CN109253393A - A kind of machinery automatic control formula pipeline reversing arrangement - Google Patents
A kind of machinery automatic control formula pipeline reversing arrangement Download PDFInfo
- Publication number
- CN109253393A CN109253393A CN201811320038.1A CN201811320038A CN109253393A CN 109253393 A CN109253393 A CN 109253393A CN 201811320038 A CN201811320038 A CN 201811320038A CN 109253393 A CN109253393 A CN 109253393A
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- Prior art keywords
- valve
- filter screen
- threeway
- outlet
- nozzle
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
Abstract
The invention discloses a kind of machinery automatic control formula pipeline reversing arrangements, including the first valve, the second valve, third valve, the 4th valve, the first filter screen, the second filter screen, entrance threeway, the first filter screen threeway, outlet threeway, the second filter screen threeway, difference gauge, inlet flange and outlet(discharge) flange.There are two types of switch states for first valve, the second valve, third valve, the 4th valve: the first valve of a. and third valve are opened, and the second valve and the 4th valve close；B. the first valve and third valve close, and the second valve and the 4th valve are opened；Both switch states just correspond to fluid two kinds of portion flow directions in the device.Two measuring points of difference gauge are separately positioned near inlet flange and outlet(discharge) flange, the pressure difference that difference gauge measures can increase with the increasing for impurity that filter screen filtration is accumulated, when pressure difference is greater than certain value, indicate that four valve transfer switch states make flowing commutate, fluid portion's back flush impurity and is taken away in the device.
Description
Technical field
The present invention relates to connecting pipe field, specifically a kind of machinery automatic control formula pipeline reversing arrangement.
Background technique
Cooling water usually needs filtration treatment before entering heat exchanger, and industrially common y-type filter is filtered, but Y
Type filter needs to dismantle and clear up impurity foul therein after filtering a period of time, when cooling water contains more impurity, clearly
Frequently, and when cleaning y-type filter, cooling water needs to disconnect reason, this relies on the equipment of heat exchanger for continuous work, extremely
For influence very much its service performance；Heat exchanger needs continuous work, and when being not allow for impurity and entering, uses water purification sometimes
Supply equipment carries out real-time filter operation, but the device is complicated, and economic input is big.
In addition, some pump conveyance capacities are not strong, card master is easy when encountering the impurity of bulky grain, but pump under certain usage scenarios
It is continuous operation, can not shuts down to clear up the impurity that pump intake filters down.
Summary of the invention
The purpose of the present invention is to provide a kind of machinery automatic control formula pipeline reversing arrangements, to solve in the prior art ask
Topic.
To achieve the above object, the invention provides the following technical scheme:
A kind of machinery automatic control formula pipeline reversing arrangement, including the first valve, the second valve, third valve, the 4th valve,
One filter screen, entrance threeway, the first filter screen threeway, outlet threeway, the second filter screen threeway, difference gauge, enters the second filter screen
Mouth flange and outlet(discharge) flange, inlet flange are device portal, and outlet(discharge) flange is device outlet.
Further, the first valve, the second valve, third valve, the 4th valve, the first filter screen, the second filter screen, enter
Mouth threeway, the first filter screen threeway, outlet threeway, the second filter screen threeway pass through piping connection together；First valve one end
Connect entrance threeway a nozzle, the other end connect the second filter screen threeway a nozzle, second valve one end connect into
One nozzle of mouth threeway, the other end connect a nozzle of the first filter screen threeway, the connection outlet threeway of third valve one end
A nozzle, the other end connect the first filter screen threeway a nozzle, one of the 4th valve one end connection outlet threeway
Nozzle, the other end connect a nozzle of the second filter screen threeway, and the third nozzle of entrance threeway connects inlet flange, outlet
The third nozzle of the third nozzle connection outlet flange of threeway, the first filter screen threeway connects the first filter screen, the second mistake
The third nozzle of strainer threeway connects the second filter screen.
Inlet pipeline has two, and outlet pipeline has two, meets the needs of pipeline selection commutation, two filter screens in structure
Filter operation is realized respectively in two kinds of flow directions, and the same time only has a kind of flow direction, only one filter screen is in running order.
When first filter screen is connected to import, i.e. when the second valve opening, third valve are closed, the first filter screen carries out the mistake of device water inlet
Filter operation, when the second filter screen is connected to import, i.e. when the first valve opening, the 4th valve are closed, the second filter screen carries out device
The filter operation of water inlet.
Further, a measuring point of difference gauge is arranged on the pipeline between inlet flange and entrance threeway, difference gauge
Another measuring point be arranged in outlet(discharge) flange and export threeway between pipeline on.Difference gauge measures the pressure between the two measuring points
Difference, to provide parameter for subsequent operation, the pressure difference value of the two measuring points can embody the resistance situation inside device, interior
Portion's resistance is bigger, and the pressure difference value of the two points is bigger, and difference herein is absolute value, without point in direction.Internal drag meeting
The impurity to get off with the first filter screen or the second filter screen filtration increases and increases.
First filter screen threeway and the second filter screen threeway are reducer tee, the first filter screen threeway and the second filter screen three
Logical bye-pass nominal diameter is identical as the nominal diameter of other component in device, the first filter screen threeway and the second filter screen three
Logical main line nominal diameter is bigger than the nominal diameter of other component in device~shelves, the first filter screen threeway and the second filter screen
The bye-pass of threeway is horizontally disposed, and main line is arranged vertically, and the bye-pass of the first filter screen threeway connects the second valve, the second mistake
The bye-pass of strainer threeway connects the first valve.First filter screen threeway and the second filter screen threeway use the reducing three of " big tripe "
It is logical, more impurity can be accommodated compared with small-bore equal tee.The branch pipe of first filter screen threeway and the second filter screen threeway
Road is horizontally disposed and the bye-pass of the first filter screen threeway connects the second valve, the bye-pass connection first of the second filter screen threeway
Valve can allow impurity not fall out in discharge to the first valve and the second valve, so that impurity discharge is insufficient.
Further, there are two types of switch states: the first valve of a. for the first valve, the second valve, third valve, the 4th valve
It is opened with third valve, the second valve and the 4th valve close；B. the first valve and third valve close, the second valve and the 4th valve
It opens；First valve, the second valve, third valve, the switch state of the 4th valve and difference gauge progress are chain, and difference gauge measures
Pressure difference be more than setting value when, the first valve, the second valve, third valve, the 4th valve switch state exchange.
Two kinds of switch state, that is, corresponding intruments, two kinds of flow directions of four valves: the first valve of a. and third valve
It opens, when the second valve and the 4th valve close, the flow direction of fluid are as follows: the-the second filter screen of the-the first valve of inlet flange-" uses
Equipment " (heat exchanger etc.) the-the first filter screen-third valve-outlet(discharge) flange；B. the first valve and third valve close, the second valve
When being opened with the 4th valve, the flow direction of fluid are as follows: the-the first filter screen of the-the second valve of inlet flange-" using equipment " (heat exchange
Device etc.)-the second the-the four valves of filter screen-outlet(discharge) flange.Such external water equipment need to be to water (flow) direction without limitation.Differential pressure
The setting value of meter is the centre that two measuring points free from admixture pressure difference value and impurity when device uses accumulate pressure difference value when expiring
Value, can thus carry out switching operation when about impurity accumulates half, and switching operation is left to rinse the impurity of accumulation
Device: when flow direction be it is above-mentioned flow to a when, impurity is got off by the second filter screen filtration, when flow direction, which is switched to, flows to b, stream
Body is carried away by the flow from the second filter screen, the impurity of the second filter screen accumulation is flowed counterflow through, the first filter screen filtration in this flow direction
The water flow that the impurity to get off can be flowed to a is taken away, and loops back and forth like this, and continuous progress switching operation is miscellaneous continuously to filter
Matter.
When " use equipment " has particular requirement to fluid flow direction, such as using device as when the ingress filtering device pumped,
Since the inlet and outlet of pump cannot overturn use, thus two connectors of device and pump need to flow to it is constant, at this moment can be by two
Set above-mentioned apparatus is applied in combination, and carries out secondary commutation, totally eight valves of two covering devices interlock jointly, have both been able to achieve filtering function
Can, and the flow direction for being able to achieve four external interfaces does not change.
Further, the first valve, the second valve, third valve, the 4th valve use butterfly valve.It can be enhanced using butterfly valve
The conveyance capacity of valve is not easy leak stopping when coping with impurity containing fluid compared with ball valve etc..
The screen meshes diameter of first filter screen and the second filter screen is 0.5~4mm.The more big then mistake of the sieve diameter of strainer
The impurity particle degree filtered is bigger, and mesh size is smaller, and the impurity particle degree filtered down is smaller, but too small mesh size
Filter screen flow resistance can be very big, there are many flow losses, suitable strainer precision selected according to external equipment, for heat exchanger
Etc. equipment can take smaller value, for pump etc. equipment can take the larger value.
The beneficial effects of the present invention are: heat exchanger cooling water tube road or pumped medium need filter pump into
Continuously continual it can be filtered operation using the present invention on outlet pipeline, filtering accuracy is controllable, reliable to guarantee heat exchange
The continuous use of device or pump.
Detailed description of the invention
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail.
Fig. 1 is a kind of flow diagram of machinery automatic control formula pipeline reversing arrangement of the present invention；
Fig. 2 is perspective view of the invention；
Fig. 3 is the flow diagram that two circuits parts of the invention are applied in combination；
Fig. 4 is the perspective view that two circuits parts of the invention are applied in combination.
In figure: the first valve of 1-, the second valve of 2-, 3- third valve, the 4th valve of 4-, the first filter screen of 5-, 6- second
Filter screen, the threeway of 21- entrance, the threeway of the first filter screen of 22-, 23- outlet threeway, the threeway of the second filter screen of 24-, 25- difference gauge,
31- inlet flange, 32- outlet(discharge) flange.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1 and Figure 2, machinery automatic control formula pipeline reversing arrangement includes the first valve 1, the second valve 2, third valve
3, the 4th valve 4, the first filter screen 5, the second filter screen 6, entrance threeway 21, the first filter screen threeway 22, outlet threeway 23, the
Two filter screen threeways 24, difference gauge 25, inlet flange 31 and outlet(discharge) flange 32, inlet flange 31 are device portal, outlet(discharge) flange
32 export for device.
First valve 1, the second valve 2, third valve 3, the 4th valve 4, the first filter screen 5, the second filter screen 6, entrance
Threeway 21, the first filter screen threeway 22, outlet threeway 23, the second filter screen threeway 24 pass through piping connection together；First valve
One nozzle of 1 one end of door connection entrance threeway 21, the other end connect a nozzle of the second filter screen threeway 24, the second valve
2 one end connect a nozzle of entrance threeway 21, and the other end connects a nozzle of the first filter screen threeway 22, third valve 3
One nozzle of one end connection outlet threeway 23, the other end connect a nozzle of the first filter screen threeway 22, the 4th valve 4 one
A nozzle of connection outlet threeway 23 is held, the other end connects a nozzle of the second filter screen threeway 24, entrance threeway 21
Third nozzle connects inlet flange 31, exports the third nozzle connection outlet flange 32 of threeway 23, the first filter screen threeway
22 third nozzle connects the first filter screen 5, and the third nozzle of the second filter screen threeway 24 connects the second filter screen 6.
Inlet pipeline is divided into two, and outlet pipeline is divided into two, and the first filter screen 5 and the second filter screen 6 are flowed at two kinds
It is upper to realize filter operation respectively.The same time only has a kind of flow direction, only one filter screen is in running order.First filter screen
When 5 connection inlet flange 31, i.e. when the second valve 2 is opened, third valve 3 is closed, the first filter screen 5 carries out the mistake of device water inlet
Filter operation, when the second filter screen 6 is connected to inlet flange 31, i.e. when the first valve 1 is opened, the 4th valve 4 is closed, the second filter screen
6 carry out the filter operation of device water inlet.
One measuring point of difference gauge 25 is arranged on the pipeline between inlet flange 31 and entrance threeway 21, difference gauge 25
Another measuring point is arranged in outlet(discharge) flange 32 and exports on the pipeline between threeway 23.Difference gauge measures the pressure between the two measuring points
Power difference provides parameter for subsequent operation, and the pressure difference value of the two measuring points embodies the resistance situation inside device, internal drag
Bigger, the pressure difference value of the two points is bigger.Internal drag can be filtered down with the first filter screen 5 or the second filter screen 6
Impurity increases and increases.
As shown in Fig. 2, the first filter screen threeway 22 and the second filter screen threeway 24 are reducer tee, the first filter screen threeway
22 and second filter screen threeway 24 bye-pass nominal diameter it is identical as the nominal diameter of other component in device, the first filter screen
The main line nominal diameter of threeway 22 and the second filter screen threeway 24 is 1~3 grade bigger than the nominal diameter of other component in device, the
The bye-pass of one filter screen threeway 22 and the second filter screen threeway 24 is horizontally disposed, and main line arranges the first filter screen threeway vertically
22 bye-pass connects the second valve 2, and the bye-pass of the second filter screen threeway 24 connects the first valve 1.First filter screen threeway
22 and second filter screen threeway 24 use the reducer tee of " big tripe ", can be accommodated compared with small-bore equal tee more miscellaneous
Matter.The bye-pass of first filter screen threeway 22 and the second filter screen threeway 24 is horizontally disposed and the branch pipe of the first filter screen threeway 22
Road connects the second valve 2, and the bye-pass of the second filter screen threeway 24, which connects the first valve 1, can allow impurity to will not fall in discharge
The first valve 1 and the second valve 2 are dropped down onto, so that impurity discharge is insufficient.
8, a kind of machinery automatic control formula pipeline reversing arrangement according to claim 4, it is characterised in that: the first valve 1, second
Valve 2, third valve 3, there are two types of switch states for the 4th valve 4: the first valve of a. 1 and third valve 3 are opened, 2 He of the second valve
4th valve 4 closes；B. the first valve 1 and third valve 3 close, and the second valve 2 and the 4th valve 4 are opened；First valve 1, the second valve
Door 2, third valve 3, the switch state of the 4th valve 4 and difference gauge 25 carry out chain, and the pressure difference that difference gauge 25 measures surpasses
When crossing setting value, the switch state exchange of the first valve 1, the second valve 2, third valve 3, the 4th valve 4.
As shown in Figure 1, two kinds of switch state, that is, corresponding intruments, two kinds of flow directions of four valves: the first valve of a. 1
It is opened with third valve 3, when the second valve 2 and the 4th valve 4 close, the flow direction of fluid are as follows: the first valve of inlet flange 31- 1-
Second filter screen 6- " using equipment " (heat exchanger etc.)-the first filter screen 5- third valve 3- outlet(discharge) flange 32；B. the first valve 1
It is closed with third valve 3, when the second valve 2 and the 4th valve 4 are opened, the flow direction of fluid are as follows: the second valve of inlet flange 31- 2-
The 4th valve 4- outlet(discharge) flange 32 of first filter screen 5- " using equipment " (heat exchanger etc.)-the second filter screen 6-.It is such external
Water equipment need to be to water (flow) direction without limitation.The setting value of difference gauge 25 is two measuring points free from admixture pressure difference when device uses
The median of pressure difference value when value and full impurity accumulation, thus can carry out switching operation when about impurity accumulates half,
Switching operation in order to by accumulation impurity rinse separating device: when flow direction be it is above-mentioned flow to a when, impurity is by the second filter screen
6 filter down, and when flow direction, which is switched to, flows to b, fluid is from flowing counterflow through the second filter screen 6, the impurity of the second filter screen 6 accumulation
It is carried away by the flow, while flowing to the impurity that the first filter screen 5 filters down in b and can be flowed to the water flow of a and taking away, so recycle past
Multiple, the continuous switching operation that carries out is with continuous impurity screening.
When " use equipment " has particular requirement to fluid flow direction, such as using device as when the ingress filtering device pumped,
Since the inlet and outlet of pump cannot overturn use, thus two connectors of device and pump need to flow to it is constant, at this moment can be by two
Set above-mentioned apparatus is applied in combination, and carries out secondary commutation, totally eight valves of two covering devices interlock jointly, have both been able to achieve filtering function
Can, and the flow direction for being able to achieve four external interfaces does not change.
First valve 1, the second valve 2, third valve 3, the 4th valve 4 use butterfly valve.Butterfly valve is compared with on-off valves such as ball valves
There is better conveyance capacity, is not easy leak stopping when coping with impurity containing fluid.
The screen meshes diameter of first filter screen 5 and the second filter screen 6 is 0.5~4mm.Too small sieve diameter filters effect
Fruit is bad, and then flow resistance is too big for too small sieve diameter, and the equipment screen meshes high for water quality requirements such as heat exchangers are straight
Diameter can take smaller value, and the occasion for pump water inlet filtering can take the larger value.
Inlet flange 31 is connect into external water inlet when use, outlet(discharge) flange 32 connects external water outlet, the first filter screen 5 and the second mistake
Strainer 6 it is external one flank intake-outlet " using equipment ", outside water inlet enters device from inlet flange 31, after device
" using equipment " is reached, then return mechanism, then is left from the outlet(discharge) flange 32 of device.Impurity in the water inlet of outside is by device mistake
It filters without entering " using equipment ", water outlet can be followed together from 32 separating device of outlet(discharge) flange again after impurity.For
When pump water inlet filtering, device is applied in combination, makes water (flow) direction commutation twice, i.e., " inside commutation filtering-external flow direction is not
Become ".
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (7)
1. a kind of machinery automatic control formula pipeline reversing arrangement, it is characterised in that: the machinery automatic control formula pipeline reversing arrangement includes the
One valve (1), third valve (3), the 4th valve (4), the first filter screen (5), the second filter screen (6), enters the second valve (2)
Mouth threeway (21), the first filter screen threeway (22), outlet threeway (23), the second filter screen threeway (24), difference gauge (25), entrance
Flange (31) and outlet(discharge) flange (32), the inlet flange (31) are device portal, and the outlet(discharge) flange (32) is device outlet.
2. a kind of machinery automatic control formula pipeline reversing arrangement according to claim 1, it is characterised in that: first valve
(1), the second valve (2), third valve (3), the 4th valve (4), the first filter screen (5), the second filter screen (6), entrance threeway
(21), the first filter screen threeway (22), outlet threeway (23), the second filter screen threeway (24) pass through piping connection together；Institute
A nozzle of the first valve (1) one end connection entrance threeway (21) is stated, the other end connects the one of the second filter screen threeway (24)
A nozzle, a nozzle of the second valve (2) one end connection entrance threeway (21), the other end connect the first filter screen threeway
(22) a nozzle, a nozzle of third valve (3) one end connection outlet threeway (23), the other end connect the first mistake
One nozzle of strainer threeway (22), a nozzle of the 4th valve (4) one end connection outlet threeway (23), the other end connect
A nozzle of the second filter screen threeway (24) is connect, the third nozzle of the entrance threeway (21) connects inlet flange (31),
The third nozzle connection outlet flange (32) of outlet threeway (23), the third pipe of the first filter screen threeway (22)
The third nozzle of mouth connection the first filter screen (5), the second filter screen threeway (24) connects the second filter screen (6).
3. a kind of machinery automatic control formula pipeline reversing arrangement according to claim 2, it is characterised in that: the difference gauge (25)
A measuring point be arranged on pipeline between inlet flange (31) and entrance threeway (21), another measuring point of difference gauge (25)
It is arranged on the pipeline between outlet(discharge) flange (32) and outlet threeway (23).
4. a kind of machinery automatic control formula pipeline reversing arrangement according to claim 3, it is characterised in that: first filter screen
Threeway (22) and the second filter screen threeway (24) are reducer tee, the first filter screen threeway (22) and the second filter screen threeway (24)
Bye-pass nominal diameter it is identical as the nominal diameter of remaining part in device, the first filter screen threeway (22) and the second filter screen
The main line nominal diameter of threeway (24) is 1~3 grade bigger than the nominal diameter of remaining part in device, the first filter screen threeway
(22) and the bye-pass of the second filter screen threeway (24) is horizontally disposed, and main line is arranged vertically, the first filter screen threeway
(22) bye-pass connects the second valve (2), and the bye-pass of the second filter screen threeway (24) connects the first valve (1).
5. a kind of machinery automatic control formula pipeline reversing arrangement according to claim 4, it is characterised in that: first valve
(1), there are two types of switch states: the first valve of a. (1) and third valve for the second valve (2), third valve (3), the 4th valve (4)
(3) it opens, the second valve (2) and the 4th valve (4) close；B. the first valve (1) and third valve (3) close, the second valve (2) and the
Four valves (4) are opened；First valve (1), the second valve (2), third valve (3), the switch state of the 4th valve (4) and poor
Pressure meter (25) carry out it is chain, when the pressure difference that the difference gauge (25) measures is more than setting value, first valve (1), the
The switch state exchange of two valves (2), third valve (3), the 4th valve (4).
6. a kind of machinery automatic control formula pipeline reversing arrangement according to claim 5, it is characterised in that: first valve
(1), the second valve (2), third valve (3) and the 4th valve (4) are butterfly valve.
7. a kind of machinery automatic control formula pipeline reversing arrangement according to claim 5, it is characterised in that: first filter screen
(5) and the screen meshes diameter of the second filter screen (6) is 0.5~4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811320038.1A CN109253393B (en) | 2018-11-07 | 2018-11-07 | Mechanical self-control type pipeline reversing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811320038.1A CN109253393B (en) | 2018-11-07 | 2018-11-07 | Mechanical self-control type pipeline reversing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109253393A true CN109253393A (en) | 2019-01-22 |
| CN109253393B CN109253393B (en) | 2020-03-17 |
Family
ID=65043458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811320038.1A Active CN109253393B (en) | 2018-11-07 | 2018-11-07 | Mechanical self-control type pipeline reversing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN109253393B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905857A (en) * | 2019-12-04 | 2020-03-24 | 黄旭平 | Cooling and heat dissipating device for centrifugal pump |
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| CN110905857A (en) * | 2019-12-04 | 2020-03-24 | 黄旭平 | Cooling and heat dissipating device for centrifugal pump |
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| Publication number | Publication date |
|---|---|
| CN109253393B (en) | 2020-03-17 |
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Effective date of registration: 20230814 Address after: 230000 b-1018, Woye Garden commercial office building, 81 Ganquan Road, Shushan District, Hefei City, Anhui Province Patentee after: HEFEI WISDOM DRAGON MACHINERY DESIGN 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: 20230814 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: 213164 No. 22, Ming Xin Road, Wujin science and Education City, Changzhou, Jiangsu Patentee before: CHANGZHOU College OF INFORMATION TECHNOLOGY |