CN215489106U - Undisturbed switching device for gas booster - Google Patents
Undisturbed switching device for gas booster Download PDFInfo
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- CN215489106U CN215489106U CN202120416317.9U CN202120416317U CN215489106U CN 215489106 U CN215489106 U CN 215489106U CN 202120416317 U CN202120416317 U CN 202120416317U CN 215489106 U CN215489106 U CN 215489106U
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Abstract
The utility model relates to a undisturbed switching device of a gas booster, which comprises a first booster, a second booster, a first inlet valve, a second inlet valve, a first outlet valve, a second outlet valve, an acid mist controller valve and an incinerator valve, wherein the first booster is connected with the first inlet valve; the first supercharger and the second supercharger are connected with an air inlet pipe and an air supply pipe respectively, the air inlet pipe and the air supply pipe of the first supercharger and the second supercharger are respectively provided with an inlet valve and an outlet valve, the air supply pipes of the first supercharger and the second supercharger are respectively communicated with the acid mist controller and the incinerator through a main air supply pipe, the air inlet ends of the acid mist controller and the incinerator are respectively provided with an acid mist controller valve and an incinerator valve, the main air supply pipe is also provided with a return pipe, the return pipe is provided with a pressure tester and an overpressure automatic regulating valve, and the first supercharger, the second supercharger, the pressure tester and the overpressure automatic regulating valve are all controlled by DCS.
Description
Technical Field
The utility model relates to a gas booster, in particular to an undisturbed switching device of the gas booster.
Background
The method is applied to coke oven gas in industrial production, and the coke oven gas is pressurized firstly when being used and then is introduced into production equipment due to the fact that production equipment or production scale usually involved in industrial production is relatively large, so that corresponding pressurizing equipment is required when the coke oven gas is pressurized.
The above scheme has the defects that: in the switching process of the superchargers, because the pressure difference between the inside of the standby supercharger and the equipment pipeline can cause the coke oven gas in the equipment pipeline to flow into the standby supercharger, the internal pressure of the original equipment in production is unbalanced, and further safety accidents are caused, so that the safety of the production process cannot be guaranteed, and improvement is needed.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a undisturbed switching device for a gas booster, which can better keep the stability of air pressure in an original working system when different boosters are switched, and has the characteristics of safe and reliable operation, low operation danger and the like.
The technical purpose of the utility model is realized by the following technical scheme: a gas booster undisturbed switching device comprises a first booster, a second booster, a first inlet valve, a second inlet valve, a first outlet valve, a second outlet valve, an acid mist controller valve and an incinerator valve; the air inlet of the first supercharger is connected with a first air inlet pipe, a first inlet valve is arranged on the first air inlet pipe, the air inlet of the second supercharger is connected with a second air inlet pipe, a second inlet valve is arranged in the second air inlet pipe, a first air supply pipe is connected to the air outlet of the first supercharger, a first outlet valve is arranged on the first air supply pipe, a second air supply pipe is connected to the air outlet of the second supercharger, a second outlet valve is arranged on the second air supply pipe, one end of the first air supply pipe is communicated with a third air supply pipe, the second air supply pipe is communicated with the third air supply pipe, one end of the third air supply pipe is communicated with a fourth air supply pipe and a fifth air supply pipe, the fourth air supply pipe is connected with an acid mist controller, the fourth air supply pipe is provided with an acid mist controller valve, the fifth air supply pipe is connected with an incinerator, and an incinerator air supply valve is arranged on the fifth air supply pipe, the third air supply pipe is communicated with a return pipe, the return pipe is arranged at the air inlet end of the acid mist controller valve, an overpressure automatic adjusting valve is arranged on the return pipe, a first pressure detector is arranged between the air supply pipe and the overpressure automatic adjusting valve, and the first supercharger, the second supercharger, the overpressure automatic adjusting valve and the first pressure detector are all in signal connection with the DCS.
In one embodiment, a first check valve for preventing gas from flowing backwards is arranged between the first outlet valve and the first supercharger; when the second supercharger is switched to the first supercharger, the first check valve can prevent coke oven gas in the device from flowing backwards into the first supercharger, and avoid the phenomenon that the acid mist controller is stopped and the gas pipeline of the incinerator is tempered due to large fluctuation of air pressure in the original working system.
In one embodiment, a first bypass pipe is communicated with the first air supply pipe, one end of the first bypass pipe is connected between the first outlet valve and the first check valve, and the other end of the first bypass pipe is communicated with the third air supply pipe; when the second supercharger is switched to the first supercharger, the coke oven gas flows back to the first supercharger when the first outlet valve is opened, and in order to prevent the coke oven gas flowing back from affecting the starting of the first supercharger, the first bypass pipe can guide the coke oven gas flowing back to the first supercharger back to the third gas supply pipe.
In one embodiment, a first solenoid valve is arranged on the first bypass pipe; after the operation of switching from the second booster to the first booster is finished, the first bypass pipe is closed through the first electromagnetic valve, and the first bypass pipe is prevented from forming a shunt for the first gas supply pipe so as to avoid influencing the flow rate of the coke oven gas.
In one embodiment, a second check valve for preventing gas from flowing backwards is arranged between the second outlet valve and the second supercharger; when the first supercharger is switched to the second supercharger, the second check valve can prevent coke oven gas in the device from flowing backwards into the second supercharger, and the large fluctuation of the air pressure in the original working system is avoided, so that the acid mist controller is stopped and the gas pipeline of the incinerator is tempered.
In one embodiment, a second bypass pipe is communicated with the second air supply pipe, one end of the second bypass pipe is connected between the second outlet valve and the second check valve, and the other end of the second bypass pipe is communicated with the third air supply pipe; when the first supercharger is switched to the second supercharger, the coke oven gas flows back to the second supercharger when the second outlet valve is opened, and in order to prevent the coke oven gas flowing back from influencing the starting of the second supercharger, the second bypass pipe can guide the coke oven gas flowing back to the second supercharger back to the third gas supply pipe.
In one embodiment, a second electromagnetic valve is arranged on the second bypass pipe; after the operation of switching from the first supercharger to the second supercharger is finished, the second bypass pipe is closed through the second electromagnetic valve, and the phenomenon that the second bypass pipe divides the flow of the second gas supply pipe to influence the flow rate of the coke oven gas is avoided.
In one embodiment, the first outlet valve, the second outlet valve, the first solenoid valve and the second solenoid valve are all connected with DCS signals; DCS respectively controls the opening and closing of the first outlet valve, the second outlet valve, the first electromagnetic valve and the second electromagnetic valve automatically, so that manpower is liberated, and cost is reduced.
In conclusion, the utility model has the following beneficial effects: the utility model can realize the stable switching between the two gas superchargers, prevent the air pressure in the original working system from generating large fluctuation in the switching process, effectively prevent the acid mist controller from jumping and stopping and the gas pipeline of the incinerator from tempering, and improve the safety of the device in the operation process.
Drawings
FIG. 1 is a schematic of the present invention.
In the figure: 1-a first supercharger; 2-a second supercharger; 3-a first inlet valve; 4-a second inlet valve; 5-a first outlet valve; 6-a second outlet valve; 7-acid mist controller valve; 8-incinerator valve; 91-a first inlet duct; 92-a second intake pipe; 101-a first air feed pipe; 102-a second air delivery pipe; 103-a third air feed pipe; 104-a fourth air feed pipe; 105-a fifth air feed pipe; 11-a return pipe; 12-overpressure self-regulating valve; 13-a first pressure detector; 14-a first check valve; 15-a second check valve; 16-a first bypass pipe; 17-a second bypass pipe; 18-a first solenoid valve; 19-a second solenoid valve; 20-an acid mist controller; 21-incinerator.
Detailed Description
The utility model is described in detail below with reference to the figures and examples.
It should be noted that all the directional terms such as "upper" and "lower" referred to herein are used with respect to the view of the drawings, and are only for convenience of description, and should not be construed as limiting the technical solution.
The first embodiment is as follows: referring to fig. 1, a undisturbed switching device for a gas booster includes: a first supercharger 1, a second supercharger 2, a first inlet valve 3, a second inlet valve 4, a first outlet valve 5, a second outlet valve 6, an acid mist controller valve 7, and an incinerator valve 8; the air inlet of the first supercharger 1 is connected with a first air inlet pipe 91, the first air inlet pipe 91 is provided with a first inlet valve 3, the air inlet of the second supercharger 2 is connected with a second air inlet pipe 92, the second air inlet pipe 92 is provided with a second inlet valve 4, the air outlet of the first supercharger 1 is connected with a first air supply pipe 101, the first air supply pipe 101 is provided with a first outlet valve 5, the air outlet of the second supercharger 2 is connected with a second air supply pipe 102, the second air supply pipe 102 is provided with a second outlet valve 6, one end of the first air supply pipe 101 is communicated with a third air supply pipe 103, the second air supply pipe 102 is communicated with the third air supply pipe 103, one end of the third air supply pipe 103 is communicated with a fourth air supply pipe 104 and a fifth air supply pipe 105, the fourth air supply pipe 104 is connected with an acid mist controller 20, the fourth air supply pipe 104 is provided with an acid mist controller valve 7, fifth air feed pipe 105 is connected with incinerator 21, be equipped with incinerator valve 8 on the fifth air feed pipe 105, the intercommunication has back flow 11 on the third air feed pipe 103, and the inlet end at acid mist controller valve 7 is established to back flow 11, be equipped with superpressure automatically regulated valve 12 on the back flow 11, be equipped with first pressure detector 13 between third air feed pipe 103 and the superpressure automatically regulated valve 12, first booster compressor 1, second booster compressor 2, superpressure automatically regulated valve 12 and first pressure detector 13 all with DCS signal connection.
In the above embodiment, in the initial state, the first supercharger 1 is a standby supercharger, the second supercharger 2 is an active supercharger, the acid mist controller valve 7 and the incinerator valve 8 are in the normally open state, at this time, the second inlet valve 4 and the second outlet valve 6 are opened, the first inlet valve 3 and the first outlet valve 5 are closed, the coke oven gas is introduced into the second supercharger 2 from the second gas inlet pipe 92, the coke oven gas is pressurized by the second supercharger 2, then passes through the second check valve 15 and the second outlet valve 6 on the second gas supply pipe 102, and then is introduced into the third gas supply pipe 103, the coke oven gas is introduced into the fourth gas supply pipe 104 and the fifth gas supply pipe 105 by the third gas supply pipe 103, the coke oven gas in the fourth gas supply pipe 104 and the fifth gas supply pipe 105 passes through the acid mist controller valve 7 and the incinerator valve 8, respectively, the coke oven gas is introduced into the acid mist controller 20 and the incinerator 21, respectively, both the first supercharger 1 and the second supercharger 2 are frequency conversion motors, the DCS automatically controls the frequency according to the set value of a pressure measuring point P1 so as to keep the pressure of P1 stable, the overpressure automatic regulating valve 12 and the P1 form linkage, when the pressure of P1 exceeds the set pressure, specifically, the pressure value is 70Kpa, the overpressure automatic regulating valve 12 automatically opens to release the pressure, and the overpressure automatic regulating valve closes after the pressure is lower than 70 Kpa;
specifically, when the device needs to be switched from the second supercharger 2 to the first supercharger 1, after the first supercharger 1 has various starting conditions, the first inlet valve 3 is opened, and the selection switches of the operation panel of the first supercharger 1 are respectively turned to the 'frequency conversion' and 'DCS setting' positions; the DCS manually gives the frequency of the first supercharger 1 by 10%, the frequency of the second supercharger 2 is not automatically adjusted, and the first supercharger 1 is started by pressing a variable frequency starting button; the DCS manually sets the frequency of the first booster 1 to 15%, slowly opens the first outlet valve 5 on site, and remotely monitors the outlet pressure P1 as a function of: if P1 falls within 1kpa, the first booster 1 outlet valve may be continuously opened on site until fully opened; if the P1 is reduced by more than 1kpa, the DCS increases the frequency of the first supercharger 1 by 5 percent until the pressure is stabilized, and then the valve of the first supercharger 1 is continuously opened until the first supercharger is fully opened; after the outlet valve of the first supercharger 1 is fully opened, the DCS increases the frequency of the first supercharger 1 by 5%/time of operation, and after the frequency is increased, attention is paid to the rising condition of P1, and the frequency can be continuously increased after the P1 is stabilized; when the frequency of the first supercharger 1 is equal to the frequency of the second supercharger 2, the first supercharger 1 is set to be automatically adjusted, namely the frequency of the first supercharger 1 is adjusted in linkage with P1; setting the second supercharger 2 as manual adjustment, manually reducing the frequency of the second supercharger 2 by DCS, descending the second supercharger at a speed of 5%/time, paying attention to the change of P1 while adjusting, reducing the frequency again after P1 is stabilized until the frequency of the second supercharger 2 is reduced to 15%, slowly closing the second outlet valve 6 on site, if the pressure of P1 is stabilized, continuing until closing is finished, if the pressure fluctuation of P1 exceeds 1kpa, stopping the operation, and continuing to close the valve after P1 is stabilized until closing is finished; and pressing a 'variable frequency stop' button of an operation panel of the second supercharger 2 on site, stopping the second supercharger 2, closing the second inlet valve 4, and reversing the machine.
Further, a first check valve 14 for preventing gas from flowing backward is provided between the first outlet valve 5 and the first supercharger 1; at this time, the second supercharger 2 is an active supercharger, the first supercharger 1 is a standby supercharger, and when the second supercharger 2 is switched to the first supercharger 1, the first check valve 14 can prevent coke oven gas in the device from flowing backward into the first supercharger 1, and further the gas pressure in the original working system from generating large fluctuation, which causes the acid mist controller 20 to jump down and the gas pipeline of the incinerator 21 to back fire, specifically, when the first outlet valve 5 is opened, since the pressure in the first supercharger 1 and the first gas supply pipe 101 is far lower than the pressure of P1 at the return pipe 11, when the first outlet valve 5 is opened, due to the pressure difference, a part of the gas in the third gas supply pipe 103 flows backward into the first gas supply pipe 101, so that the pressure P1 is instantaneously lowered, the gas pressure of the acid mist controller 7 is instantaneously lowered at the same time, the acid mist controller 7 is jumped down, and the acid mist cannot be controlled, finally, environmental protection accidents occur; when the first outlet valve 5 is opened, the pressure of P1 decreases, and the DCS system automatically increases the frequency of the second turbocharger 2; in the other extreme case, when the pressure P1 is too low, the frequency of the second booster 2 is rapidly increased greatly, the pressure P1 rises instantly and exceeds a set value, due to the hysteresis of frequency regulation, the pressure P1 exceeds 70Kpa, the automatic overpressure regulating valve 12 is opened, the automatic overpressure regulating valve 12 is closed after the pressure drops and is lower than 70Kpa, at the moment, the frequency of the second booster 2 is also reduced, the hysteresis exists between the closing action of the automatic overpressure regulating valve 12 and the pressure change of the frequency reduction action of the second booster 2, so that the pressure in the original working system fluctuates greatly, and if the pressure fluctuates and is lower than 10Kpa, the gas pipeline in the incinerator is tempered, and the potential safety hazard is high; therefore, the first check valve 14 can prevent coke oven gas from flowing backwards into the first supercharger 1, and avoid large pressure fluctuation in the original working system.
Further, a first bypass pipe 16 is communicated with the first air supply pipe 101, one end of the first bypass pipe 16 is connected between the first outlet valve 5 and the first check valve 14, and the other end is communicated with the third air supply pipe 103; in this case, the second turbocharger 2 is an active turbocharger, the first turbocharger 1 is a backup turbocharger, and when the second turbocharger 2 is switched to the first turbocharger 1, the coke oven gas flows back to the first turbocharger 1 by opening the first outlet valve 5, and the coke oven gas flowing back to the first turbocharger 1 can flow back to the third gas supply pipe 103 from the first bypass pipe 16 to prevent the coke oven gas flowing back to the first turbocharger 1 from accumulating on the outlet gas of the first check valve 14 and affecting the outflow of the coke oven gas in the first turbocharger 1, so that the coke oven gas flowing back to the first turbocharger 1 can be prevented from affecting the outflow of the coke oven gas in the first turbocharger 1.
Further, a first electromagnetic valve 18 is arranged on the first bypass pipe 16; at this time, the second supercharger 2 is an active supercharger, the first supercharger 1 is a standby supercharger, when the second supercharger 2 is switched to the first supercharger 1, the first electromagnetic valve 18 is opened when the first outlet valve 5 is opened, the coke oven gas flows back to the first supercharger 1 through the first outlet valve 5 in the process of slowly opening the first outlet valve 5, the first electromagnetic valve 18 is opened at this time, the coke oven gas can flow back to the third gas feed pipe 103 from the first bypass pipe 16, when the frequencies of the first supercharger 1 and the second supercharger 2 are equal, the frequency change is not needed, at this time, the first electromagnetic valve 18 can be closed to prevent the coke oven gas from passing through the first bypass pipe 16, and the first bypass pipe 16 is prevented from forming a shunt to the first coke oven gas feed pipe 101 to influence the flow rate of the coke oven gas.
Example two: according to the first embodiment, a second check valve 15 for preventing gas from flowing backwards is arranged between the second outlet valve 6 and the second supercharger 2; when the first supercharger 1 is an active supercharger and the second supercharger 2 is a standby supercharger and the first supercharger 1 is switched to the second supercharger 2, the second check valve 15 can prevent the coke oven gas in the device from flowing backwards into the second supercharger 2, so that the gas pressure in the original working system generates large fluctuation, the acid mist controller 20 is stopped and the gas pipeline of the incinerator 21 is tempered, the second check valve 15 can prevent the coke oven gas from flowing backwards into the second supercharger 2, and the pressure in the original working system is prevented from greatly fluctuating.
Further, a second bypass pipe 17 is communicated with the second air supply pipe 102, one end of the second bypass pipe 17 is connected between the second outlet valve 6 and the second check valve 15, and the other end is communicated with the third air supply pipe 103; when the first turbocharger 1 is an active turbocharger and the second turbocharger 2 is a backup turbocharger, and the first turbocharger 1 is switched to the second turbocharger 2, when the second outlet valve 6 is opened, the coke oven gas flows backward to the second supercharger 2, the first supercharger 1 is an active supercharger and the second supercharger 2 is a standby supercharger, and when the first supercharger 1 is switched to the second supercharger 2, when the second outlet valve 6 is opened, the coke oven gas flows back to the second supercharger 2, in order to prevent the coke oven gas flowing back to the second supercharger 2 from accumulating on the outlet of the first check valve 15 and further influencing the outflow of the coke oven gas in the second supercharger 2, therefore, the coke oven gas flowing back to the second booster 2 can flow back to the third gas feed pipe 103 from the second bypass pipe 17, and the coke oven gas flowing back to the second booster 2 is prevented from affecting the outflow of the coke oven gas in the first booster 1.
Further, a second electromagnetic valve 19 and a third pressure detector 21 are arranged on the second bypass pipe 17, and the third pressure detector 21 is arranged between the second electromagnetic valve 19 and the second check valve 15; in this case, the first supercharger 1 is an active supercharger, the second supercharger 2 is a standby supercharger, and when the first supercharger 1 is switched to the second supercharger 2, the coke oven gas flows back to the second supercharger 2 through the second outlet valve 6 while the second outlet valve 6 is slowly opened, the second electromagnetic valve 19 is opened, the coke oven gas can flow back to the third gas supply pipe 103 from the second bypass pipe 17, and when the frequency of the second supercharger 2 is equal to that of the first supercharger 1, the frequency change is not required, and at this time, the second electromagnetic valve 19 can be closed to prevent the coke oven gas from flowing through the second bypass pipe 17, thereby preventing the second bypass pipe 17 from shunting the second gas supply pipe 102 and further affecting the flow rate of the coke oven gas.
Embodiment two, a second check valve 15, a second bypass pipe 17 and a second electromagnetic valve 19 are arranged at the air outlet of the second supercharger 2, the functions of the above components are similar to the functions of the first check valve 14, the first bypass pipe 16 and the second electromagnetic valve 18 arranged at the air outlet of the first supercharger 1, and the arrangement of the second check valve 15, the second bypass pipe 17 and the second electromagnetic valve 19 arranged at the air outlet of the second supercharger 2 is to realize better switching from the first supercharger 1 to the second supercharger 2.
In the third embodiment, based on the first and second embodiments, the first outlet valve 5, the second outlet valve 6, the first solenoid valve 18 and the second solenoid valve 19 are all connected with DCS signals; when the second turbocharger 2 is an active turbocharger, the first turbocharger 1 is a standby turbocharger, and the second turbocharger 2 is switched to the first turbocharger 1, the DCS opens the first electromagnetic valve 18 while opening the first outlet valve 5, automatically closes the first electromagnetic valve 18 when the frequencies of the first turbocharger 1 and the second turbocharger 2 are equal, and automatically closes the second outlet valve 6 after the operation of switching from the second turbocharger 2 to the first turbocharger 1 is completed; when the first supercharger 1 is an active supercharger and the second supercharger 2 is a backup supercharger and the first supercharger 1 is switched to the second supercharger 2, the DCS opens the second solenoid valve 19 together with the second outlet valve 6, automatically closes the second solenoid valve 19 when the frequency of the second supercharger 2 is equal to that of the first supercharger 1, and automatically closes the first outlet valve 5 after the switching operation from the first supercharger 1 to the second supercharger 2 is completed; DCS can realize automatic control, saves manpower and improves the accuracy of control.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.
Claims (8)
1. The undisturbed switching device of the gas booster is characterized by comprising a first booster (1), a second booster (2), a first inlet valve (3), a second inlet valve (4), a first outlet valve (5), a second outlet valve (6), an acid mist controller valve (7) and an incinerator valve (8); the air inlet of the first supercharger (1) is connected with a first air inlet pipe (91), a first inlet valve (3) is arranged on the first air inlet pipe (91), the air inlet of the second supercharger (2) is connected with a second air inlet pipe (92), the second air inlet pipe (92) is provided with a second inlet valve (4), the air outlet of the first supercharger (1) is connected with a first air supply pipe (101), a first outlet valve (5) is arranged on the first air supply pipe (101), the air outlet of the second supercharger (2) is connected with a second air supply pipe (102), a second outlet valve (6) is arranged on the second air supply pipe (102), one end of the first air supply pipe (101) is communicated with a third air supply pipe (103), the second air supply pipe (102) is communicated with the third air supply pipe (103), one end of the third air supply pipe (103) is communicated with a fourth air supply pipe (104) and a fifth air supply pipe (105), fourth air supply pipe (104) are connected with acid mist controller (20), be equipped with acid mist controller valve (7) on fourth air supply pipe (104), fifth air supply pipe (105) are connected with burning furnace (21), be equipped with burning furnace valve (8) on fifth air supply pipe (105), the intercommunication has back flow (11) on third air supply pipe (103), and the inlet end at acid mist controller valve (7) is established in back flow (11), be equipped with superpressure automatically regulated valve (12) on back flow (11), be equipped with first pressure detector (13) between third air supply pipe (103) and superpressure automatically regulated valve (12), first booster compressor (1), second booster compressor (2), superpressure automatically regulated valve (12) and first pressure detector (13) all with DCS signal connection.
2. The undisturbed switching device for gas boosters according to claim 1 wherein a first check valve (14) for preventing reverse flow of gas is provided between the first outlet valve (5) and the first booster (1).
3. The undisturbed switching device for gas boosters according to claim 2 wherein a first bypass pipe (16) is connected to said first feed pipe (101), said first bypass pipe (16) being connected at one end to the first outlet valve (5) and the first check valve (14) and at the other end to the third feed pipe (103).
4. The undisturbed switching device for gas boosters according to claim 3 wherein a first solenoid valve (18) is provided on said first bypass pipe (16).
5. The undisturbed switching device for gas boosters according to any of claims 1-4, characterized in that a second non-return valve (15) for preventing gas backflow is provided between the second outlet valve (6) and the second booster (2).
6. The undisturbed switching device for gas boosters according to claim 5 wherein a second bypass pipe (17) is connected to said second feed pipe (102), said second bypass pipe (17) having one end connected between said second outlet valve (6) and said second check valve (15) and the other end connected to said third feed pipe (103).
7. The undisturbed switching device for gas boosters according to claim 6, characterized in that a second solenoid valve (19) is provided on the second bypass pipe (17).
8. The undisturbed switching device for gas boosters according to claim 7, characterized in that the first outlet valve (5), the second outlet valve (6), the first solenoid valve (18) and the second solenoid valve (19) are all connected to a DCS signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120416317.9U CN215489106U (en) | 2021-02-25 | 2021-02-25 | Undisturbed switching device for gas booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120416317.9U CN215489106U (en) | 2021-02-25 | 2021-02-25 | Undisturbed switching device for gas booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215489106U true CN215489106U (en) | 2022-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120416317.9U Active CN215489106U (en) | 2021-02-25 | 2021-02-25 | Undisturbed switching device for gas booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215489106U (en) |
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2021
- 2021-02-25 CN CN202120416317.9U patent/CN215489106U/en active Active
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