CN110108416B - Smoke leakage detection device suitable for large-flow gas - Google Patents
Smoke leakage detection device suitable for large-flow gas Download PDFInfo
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- CN110108416B CN110108416B CN201910435847.5A CN201910435847A CN110108416B CN 110108416 B CN110108416 B CN 110108416B CN 201910435847 A CN201910435847 A CN 201910435847A CN 110108416 B CN110108416 B CN 110108416B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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Abstract
The invention relates to a smoke leakage detection device suitable for large-flow gas, which comprises a liquid flow container, a gas container, an atomizing heating rod and a gas inlet for introducing gas, wherein the lower wall of the liquid flow container surrounds the atomizing heating rod and is provided with a smoke flow port for smoke to rise and pass, a gas cavity for allowing gas to flow through and placing the atomizing heating rod is formed between the lower wall of the liquid flow container and the gas container, the upper end of the gas cavity is provided with a conical flow guide cavity, the bottom surface of the liquid flow container is provided with a plurality of air leakage channels which penetrate through the lower wall of the liquid flow container and are used for allowing the gas to flow from the gas cavity to the inner space of the liquid flow container, and the lower ends of the air leakage channels. Utilize the guiding action of water conservancy diversion chamber and the effect of losing air passageway, discharge unnecessary gas from gas cavity, be difficult to cause the smog to flow through the mouth, can effectually alleviate the condition that consequently the too big liquid that causes of gas flow can not drop to the gas container from the liquid flow container.
Description
Technical Field
The invention relates to the technical field of air tightness detection devices, in particular to a smoke leakage detection device suitable for large-flow gas.
Background
In productive life, there are a large number of pipes and systems that work with liquids (gas, liquid or a combination of both), many industrial machines, domestic HVAC ventilation systems and other devices that operate with liquids, which may be, for example, gases such as air or liquids of evaporative systems, such as fuels, hydraulic liquids, manufacturing gases and liquids, etc.; and in the automotive industry, including fuel systems, exhaust systems, heating, cooling, and ventilation (HVAC) systems, as well as hydraulic power steering and a few braking systems. Most environments require high tightness of the pipe and/or system. In all of these systems and situations, the fluid system must be properly sealed to prevent leakage of the system fluid;
particularly in the automobile industry, the air tightness test is an indispensable performance index test of equipment such as automobiles and the like in the research and development process or before the final assembly process. As leaks in fluid systems can be very difficult to detect and/or locate, as the leaks are small or in locations that are not easily accessible. The principle of the air tightness test adopted in the industry is mainly that smoke to be detected (which is generated by atomizing fuel oil under the general condition and is adaptive to the actual use condition of a vehicle system) is injected into a fuel oil discharge system of a vehicle, so that the smoke can flow out of the system from a position with weaker sealing performance by utilizing the pressure difference between the inside and the outside of the system, and the air tightness of the system is detected by detecting the leakage position and the leakage amount of the smoke, so that the system is subjected to an optimized sealing measure. For example, patent document (CN 108291851 a) discloses a smoke machine, which heats a liquid by a heating element and mixes with a gas during heating to atomize the liquid to generate smoke, and then conveys the smoke to a system to be detected by a pipeline.
Chinese application (CN109470420A) discloses an airtight smoke leakage detecting device for a fluid system, which includes a fluid reservoir arranged vertically and having a smoke discharge connection port at the top, a gas medium container installed on the bottom end surface of the fluid reservoir and having an inner space vertically communicated with the inner space of the fluid reservoir, an atomizing heating rod installed in the gas medium container along the vertical direction, and a medium incidence connection port installed on the gas medium container and located on the circumferential side of the atomizing heating rod. However, because the connection part of the fluid liquid storage container and the gas medium container is vertically communicated, when the flow of gas introduced into the medium incidence adapter is large, the large-flow gas can only pass through the connection part of the fluid liquid storage container and the gas medium container, so that the liquid cannot flow into the gas medium container to be contacted with the heating rod, the liquid cannot be heated, and finally smoke cannot be generated; there is therefore a need for an improved smoke leak detection apparatus to accommodate the passage of large flows of gas.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a smoke leakage detecting device suitable for large flow rate gas.
In order to achieve the purpose, the invention adopts the following technical scheme:
a smoke leakage detection device suitable for large-flow gas comprises a liquid flow container, a gas container, an atomization heating rod and a gas inlet, wherein the top of the liquid flow container is provided with a smoke discharge port and used for storing liquid to be atomized, the gas container is arranged at the bottom of the liquid flow container, the inner space of the gas container is communicated with the inner space of the liquid flow container and used for gas flowing through, the atomization heating rod is arranged in the gas container, the upper end of the gas container penetrates through the liquid flow container and then is arranged in the liquid flow container and used for heating liquid gas in a mixed state to form smoke, the gas inlet is used for introducing gas into the gas container, the lower wall of the liquid flow container surrounds the atomization heating rod and is provided with a smoke flow port through which the smoke can rise, a gas chamber used for gas flowing through and placing the atomization heating rod is formed between the lower wall of the, the upper end of the gas cavity is provided with a conical flow guide cavity, the bottom surface of the liquid flow container is provided with a plurality of air leakage channels which run through the lower wall of the liquid flow container and are used for air to flow from the gas cavity to the inner space of the liquid flow container, and the lower ends of the air leakage channels are communicated with the flow guide cavity.
Preferably, the air leakage channel is arranged at the bottom of the liquid flow container around the center of the atomizing heating rod, and the side wall of the air leakage channel is communicated with the smoke flow-through opening.
Preferably, the lower wall of the liquid flow container is further provided with a liquid flow channel for liquid to flow into the gas chamber from the liquid flow container, and the liquid flow channel penetrates through the bottom of the liquid flow container and is connected with the bottom end of the diversion cavity.
Preferably, the diversion cavity is opened on the lower surface of the liquid flow container, a ring of annular wall is formed on the upper surface of the gas container and upwards surrounds the gas chamber, and the liquid flow channel is positioned outside the annular wall.
Preferably, a liquid baffle plate is arranged above the liquid in the liquid flow container and used for blocking the non-atomized liquid from rising, and the smoke flowing-through opening and the air leakage channel are both positioned in the coverage range of the liquid baffle plate.
Preferably, the gas chamber is rectangular, and the gas introducing port is tangent to the outer circle of the gas chamber.
Preferably, a liquid level observation tube for observing the liquid level of the liquid in the liquid flow container is further arranged outside the liquid flow container, and the upper end and the lower end of the liquid level observation tube are respectively connected to the bottom end and the upper end of the liquid flow container and are communicated with the inside of the liquid flow container.
Preferably, the liquid level observation tube is a tubular structure made of a transparent or translucent material.
Preferably, the region with the highest surface temperature of the atomizing heating rod is positioned in the smoke flow through opening or below the smoke flow through opening and close to the smoke flow through opening.
By adopting the scheme, the redundant gas is discharged from the gas cavity by utilizing the guiding effect of the flow guide cavity and the air leakage effect of the air leakage channel, smoke is not easy to flow through the mouth, the condition that liquid cannot fall into the gas container from the liquid flow container due to overlarge gas flow can be effectively relieved, and the practicability is high.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 2 is an enlarged view at F of FIG. 1;
FIG. 3 is a schematic structural diagram of an embodiment of the present invention;
FIG. 4 is a schematic structural view of a gas container according to an embodiment of the present invention;
FIG. 5 is a schematic view of a combined structure of a smoke flow vent and a bleed passage according to an embodiment of the present invention;
FIG. 6 is an enlarged view at H in FIG. 5;
fig. 7 is a schematic diagram of the structural principle of the control method of the present embodiment.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1 to 6, the present embodiment provides a smoke leak detection apparatus suitable for a large flow rate gas, which includes:
a liquid flow container 10 (the inner space of which is preferably in a cylindrical space shape) provided with an aerosol discharge port 11 at the top for storing liquid to be atomized, wherein an oil filling port 15 for filling the liquid to be atomized into the inner space of the liquid flow container 10 is arranged above the liquid flow container 10;
a gas container 20 installed at the bottom of the liquid flow container 10 and having an inner space communicated with the inner space of the liquid flow container 10 for flowing gas therethrough, mainly for providing a space for temporarily storing auxiliary gas (such as air or oxygen) delivered by pressure;
an atomizing heating rod 30 disposed inside the gas container 20 and having an upper end penetrating the liquid flow container 10 and disposed inside the liquid flow container 10 for heating the liquid gas in a mixed state to form an aerosol;
a gas inlet 21 for introducing gas into the gas container 20, which is mainly used for interfacing with an external gas source apparatus a (such as an air compressor, a gas pump, etc.) to inject auxiliary gas into the gas container 20, and which is opened on the gas container 20 or fixed on the gas container 20 through a pneumatic joint;
the lower wall of the liquid flow container 10 is provided with a smoke flow opening 12 around the atomizing heating rod 30 for smoke to rise and pass, liquid atomized by the smoke flow opening 12 rises, and the liquid in the liquid flow container 10 moves downwards to the gas container 20 under the action of gravity to be heated;
a gas chamber 22 (preferably in a cylindrical space shape) for gas to flow through and place the atomizing heating rod 30 is formed between the lower wall of the liquid flow container 10 and the gas container;
both the gas inlet 21 and the smoke passage 12 penetrate the gas chamber 22;
the upper end of the gas chamber 22 is provided with a conical flow guide cavity 40, the diameter of the bottom end of the flow guide cavity 40 is larger than that of the upper end of the flow guide cavity 40, the upper end of the flow guide cavity 40 is connected with the smoke flow through hole 12, and gas or atomized smoke can move upwards along the inclined plane of the flow guide cavity 40 under the flow guide effect of the flow guide cavity 40 in the rising process by utilizing the conical flow guide cavity 40;
the bottom surface of the liquid flow container 10 is provided with a plurality of air leakage channels 13 which penetrate through the lower wall of the liquid flow container 10 and are used for air to leak from the air chamber 22 to the inner space of the liquid flow container 10, and the lower ends of the air leakage channels 13 are communicated with the flow guide cavity 40. After gas and liquid are mixed, the liquid close to the atomizing heating rod 30 is firstly atomized and rises together with the gas to flow out of the smoke flow port 12 into the liquid flow container 10; meanwhile, in the process that the gas moves upwards in the flow guide cavity 40, because the space at the smoke flow port 12 is filled with the atomized smoke (mainly filling gaps between the liquids), the redundant gas can only be discharged from the air leakage channel 13, and the air leakage channel 13 can also be used as a channel for the liquid to move from the liquid flow container 10 to the gas container 20, so that the flow rate of the liquid to move from the liquid flow container 10 to the gas container 20 is increased.
Based on the above structure, through the vertical arrangement of the liquid flow container 10 and the gas container 20 and the communication action of the smoke flow through hole 12, the liquid in the liquid flow container 10 moves into the gas chamber 22 of the gas container 20 through the smoke flow through hole 12 under the action of gravity to be mixed with gas, meanwhile, the gas-liquid mixture in the gas chamber is atomized under the action of the atomizing heating rod 30 to generate smoke, under the action of the density difference between the liquid fluid and the smoke and the pressure generated by the external gas source device a, the smoke moves upwards and is finally discharged into the fluid system to be subjected to leak detection of tightness through the smoke discharge hole 11 after penetrating through the liquid level of the fluid which is not atomized, so as to finally determine the sealing weak point of the system by detecting the leakage position and the leakage amount of the smoke; meanwhile, when the flow rate of the gas introduced into the gas introducing port 21 is large, the guiding function of the flow guiding cavity 40 and the air releasing function of the air releasing channel 13 are utilized to discharge the redundant gas from the gas chamber 22, so that the smoke is not easy to flow through the port 12, the condition that the liquid cannot fall into the gas container 20 from the liquid flow container 10 due to the overlarge gas flow rate can be effectively relieved, and the gas container has strong practicability.
If the air release channel 13 is opened in the middle of the inclined plane of the flow guide cavity 40, the air between the air release channel 13 and the smoke flow-through opening 12 will move to the smoke flow-through opening 12 under the action of the flow guide cavity 40, occupying the space therein, and affecting the rise and discharge of smoke, therefore, in order to facilitate the discharge of the excessive air in the air chamber 22, the air release channel 13 of the present embodiment is circumferentially arranged at the bottom of the liquid flow container 10 around the center of the atomizing heating rod 30, and the side wall of the air release channel 13 is communicated with the smoke flow-through opening 12. Therefore, the gas moving to the upper end of the diversion cavity along the diversion cavity 40 will rise along the air escape channel 13 at the top end of the diversion cavity (i.e. near the area where the smoke rises), thereby achieving a more reasonable discharge of the gas.
When the flow rate introduced into the gas introducing port 21 is too large, the spaces in the smoke flow port 12 and the air release channel 13 are filled with smoke, in order to ensure that the liquid smoothly moves from the liquid flow container 10 to the gas container 20, the lower wall of the liquid flow container 10 of the embodiment is further provided with a liquid flow channel 14 for the liquid to flow from the liquid flow container 10 into the gas chamber 22, and the liquid flow channel 14 penetrates through the bottom of the liquid flow container 10 and is connected with the bottom end of the flow guide cavity 40. Since the liquid flow channel 14 is located at the bottom end of the flow guide cavity 40, that is, at the end of the flow guide cavity 40 far from the atomizing heating rod 30, when the gas moves on the inclined surface of the flow guide cavity 40, the gas will rise along the inclined surface, so that when the flow rate of the gas is relatively large, even if the gas fills the smoke flow port 12 and the air release channel 13, the liquid can be effectively ensured to move from the liquid flow container 10 to the gas container 20 by using the liquid flow channel 14.
Further, in order to more effectively prevent the gas in the gas chamber 22 from affecting the liquid flow channel 14, the flow guiding cavity 40 is opened on the lower surface of the liquid flow container 10, a ring-shaped wall 23 is formed on the upper surface of the gas container 20 upward around the gas chamber 22, and the liquid flow channel 14 is located outside the ring-shaped wall 23. Thus, the gas is further prevented from moving toward the liquid flow path 14 by the annular wall 23 during the rising process, thereby ensuring the liquid communication.
In order to reduce or avoid the phenomenon that the liquid fluid which is not atomized is brought into the fluid system to be detected in the flowing process of the smoke to the maximum extent, improve the accuracy of leak detection and reduce the loss of the liquid fluid, a liquid baffle plate 50 which is positioned above the liquid in the liquid flow container 10 and used for blocking the liquid which is not atomized from rising is further arranged in the liquid flow container 10 of the embodiment, and the smoke flow opening 12 and the air leakage channel 13 are both positioned in the coverage range of the liquid baffle plate 50. Thus, as the fumes pass through the fluid level and continue to move upwardly, the liquid barrier 50 may obstruct the flow path of the fumes around the liquid flow barrier 40, and the liquid fluid attached to the fumes may separate from the fumes and fall into the fluid level under the shielding effect of the liquid barrier 50, thereby ensuring that relatively single fumes are discharged into the fluid system to be tested for leaks.
Further, the gas chamber 22 of the present embodiment is rectangular, and the gas inlet 21 is tangential to the outer circle of the gas chamber 22. By utilizing the tangency of the gas introducing port 21 and the gas chamber 22, the gas entering the gas chamber 22 can rotate between the gas chamber 22 and the atomizing heating rod 30, and the flowability of the gas is further ensured.
The device can timely judge the liquid amount in the liquid flow container 10 so as to supplement liquid fluid into the liquid storage container 10 through the oil filling port 15, and meanwhile, conditions are created for realizing pressure detection and tightness detection of the device; the liquid flow container 10 of the present embodiment is further provided with a liquid level observing tube 60 for observing the liquid level of the liquid in the liquid flow container 10, and the upper end and the lower end of the liquid level observing tube 60 are respectively connected to the bottom end and the upper end of the liquid flow container 10 and are communicated with the interior of the liquid flow container 10. By using the liquid level measuring tube 50 as a communicating vessel, the amount of liquid in the liquid flow container 10 can be determined by observing the liquid level of the liquid level observing tube 60 based on the liquid pressure principle; of course, a pressure detection device may also be provided on the fluid container 10 to facilitate detection of the sealing properties of the device itself.
Further, in order to facilitate observation of the liquid level, the liquid level observation tube 60 of the present embodiment is a tubular structure made of a transparent or translucent material.
The region where the temperature of the surface of the atomizing heating rod 30 is the highest is located in the mist flow passage 12 or below the mist flow passage 12 and near the mist flow passage 12, so that the liquid and the gas entering the gas chamber 22 can be sufficiently mixed and atomized. The liquid-gas mixing area can be ensured to be located in the area of the maximum surface temperature of the atomizing heating rod 30, so as to ensure that the liquid fluid is sufficiently heated and atomized.
Further, in order to enhance the guiding function to the smoke, a smoke guiding and collecting pipe 70 which is connected with the smoke discharge port 11 in an abutting mode is arranged in the liquid flow container 10; the smoke guiding and collecting pipe 70 is provided with a vertical hole communicated with the smoke discharge port 11 along the vertical direction, and the circumferential wall of the smoke guiding and collecting pipe 70 is provided with a circumferential hole communicated with the vertical hole and used for collecting smoke.
In addition, the apparatus of the present embodiment can be controlled by referring to the control system shown in fig. 7, wherein a thermometer B for detecting the temperature of the auxiliary gas in real time and a pressure gauge D for detecting the delivery pressure of the auxiliary gas in real time are provided on the gas medium pipe P that communicatively interfaces the gas introduction port 21 with the external gas source equipment a (such as an air compressor, an air pump, or the like), and the heating temperature of the atomizing heating rod 30 is controlled by the PWM pulse modulator E. The change and the magnitude of the pressure detected by the pressure gauge D can also be used for judging the air tightness of an external system.
The space of gas in the present device is generally referred to as the gap between the liquid and the liquid, and the flow rate of gas in the present device is based on the flow rate of gas that is capable of generating smoke relative to gas in other aerosol machines in the art. The gas flow and pressure required for the aerosol generating machine to generate the aerosol are generally small compared to those in life and production.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A smoke leakage detection device suitable for large-flow gas comprises a liquid flow container, a gas container, an atomization heating rod and a gas inlet, wherein the top of the liquid flow container is provided with a smoke discharge port and used for storing liquid to be atomized, the gas container is arranged at the bottom of the liquid flow container, the inner space of the gas container is communicated with the inner space of the liquid flow container and used for gas flowing through, the atomization heating rod is arranged in the gas container, the upper end of the gas container penetrates through the liquid flow container and then is arranged in the liquid flow container and used for heating liquid gas in a mixed state to form smoke, the gas inlet is used for introducing gas into the gas container, the lower wall of the liquid flow container surrounds the atomization heating rod and is provided with a smoke flow port for smoke to rise, a gas chamber used for gas flowing through and placing the atomization heating rod is formed between the lower wall of the liquid, the liquid flow container is characterized in that a conical flow guide cavity is formed in the upper end of the gas cavity, a plurality of air leakage channels which penetrate through the lower wall of the liquid flow container and are used for air to leak from the gas cavity to the inner space of the liquid flow container are formed in the bottom surface of the liquid flow container, and the lower ends of the air leakage channels are communicated with the flow guide cavity;
the lower wall of the liquid flow container is also provided with a liquid flow channel for liquid to flow into the gas cavity from the liquid flow container, and the liquid flow channel penetrates through the bottom of the liquid flow container and is connected with the bottom end of the diversion cavity; the flow guide cavity is arranged on the lower surface of the liquid flow container, a ring of annular wall is formed on the upper surface of the gas container upwards around the gas cavity, and the liquid flow channel is positioned outside the annular wall.
2. The smoke leak detection apparatus of claim 1, wherein said air escape channel is circumferentially disposed around the center of the atomizing heating rod at the bottom of the liquid flow container, the side wall of said air escape channel communicating with the smoke flow port.
3. The smoke leak detection apparatus of claim 1 wherein said liquid flow container further comprises a liquid barrier positioned above liquid in said liquid flow container for blocking unaeromized liquid from rising, said smoke flow port and said air release passage being positioned within the footprint of said liquid barrier.
4. Smoke leak detection apparatus as defined in claim 1 wherein said gas chamber is rectangular and said gas introduction port is tangential to an outer circle of said gas chamber.
5. Smoke leak detection apparatus as defined in claim 1 wherein said liquid flow vessel is further externally provided with a level sight tube for observing the level of liquid in the liquid flow vessel, said level sight tube being connected at its upper and lower ends to the bottom and upper ends of the liquid flow vessel respectively and communicating with the interior of the liquid flow vessel.
6. The smoke leak detection apparatus of claim 5 wherein said level sight tube is a tubular structure made of a transparent or translucent material.
7. Smoke leak detection apparatus according to any of claims 1-6, wherein said zone of highest surface temperature of the atomizing heating rod is located in or below the smoke flow opening and close to the smoke flow opening.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910435847.5A CN110108416B (en) | 2019-05-23 | 2019-05-23 | Smoke leakage detection device suitable for large-flow gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910435847.5A CN110108416B (en) | 2019-05-23 | 2019-05-23 | Smoke leakage detection device suitable for large-flow gas |
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| CN110108416A CN110108416A (en) | 2019-08-09 |
| CN110108416B true CN110108416B (en) | 2020-10-23 |
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| CN208187625U (en) * | 2018-06-04 | 2018-12-04 | 西安建筑科技大学 | Anti-blocking device for pressure measurement suitable for wet flue gas pressure measurement |
| CN109470420A (en) * | 2018-11-26 | 2019-03-15 | 惠州和创智造科技有限公司 | A kind of fluid system air-tightness smog leakage detection apparatus |
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| CN1924418A (en) * | 2005-08-30 | 2007-03-07 | 刘辉堂 | Gas inlet device |
| US8459017B2 (en) * | 2008-04-09 | 2013-06-11 | Woodward, Inc. | Low pressure drop mixer for radial mixing of internal combustion engine exhaust flows, combustor incorporating same, and methods of mixing |
| JP5945152B2 (en) * | 2012-04-25 | 2016-07-05 | 株式会社ダイセル | Gas generator |
| US10602775B2 (en) * | 2016-07-21 | 2020-03-31 | Rai Strategic Holdings, Inc. | Aerosol delivery device with a unitary reservoir and liquid transport element comprising a porous monolith and related method |
| CN207056495U (en) * | 2017-07-31 | 2018-03-02 | 广东大任生物科技有限责任公司 | Automatic exhaust structure of gas-liquid mixing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3515676A (en) * | 1967-09-18 | 1970-06-02 | Eaton Yale & Towne | Oil fog generating device |
| CN205092223U (en) * | 2015-11-11 | 2016-03-16 | 北京七星华创电子股份有限公司 | Static electrification liquid fog belt cleaning device |
| CN207964196U (en) * | 2018-04-03 | 2018-10-12 | 北京汽车研究总院有限公司 | A kind of vehicle and smoke generating device |
| CN208187625U (en) * | 2018-06-04 | 2018-12-04 | 西安建筑科技大学 | Anti-blocking device for pressure measurement suitable for wet flue gas pressure measurement |
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Effective date of registration: 20200509 Address after: B201, building 2, No. 8, Chenwu Road, Dakang community, Yuanshan street, Longgang District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Hechuang Intelligent Manufacturing Co., Ltd Address before: 516000 Laowui Group, Xihucun Section, Inner Ring Road, Freshwater Qiuchang Street, Huiyang District, Guangdong Province, Fourth Floor of Longsheng Science and Technology Park Applicant before: HUIZHOU HECHUANG SMART MANUFACTURING TECHNOLOGY Co.,Ltd. |
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