pressure pneumatic valve (7) has a normally open state in which power is off and an off state in which power is on and off.
8. A rapid air supply system according to claim 7, characterized in that the high pressure pneumatic valve (7) is signally connected with a second remote control button controlling the energizing or de-energizing of the high pressure pneumatic valve (7).
9. A rapid gas supply system according to claim 7, characterized in that a filter (8) is arranged on the gas supply conduit (2), the filter (8) being located between the gas connection opening of the gas cylinder (1) and the high-pressure pneumatic valve (7).
10. A rapid gas supply system according to claim 1, characterized in that a shut-off valve (9) is arranged between the gas connection opening of the gas cylinder (1) and the gas inlet end of the gas supply pipe (2), the shut-off valve (9) having a normally open state controlling the communication of the gas supply pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321198528.5U CN219912687U (en) | 2023-05-17 | 2023-05-17 | Quick air supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321198528.5U CN219912687U (en) | 2023-05-17 | 2023-05-17 | Quick air supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219912687U true CN219912687U (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321198528.5U Active CN219912687U (en) | 2023-05-17 | 2023-05-17 | Quick air supply system |
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| Country | Link |
|---|---|
| CN (1) | CN219912687U (en) |
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2023
- 2023-05-17 CN CN202321198528.5U patent/CN219912687U/en active Active
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