CN103527371A - Full-automatic backwash filter - Google Patents
Full-automatic backwash filter Download PDFInfo
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- CN103527371A CN103527371A CN201310542709.XA CN201310542709A CN103527371A CN 103527371 A CN103527371 A CN 103527371A CN 201310542709 A CN201310542709 A CN 201310542709A CN 103527371 A CN103527371 A CN 103527371A
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Abstract
The invention relates to a full-automatic backwash filter. The full-automatic backwash filter comprises a tubular barrel and a lower barrel, wherein a tubular filter element is arranged in the barrel, and a cleaning rotating shaft is arranged in the filter element; the filter element is composed of a tubular inner mesh plate, a tubular outer mesh plate and a foldable filter screen; a left scraping plate and a right scraping plate are symmetrically arranged on the cleaning rotating shaft, wherein the left scraping plate is provided with a cleaning groove, the cleaning groove stretches deep into the left scraping plate in the radial direction of the cleaning rotating shaft to form a flow passage, and the cleaning groove is communicated with a tubular shaft at the lower end of the cleaning rotating shaft; an opening of the cleaning groove makes contact with the inner mesh plate of the filter element. According to the full-automatic backwash filter, the structural design of the fixed filter element and the cleaning rotating shaft is adopted, the running torque of the cleaning rotating shaft is quite small, the opening of the cleaning groove in the left scraping plate is an inverted horn-shaped opening, a divergent nozzle design in fluid dynamics is adopted, differential pressure inside and outside the filter element is fully utilized, so that the flow velocity of cleaning fluid is increased, and the cleaning effect is improved effectively; the service life of the filter element can be effectively prolonged, and the maintenance cost of the filter in a later period is lowered substantially.
Description
Technical field
The invention belongs to the technical field of fuel oil secondary filter equipment, be specifically related to the fuel strainer of marine engine.
Background technique
At present, because considering Economy, the use of poor quality fuel oil (heavy oil) on marine engine becomes inexorable trend, trend along with the maximization of boat diesel engine, user is to the range of flow of fuel filter, precision grade and working life etc. requiring more and more higher, simultaneously in order to guarantee the continuity of vessel motion, bunker oil filter generally adopts design that can auto-flushing.The automatic cleaning of fuel filter generally adopts isolation to clean and two kinds of forms of continuous wash, front a kind of form is used early, but the switching motion that has interrupter in actual cleaning process, easily cause the discontinuity of fuel delivery, easy entrained air in fuel oil supply system during isolation action simultaneously, affect the supply quality of diesel engine fuel oil, rear a kind of formal cause is without isolation switching motion, cleaning can be carried out continuously, impact on fuel oil supply system is less, is that current fuel oil is from the development trend of secondary cleaner.Its basic principle of fuel oil auto-flushing filter of the continuous wash of using at present is all that the mobile direction of filter oil is from filter core external-to-internal, filter core dirty when stifled the cleaning point by washing unit and filter core contact and make the local pressure reduction of generation outside the inner and filter of filter core, produce and the reverse fluid of fuel oil filtering direction, to reach the effect of filter cartridge flushing, then pass through rotating filter element more than one week, repeatedly repeat to rinse action, reached the effect of rinsing whole filter core.The fuel oil auto-flushing filter of at present such continuous wash, filter core rotates in cleaning process, and for guaranteeing that the rotation of filter core must arrange filter shaft and supporting frame on filter cartridge construction, complicated filter cartridge construction can be given and manufacture suitable difficulty; Simultaneously because the large scale development trend of diesel engine makes the requirement of filter core effective discharge more and more large, filter core size also has to correspondingly strengthen, increase along with filter core diameter, the size that need to strengthen supporting member could meet the structural strength requirement of filter core, but the increasing of support member will inevitably make effective flux of filter core reduce, in order to improve effective discharge, must increase filter core size again, cause a kind of vicious circle in structural design; Moreover the increase that can cause sealing surface along with the increase of filter core size is had relatively high expectations to sealing material, the running clearance of filter core will correspondingly amplify simultaneously.The temperature difference of the different oil products of bunker oil is 100 ℃ of left and right, and the rotary gap of filter core is difficult to take into account the hot and difference of cold conditions because expanding with heat and contract with cold and producing, and can cause easily string oil of cold conditions lower filter turnover, has a strong impact on filtering effect; The increase of filter core size also can increase the resistance of filter core rotation simultaneously, directly affects the size of filter core driving mechanism.In sum, use at present the fuel filter of maximum continuous wash because the structural limitations of its rotating filter element, ubiquity filter cartridge construction is complicated, Scantlings is large compared with large, little, the easy generation string oil of filter core effective discharge (absolute oil can not effectively be isolated with sump oil), running torque, without the cleaning point of temperature compensation and washing unit and filter core, contact to cause the defects such as filter core damage.
Summary of the invention
In order to realize, guaranteeing under the prerequisite constant to the grade of filter filtering traffic, by the fuel filter miniaturization of continuous wash, simplify the structure, summary is safeguarded in assembling, the invention provides a kind of Full automatic backwashing filter.
Full automatic backwashing filter, comprises cylindrical shell and the lower cylinder body of circular tube shaped, is provided with the filter core of circular tube shaped in cylindrical shell, is provided with cleaning rotating shaft in filter core, and the upper end of cylindrical shell is provided with upper cover, and lower end is provided with lower cover, covers under described and offers four fan-shaped runner imports; The upper end of cleaning rotating shaft extends outside upper cover, and lower end extends in lower cylinder body through lower cover; The sidewall at described cylindrical shell middle part is provided with filter outlet; Described lower cylinder body is the cylindrical body of upper end open lower end closed, and the sidewall of lower cylinder body is provided with filter import, and the lower axial end of cylindrical shell is connecting the upper end of lower cylinder body;
In the cylindrical shell corresponding with lower cover, lower end mouth place is provided with the seal ring seat of ring-type, between the external cylindrical surface of seal ring seat and the inner cylindrical surface of cylindrical shell, be provided with seal ring, the lower end of described filter core is positioned in seal ring seat, and the upper end of filter core is fixed at upper end-hole place in cylindrical shell by retaining ring; Described filter core is comprised of the interior mesh plate of circular tube shaped, the outer mesh plate of circular tube shaped and folding filter screen, and folding filter screen is between interior mesh plate and outer mesh plate;
In cleaning rotating shaft in cylindrical shell, be arranged with left scraper plate and right scraper plate, left scraper plate and right scraper plate are in same plane; Between the upper end of cleaning rotating shaft and upper cover, by bearing and upper bearing bracket, coordinate, the lower end of cleaning rotating shaft is tubular axis, and by lower bearing, coordinates between lower cover; On described left scraper plate, offer cleaning tank; Described cleaning tank with clean the axially equidirectional of rotating shaft, cleaning tank along clean rotating shaft radially go deep in left scraper plate, form runner, and be communicated with the tubular axis that cleans rotating shaft lower end; The notch of cleaning tank is positioned at the outboard end of left scraper plate, and contacts with the interior mesh plate of filter core; The middle part of right scraper plate is provided with the radially circular arc of indent, and the outer end, top of the right scraper plate being connected with described circular arc two ends and outer end, bottom form locating bump, the rectangular bulk of described locating bump, and contact with the interior mesh plate of filter core; Bottom in lower cylinder body is provided with upright columned connecting base, connecting base internal upper part is provided with the cleaning runner of blind hole shape, the tubular axis that cleans rotating shaft lower end is plugged in and cleans in runner, and the lower end of described cleaning runner is being communicated with one end of back washing transverse tube, and the other end of back washing transverse tube extends lower cylinder body outside; The bottom of connecting base is provided with the inner groovy to fovea superior, and bottom in described inner groovy and lower cylinder body is communicated with, and the lower cylinder body bottom corresponding with the inner groovy of connecting base is provided with puts residual outlet, puts residual outlet and is being communicated with and puts residual pipe, puts residual pipe and is positioned at lower cylinder body outside.
The cross section of described cleaning tank is strip, and the notch of cleaning tank is the outer little interior large horn mouth that falls, and groove depth is 50～100mm, and groove width is 15mm, and width of rebate is 6mm.
Between the external cylindrical surface of described seal ring seat and the inner cylindrical surface of cylindrical shell, be provided with two seals circle.
Useful technique effect of the present invention embodies in the following areas:
1. the present invention adopts fixedly filter core and the structural design of cleaning rotating shaft, the little order of magnitude of area of contact due to the rotating contact Area Ratio filter core rotational structure between the left scraper plate, right scraper plate and the filter core inwall that clean in rotating shaft, so it is very little to clean the running torque of rotating shaft, driving mechanism is easy to clean the accurate control of some position, can effectively promote cleaning performance;
2. the present invention passes through architecture advances, make filter oil realize the flow direction from inside to outside, like this when carrying out the maintenance clean of filter core, be convenient to adopt high pressure air internally to rinse from outer, compared with traditional easy operating of flushing from inside to outside, cleaning performance is better, can effectively extend the working life of filter core, significantly reduces the later maintenance cost of filter;
3. the present invention has changed traditional filter core sealing means, adopted upper plane end face seal, sealing is simply easy to make assembling, bottom adopts the seal ring seat structure of ring-type to realize floating type "O"-ring sealing, twice " O " RunddichtringO is effectively isolated absolute oil and sump oil altogether, the temperature correction of "O"-ring sealing is good, precision is guaranteed by machining apparatus, the lower end of filter core is non-stationary structure simultaneously, can vary with temperature free-extension, efficiently solve the adaptability of filter to different oil product temperature;
4. the present invention has improved the structure of filter core, adopted folding stainless steel filtering net, plane filter element of filter screen structure filter area with respect to equivalent diameter has improved more than 5 times, even if service precision does not need to increase up to the filter screen filter size of 10um, interior mesh plate and the outer mesh plate of filter core have all adopted stainless (steel) wire orifice plate, interior mesh plate and outer mesh plate are as the supporting structure of filter core, this structure has lightweight, intensity is high, welding procedure is simple, precision easily guarantees, effectively discharge value is large and be easy to the advantages such as cleaning, in actual installation, in maintainability dismounting and filter element cleaning operation, can effectively avoid filter screen to be subject to improper damage,
5. on the left scraper plate of the present invention, the notch of cleaning tank, for falling horn mouth, has adopted the divergent nozzle design on hydrokinetics, makes full use of the inside and outside pressure reduction of filter core, improves the flow velocity of washing fluid, and cleaning performance is better than uniform section runner.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is working principle schematic diagram of the present invention.
Fig. 3 is that the upper left scraper plate of Fig. 2 and right scraper plate turn over 90 degree view.
Fig. 4 is the A-A sectional view of Fig. 3.
Fig. 5 is the stereogram of rotating shaft.
Fig. 6 is the sectional block diagram of Fig. 5.
Sequence number in upper figure: lower cylinder body 1, put residual pipe 2, back washing transverse tube 3, seal ring 4, cylindrical shell 5, upper cover 6, upper bearing bracket 7, left scraper plate 8, right scraper plate 9, bleed valve 10, filter core 11, filter outlet 12, clean rotating shaft 13, filter import 14, lower bearing 15, connecting base 16, folding filter screen 17, interior mesh plate 18, notch 19, outer mesh plate 20, locating bump 21, put residual outlet 22.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the present invention is further described.
Referring to Fig. 1 and Fig. 2, Full automatic backwashing filter comprises cylindrical shell 5 and the lower cylinder body 1 of circular tube shaped, is provided with the filter core 11 of circular tube shaped in cylindrical shell 5, is provided with and cleans rotating shaft 13 in filter core 11, and the upper end of cylindrical shell 5 is provided with upper cover 6, and lower end is provided with lower cover; Under cover and offer four fan-shaped runner imports, and bleed valve 10 is installed.The upper end of cleaning rotating shaft 13 extends outside upper cover 6, and lower end extends in lower cylinder body 1 through lower cover.On the sidewall at cylindrical shell 5 middle parts, offer filter outlet 12.Lower cylinder body 1 is the cylindrical body of upper end open, lower end closed, offers filter import 14 on the sidewall of lower cylinder body 1, and the lower axial end of cylindrical shell 5 is connecting the upper end of lower cylinder body 1.
The cylindrical shell 5 interior lower end mouth place corresponding with lower cover is provided with the seal ring seat of ring-type, two seals circle 4 is installed between the inner cylindrical surface of the external cylindrical surface of seal ring seat and cylindrical shell 5, the lower end of filter core 11 is positioned in seal ring seat, and the upper end of filter core 11 is fixedly installed in the interior upper end-hole of cylindrical shell 5 place by retaining ring.The integral body that filter core 11 is comprised of the interior mesh plate 18 of circular tube shaped, the outer mesh plate 20 of circular tube shaped and folding filter screen 17, folding filter screen 17 is between interior mesh plate 18 and outer mesh plate 20.
In cleaning rotating shaft 13 in cylindrical shell 5, be arranged with left scraper plate 8 and right scraper plate 9, left scraper plate 8 and right scraper plate 9 are in same plane; Between the upper end of cleaning rotating shaft 13 and upper cover 6, by bearing and upper bearing bracket 7, coordinate, the lower end of cleaning rotating shaft 13 is tubular axis, and by lower bearing 15, coordinates between lower cover.Referring to Fig. 5 and Fig. 6, on left scraper plate 8, offer cleaning tank; Described cleaning tank is axially equidirectional with cleaning rotating shaft 13, and cleaning tank radially gos deep in left scraper plate 8 along cleaning rotating shaft 13, and is being communicated with the tubular axis that cleans rotating shaft 13 lower ends; The cross section of cleaning tank is strip, and the notch of cleaning tank is the outer little interior large horn mouth that falls, and groove depth is 70mm, and groove width is 15mm, and width of rebate is 6mm; The notch 19 of cleaning tank is positioned at the outboard end of left scraper plate 8, and contacts with the interior mesh plate 18 of filter core.The middle part of right scraper plate 9 is provided with the radially circular arc of indent, and the outer end, top of the right scraper plate 9 being connected with described circular arc two ends and outer end, bottom form locating bump 21, the rectangular bulk of described locating bump 21, and contact with the interior mesh plate 18 of filter core; Bottom in lower cylinder body 1 is provided with upright columned connecting base 16, connecting base 16 internal upper parts offer the cleaning runner of blind hole shape, the tubular axis that cleans rotating shaft 13 lower ends is inserted into and cleans in runner, the lower end of cleaning runner is being communicated with one end of back washing transverse tube 3, and the other end of back washing transverse tube 3 extends lower cylinder body 1 outside; The bottom of connecting base 16 is provided with the inner groovy to fovea superior, bottom in inner groovy and lower cylinder body 1 is communicated with, lower cylinder body 1 bottom corresponding with the inner groovy of connecting base 16 offers puts residual outlet 22, puts residual outlet 22 and is being communicated with and puts residual pipe 2, puts residual pipe 2 and is positioned at lower cylinder body 1 outside.
Working principle of the present invention is described as follows:
During filter normal filtration as shown in Figure 2: the fluid that filter enters filter from the filter import 14 of lower cylinder body 1, by filter core 11 bottoms, enter filter core, by interior mesh plate 18, folding filter screen 17 and outer mesh plate 20, in fluid, the folded filter screen 17 of impurity is tackled and is stayed on folding filter screen 17, clean fluid arrives the outside of filter core through filter core 11, then by the filter outlet 12 on cylindrical shell 5, discharge, complete the filter process of whole fluid.Now clean rotating shaft 13 transfixions.In Fig. 2, filled arrows represents the impure fluid before filtration, and hollow arrow represents fluid clean after filtering.
During filter back washing as shown in Figure 3: when filter core 11 is after long-term use, impurity that folded filter screen 17 is tackled is residual gathers certain degree, the passing capacity of folding filter screen 17 will decline, cause the inside and outside differential pressure of folding filter screen 17 to rise, when the inside and outside differential pressure that folding filter screen 17 detected when differential pressure pickup reaches predefined value, the solenoid valve that back washing transverse tube 3 connects is opened, clean cleaning runner and flow of ambient air in rotating shaft 13, the pressure cleaning in the cleaning runner in rotating shaft 13 sharply declines, folding filter screen 17 internal pressures at notch 19 places of the cleaning tank on left scraper plate 8 are far smaller than external pressure, fluid produces a flow direction contrary with filtering direction herein, see Fig. 4, fluid relies on folding filter screen 17 external pressures through outer mesh plate 20, folding filter screen 17 and interior mesh plate 18 enter the cleaning runner cleaning in rotating shaft 13, the impurity that folding filter screen 17 was tackled and remained in to folding filter screen 17 washes away, through back washing transverse tube 3, discharge.Because the notch 19 of cleaning tank is the outer little interior large horn mouth that falls, and contact with interior mesh plate 18, so the fluid in the outside both sides of notch 19 filter core 11 of cleaning tank can not enter cleaning tank, washing fluid can only enter the cleaning runner cleaning in rotating shaft 13 along outer mesh plate 20, folding filter screen 17 and interior mesh plate 18 these paths.When the solenoid valve being communicated with at back washing transverse tube 3 is opened, left scraper plate 8 rotates one to two week under cleaning rotating shaft 13 drives, and the notch 19 of cleaning tank contacts one to twice with interior mesh plate 18, thereby completes the cleaning action to whole filter core 11.In Fig. 3 and Fig. 4, filled arrows represents the fluid of impurity and the fluid of the impurity after back washing that before filtration, contain, and hollow arrow represents fluid clean after filtering.
In cleaning process, can adjust the solenoid valve opening time that back washing transverse tube 3 is communicated with according to the degree of filter core residual impurity, to reach best cleaning performance.Because carry out back washing on the area that filter core 11 only matches with the notch 19 of cleaning tank, and still carry out normal filtration operation on other area, so on using the motor of filter oil not have any impact.After cleaning completes, close the solenoid valve that back washing transverse tube 3 is communicated with, filter is got back to normal filtration working state.
Claims (3)
1. Full automatic backwashing filter, comprises cylindrical shell and the lower cylinder body of circular tube shaped, is provided with the filter core of circular tube shaped in cylindrical shell, is provided with cleaning rotating shaft in filter core, and the upper end of cylindrical shell is provided with upper cover, and lower end is provided with lower cover, covers under described and offers four fan-shaped runner imports; The upper end of cleaning rotating shaft extends outside upper cover, and lower end extends in lower cylinder body through lower cover; The sidewall at described cylindrical shell middle part is provided with filter outlet; Described lower cylinder body is the cylindrical body of upper end open, lower end closed, and the sidewall of lower cylinder body is provided with filter import, and the lower axial end of cylindrical shell is connecting the upper end of lower cylinder body; It is characterized in that:
In the cylindrical shell corresponding with lower cover, lower end mouth place is provided with the seal ring seat of ring-type, between the external cylindrical surface of seal ring seat and the inner cylindrical surface of cylindrical shell, be provided with seal ring, the lower end of described filter core is positioned in seal ring seat, and the upper end of filter core is fixed at upper end-hole place in cylindrical shell by retaining ring; Described filter core is comprised of the interior mesh plate of circular tube shaped, the outer mesh plate of circular tube shaped and folding filter screen, and folding filter screen is between interior mesh plate and outer mesh plate;
In cleaning rotating shaft in cylindrical shell, be arranged with left scraper plate and right scraper plate, left scraper plate and right scraper plate are in same plane; Between the upper end of cleaning rotating shaft and upper cover, by bearing and upper bearing bracket, coordinate, the lower end of cleaning rotating shaft is tubular axis, and by lower bearing, coordinates between lower cover; On described left scraper plate, offer cleaning tank; Described cleaning tank with clean the axially equidirectional of rotating shaft, cleaning tank along clean rotating shaft radially go deep in left scraper plate, form runner, and be communicated with the tubular axis that cleans rotating shaft lower end; The notch of cleaning tank is positioned at the outboard end of left scraper plate, and contacts with the interior mesh plate of filter core; The middle part of right scraper plate is provided with the radially circular arc of indent, and the outer end, top of the right scraper plate being connected with described circular arc two ends and outer end, bottom form locating bump, the rectangular bulk of described locating bump, and contact with the interior mesh plate of filter core; Bottom in lower cylinder body is provided with upright columned connecting base, connecting base internal upper part is provided with the cleaning runner of blind hole shape, the tubular axis that cleans rotating shaft lower end is plugged in and cleans in runner, and the lower end of described cleaning runner is being communicated with one end of back washing transverse tube, and the other end of back washing transverse tube extends lower cylinder body outside; The bottom of connecting base is provided with the inner groovy to fovea superior, and bottom in described inner groovy and lower cylinder body is communicated with, and the lower cylinder body bottom corresponding with the inner groovy of connecting base is provided with puts residual outlet, puts residual outlet and is being communicated with and puts residual pipe, puts residual pipe and is positioned at lower cylinder body outside.
2. Full automatic backwashing filter according to claim 1, is characterized in that: the cross section of described cleaning tank is strip, and the notch of cleaning tank is the outer little interior large horn mouth that falls, and groove depth is 50～100mm, and groove width is 15mm, and width of rebate is 6mm.
3. Full automatic backwashing filter according to claim 1, is characterized in that: between the external cylindrical surface of described seal ring seat and the inner cylindrical surface of cylindrical shell, be provided with two seals circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310542709.XA CN103527371B (en) | 2013-11-06 | 2013-11-06 | Full-automatic backwash filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310542709.XA CN103527371B (en) | 2013-11-06 | 2013-11-06 | Full-automatic backwash filter |
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| Publication Number | Publication Date |
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| CN103527371A true CN103527371A (en) | 2014-01-22 |
| CN103527371B CN103527371B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310542709.XA Active CN103527371B (en) | 2013-11-06 | 2013-11-06 | Full-automatic backwash filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104740920A (en) * | 2015-03-11 | 2015-07-01 | 安庆东舟电器制造有限公司 | Automatic fuel oil backwashing filter for ships |
| CN108119204A (en) * | 2018-03-07 | 2018-06-05 | 湖南梓唯汽车环保有限公司 | A kind of oil filtration device assembly capable of washing |
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| CN2640575Y (en) * | 2003-05-20 | 2004-09-15 | 上海森松制药设备有限公司 | Self-cleaning filter |
| KR20120114791A (en) * | 2011-04-08 | 2012-10-17 | (주)신일에이스 | Self cleaning strainer |
| CN202751864U (en) * | 2012-06-05 | 2013-02-27 | 陈太宏 | Self-cleaning filter |
| CN202946211U (en) * | 2012-11-21 | 2013-05-22 | 南京东南船舶设备有限公司 | Back flush type self-cleaning filter |
| CN203584644U (en) * | 2013-11-06 | 2014-05-07 | 安庆泰邦机械科技有限责任公司 | Fully automatic reverse flushing filter |
-
2013
- 2013-11-06 CN CN201310542709.XA patent/CN103527371B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2640575Y (en) * | 2003-05-20 | 2004-09-15 | 上海森松制药设备有限公司 | Self-cleaning filter |
| KR20120114791A (en) * | 2011-04-08 | 2012-10-17 | (주)신일에이스 | Self cleaning strainer |
| CN202751864U (en) * | 2012-06-05 | 2013-02-27 | 陈太宏 | Self-cleaning filter |
| CN202946211U (en) * | 2012-11-21 | 2013-05-22 | 南京东南船舶设备有限公司 | Back flush type self-cleaning filter |
| CN203584644U (en) * | 2013-11-06 | 2014-05-07 | 安庆泰邦机械科技有限责任公司 | Fully automatic reverse flushing filter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104740920A (en) * | 2015-03-11 | 2015-07-01 | 安庆东舟电器制造有限公司 | Automatic fuel oil backwashing filter for ships |
| CN108119204A (en) * | 2018-03-07 | 2018-06-05 | 湖南梓唯汽车环保有限公司 | A kind of oil filtration device assembly capable of washing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103527371B (en) | 2015-07-15 |
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Effective date of registration: 20160329 Address after: 246005 3.9 square kilometers Industrial Park, Anqing economic and Technological Development Zone, Anhui Patentee after: Anqing Talent Bank Ship Technology Co., Ltd. Address before: 246005 3.9 square kilometers Industrial Park, Anqing economic and Technological Development Zone, Anhui Patentee before: Anqing Taibang Machinery Technology Co., Ltd. |