CN209511211U - A kind of waterproof and breathable valve - Google Patents
A kind of waterproof and breathable valve Download PDFInfo
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- CN209511211U CN209511211U CN201920117219.8U CN201920117219U CN209511211U CN 209511211 U CN209511211 U CN 209511211U CN 201920117219 U CN201920117219 U CN 201920117219U CN 209511211 U CN209511211 U CN 209511211U
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- waterproof
- baffle
- breathable
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Abstract
The utility model discloses a kind of waterproof and breathable valves, including valve body and the end cap being installed on valve body, offer air hole on valve body, waterproof and breathable component is provided in the air hole；The hollow cylinder connecting with air hole is provided in the outside wall surface of the valve body, air hole, the waterproof and breathable component are connected with hollow cylinder cavity；The valve body includes bottom surface and side wall surface, is provided with single order stop water and second order stop water in the cavity that bottom surface and side wall surface are formed, opening is offered in the side wall surface.The utility model makes up the deficiency of membrane type sealed valve body using mechanical seal principle, by the way that single order stop water, second order stop water, air hole, hollow cylinder and waterproof and breathable component are combined, it realizes waterproof and guarantees the gas exchanges between confined space and the external world, improve the waterproof and breathable performance of waterproof and breathable valve.
Description
Technical field
The utility model belongs to waterproof and breathable valve gate technology field, and in particular to a kind of waterproof and breathable valve.
Background technique
With the continuous promotion of electronic component accuracy, the sensibility of environment is significantly enhanced.It often works out of office
The communication equipment of external environment includes a large amount of precise electronic component, by finely ground particles, heavy rain, wind, the sun in field environment
The influence of the various weather conditions such as light irradiation, temperature cataclysm, the precision of these components will receive influence, or even failure, existing
Technology generallys use seal casinghousing and is sealed to component, still, when using seal casinghousing, meeting when electronic component works
So that case temperature increases, there's a sudden fall in temperature, when the quick-fried rain of burst when encountering, and case temperature rapid decrease, inner and outer air pressure is not
Balance, forming water suction effect causes enclosure interior to form steam or ponding, causes short circuit, part corrosion, causes to equipment
Irreversible damage.
In order to guarantee electronic component in the application in the field of bad environments, people use the installation membrane type on seal casinghousing anti-
Water vent valve, membrane type waterproof vent valve can antiacid alkali resistant, low temperature resistant to high temperatures also being capable of normal work in the field of bad environments
Make, membrane type waterproof vent valve alleviates electronic component to a certain extent and leads to the problem of in the operating condition of field.But some
In the case of, such as temperate zone chill night, moisture frosting (ice), though at this moment membrane type waterproof vent valve has obstructed the temperature difference and causes to seal
Enclosure interior ponding, still, frosting (ice) or ponding are covered on membrane type waterproof and breathable valve surface, will lead to membrane type waterproof and breathable
Defective valve, can not waterproof and breathable, electronic component is finally damaged, in addition, due to membrane type waterproof vent valve material itself and structure
Limitation, not can guarantee the drying of valve inner, due to can not processing enter the liquid of valve body, the liquid accumulated in valve body flows into
Seal casinghousing causes the damage of electronic component in shell.Therefore, waterproof and breathable function can be maintained in various working by being badly in need of one kind
The water-proof ventilated device of energy.
Utility model content
It is saturating the technical problem to be solved by the utility model is in view of the above shortcomings of the prior art, provide a kind of waterproof
Air valve, the waterproof and breathable valve is by by single order stop water and the combination of second order stop water, air hole, hollow cylinder and anti-
Water ventilating component combines, and the gas exchanges where realizing waterproof and guaranteeing electronic component between confined space and the external world improve anti-
The waterproof and breathable performance of water vent valve.
In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of waterproof and breathable valve, including valve
Main body and the end cap being installed on the valve body, which is characterized in that air hole, the air hole are offered on the valve body
Inside it is provided with waterproof and breathable component；
The hollow cylinder connecting with air hole, air hole, the waterproof and breathable are provided in the outside wall surface of the valve body
Component is connected with hollow cylinder cavity；
The valve body includes bottom surface and side wall surface, is provided with single order stop water in the cavity that bottom surface and side wall surface are formed
With second order stop water, opening is offered in the side wall surface.
Above-mentioned a kind of waterproof and breathable valve, which is characterized in that the single order stop water includes two ports and two
The step surface of step piece, two port faces opening, two step pieces is opposite and interval setting, the step surfaces of two step pieces it
Between be provided with single order central part, be provided with two groups of screening assemblies on single order central part, every group of screening assembly and corresponding step piece
Step surface forms the first airflow channel, and each first airflow channel is connected to corresponding port respectively.
Above-mentioned a kind of waterproof and breathable valve, which is characterized in that the second order stop water includes water storage tank and two resistances
Water baffle group；The baffle group that blocks water described in two is located at the two sides of water storage tank.
A kind of above-mentioned waterproof and breathable valve, which is characterized in that the outer wall of one end of the hollow cylinder and the bottom surface
Face is integrally formed, and the other end of the hollow cylinder is provided with external screw thread；The diameter of hollow cylinder cavity is 3mm~6mm.
Above-mentioned a kind of waterproof and breathable valve, which is characterized in that the waterproof and breathable component includes hollow core, hollow core
One end of body is covered with waterproof ventilated membrane；The air hole, waterproof ventilated membrane, hollow core cavity are connected with hollow cylinder cavity
It is logical；It is provided with external screw thread on the hollow core and is threadedly coupled with air hole.
Above-mentioned a kind of waterproof and breathable valve, which is characterized in that the end cap is fixedly connected by bolt with side wall surface；Institute
The threaded hole offered in side wall surface for connection end cap is stated, the number of the threaded hole is 5.
Above-mentioned a kind of waterproof and breathable valve, which is characterized in that the single order central part is fixed on bottom surface, the step
Part is fixed in side wall surface；The single order central part is prismatoid.
Above-mentioned a kind of waterproof and breathable valve, which is characterized in that the screening assembly includes interval and disposed in parallel three
A baffles, one end of three baffles are fixedly connected with single order central part, and the other end of three baffles is equal
Extend to the step surface；One end that the baffles extend to the step surface is prismatoid.
Above-mentioned a kind of waterproof and breathable valve, which is characterized in that the water storage tank notch is directed parallel to opening for port
Mouth direction；The baffle group that blocks water includes interval and successively first baffle disposed in parallel, second baffle, third baffle and the 4th
Baffle, the first baffle, second baffle, third baffle and fourth gear plate form the second airflow channel；The first baffle and
One end of fourth gear plate is connect with the side wall of water storage tank, and the other end of first baffle and fourth gear plate prolongs to the side wall surface
It stretches；One end of the second baffle and third baffle is fixedly connected with side wall surface, the other end of second baffle and third baffle
Extend to the side wall of water storage tank.
Above-mentioned a kind of waterproof and breathable valve, which is characterized in that the air hole is located in the notch of water storage tank.
Compared with the prior art, the utility model has the following advantages:
1, the waterproof and breathable valve of the utility model utilizes mechanical seal principle, effectively makes up membrane type sealed valve body not
Foot, by the way that by single order stop water and the combination of second order stop water, air hole, hollow cylinder and waterproof and breathable component are combined, real
Gas exchanges where existing waterproof and guarantee electronic component between confined space and the external world, improve the waterproof and breathable of waterproof vent valve
Performance.
2, the single order stop water of the utility model is made of single order central part, screening assembly and step piece, and second order blocks water
Structure is made of water storage tank and the baffle group that blocks water, and by the design that blocks water of staged and dioptric type, is realized water stop function, can will be seeped
Enter the intracorporal liquid water of valve to be stored in water storage tank, can be rapidly by water evaporation after external environment restores normal, vapor is through the
Two airflow channels, the first airflow channel, port and opening, leave valve inner, guarantee the drying of valve inner, are further ensured that
The drying of confined space where electronic component.
3, preferably, hollow cylinder one end of the utility model is fixedly connected with valve body, the other end and electronics member
Confined space wall surface where part is connected through a screw thread, and be can effectively avoid gas or liquid from junction and is penetrated into confined space.
4, the waterproof and breathable component of the utility model where guaranteeing electronic component hand between confined space and the external world by gas
While changing, may filter that the vapor in air, guarantee the drying property for entering the gas of confined space, at the same can avoid dust,
Erosive parti object enters confined space.
5, sectional area of the baffles of the utility model close to one end of step surface is less than the section far from step surface one end
Product, the gap between two inclined-planes up and down of baffles and the vertical plane and corresponding step surface that connect two inclined-planes constitute gas
Expansion chamber, the fluid stream interface for flowing into expansion chamber expand, and form fierce whirlpool, and the kinetic energy of gas is to pressure energy and thermal energy
Conversion, kinetic energy reduce, and moisture condensation in gas realizes the preliminary resistance effect of single order stop water.
5, the utility model structure is simple, and principle is reliable, and design cost is low, in real life there is very high popularization to answer
With value.
With reference to the accompanying drawings and examples, the technical solution of the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the utility model waterproof and breathable valve mechanism schematic diagram；
Fig. 2 is the utility model waterproof and breathable valve scheme of installation；
Fig. 3 is the utility model air hole, hollow cylinder and waterproof and breathable component connection relationship diagram；
Fig. 4 is the structural schematic diagram of the utility model valve body；
Fig. 5 is the structural schematic diagram of the utility model side wall surface.
Description of symbols:
1-valve body；1-1-air hole；1-2-bottom surface；
1-3-side wall surface；1-4-opening；1-5-single order central part；
1-6-screening assembly；1-7-step piece；1-8-port；
The first airflow channel of 1-9-；1-10-water storage tank；The second airflow channel of 1-11-；
1-12-threaded hole；1-13-first baffle；1-13-second baffle；
1-14-third baffle；1-15-fourth gear plate；2-end caps；
3-hollow cylinders；3-1-hollow cylinder cavity；3-2-waterproof ventilated membrane；
3-3-hollow core；3-4-hollow core cavity.3-5-external screw thread；
4-confined spaces；4-1-shell.
Specific embodiment
As described in Fig. 1~5, the waterproof vent valve of the present embodiment including valve body 1 and is installed on the valve body 1
End cap 2 offers air hole 1-1 on the valve body 1, is provided with waterproof and breathable component in the air hole 1-1；
It is provided with the hollow cylinder 3 connecting with air hole 1-1 in the outside wall surface of the valve body 1, it is air hole 1-1, described
Waterproof and breathable component is connected with hollow cylinder cavity 3-1；
Have one in the cavity that the valve body 1 is formed including bottom surface 1-2 and side wall surface 1-3, bottom surface 1-2 and side wall surface 1-3
Rank stop water and second order stop water offer opening 1-4 on the side wall surface 1-3；In the present embodiment, single order stop water
Be set in cavity from bottom to top with second order stop water, side wall surface 1-3 by first while, second while and third side successively connect and
At first one end of one end and third while second while second forms opening 1-4, it is ensured that valve master
The abundant discharge of aqueous vapor in body 1.
In the present embodiment, such as Fig. 4, the single order stop water includes two port 1-8 and two step piece 1-7, and two
The step surface of port 1-8 face opening 1-4, two step piece 1-7 are opposite and interval is arranged, the step surface of two step piece 1-7
Between be provided with single order central part 1-5, two groups of screening assemblies 1-6, every group of screening assembly 1-6 are provided on single order central part 1-5
With the step surface of corresponding step piece 1-7 formed the first airflow channel 1-9, each first airflow channel 1-9 respectively with it is corresponding
Port 1-8 connection；
In the present embodiment, such as Fig. 4, the second order stop water includes water storage tank 1-10 and two baffle groups that block water；Two
The baffle group that blocks water is located at the two sides of water storage tank 1-10.
Reserved space between single order stop water and second order stop water, the space reserved can make the knot that blocks water into second order
The gas flow rate of structure slows down, and sufficiently consumes the energy of gas.
As shown in Figure 1, Figure 2 and Fig. 3, in the present embodiment, one end of hollow cylinder 3 and the outside wall surface of bottom surface 1-2 are integrally formed, institute
The diameter for stating hollow cylinder cavity 3-1 is 3mm~6mm, preferably 4mm, and the other end of the hollow cylinder (3) is provided with outer spiral shell
Line (3-5).The other end of hollow cylinder 3 and the shell 4-1 of confined space 4 where electronic component are connected through a screw thread, hollow posts
Body cavity 3-1 is connected with confined space 4.
Such as Fig. 3, in the present embodiment, the waterproof and breathable component includes hollow core 3-3, and one end of hollow core 3-3 is covered
It is stamped waterproof ventilated membrane 3-2；The air hole 1-1, waterproof ventilated membrane 3-2, hollow core cavity 3-4 and hollow cylinder cavity 3-
1 is connected；It is provided with external screw thread on the hollow core 3-3 and is threadedly coupled with air hole 1-1.Dry gas in valve body 1
Body enters where electronic component through air hole 1-1, waterproof ventilated membrane 3-2, hollow core cavity 3-4 and hollow cylinder cavity 3-1
Confined space 4 realizes confined space 4 and extraneous air circulation, balances pressure difference.
Such as Fig. 4, in the present embodiment, the end cap 2 is fixedly connected by bolt with side wall surface 1-3；On the side wall surface 1-3
The number for offering the threaded hole 1-12, the threaded hole 1-12 for connection end cap 2 is 5.
Such as Fig. 4, in the present embodiment, the single order central part 1-5 is fixed on the 1-2 of bottom surface, and the step piece 1-7 is fixed on
On side wall surface 1-3；The single order central part 1-5 is prismatoid, is parallel to bottom surface and cuts off the planar graph that the prismatoid obtains
For inverted trapezoidal, single order central part 1-5 may be replaced by being parallel to the plan view behavior up-side down triangle cut off bottom surface, rectangular
Or rectangular solid.
Such as Fig. 4, in the present embodiment, the screening assembly 1-6 includes interval and three baffles disposed in parallel, three institutes
The one end for stating baffles is fixedly connected with single order central part 1-5, and the other end of three baffles is to the step surface
Extend；One end that the baffles extend to step surface is prismatoid.Baffles and step piece 1-7 are both secured on the 1-2 of bottom surface,
The step surface of each step piece 1-7 includes three vertical planes, and baffles are prismatoid close to one end of the vertical plane, trapezoidal
Body includes the first inclined-plane, the second inclined-plane, the first upright plane and the second upright plane, and the first upright plane and the second upright plane are parallel to each other
And perpendicular to bottom surface 1-2, the first upright plane is between the second upright plane and vertical plane, and the area of the first upright plane is less than
The area of two upright planes, the gap between the first inclined-plane, the second inclined-plane, the first upright plane and corresponding step surface constitute gas expansion
Chamber, the fluid stream interface for flowing into expansion chamber expand, and form fierce whirlpool, and the kinetic energy of gas turns to pressure energy and thermal energy
Change, kinetic energy reduces, and moisture condensation in gas realizes preliminary resistance effect.Baffles can also be formed directly by rectangular-shaped piece turning.
Such as Fig. 4 and Fig. 5, in the present embodiment, the opening side for being directed parallel to port 1-8 of the water storage tank 1-10 notch
To；The baffle group that blocks water includes interval and successively first baffle 1-13 disposed in parallel, second baffle 1-14, third baffle 1-
15 and fourth gear plate 1-16, the first baffle 1-13, second baffle 1-14, third baffle 1-15 and fourth gear plate 1-16 formed
Second airflow channel 1-11；Side wall of the one end of the first baffle 1-13 and fourth gear plate 1-16 with the water storage tank 1-10
The other end of connection, first baffle 1-13 and fourth gear plate 1-16 extend to the side wall surface 1-3；The second baffle 1-14
It is fixedly connected with the side wall surface 1-3 with one end of third baffle 1-15, second baffle 1-14 and third baffle 1-15's is another
One end extends to the side wall of water storage tank 1-10.The water storage tank 1-10 is for collecting coagulating liq, the notch of water storage tank 1-10
Upwards, port 1-8 is located at the lower part of cavity, and the opening 1-4 face with side wall surface 1-3 can effectively avoid direct water inlet.Gas stream
It is formed and is vortexed through the second airflow channel 1-11, reduced the flow velocity of gas, consume the energy of gas, moisture condensation, by waterproof and breathable
Interception component is collected by water storage tank 1-10 under gravity, and confined space 4 where will not entering electronic component reaches resistance
The purpose of water.
Such as Fig. 4, in the present embodiment, the air hole 1-1 is located in the notch of water storage tank 1-10.
The installation and waterproof and breathable method of the waterproof vent valve of the present embodiment are as follows:
Where one end for having external screw thread 3-5 of hollow cylinder 3 is screwed in electronic component on the shell 4-1 of confined space 4
The notch of through-hole, water storage tank 1-10 is upward, is fixed with adaptation nut, and end cap 2 is fixed on side wall surface 1-3, completes installation；
The ventilative method of waterproof vent valve are as follows: in use, 4 air pressure inside of the confined space drop where electronic component
Low, extraneous air is successively by opening 1-4, port 1-8, the first airflow channel 1-9, the second airflow channel 1-11, air hole
1-1, waterproof ventilated membrane 3-2, hollow core cavity 3-4 and hollow cylinder cavity 3-1 enter confined space 4；When electronic component institute
It is increased in 4 air pressure inside of confined space, it is empty that the air inside confined space 4 successively passes through hollow cylinder cavity 3-1, hollow core
Chamber 3-4, waterproof ventilated membrane 3-2, air hole 1-1, the second airflow channel 1-11, the first airflow channel 1-9 and port 1-8, through opening
Mouth 1-4 discharge；
The waterproof method of waterproof vent valve are as follows: in use, if containing aqueous vapor into the intracorporal air of valve, one
Point aqueous vapor during the first airflow channel 1-9 by condensing, from port 1-8 and opening 1-4 discharge, another part aqueous vapor into
Enter to the second airflow channel 1-11, collected after condensation by water storage tank 1-10, into air hole 1-1 aqueous vapor by waterproof and breathable component
It blocks in valve body；The temperature of heat and/or the external world that electronic component work in confined space 4 generates passes to waterproof and breathable
Valve, temperature increases in valve body 1, and the water evaporation collected in water storage tank 1-10, aqueous vapor is along the second airflow channel 1-11, the first gas
Circulation road 1-9, port 1-8, opening 1-4 discharge.
The above is only the preferred embodiment of the utility model, not does any restrictions to the utility model, all
Factually with new technique any simple modification substantially to the above embodiments, change and equivalent structural changes, still belong to
In in the protection scope of technical solutions of the utility model.
Claims (10)
1. a kind of waterproof and breathable valve, including valve body (1) and the end cap (2) being installed on the valve body (1), feature exists
In being offered air hole (1-1) on the valve body (1), be provided with waterproof and breathable component in the air hole (1-1)；
It is provided with the hollow cylinder (3) connecting with air hole (1-1) in the outside wall surface of the valve body (1), air hole (1-1),
The waterproof and breathable component is connected with hollow cylinder cavity (3-1)；
The valve body (1) includes bottom surface (1-2) and side wall surface (1-3), the cavity that bottom surface (1-2) and side wall surface (1-3) are formed
It is inside provided with single order stop water and second order stop water, offers opening (1-4) on the side wall surface (1-3).
2. a kind of waterproof and breathable valve according to claim 1, which is characterized in that the single order stop water includes two
Port (1-8) and two step pieces (1-7), two port (1-8) faces are open (1-4), the step surface of two step pieces (1-7)
Opposite and interval is arranged, and is provided with single order central part (1-5) between the step surface of two step pieces (1-7), single order central part (1-
5) two groups of screening assemblies (1-6) are provided on, every group of screening assembly (1-6) and the step surface of corresponding step piece (1-7) form the
One airflow channel (1-9), each first airflow channel (1-9) are connected to corresponding port (1-8) respectively.
3. a kind of waterproof and breathable valve according to claim 1, which is characterized in that the second order stop water includes water storage
Slot (1-10) and two baffle groups that block water；The baffle group that blocks water described in two is located at the two sides of water storage tank (1-10).
4. a kind of waterproof and breathable valve according to claim 1, which is characterized in that one end of the hollow cylinder (3) with
The outside wall surface of the bottom surface (1-2) is integrally formed, and the other end of the hollow cylinder (3) is provided with external screw thread (3-5)；Hollow posts
The diameter of body cavity (3-1) is 3mm~6mm.
5. a kind of waterproof and breathable valve according to claim 1, which is characterized in that the waterproof and breathable component includes hollow
Core (3-3), one end of hollow core (3-3) are covered with waterproof ventilated membrane (3-2)；The air hole (1-1), waterproof ventilated membrane
(3-2), hollow core cavity (3-4) are connected with hollow cylinder cavity (3-1)；It is provided on the hollow core (3-3) outer
It screw thread and is threadedly coupled with air hole (1-1).
6. a kind of waterproof and breathable valve according to claim 1, which is characterized in that the end cap (2) passes through bolt and side
Wall surface (1-3) is fixedly connected；The threaded hole (1-12) for connection end cap (2), the spiral shell are offered on the side wall surface (1-3)
The number of pit (1-12) is 5.
7. a kind of waterproof and breathable valve according to claim 2, which is characterized in that the single order central part (1-5) is fixed
In (1-2) on bottom surface, the step piece (1-7) is fixed on side wall surface (1-3)；The single order central part (1-5) is prismatoid.
8. a kind of waterproof and breathable valve according to claim 2, which is characterized in that between the screening assembly (1-6) includes
Every and three baffles disposed in parallel, one end of three baffles be fixedly connected with single order central part (1-5), three
The other end of the baffles extends to the step surface；One end that the baffles extend to the step surface is trapezoidal
Body.
9. a kind of waterproof and breathable valve according to claim 3, which is characterized in that the court of water storage tank (1-10) notch
To the opening direction for being parallel to port (1-8)；The baffle group that blocks water includes interval and successively first baffle (1- disposed in parallel
13), second baffle (1-14), third baffle (1-15) and fourth gear plate (1-16), the first baffle (1-13), second baffle
(1-14), third baffle (1-15) and fourth gear plate (1-16) form the second airflow channel (1-11)；First baffle (the 1-
13) it is connect with the side wall of water storage tank (1-10) with one end of fourth gear plate (1-16), first baffle (1-13) and fourth gear plate
The other end of (1-16) extends to the side wall surface (1-3)；The one of the second baffle (1-14) and third baffle (1-15)
End is fixedly connected with side wall surface (1-3), and the other end of second baffle (1-14) and third baffle (1-15) is to water storage tank (1-
10) side wall extends.
10. a kind of waterproof and breathable valve according to claim 3, which is characterized in that the air hole (1-1) is located at water storage
In the notch of slot (1-10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920117219.8U CN209511211U (en) | 2019-01-23 | 2019-01-23 | A kind of waterproof and breathable valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920117219.8U CN209511211U (en) | 2019-01-23 | 2019-01-23 | A kind of waterproof and breathable valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209511211U true CN209511211U (en) | 2019-10-18 |
Family
ID=68202264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920117219.8U Active CN209511211U (en) | 2019-01-23 | 2019-01-23 | A kind of waterproof and breathable valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209511211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810691A (en) * | 2020-06-04 | 2020-10-23 | 星展测控科技股份有限公司 | Waterproof valve and antenna housing |
-
2019
- 2019-01-23 CN CN201920117219.8U patent/CN209511211U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810691A (en) * | 2020-06-04 | 2020-10-23 | 星展测控科技股份有限公司 | Waterproof valve and antenna housing |
| CN111810691B (en) * | 2020-06-04 | 2022-05-17 | 星展测控科技股份有限公司 | Waterproof valve and antenna housing |
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Effective date of registration: 20230828 Address after: No. 8 Wan'an Road, Shijiuqing Village, Zhongtang Town, Binhai New Area, Tianjin, 300000 Patentee after: Konian Automation Equipment (Tianjin) Co.,Ltd. Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. Effective date of registration: 20230828 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: No.396 Gangwu Avenue, international port district, Xi'an, Shaanxi 710026 Patentee before: XI'AN RAILWAY VOCATIONAL AND TECHNICAL INSTITUTE |