CN109914528B - Water conservancy conveying device with cleaning function for drip irrigation - Google Patents
Water conservancy conveying device with cleaning function for drip irrigation Download PDFInfo
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- CN109914528B CN109914528B CN201910225813.3A CN201910225813A CN109914528B CN 109914528 B CN109914528 B CN 109914528B CN 201910225813 A CN201910225813 A CN 201910225813A CN 109914528 B CN109914528 B CN 109914528B
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Abstract
The invention relates to a water conservancy conveying device with a cleaning function for drip irrigation, which comprises a main body, a water inlet pipe, a water outlet pipe and two flanges, wherein the water inlet pipe is arranged on one side of the main body, the water outlet pipe is arranged on the other side of the main body, the water inlet pipe is communicated with the water outlet pipe through the main body, a driving device is arranged in the main body, the two flanges are respectively arranged at one end of the water outlet pipe far away from the main body and one end of the water inlet pipe far away from the main body, a filtering mechanism and a cleaning mechanism are arranged in the water inlet pipe, the filtering mechanism comprises a moving ring, a filter screen, a detection assembly and two connecting assemblies, each connecting assembly comprises a sliding block, a sliding rod, a fixed block and a spring, the water conservancy conveying device with the cleaning function for drip irrigation realizes the function of, the frequency of replacing the filter screen is reduced.
Description
Technical Field
The invention relates to the field of water-saving irrigation equipment, in particular to a water conservancy conveying device with a cleaning function for drip irrigation.
Background
The water-saving irrigation equipment is a general name of mechanical equipment with a water-saving function for irrigation, and the water pump is a common water-saving irrigation equipment, mainly used for conveying irrigation water and can be divided into a positive displacement pump and a vane pump according to the working principle.
The current water pump application is when driping irrigation the in-process, because of being used for driping irrigation the burette easy blockking up, consequently, in order to avoid the impurity of aquatic to get into the burette, can install the filter screen in the water pump, but the filter screen makes the back for a long time, easily makes impurity cover on the filter screen, leads to the mobility of water to reduce, and so, current water pump still can not real-time detection water pump water-logging mobility, has reduced the practicality.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the water conservancy conveying device with the cleaning function for drip irrigation is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: a water conservancy conveying device with a cleaning function for drip irrigation comprises a main body, a water inlet pipe, a water outlet pipe and two flanges, wherein the water inlet pipe is arranged on one side of the main body, the water outlet pipe is arranged on the other side of the main body, the water inlet pipe is communicated with the water outlet pipe through the main body, a driving device is arranged in the main body, the two flanges are respectively arranged at one end of the water outlet pipe, far away from the main body, and one end of the water inlet pipe, far away from the main body, and a filtering mechanism and a cleaning;
the filter mechanism comprises a moving ring, a filter screen, a detection assembly and two connecting assemblies, wherein the moving ring is coaxially arranged with the water inlet pipe, the moving ring is connected with the inner wall of the water inlet pipe in a sliding and sealing mode, the filter screen is installed in an annular hole of the moving ring, the two connecting assemblies are symmetrically arranged relative to the axis of the water inlet pipe, the detection assembly is connected with one of the connecting assemblies, and the detection assembly and the connecting assemblies are both located on one side, close to the main body, of the moving ring;
the connecting assembly comprises a sliding block, a sliding rod, a fixing block and a spring, the sliding rod is parallel to the water inlet pipe, one end of the sliding rod is fixed on the moving ring, the fixing block is fixed at the other end of the sliding rod, the sliding block is sleeved on the sliding rod, the sliding block is fixedly connected with the inner wall of the water inlet pipe, the spring is located between the fixing block and the sliding block, and the fixing block is connected with the sliding block through the spring;
the detection assembly comprises a detection pipe, a sealing cover and a distance sensor, the detection pipe and a sliding rod are coaxially arranged, the detection pipe is fixed on the inner wall of the water inlet pipe, the fixing block is arranged in the detection pipe, the fixing block is connected with the inner wall of the detection pipe in a sliding and sealing mode, the sealing cover covers one end, close to the main body, of the detection pipe, the sealing cover is connected with the detection pipe in a sealing mode, the distance sensor is located in the detection pipe, the distance sensor is fixed on the sealing cover, the main body is provided with a PLC (programmable logic controller) and an antenna, and the distance sensor and the antenna are both electrically;
clean mechanism sets up the one side of keeping away from the main part at the shift ring, clean mechanism includes paddle, bearing frame, axis of rotation, scrapes pole and two at least brushes, axis of rotation and the coaxial setting of inlet tube, the axis of scraping the pole is perpendicular just crossing with the axis of rotation, the length of scraping the pole is less than the internal diameter of shift ring, the middle-end of scraping the pole is fixed in the one end of axis of rotation, the other end at the axis of rotation is installed to the paddle, the bearing frame is installed in the axis of rotation, the bearing frame is fixed on the inner wall of inlet tube, the brush evenly sets up the one side of scraping being close to the main part of pole.
As preferred, for the convenience of the user knows the mobile condition of water in the inlet tube, be equipped with complementary unit on the inlet tube, complementary unit includes connecting box, push pedal and connecting pipe, the shape of connecting box is cylindrical, the connecting box is parallel with the inlet tube, the connecting box is fixed on the inlet tube, the push pedal is perpendicular with the inlet tube, the push pedal sets up in the connecting box, the inner wall slip and the sealing connection of push pedal and connecting box, one side of keeping away from the main part of connecting box is equipped with the through-hole, the connecting pipe sets up the one side that is close to the main part in the push pedal, the connecting box passes through connecting pipe and test tube intercommunication, the tie point of connecting pipe and test tube is located one side that is close to the main part of fixed block, the preparation material of connecting box.
As the preferred, improve the convenience, be equipped with the scale on the connecting box.
Preferably, a dust cover is provided on the through hole to prevent dust from entering the connection box through the through hole.
Preferably, the inner wall of the detection tube is coated with a sealing grease for improving the sealing property.
Preferably, in order to reduce the friction between the slide bar and the slider, said slide bar is provided with a grease coating.
Preferably, in order to improve the alarm effect, an alarm lamp is arranged on the main body and electrically connected with the PLC.
Preferably, in order to extend the service life of the main body, the main body is coated with an anti-corrosion zinc coating.
Preferably, in order to avoid collision between the fixed block and the distance sensor, a limit block is arranged in the detection tube, the limit block is fixed on the inner wall of the detection tube, and the limit block is positioned between the distance sensor and the fixed block.
Preferably, in order to facilitate the matching of the fixing block and the detection tube, a chamfer is arranged on the fixing block.
The water conservancy conveying device with the cleaning function for drip irrigation has the advantages that the function of detecting the circulation is realized through the filtering mechanism, compared with the existing filtering mechanism, the filtering mechanism is simple in structure, ingenious in design and higher in practicability, the effect of cleaning the filter screen is realized through the cleaning mechanism, the frequency of replacing the filter screen is reduced, compared with the existing cleaning mechanism, the cleaning mechanism does not need electric power driving, and is more environment-friendly.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of a water conservancy delivery device with a cleaning function for drip irrigation according to the present invention;
FIG. 2 is a cross-sectional view of the water intake tube of the water conservancy delivery device with cleaning function for drip irrigation of the present invention;
FIG. 3 is a schematic structural view of the connecting assembly of the water conveying device with cleaning function for drip irrigation of the present invention;
FIG. 4 is a schematic structural view of a cleaning mechanism of the water conservancy delivery device with a cleaning function for drip irrigation according to the present invention;
in the figure: 1. the automatic water-saving device comprises a main body, a water inlet pipe, a water outlet pipe, a flange, a moving ring, a filter screen, a sliding block, a sliding rod, a fixing block, a spring, a detection pipe, a sealing cover, a distance sensor, a blade, a bearing seat, a rotating shaft, a scraping rod, a brush, a connecting box, a push plate, a connecting pipe, a dust cover, a warning lamp and a limiting block, wherein the water inlet pipe, the water outlet pipe, the flange, the moving ring and the distance sensor are arranged at 4, the sliding block is 7, the sliding rod.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1, a water conservancy conveying device with a cleaning function for drip irrigation comprises a main body 1, a water inlet pipe 2, a water outlet pipe 3 and two flanges 4, wherein the water inlet pipe 2 is arranged on one side of the main body 1, the water outlet pipe 3 is arranged on the other side of the main body 1, the water inlet pipe 2 is communicated with the water outlet pipe 3 through the main body 1, a driving device is arranged in the main body 1, the two flanges 4 are respectively arranged at one end of the water outlet pipe 3, which is far away from the main body 1, and one end of the water inlet pipe 2, which is far away from the main body 1, and a;
be connected with external equipment through flange 4, make water follow inlet tube 2 get into in the main part 1 through drive arrangement, discharge from outlet pipe 3 again, here, the effect that sets up filtering mechanism is the mobility of being convenient for detect inlet tube 2 water-logging, and the effect that sets up clean mechanism is the impurity of driving.
As shown in fig. 2-3, the filtering mechanism includes a moving ring 5, a filter screen 6, a detecting component and two connecting components, the moving ring 5 is disposed coaxially with the water inlet pipe 2, the moving ring 5 is slidably and hermetically connected with the inner wall of the water inlet pipe 2, the filter screen 6 is mounted in an annular hole of the moving ring 5, the two connecting components are symmetrically disposed about the axis of the water inlet pipe 2, the detecting component is connected with one of the connecting components, and the detecting component and the connecting component are both located on one side of the moving ring 5 close to the main body 1;
as shown in fig. 3, the connecting assembly includes a sliding block 7, a sliding rod 8, a fixing block 9 and a spring 10, the sliding rod 8 is parallel to the water inlet pipe 2, one end of the sliding rod 8 is fixed on the moving ring 5, the fixing block 9 is fixed at the other end of the sliding rod 8, the sliding block 7 is sleeved on the sliding rod 8, the sliding block 7 is fixedly connected with the inner wall of the water inlet pipe 2, the spring 10 is located between the fixing block 9 and the sliding block 7, and the fixing block 9 is connected with the sliding block 7 through the spring 10;
the detection assembly comprises a detection pipe 11, a sealing cover 12 and a distance sensor 13, the detection pipe 11 and a slide rod 8 are coaxially arranged, the detection pipe 11 is fixed on the inner wall of the water inlet pipe 2, the fixing block 9 is arranged in the detection pipe 11, the fixing block 9 is in sliding and sealing connection with the inner wall of the detection pipe 11, the sealing cover 12 is covered on one end, close to the main body 1, of the detection pipe 11, the sealing cover 12 is in sealing connection with the detection pipe 11, the distance sensor 13 is located in the detection pipe 11, the distance sensor 13 is fixed on the sealing cover 12, the main body 1 is provided with a PLC (programmable logic controller) and an antenna, and the distance sensor 13 and the antenna are both electrically connected with the PLC;
water in the connecting pipe 21 passes filter screen 6, impurity in the aquatic can be filtered through filter screen 6, water is at the in-process that flows, filter screen 6 and shift ring 5 receive the resistance of water and move towards being close to 1 direction of main part, thereby make slide bar 8 drive fixed block 9 move towards being close to 1 direction of main part in detecting tube 11, and make the compression of spring 10, can detect the distance between distance sensor 13 and the fixed block 9 through distance sensor 13, when impurity is too much on filter screen 6, filter screen 6 increases the resistance of water, distance between distance sensor 13 and the fixed block 9 diminishes and is in after setting for the within range, distance sensor 13 gives PLC signals, PLC passes through the antenna and gives the user signals, remind the user to change filter screen 6.
As shown in fig. 4, the clean mechanism sets up in the one side of keeping away from main part 1 of shift ring 5, clean mechanism includes paddle 14, bearing frame 15, axis of rotation 16, scrapes pole 17 and two at least brushes 18, axis of rotation 16 and the coaxial setting of inlet tube 2, the axis of scraping pole 17 is perpendicular and crossing with the axis of rotation 16, the length of scraping pole 17 is less than the internal diameter of shift ring 5, the middle-end of scraping pole 17 is fixed in the one end of axis of rotation 16, the other end at axis of rotation 16 is installed to paddle 14, bearing frame 15 is installed on axis of rotation 16, bearing frame 15 is fixed on the inner wall of inlet tube 2, brush 18 evenly sets up in the one side that is close to main part 1 of scraping pole 17, brush 18 supports with filter screen 6 and leans on.
The flowing of water drives the paddle 14 to rotate, so that the rotating shaft 16 rotates under the supporting action of the bearing seat 15, the scraping rod 17 is driven to rotate, impurities on the filter screen 6 are concentrated through the hairbrush 18 when the scraping rod 17 rotates, the circulation of the filter screen 6 is improved, and the frequency of replacing the filter screen 6 is reduced.
Preferably, in order to facilitate the user to know the flowing condition of the water in the water inlet pipe 2, the water inlet pipe 2 is provided with an auxiliary mechanism, the auxiliary mechanism comprises a connecting box 19, a push plate 20 and a connecting pipe 21, wherein the connecting box 19 is cylindrical, the connecting box 19 is parallel to the water inlet pipe 2, the connecting box 19 is fixed on the water inlet pipe 2, the push plate 20 is vertical to the water inlet pipe 2, the push plate 20 is arranged in the connecting box 19, the push plate 20 is connected with the inner wall of the connecting box 19 in a sliding and sealing way, a through hole is arranged on one side of the connecting box 19 far away from the main body 1, the connecting pipe 21 is arranged on one side of the push plate 20 close to the main body 1, the connecting box 19 is communicated with the detection tube 11 through a connecting tube 21, the connecting point of the connecting tube 21 and the detection tube 11 is positioned on one side, close to the main body 1, of the fixing block 9, and the connecting box 19 is made of transparent toughened glass.
The movement of the fixing block 9 makes the air in the detecting tube 11 enter the connecting box 19 through the connecting tube 21, so that the push plate 20 moves under the action of air pressure, and the circulation of the user for connecting the filter screen 6 can be facilitated through the moving distance of the push plate 20 in the connecting box 19.
Preferably, the connection box 19 is provided with scales to improve convenience.
The distance that the user can conveniently move the push plate 20 is digitalized through the scales, and convenience is improved.
Preferably, in order to avoid dust from entering the connection box 19 through the through hole, a protective cover 22 is provided on the through hole.
The protective cover 22 prevents dust from entering the connecting box 19 through the through hole, and plays a role of dust prevention.
Preferably, the inner wall of the sensing tube 11 is coated with a sealing grease for improving sealability.
The sealing grease has the function of reducing the gap between the detection tube 11 and the fixed block 9, and the sealing performance is improved.
Preferably, in order to reduce the friction between the sliding rod 8 and the slider 7, said sliding rod 8 is provided with a grease coating.
The lubricating grease has the function of reducing the friction force between the sliding rod 8 and the sliding block 7 and improving the moving fluency of the sliding rod 8.
Preferably, in order to improve the alarm effect, an alarm lamp 23 is arranged on the main body 1, and the alarm lamp 23 is electrically connected with the PLC.
When the distance sensor 13 sends a signal to the PLC, the PLC controls the alarm lamp 23 to be turned on, and the alarm effect is improved.
Preferably, in order to extend the service life of the main body 1, the main body 1 is coated with an anti-corrosion zinc coating.
The anti-corrosion zinc coating can improve the anti-rust capacity of the main body 1 and prolong the service life of the main body 1.
Preferably, in order to avoid the collision between the fixed block 9 and the distance sensor 13, a limit block 24 is arranged in the detection tube 11, the limit block 24 is fixed on the inner wall of the detection tube 11, and the limit block 24 is located between the distance sensor 13 and the fixed block 9.
The limit block 24 can prevent the fixed block 9 from excessively moving to collide with the distance sensor 13, so that the limit protection effect is achieved.
Preferably, in order to facilitate the matching of the fixing block 9 and the detection tube 11, a chamfer is arranged on the fixing block 9.
The chamfer is used for preventing the fixed block 9 from being stuck due to burrs when being matched with the detection tube 11.
In the use process of the device, the paddle 14 is driven to rotate by the flowing of water, so that the rotating shaft 16 rotates under the supporting action of the bearing seat 15, the scraping rod 17 is driven to rotate, impurities in the water can be filtered through the filter screen 6, and during the flowing process of the water, the filter screen 6 and the moving ring 5 move towards the direction close to the main body 1 under the resistance of the water, so that the slide bar 8 drives the fixed block 9 to move towards the direction close to the main body 1 in the detection tube 11, and the spring 10 is compressed, the distance between the distance sensor 13 and the fixed block 9 can be detected by the distance sensor 13, when the impurities on the filter screen 6 are excessive, the resistance of the filter screen 6 to water is increased, the distance between the distance sensor 13 and the fixed block 9 is reduced and is within a set range, the distance sensor 13 sends a signal to the PLC, and the PLC sends a signal to a user through the antenna to remind the user to replace the filter screen 6;
here, make the brush 18 concentrate the impurity on the filter screen 6 through the rotation of scraping pole 17, improve the circulation of filter screen 6, reduced the frequency of changing filter screen 6, played the effect of clean filter screen 6, simultaneously, discover the signal through PLC for the user, played the function of detecting the circulation of filter screen 6.
Compared with the prior art, this a water conservancy conveyor for driping irrigation have clean function has realized the function that detects the circulation through filtering mechanism, compares with current filtering mechanism, and this filtering mechanism simple structure, design benefit, the practicality is stronger, moreover, has still realized the effect of clean filter screen 6 through clean mechanism, has reduced the frequency of changing filter screen 6, compares with current clean mechanism, and this clean mechanism need not electric drive, environmental protection more.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (1)
1. The water conservancy conveying device with the cleaning function for drip irrigation comprises a main body (1), a water inlet pipe (2), a water outlet pipe (3) and two flanges (4), wherein the water inlet pipe (2) is arranged on one side of the main body (1), the water outlet pipe (3) is arranged on the other side of the main body (1), the water inlet pipe (2) is communicated with the water outlet pipe (3) through the main body (1), a driving device is arranged in the main body (1), and the two flanges (4) are respectively arranged at one end, far away from the main body (1), of the water outlet pipe (3) and one end, far away from the main body (1), of the water inlet pipe (2), and are characterized in that a filtering mechanism and a cleaning mechanism are arranged in the water inlet pipe;
the filter mechanism comprises a moving ring (5), a filter screen (6), a detection assembly and two connecting assemblies, wherein the moving ring (5) and the water inlet pipe (2) are coaxially arranged, the moving ring (5) is connected with the inner wall of the water inlet pipe (2) in a sliding and sealing mode, the filter screen (6) is installed in an annular hole of the moving ring (5), the two connecting assemblies are symmetrically arranged relative to the axis of the water inlet pipe (2), the detection assembly is connected with one of the connecting assemblies, and the detection assembly and the connecting assemblies are both located on one side, close to the main body (1), of the moving ring (5);
the connecting assembly comprises a sliding block (7), a sliding rod (8), a fixing block (9) and a spring (10), the sliding rod (8) is parallel to the water inlet pipe (2), one end of the sliding rod (8) is fixed on the moving ring (5), the fixing block (9) is fixed at the other end of the sliding rod (8), the sliding block (7) is sleeved on the sliding rod (8), the sliding block (7) is fixedly connected with the inner wall of the water inlet pipe (2), the spring (10) is located between the fixing block (9) and the sliding block (7), and the fixing block (9) is connected with the sliding block (7) through the spring (10);
the detection assembly comprises a detection pipe (11), a sealing cover (12) and a distance sensor (13), the detection pipe (11) and a sliding rod (8) are coaxially arranged, the detection pipe (11) is fixed on the inner wall of the water inlet pipe (2), the fixing block (9) is arranged in the detection pipe (11), the fixing block (9) and the inner wall of the detection pipe (11) slide and are in sealing connection, the sealing cover (12) covers one end, close to the main body (1), of the detection pipe (11), the sealing cover (12) is in sealing connection with the detection pipe (11), the distance sensor (13) is located in the detection pipe (11), the distance sensor (13) is fixed on the sealing cover (12), the main body (1) is provided with a PLC (programmable logic controller) and an antenna, and the distance sensor (13) and the antenna are both electrically connected with the PLC;
the clean mechanism sets up in the one side of keeping away from main part (1) of shift ring (5), clean mechanism includes paddle (14), bearing frame (15), axis of rotation (16), scrapes pole (17) and two at least brushes (18), axis of rotation (16) and the coaxial setting of inlet tube (2), the axis of scraping pole (17) is perpendicular and crossing with the axis of rotation (16), the length of scraping pole (17) is less than the internal diameter of shift ring (5), the one end at axis of rotation (16) is fixed to the middle-end of scraping pole (17), the other end at axis of rotation (16) is installed to paddle (14), install on axis of rotation (16) bearing frame (15), bearing frame (15) are fixed on the inner wall of inlet tube (2), brush (18) evenly set up in the one side of scraping pole (17) that is close to main part (1), brush (18) support with filter screen (6) and lean on, be equipped with complementary unit on inlet tube (2), complementary unit includes connecting box (19), push pedal (20) and connecting pipe (21), the shape of connecting box (19) is cylindrical, connecting box (19) are parallel with inlet tube (2), connecting box (19) are fixed on inlet tube (2), push pedal (20) are perpendicular with inlet tube (2), push pedal (20) set up in connecting box (19), push pedal (20) slide and sealing connection with the inner wall of connecting box (19), one side of keeping away from main part (1) of connecting box (19) is equipped with the through-hole, connecting pipe (21) set up the one side that is close to main part (1) in push pedal (20), connecting box (19) are through connecting pipe (21) and detecting tube (11) intercommunication, connecting pipe (21) and the tie point of detecting tube (11) are located one side of being close to main part (1) of fixed block (9), the preparation material of connecting box (19) is transparent toughened glass, be equipped with the scale on connecting box (19), be equipped with protection casing (22) on the through-hole, scribble sealed fat on the inner wall of detecting tube (11), slide bar (8) are equipped with and scribble lubricating grease, be equipped with alarm lamp (23) on main part (1), alarm lamp (23) are connected with the PLC electricity, scribble anticorrosive galvanizing coat on main part (1), be equipped with stopper (24) in detecting tube (11), stopper (24) are fixed on the inner wall of detecting tube (11), stopper (24) are located between distance sensor (13) and fixed block (9), be equipped with the chamfer on fixed block (9).
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| CN201910225813.3A CN109914528B (en) | 2019-03-25 | 2019-03-25 | Water conservancy conveying device with cleaning function for drip irrigation |
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| CN201910225813.3A CN109914528B (en) | 2019-03-25 | 2019-03-25 | Water conservancy conveying device with cleaning function for drip irrigation |
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| CN109914528B true CN109914528B (en) | 2021-06-29 |
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| CN110786219A (en) * | 2019-11-26 | 2020-02-14 | 特尼格日 | A convenient type watering device that protective effect is good for gardens |
| CN112624504A (en) * | 2020-12-17 | 2021-04-09 | 浙江工业职业技术学院 | Shower waste water energy-saving utilization equipment |
| CN114625065B (en) * | 2022-03-14 | 2024-04-05 | 兰州安钧电子科技有限公司 | Supervision maintenance control platform for hydraulic optimization configuration |
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| KR101509234B1 (en) * | 2014-07-30 | 2015-04-08 | (주)승진엔지니어링 | Strainer filter assembly |
| CN205679299U (en) * | 2016-06-21 | 2016-11-09 | 中国矿业大学 | A kind of roadway gutter water level information collecting device |
| CN208169820U (en) * | 2018-05-06 | 2018-11-30 | 张秀丽 | A kind of dirty block-resistant type water pipeline of filter |
| CN208563443U (en) * | 2018-06-25 | 2019-03-01 | 青岛引黄济青水务有限责任公司 | Anti-clogging tap water supply pipeline |
| CN109499155A (en) * | 2018-10-22 | 2019-03-22 | 陈双英 | A kind of water generating pipeline water filter |
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Effective date of registration: 20210615 Address after: 247200 Hongxing formation, Huayuan village, Huayuan Township, Dongzhi County, Chizhou City, Anhui Province Applicant after: Anhui Zhidao Construction Engineering Co.,Ltd. Address before: 021000 Lingquan street, Manzhouli City, Hailar District, Hulunbuir City, Inner Mongolia Autonomous Region Applicant before: Li Caihua |
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