CN113319070B - Automatic cleaning device and cleaning method for impurities in rotary valve - Google Patents
Automatic cleaning device and cleaning method for impurities in rotary valve Download PDFInfo
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- CN113319070B CN113319070B CN202110733241.7A CN202110733241A CN113319070B CN 113319070 B CN113319070 B CN 113319070B CN 202110733241 A CN202110733241 A CN 202110733241A CN 113319070 B CN113319070 B CN 113319070B
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- bevel gear
- impurity collecting
- impurity
- collecting pipe
- valve body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses an automatic impurity cleaning device and an automatic impurity cleaning method for a rotary valve, and the automatic impurity cleaning device comprises a valve body, wherein one end of the valve body is a water inlet pipe, the other end of the valve body is a water outlet pipe, the valve body is rotatably connected with a rotating wheel through a first rotating shaft, a plurality of impurity collecting pipes are annularly arranged in the rotating wheel, at least one impurity collecting pipe is arranged in the water inlet pipe, and the impurity collecting pipe enables the water inlet pipe to be communicated with a cavity of the valve body; the valve body is also rotatably connected with a driven bevel gear, the driven bevel gear is connected with a driving mechanism, the driven bevel gear is eccentrically provided with a deflector rod, a fork rod is fixedly sleeved on the first rotating shaft, and the deflector rod is in contact with the fork rod; the valve body is also connected with a cleaning mechanism for cleaning the impurity collecting pipe. The device has the advantages of pre-cleaning sewage and impurities in the pipeline, prolonging the service time of the valve, reducing the manual cleaning times, reducing the cleaning difficulty and improving the service efficiency.
Description
Technical Field
The invention relates to the technical field of valves, in particular to an automatic impurity cleaning device and an automatic impurity cleaning method for a rotary valve.
Background
Sewage treatment and water cyclic utilization belong to the important component part in the environmental protection field, along with domestic economy's rapid development and resident standard of living's improvement, annual industrial sewage and domestic sewage discharge are also constantly increasing, need control through the drainage valve door among the sewage treatment, and current drainage valve door, use a period of time after, because dirty winding is on the case surface of valve, make the valve block up, need one kind with impurity clearance in the pipeline in advance, the extension valve uses the ageing, reduce the clearance number of times.
Disclosure of Invention
In order to solve the problems in the prior art, an automatic cleaning device and a cleaning method for impurities in a rotary valve are provided.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides an automatic impurity cleaning device in a rotary valve, which comprises a valve body, wherein one end of the valve body is a water inlet pipe, the other end of the valve body is a water outlet pipe, the valve body is rotatably connected with a rotating wheel through a first rotating shaft, a plurality of impurity collecting pipes are annularly arranged in the rotating wheel, at least one impurity collecting pipe is arranged in the water inlet pipe, and the impurity collecting pipes enable the water inlet pipe to be communicated with a cavity of the valve body; the valve body is further rotatably connected with a driven bevel gear, the driven bevel gear is connected with a driving mechanism, the driven bevel gear is eccentrically provided with a deflector rod, a bifurcated rod is fixedly sleeved on the first rotating shaft, and the deflector rod is in contact with the bifurcated rod; the valve body is also connected with a cleaning mechanism for cleaning the impurity collecting pipe.
Preferably, the number of branches of the branch rod is the same as the number of the impurity collecting pipes.
Preferably, the driving mechanism comprises a second rotating shaft which is rotatably connected with the valve body, a water wheel blade is fixedly sleeved on the second rotating shaft, the bottom end of the second rotating shaft penetrates out of the water outlet pipe and is connected with a driving bevel gear, and the driving bevel gear is meshed with the driven bevel gear.
Preferably, clearance mechanism include with valve body sliding connection's push rod, the push rod is close to the one end of impurity collecting pipe is connected with the magnetism push pedal, the sliding connection of impurity collecting pipe has movable filter screen, impurity collecting pipe both sides are provided with and are used for restricting enclosing of movable filter screen removal and keep off, under initial condition, the magnetism push pedal with leave the clearance between the movable filter screen.
Preferably, the driving bevel gear is rotatably connected with a transmission rod through a first pin shaft, and the other end of the transmission rod is rotatably connected with the push rod through a second pin shaft.
Preferably, a water diversion plate is further arranged in the water inlet pipe.
The invention also provides a cleaning method, and the automatic cleaning device for impurities in the rotary valve comprises the following steps:
s1, water flows into the valve body through the water inlet pipe and then flows out of the water outlet pipe, and when the water flows, the driving mechanism drives the driven bevel gear to rotate;
s2: driven bevel gear drives the driving lever and rotates, and the driving lever drives the rotation of bifurcated rod to make the impurity collecting pipe that the inside contains impurity rotate, make new impurity collecting pipe move to just contain impurity's impurity collecting pipe position department, rivers get into the outlet pipe through new impurity collecting pipe in, clearance mechanism carries out the clearance work to the impurity collecting pipe that contains impurity.
Preferably, in step S1, the method for driving the driven bevel gear to rotate by the driving mechanism includes that, after passing through the water diversion plate, water flows through the water turbine blade, the water flows drive the water turbine blade to rotate, the second rotating shaft drives the driving bevel gear to rotate, and the driving bevel gear drives the driven bevel gear to rotate.
Preferably, when water flows through the water inlet pipe, the water flow is filtered under the action of the movable filter screen in the impurity collecting pipe.
Preferably, in step S2, the method for cleaning the impurity collecting pipe by the cleaning mechanism includes that the drive bevel gear drives the transmission rod to rotate, the transmission rod drives the push rod to move horizontally, the push rod drives the magnetic push plate to move in a direction close to the movable filter screen, the magnetic push plate drives the movable filter screen to complete the cleaning of the impurities in the impurity collecting pipe, when the drive bevel gear drives the magnetic push plate to reset, the magnetic push plate drives the movable filter screen to reset, and the movable filter screen is always in the impurity collecting pipe under the action of the enclosure, so as to complete the cleaning of the impurities in the impurity collecting pipe.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, a certain drop is formed between the upper layer of water flow and the lower layer of water flow through the water dividing function of the arranged water dividing plate, the water flow can drive the water wheel blade to rotate so as to drive the second rotating shaft to rotate, then the driving lever is driven to rotate through the driving bevel gear and the driven bevel gear so as to drive the forked lever to rotate, and the angle of each rotation of the forked lever is the angle between any adjacent impurity collecting pipes, so that the replacement work of a new impurity collecting pipe can be realized, the cleaning and filtering work of impurities is facilitated;
2. the invention is also provided with a mechanism that the transmission rod drives the push rod to move horizontally, the transmission rod and the push rod form a slider-crank mechanism, thereby driving the push rod to move horizontally, realizing the filtering function of water flow under the action of the movable filter screen in the impurity collecting pipe, simultaneously, when the push rod drives the movable filter screen to move leftwards, the movable filter screen realizes the cleaning function of impurities in the impurity collecting pipe, and simultaneously, the arranged magnetic push plate can well adsorb the movable filter screen and realize the reset function of the movable filter screen when being reset, therefore, the movable filter screen can play the filtering function when water flows pass through and can realize the cleaning function of impurities in the impurity collecting pipe, the structure is reasonable, the operation is simple, the cost is lower, the normal passing of water flows is not influenced, the service time of the valve is prolonged, the manual cleaning times are reduced, and the cleaning difficulty is reduced, the use efficiency is improved.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is an overall front view of the present invention;
FIG. 2 is a schematic view of the structure of part A-A in FIG. 1;
fig. 3 is a schematic view of the fork lever of fig. 1.
Description of reference numerals:
1, a water inlet pipe; 2, a valve body; 3 impurity collecting pipe, 4 water dividing plate; 5 a first rotating shaft; 6 a second rotating shaft; 7 a bifurcated bar; 8 water wheel blades; 9, discharging a water pipe; 10 a first pin shaft; 11 a drive bevel gear; 12 a transmission rod; 13 a driven bevel gear; 14, a driving lever; 15 a second pin shaft; 16 push rods; 17 a linear bearing; 18 a magnetic pusher plate; 19 a movable filter screen; 20 wheels.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1-3, this embodiment provides an automatic cleaning device of impurity in rotation type valve, including valve body 2, valve body 2 one end is inlet tube 1, and the valve body 2 other end is outlet pipe 9, and valve body 2 rotates through first pivot 5 and is connected with runner 20, and a plurality of impurity collecting pipe 3 has been seted up to the annular in the runner 20, and at least one impurity collecting pipe 3 sets up in inlet tube 1, and impurity collecting pipe 3 makes inlet tube 1 and 2 cavitys of valve body be linked together.
The two ends of the first rotating shaft 5 are rotatably connected with the valve body 2 through bearings. And a portion of the runner 20 adjacent to the first rotating shaft 5 is in contact with the valve body 2, thereby preventing water from flowing out of the gap.
The valve body 2 is also rotatably connected with a driven bevel gear 13, the driven bevel gear 13 is connected with a driving mechanism, the driven bevel gear 13 is eccentrically provided with a deflector rod 14, the first rotating shaft 5 is fixedly sleeved with a bifurcated rod 7, and the deflector rod 14 is in contact with the bifurcated rod 7; the valve body 2 is also connected with a cleaning mechanism for cleaning the impurity collecting pipe 3.
The number of branches of the branch rod 7 is the same as that of the impurity collecting tube 3. Therefore, the deflector rods 14 correspond to the fork rods 7 in number one by one, and the impurity collecting pipe 3 is driven to rotate one circle when the deflector rods 14 rotate one circle. Wherein the diameter of the impurity collecting pipe 3 is matched with the diameter of the water inlet pipe 1 and has the same size.
The contact position of the rotating wheel 20, the valve body 2 and the water inlet pipe 1 is provided with a sealing gasket, so that when the rotating wheel 20 rotates, the impurity collecting pipe 3 always keeps close contact with the valve body 2, and the water leakage is prevented. The water flow enters the cavity of the valve body 2 through the water inlet pipe 1 and the impurity collecting pipe 3.
The driving mechanism comprises a second rotating shaft 6 which is rotatably connected with the valve body 2, a water wheel blade 8 is fixedly sleeved on the second rotating shaft 6, the bottom end of the second rotating shaft 6 penetrates out of the water outlet pipe 9 and is connected with a driving bevel gear 11, and the driving bevel gear 11 is meshed with a driven bevel gear 13.
A water distribution plate 4 is also arranged in the water inlet pipe 2. The water diversion plate 4 can realize the effect of diversion, and after water current passed through the water diversion plate 4, two-layer rivers formed certain drop about the lower floor, and then rivers can drive water wheel blade 8 and rotate to drive second pivot 6 and rotate, then drive driving lever 14 through initiative bevel gear 11 and passive bevel gear 13 and rotate, and then drive bifurcated pole 7 and rotate.
The angle of 7 rotations at every turn of bifurcated pole is the angle between arbitrary adjacent impurity collecting pipe 3, consequently can realize new impurity collecting pipe 3's change work, does benefit to the clearance filtering work of impurity, adopts rivers driven mode, and is rational in infrastructure, economical and practical, with low costs, and the frequency of clearance is relevant with the size of rivers, and consequently rivers are big more, and impurity in the inlet tube 1 is more, and water wheels blade 8 pivoted frequency is just also fast more to realize the automatic cleaning work of self-adaptation.
The clearance mechanism includes the push rod 16 with 2 sliding connection of valve body, and the one end that push rod 16 is close to impurity collecting pipe 3 is connected with magnetism push pedal 18, and sliding connection has movable filter screen 19 in impurity collecting pipe 3, and impurity collecting pipe 3 both sides are provided with and are used for restricting enclosing of movable filter screen 19 removal and keep off, under initial condition, leave the clearance between magnetism push pedal 18 and the movable filter screen 19.
The driving bevel gear 11 is rotatably connected with a transmission rod 12 through a first pin shaft 10, and the other end of the transmission rod 12 is rotatably connected with a push rod 16 through a second pin shaft 15. The movable filter screen 19 is made of iron materials, and the magnetic push plate 18 has a good attraction effect on the movable filter screen 19.
The diameter of the magnetic push plate 18 is slightly smaller than that of the impurity collecting pipe 3, so that the enclosure is prevented from influencing the normal movement of the magnetic push plate 18.
The push rod 16 is connected with the valve body 2 through the linear bearing 17, the linear bearing 17 is connected with the push rod 16 in a sliding mode, the outer ring of the linear bearing 17 is fixedly connected with the valve body 2, and the friction force of the linear bearing 17 is smaller, so that the second rotating shaft 6 can drive the push rod 16 to move in the horizontal direction without large driving force.
The diameter of the net opening of the movable filter screen 19 is matched with the size of the impurities, so that the filtering effect of the impurities is realized, and the movable filter screen 19 freely slides in the impurity collecting pipe 3 all the time under the effect of the enclosure.
Wherein lie in the left fender that encloses of impurity collecting pipe 3, adopt the bottom opening setting, enclose the fender setting at the left both ends of impurity collecting pipe 3, consequently enclose the normal cleaning work that the fender can not influence impurity, and have better limiting displacement to movable filter screen 19.
The transmission rod 12 drives the push rod 16 to move horizontally, the transmission rod 12 and the push rod 16 form a crank slider mechanism, and the valve body 2 has a limiting effect on the movement of the push rod 16, so that the push rod 16 can only slide along the horizontal direction, and the push rod 16 is driven to move horizontally.
Under the effect of movable filter screen 19 in impurity collecting pipe 3, realize the filtering action of rivers, when push rod 16 drove movable filter screen 19 and move left simultaneously, movable filter screen 19 realizes the cleaning work of impurity in the impurity collecting pipe 3, and the magnetism push pedal 18 that sets up simultaneously can have better adsorption work to movable filter screen 19 when reseing, realizes movable filter screen 19's reset work.
Therefore, the movable filter screen 19 can not only play a role in filtering when water flows pass through, but also realize the impurity cleaning work in the impurity collecting pipe 3, has reasonable structure and simple operation, is driven by water flows, has lower cost, does not influence the normal process of the water flows, prolongs the service life of the valve, reduces the manual cleaning times, reduces the cleaning difficulty and improves the use efficiency.
The invention also provides a cleaning method, and the automatic cleaning device for impurities in the rotary valve comprises the following steps:
s1, water flows through the water inlet pipe 1 into the valve body 2 and then flows out of the water outlet pipe 9, and when the water flows, the driving mechanism drives the driven bevel gear 13 to rotate;
s2: driven bevel gear 13 drives driving lever 14 and rotates, and driving lever 14 drives bifurcated rod 7 and rotates to make the impurity collecting pipe 3 that the inside contains impurity rotate, make new impurity collecting pipe 3 move to just contain impurity's impurity collecting pipe 3 position department, rivers get into outlet pipe 9 through new impurity collecting pipe 3 in, clearance mechanism carries out the cleaning work to the impurity collecting pipe 3 that contains impurity.
In step S1, the method for driving the driven bevel gear 13 to rotate by the driving mechanism includes that after passing through the water diversion plate 4, water flows through the water wheel blade 8, the water flows drive the water wheel blade 8 to rotate, the driving bevel gear 11 is driven to rotate by the second rotating shaft 6, the driving bevel gear 11 drives the driven bevel gear 13 to rotate, and the water flows are filtered under the action of the movable filter screen 19 in the impurity collecting pipe 3.
In step S2, the method for cleaning the impurity collecting tube 3 by the cleaning mechanism includes that the driving bevel gear 11 drives the transmission rod 12 to rotate, the transmission rod 12 drives the push rod 16 to move horizontally, the push rod 16 drives the magnetic push plate 18 to move in a direction close to the movable filter screen 19, the magnetic push plate 18 drives the movable filter screen 19 to complete the cleaning work of the impurities in the impurity collecting tube 3, when the driving bevel gear 11 drives the magnetic push plate 18 to reset, the magnetic push plate 18 drives the movable filter screen 19 to reset, and the movable filter screen 19 is always in the impurity collecting tube 3 under the action of the enclosure, so that the cleaning work of the impurities in the impurity collecting tube 3 is completed.
It should be noted that, because the bearing ball of the linear bearing 17 is in point contact with the bearing outer sleeve, the steel ball rolls with the minimum frictional resistance, so that the linear bearing 17 has small friction and is relatively stable, does not change with the bearing speed, and can obtain stable linear motion with high sensitivity and high precision; moreover, when the deflector rod 14 rotates, the deflector rod 14 is contacted with the bifurcated rod 7, and the rotation of the bifurcated rod 7 can be driven at the moment of contact, so that the rotation of the bifurcated rod 7 is instantaneous, and the rotating angle of each time is the angle between any adjacent impurity collecting pipes 3, and because the position where the impurity collecting pipe 3 is contacted with the valve body 2 is provided with the sealing gasket, the sealing gasket can play a role in limiting the movement of the impurity collecting pipe 3 and prevent the impurity collecting pipe 3 from rotating too much distance; the magnetic push plate 18 is provided with a certain gap from the movable filter screen 19, so that when the deflector rod 14 drives the bifurcated rod 7 to rotate, the driving bevel gear 11 drives the push rod 16 to move leftwards in the horizontal direction through the transmission rod 12, and after the deflector rod 14 drives the bifurcated rod 7 to complete the rotation action, the magnetic push plate 18 enters the impurity collecting pipe 3, so that the impurity cleaning work in the impurity collecting pipe 3 is completed along with the continuous pushing of the push rod 16.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. The automatic impurity cleaning device in the rotary valve comprises a valve body (2), wherein one end of the valve body (2) is provided with a water inlet pipe (1), the other end of the valve body (2) is provided with a water outlet pipe (9), and the automatic impurity cleaning device is characterized in that the valve body (2) is rotatably connected with a rotating wheel (20) through a first rotating shaft (5), a plurality of impurity collecting pipes (3) are annularly arranged in the rotating wheel (20), at least one impurity collecting pipe (3) is arranged in the water inlet pipe (1), and the impurity collecting pipe (3) enables the water inlet pipe (1) to be communicated with a cavity of the valve body (2); the valve body (2) is further rotatably connected with a driven bevel gear (13), the driven bevel gear (13) is connected with a driving mechanism, the driven bevel gear (13) is eccentrically provided with a deflector rod (14), the first rotating shaft (5) is fixedly sleeved with a bifurcated rod (7), and the deflector rod (14) is in contact with the bifurcated rod (7); the valve body (2) is also connected with a cleaning mechanism for cleaning the impurity collecting pipe (3);
the branching number of the branching rods (7) is the same as that of the impurity collecting pipes (3);
the driving mechanism comprises a second rotating shaft (6) which is rotationally connected with the valve body (2), a water wheel blade (8) is fixedly sleeved on the second rotating shaft (6), the bottom end of the second rotating shaft (6) penetrates through the water outlet pipe (9) and is connected with a driving bevel gear (11), and the driving bevel gear (11) is meshed with the driven bevel gear (13);
the cleaning mechanism comprises a push rod (16) which is in sliding connection with the valve body (2), one end, close to the impurity collecting pipe (3), of the push rod (16) is connected with a magnetic push plate (18), a movable filter screen (19) is connected in the impurity collecting pipe (3) in a sliding mode, two sides of the impurity collecting pipe (3) are provided with enclosing barriers used for limiting the movable filter screen (19) to move, and a gap is reserved between the magnetic push plate (18) and the movable filter screen (19) in an initial state;
the driving bevel gear (11) is rotatably connected with a transmission rod (12) through a first pin shaft (10), and the other end of the transmission rod (12) is rotatably connected with the push rod (16) through a second pin shaft (15).
2. A rotary valve according to claim 1, wherein a water diversion plate (4) is further disposed in the water inlet pipe (1).
3. A method for cleaning, which is characterized in that the automatic cleaning device for impurities in the rotary valve as claimed in claim 2 is adopted, and comprises the following steps:
s1, enabling water flow to enter the valve body (2) through the water inlet pipe (1) and then flow out of the water outlet pipe (9), and driving the driven bevel gear (13) to rotate by the driving mechanism when the water flow flows;
s2: driven bevel gear (13) drive driving lever (14) and rotate, and driving lever (14) drive bifurcated rod (7) and rotate to make impurity collecting pipe (3) that the inside contains impurity rotate, make new impurity collecting pipe (3) move to just contain impurity collecting pipe (3) position department of impurity just, rivers get into outlet pipe (9) through new impurity collecting pipe (3) in, clearance mechanism carries out the cleaning work to impurity collecting pipe (3) that contain impurity.
4. A cleaning method according to claim 3, wherein in the step S1, the method for driving the driven bevel gear (13) to rotate by the driving mechanism comprises that the water flows through the water wheel blades (8) after passing through the water diversion plate (4), the water flow drives the water wheel blades (8) to rotate, the driving bevel gear (11) is driven to rotate by the second rotating shaft (6), and the driving bevel gear (11) drives the driven bevel gear (13) to rotate.
5. A method according to claim 3, characterized in that the water flow is filtered by means of a movable screen (19) in the impurity collecting duct (3) when the water flow passes through the inlet duct (1).
6. The method of claim 4, wherein in the step S2, the method for cleaning the impurity collecting pipe (3) by the cleaning mechanism comprises that the drive bevel gear (11) drives the drive rod (12) to rotate, the drive rod (12) drives the push rod (16) to move horizontally, the push rod (16) drives the magnetic push plate (18) to move in a direction close to the movable filter screen (19), the magnetic push plate (18) drives the movable filter screen (19) to complete the impurity cleaning operation in the impurity collecting pipe (3), when the drive bevel gear (11) drives the magnetic push plate (18) to reset, the magnetic push plate (18) drives the movable filter screen (19) to reset, and under the action of the enclosure, the movable filter screen (19) is always in the impurity collecting pipe (3), thereby completing the impurity cleaning operation in the impurity collecting pipe (3).
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| CN202110733241.7A CN113319070B (en) | 2021-06-30 | 2021-06-30 | Automatic cleaning device and cleaning method for impurities in rotary valve |
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| CN202110733241.7A CN113319070B (en) | 2021-06-30 | 2021-06-30 | Automatic cleaning device and cleaning method for impurities in rotary valve |
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| CN113319070B true CN113319070B (en) | 2022-04-15 |
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| CN114225825B (en) * | 2021-12-01 | 2022-11-15 | 青岛黑猫炭黑科技有限责任公司 | Device for reducing screen residues of product washing |
| CN114163007B (en) * | 2021-12-02 | 2023-06-09 | 苏州东大仁智能科技有限公司 | Dynamic membrane filter for oily wastewater treatment equipment |
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| CN204952445U (en) * | 2015-09-14 | 2016-01-13 | 江苏宏宇环境科技有限公司 | Strainer valve |
| US20170320111A1 (en) * | 2016-05-09 | 2017-11-09 | Lawrence Anthony Wiwi | Side-opening sleeve valve |
| CN211097825U (en) * | 2019-10-18 | 2020-07-28 | 新疆新辰鼎盛石油工程有限公司 | Oil field water injection recoil type filtering dirt remover |
| CN211475196U (en) * | 2019-10-31 | 2020-09-11 | 章时铭 | Prevent blockking up water conservancy pipeline |
| CN211752923U (en) * | 2019-12-27 | 2020-10-27 | 南京尚勤新材料科技有限公司 | A desalination filter equipment for production of alcohol ether gemini surfactant |
| CN211753094U (en) * | 2020-03-05 | 2020-10-27 | 上海景铭建设发展有限公司 | Filter device on dredging water suction pipe |
| CN112023475A (en) * | 2020-09-01 | 2020-12-04 | 陈红丽 | Sewage filtering processor |
| CN112704945B (en) * | 2020-12-07 | 2023-03-24 | 湖南谊诚科技有限公司 | Waste water treatment equipment is used in chemical fertilizer processing convenient to filter screen is dismantled |
| CN112718473B (en) * | 2020-12-21 | 2022-08-12 | 山东凤鸣桓宇环保有限公司 | Filter screen cleaning structure |
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Denomination of invention: An automatic cleaning device and cleaning method for impurities inside a rotary valve Effective date of registration: 20230829 Granted publication date: 20220415 Pledgee: Industrial and Commercial Bank of China Ninghai sub branch Pledgor: NINGBO HUACHENG VALVE Co.,Ltd. Registration number: Y2023330001868 |
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