CN109297347A - A kind of evaporative condenser spray system - Google Patents
A kind of evaporative condenser spray system Download PDFInfo
- Publication number
- CN109297347A CN109297347A CN201811234780.0A CN201811234780A CN109297347A CN 109297347 A CN109297347 A CN 109297347A CN 201811234780 A CN201811234780 A CN 201811234780A CN 109297347 A CN109297347 A CN 109297347A
- Authority
- CN
- China
- Prior art keywords
- spray
- spray tube
- tube
- evaporative condenser
- nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007921 spray Substances 0.000 title claims abstract description 128
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 description 5
- 210000001331 nose Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000003020 moisturizing effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
- F28F25/06—Spray nozzles or spray pipes
Abstract
A kind of evaporative condenser spray system, including header tank, water pump, spray water tank and spray tube, wherein water pump is connected between header tank and spray water tank, spray tube is connect with spray water tank, it is characterized in that, spray tube is by leading portion spray tube, middle section spray tube and back segment spray tube composition, wherein leading portion spray tube, the diameter of middle section spray tube and back segment spray tube is sequentially reduced, the bottom of three sections of spray tubes is concordantly arranged, form the eccentric reducing structure that central axis successively reduces, uniform intervals offer multiple apertures for installing nozzle to every section of spray bottom of the tube respectively.Evaporative condenser of the invention uses three sections of eccentric reducing spray tubes with spray system, and installs the nozzle of different number on spray tube to improve velocity in pipes, improves the even difference of jet expansion mass flow discrepancy.In addition, can also can reach by the way that two-way filter pipeline is arranged and not shut down operation and can clean filter screen at any time.
Description
Technical field
This patent disclosure relates generally to refrigeration equipments, and in particular to a kind of evaporative condenser spray system.
Background technique
Evaporative condenser is that a kind of water formation moisture film by spraying to coil surface exchanges heat with tube refrigerant
Equipment.Currently, the spray system of conventional evaporative condenser is made of the spray tube of several same diameters, but due to spraying
Pipe entrance, fluid flow rate and pressure are larger, and flow is also larger at nozzle, flow with along the decompression of journey aerial drainage in pipe and in managing
Friction decompression, nozzle flow gradually decreases, when to close to spray pipe end, spray velocity in pipes reduction, kinetic energy gradate for
Static pressure forms the stagnation pressure for being higher than flowing static pressure, nozzle flow is caused to increase instead.
Evaporative condenser is equipped with filter screen in header tank, and impurity, the sludge being generally used in filtering header tank prevent
Spray pump blocking, influences water spray and water quality.But equipment needs to shut down when conventional filtration net cleans, and will have a direct impact in this way
The working condition of matched other processes directly contributes certain economic loss.Without special circumstances, evaporative condenser exists
With do not allow to shut down in operational process.Poor in water quality, the area of long-term dust storm needs at high-frequency to guarantee heat transfer effect
The water quality in header tank is managed, i.e. the cleaning frequency of filter screen increases.Under the long-term running operating condition of equipment, it can be accumulated in header tank
Impurity, sludge etc., this just needs equipment neither to shut down filter screen capable of washing simultaneously.Need one kind in the non-stop-machine situation of equipment
Under, the filter device that can clean at any time.
Summary of the invention
The purpose of the invention is to overcome above-mentioned some or certain defects in the prior art, it is cold to provide a kind of vaporation-type
Condenser is with spray system (device).
Evaporative condenser spray system according to the present invention, including header tank, water pump, spray water tank and spray
Pipe, wherein water pump is connected between header tank and spray water tank, and spray tube is connect with spray water tank, and spray tube is sprayed by leading portion
Pipe, middle section spray tube and back segment spray tube composition, wherein the diameter of leading portion spray tube, middle section spray tube and back segment spray tube is successively
Reduce, the bottom of three sections of spray tubes is concordantly arranged, and forms the eccentric reducing structure that central axis successively reduces, every section of spray tube bottom
Uniform intervals are provided with multiple nozzle connections respectively in portion.
Under preferable case, leading portion spray tube bottom nozzle connector quantity is most, middle section spray tube bottom nozzle connector quantity
At least, back segment spray tube bottom nozzle connector quantity is therebetween.
Under preferable case, wherein spray tube is arranged in parallel using multiple groups, and the nozzle connection of adjacent sets spray bottom of the tube interlocks
Arrangement.
Two-way filter pipeline is arranged in parallel under preferable case, in header tank, two-way filter pipeline water inlet is respectively set
There is filter screen, valve is respectively arranged on two-way filter pipeline, the water outlet of two-way filter pipeline is connected by tee tube and water pump
It connects.
Under preferable case, filter screen is mounted on the water inlet of filter pipeline using socket mode, and is consolidated using bolt
It is fixed.
In addition, evaporative condenser spray system of the invention can also include mobile floating ball valve module, the movement is floating
Ball valve assembly is arranged in header tank, for conveniently and efficiently adjusting refill flow according to different situations.The movement floating ball valve group
Part includes sequentially connected water supply pipe, support rod and floating ball, and the junction of water supply pipe and support rod is equipped with regulating valve；Also wrap
It includes:
Adjustable plate offers vertical three parallel shifting chutes on adjustable plate, is divided into left and right shifting chute and centre is mobile
Slot；
A pair of of clamping plate is socketed in the middle part of water supply pipe, and adjustable plate is clipped in the middle, and offers on a pair of of clamping plate corresponding
Bolt hole；Handle is provided on any in a pair of of clamping plate；
Wherein, the bolt hole on a pair of of clamping plate is opposite with shifting chute left and right on adjustable plate, and water supply pipe passes through on adjustable plate
Intermediate shifting chute；
Bolt can be unclamped by a pair of of Boards wall on adjustable plate, when needing to adjust floating ball height by bolt, led to
It crosses handle to move up and down a pair of of clamping plate, so that water supply pipe and support rod and floating ball be driven to move up and down.
Conventional spray tube is adjusted to three sections of eccentric reducing spray tubes with spray system by evaporative condenser of the invention, and
The nozzle of different number is installed on spray tube to improve velocity in pipes, improves the even difference of jet expansion mass flow discrepancy.In addition,
Also it can reach by two-way filter pipeline is arranged and not shut down operation and can clean filter screen at any time.And it can also pass through setting
Floating ball valve module is moved conveniently and efficiently to adjust the refill flow in header tank according to different situations.
Detailed description of the invention
Fig. 1 is the schematic view of the front view of evaporative condenser spray system of the invention.
Fig. 2 is the planar structure schematic diagram of evaporative condenser spray system of the invention.
Fig. 3 is the mounting structure schematic diagram of filter screen in evaporative condenser spray system of the invention.
Fig. 4 is the mounting structure schematic diagram of nozzle connection in evaporative condenser spray system of the invention.
Fig. 5 is the structural schematic diagram of nozzle adapter shown in Fig. 4.
Fig. 6 is the stereochemical structure signal of the mobile floating ball valve module in evaporative condenser spray system of the invention
Figure.
Fig. 7 is the side view structure signal of the mobile floating ball valve module in evaporative condenser spray system of the invention
Figure.
Fig. 8 is that three kinds of working conditions of the mobile floating ball valve module in evaporative condenser spray system of the invention are shown
It is intended to.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
Referring to Fig. 1 and Fig. 2, evaporative condenser spray system according to the present invention includes header tank 10, water pump 20, spray
Spraying water tank 1 and spray tube.The lower section of spray water tank 1 is arranged in header tank 10, wherein the water inlet of water pump 20 and header tank 10
Connection, water outlet are connect with the water inlet 21 of spray water tank 1, and spray tube is connect with spray water tank 1, form circulated sprinkling system.
Referring specifically to Fig. 1 and 2, spray tube is made of 3 sections of spray tubes, be divided into leading portion spray tube 2, middle section spray tube 4 and after
Section spray tube 6.The diameter of three sections of spray tubes is sequentially reduced, but bottom end is in same level, thus formed central axis according to
Secondary reduced eccentric reducing structure.In a preferred embodiment, the length of three sections of spray tubes is identical.Every section of spray bottom of the tube difference is equal
It is even to be arranged at intervals with multiple nozzle connections 8, for installing nozzle 9.2 bottom nozzle connector quantity of leading portion spray tube is most, middle section
4 bottom nozzle connector minimum number of spray tube, 6 bottom nozzle connector quantity of back segment spray tube is therebetween.Although attached drawing
In the embodiment shown, spray tube is made of 3 sections of spray tubes.But in other embodiments, spray tube can also be by 3 sections or more
Spray tube composition, as long as meeting the requirement that diameter is sequentially reduced.
In the specific implementation process, three sections of spray tubes can be formed by connecting using the identical reducing round tube of three root long degree, and
In its bottom side aperture, it is used to welding tip connector 8, nozzle 9 is mounted on spray tube, nozzle 9 preferably uses ABS nozzle.
Aperture at 1 side plate of spray water tank, and one layer of groove profile washer is sticked, leading portion spray tube 2 is inserted into spray water tank 1,
Pipe cap 7 is installed in 6 end of rear end spray tube simultaneously.In addition, frame 3 can be used also to support spray tube, under concrete condition, spiral shell is used
It tethers the mode connect and connecting rod 5 is fixed on 3 inside of frame, while being entangled spray tube with U-shaped card, the mode connected with nut
U-shaped card is fixed in connecting rod 5.It is adjacent using 4 groups of spray tube parallel arrangements in the embodiment shown in Fig. 1 and 2
Nozzle connection 8 (i.e. nozzle 9) interlaced arrangement of group spray bottom of the tube.
After eccentric reducing spray tube of the invention is installed on evaporative condenser, pipe can be increased by pipe reducer
Interior flow velocity, while adjusting using the difference of different electrical path length top nozzle quantity the uniformity of nozzle exit flow distribution.?
Spray tube entrance, flow and flow velocity are larger, and the quantity for increasing nozzle can reduce flow by each nozzle exit, are spraying
Position among pipe increases velocity in pipes by reducing spray bore, and reduces nozzle quantity to improve the outlet stream of nozzle
Amount, in spray tube close to the position of latter end, although jet expansion flow increased, far away from spray tube entrance nozzle
Rate of discharge, so using the spray tube of path and reducing nozzle quantity in latter end, but nozzle number should be greater than middle section spray tube
Nozzle quantity.By the way that in conjunction with the nozzle of different number, the uniform of jet expansion flow is can be improved in eccentric reducing spray tube
Property, enhance heat transfer effect.
Referring specifically to Fig. 2, two-way filter pipeline 11 is arranged in parallel in header tank 10,11 structure of two-way filter pipeline is basic
Identical, water inlet is respectively arranged with filter screen 13, and middle part is respectively arranged with valve 12, and the water outlet of two-way filter pipeline 11 passes through
Tee tube 15 is connect with water pump 20.Referring specifically to Fig. 3, filter screen 13 is socketed in the water inlet of filter pipeline 11 using sleeve-like manner
Mouthful, and be fixed using bolt 14.After this filter device is installed on evaporative condenser, needing to clean filter screen
When, it is only necessary to the valve in respective line is closed, extracts filter screen casing out, while opening other side pipe valve.It is logical
Pipe valve is overregulated, can reach and do not shut down operation and can clean filter screen at any time, improve the requirement of water quality in header tank simultaneously
Guarantee water requirement when not shutting down operation.
The present invention also provides a kind of nozzle exchanging structures of adjustable nozzles spray angle, referring to fig. 4-5, nozzle switching
Structure includes a pair of of connection nose 51, steering base 52 and hose 56.A pair of of connection nose 51 is welded in 8 two sides of nozzle connection, is turned to
Seat 52 is arranged between two connection noses 51, and the hole on any connection nose 51 can be passed through by bolt 55, with steering base 52
Pedestal 54 is spirally connected.Steering base 52 has through-hole 53, and through-hole 53 and nozzle connection 8 are opposite, and one end of hose 56, which passes through, to be turned to
The through-hole 53 at 52 middle part of seat, set are connected on nozzle connection 8, and the other end of hose 56 is used to connect nozzle 9.When needing to adjust nozzle
When 9 spray angle, 55 are loosered a bolt, so that steering base 52 can rotate upwardly and downwardly between two connection noses 51, in this way
Hose 56 can rotate upwardly and downwardly, and the spray angle of adjustable nozzle 9 again tightens bolt 55 after waiting directions to adjust.
Nozzle with this adjustable spray angle, can make spray system of the invention in the convenience for being applicable in different coil arrangements
It is adjusted.
Currently, be automatically replenished in conventional evaporative condenser operational process by the ball-cock assembly inside header tank, but from
Dynamic refill flow is smaller, and ball-cock assembly is caused to be constantly in water compensating state, and will lead to extra rate of water make-up when equipment downtime and overflow
Water tray causes the waste significantly of water resource.
The present invention is provided with a kind of mobile floating ball valve module in the header tank 10 of evaporative condenser spray system.Ginseng
See Fig. 6-7, which mainly includes sequentially connected water supply pipe 30, support rod 38 and floating ball 41, water supply pipe
30 are equipped with regulating valve (not shown) with the junction of support rod 38；Adjusting is adjusted by movement of the floating ball 41 on liquid level
The aperture of valve, to control moisturizing liquid level, regulating valve has been common components in the prior art, its tool is no longer discussed in detail herein
Body structure.
Setting adjustable plate 36 and a pair of of clamping plate 34 at the middle part of water supply pipe 30.Wherein, it is offered on adjustable plate 36 vertical flat
Three capable rectangle shifting chutes are divided into left and right shifting chute 44 and intermediate shifting chute 45；Left and right shifting chute 44 it is of same size,
The width of intermediate shifting chute 45 is greater than left and right shifting chute.A pair of of clamping plate 34 is sleeved and fixed (such as welding) in the middle part of water supply pipe 30,
And adjustable plate 36 is clipped in the middle, corresponding bolt hole is offered on a pair of of clamping plate 34；It is set on any in a pair of of clamping plate 34
It is equipped with handle 35.
Wherein, the bolt hole on a pair of of clamping plate 34 is opposite with shifting chute 44 left and right on adjustable plate 36, and water supply pipe 30, which passes through, to be adjusted
Save the intermediate shifting chute 45 on plate 36.Left clamp 47 and right clamping plate 48 can be fixed on adjustable plate 36 by bolt 46.
In addition, mobile floating ball valve module of the invention further includes support rod limit plate 39, opened up on support rod limit plate 39
There is vertical limiting slot 40, support rod 38 passes through limiting slot 40.So that support rod 38 is moved up and down only along limiting slot 40.
When installation, by the water inlet end of water supply pipe 30 by the water inlet 22 of stainless steel corrugated flexible hose 31 and header tank 10 into
Water swivel 23 connects；It will be on adjustable plate 36 and support rod the limit plate 39 all inner wall fixed to header tank 10.
Referring to Fig. 8, when needing to adjust 41 height of floating ball, 46 are loosered a bolt, by handle 35 by a pair of of about 34 clamping plate
It is mobile, to drive water supply pipe 30 and support rod 38 and floating ball 41 to move up and down, to adjust rate of water make-up size.In rate of water make-up
When larger, support rod 38 can be driven by moving up a pair of of clamping plate 34, move down floating ball 41, increase considerably refill flow.
When refill flow reduces, a pair of of clamping plate 34 can be moved down, float position is moved up, reduce refill flow until moisturizing
Terminate, avoids having water spilling when equipment downtime.Through mobile a pair of of clamping plate in conjunction with floating ball, support rod, adjusting moisturizing can be met
The requirement of flow.
It should be appreciated by those skilled in the art that above-mentioned diagramatic content and the examples are only for explaining the invention not for right
It makes any restrictions.
Claims (5)
1. a kind of evaporative condenser spray system, including header tank, water pump, spray water tank and spray tube, wherein water pump
It is connected between header tank and spray water tank, spray tube is connect with spray water tank, which is characterized in that spray tube is sprayed by leading portion
Pipe, middle section spray tube and back segment spray tube composition, wherein the diameter of leading portion spray tube, middle section spray tube and back segment spray tube is successively
Reduce, the bottom of three sections of spray tubes is concordantly arranged, and forms the eccentric reducing structure that central axis successively reduces, every section of spray tube bottom
Uniform intervals are provided with multiple nozzle connections respectively in portion.
2. evaporative condenser spray system according to claim 1, which is characterized in that leading portion spray tube bottom nozzle
Connector quantity is most, and middle section spray tube bottom nozzle connector minimum number, back segment spray tube bottom nozzle connector quantity is between two
Between person.
3. evaporative condenser spray system according to claim 1, which is characterized in that wherein spray tube uses multiple groups
Parallel arrangement, adjacent sets spray the nozzle connection interlaced arrangement of bottom of the tube.
4. evaporative condenser spray system according to claim 1, which is characterized in that be arranged in parallel in header tank
Two-way filter pipeline, two-way filter pipeline water inlet are respectively arranged with filter screen, are respectively arranged with valve on two-way filter pipeline,
The water outlet of two-way filter pipeline is connect by tee tube with water pump.
5. evaporative condenser spray system according to claim 4, which is characterized in that filter screen uses socket mode
It is mounted on the water inlet of filter pipeline, and is fixed using bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811234780.0A CN109297347B (en) | 2018-10-23 | 2018-10-23 | Spray system for evaporative condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811234780.0A CN109297347B (en) | 2018-10-23 | 2018-10-23 | Spray system for evaporative condenser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109297347A true CN109297347A (en) | 2019-02-01 |
| CN109297347B CN109297347B (en) | 2023-11-24 |
Family
ID=65157589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811234780.0A Active CN109297347B (en) | 2018-10-23 | 2018-10-23 | Spray system for evaporative condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109297347B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066756A (en) * | 2019-06-10 | 2020-12-11 | 宁夏金圆化工有限公司 | Deep cooling device based on large-pot method for producing flake caustic soda |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202562329U (en) * | 2012-05-22 | 2012-11-28 | 北京京诚科林环保科技有限公司 | Evaporative heat exchanger |
| CN203235407U (en) * | 2013-02-07 | 2013-10-16 | 中国神华能源股份有限公司 | Slurry spraying device and installation structure thereof |
| CN204429081U (en) * | 2015-01-19 | 2015-07-01 | 大连海顺重工环保设备有限公司 | Desulfurization spray equipment |
| CN205146511U (en) * | 2015-11-25 | 2016-04-13 | 涿州市朗博科机械制造有限公司 | Spraying system with external filter |
| CN206185108U (en) * | 2016-08-31 | 2017-05-24 | 中冶赛迪工程技术股份有限公司 | Square billet secondary cooling spray set |
| CN207221679U (en) * | 2017-08-30 | 2018-04-13 | 沈阳怡森环保科技有限公司 | A kind of high-efficiency low-resistance spray equipment |
| CN207935604U (en) * | 2018-03-21 | 2018-10-02 | 邯郸宏大化纤机械有限公司 | Filature exhaust pipeline structure |
-
2018
- 2018-10-23 CN CN201811234780.0A patent/CN109297347B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202562329U (en) * | 2012-05-22 | 2012-11-28 | 北京京诚科林环保科技有限公司 | Evaporative heat exchanger |
| CN203235407U (en) * | 2013-02-07 | 2013-10-16 | 中国神华能源股份有限公司 | Slurry spraying device and installation structure thereof |
| CN204429081U (en) * | 2015-01-19 | 2015-07-01 | 大连海顺重工环保设备有限公司 | Desulfurization spray equipment |
| CN205146511U (en) * | 2015-11-25 | 2016-04-13 | 涿州市朗博科机械制造有限公司 | Spraying system with external filter |
| CN206185108U (en) * | 2016-08-31 | 2017-05-24 | 中冶赛迪工程技术股份有限公司 | Square billet secondary cooling spray set |
| CN207221679U (en) * | 2017-08-30 | 2018-04-13 | 沈阳怡森环保科技有限公司 | A kind of high-efficiency low-resistance spray equipment |
| CN207935604U (en) * | 2018-03-21 | 2018-10-02 | 邯郸宏大化纤机械有限公司 | Filature exhaust pipeline structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066756A (en) * | 2019-06-10 | 2020-12-11 | 宁夏金圆化工有限公司 | Deep cooling device based on large-pot method for producing flake caustic soda |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109297347B (en) | 2023-11-24 |
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Address after: No.458, Gongye Road, Baoshan District, Shanghai 200444 Applicant after: Shanghai Baofeng Machinery Manufacturing Co.,Ltd. Address before: No.458, Gongye Road, Baoshan District, Shanghai 200444 Applicant before: SHANGHAI BAOFENG MACHINERY MANUFACTURING Co.,Ltd. |
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