CN113351594A - Concrete pool cleaning device and method - Google Patents
Concrete pool cleaning device and method Download PDFInfo
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- CN113351594A CN113351594A CN202110515108.4A CN202110515108A CN113351594A CN 113351594 A CN113351594 A CN 113351594A CN 202110515108 A CN202110515108 A CN 202110515108A CN 113351594 A CN113351594 A CN 113351594A
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- negative pressure
- sedimentation tank
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- concrete
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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
- B08B9/08—Cleaning containers, e.g. tanks
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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
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/087—Cleaning containers, e.g. tanks by methods involving the use of tools, e.g. brushes, scrapers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a concrete pool cleaning device and a pool cleaning method, which comprises a concrete truck and a sedimentation tank, wherein the concrete truck is provided with a stirring tank, a discharge port of the stirring tank is connected with a tailing cleaning pump, an outlet of the tailing cleaning pump is connected to the sedimentation tank, the sedimentation tank is provided with a horizontal moving mechanism, when residues are sucked up through a negative pressure hole at the bottom of the sedimentation tank, the horizontal moving mechanism is matched with a spiral blade to rotate, materials near the negative pressure hole are quickly lifted into a transfer cavity, the materials are sucked away by using the suction force, the requirement on the suction force is reduced by reducing the height of the horizontal moving mechanism, the energy consumption required by the whole equipment is reduced, the conveying amount of the horizontal moving mechanism is also increased, the situation that the materials are difficult to directly ascend due to the fact that air is contained in the negative pressure suction process is avoided, and the materials on the bottom surface are directly sucked up by the negative pressure hole and conveyed to a spiral channel after the materials on the bottom surface are scraped up by using a scraper plate, and the air is lifted by the spiral blade and is continuously accumulated in the transfer cavity, so that the problem that the air is difficult to suck is avoided.
Description
Technical Field
The invention relates to the field of concrete pool cleaning, in particular to a concrete pool cleaning device and a concrete pool cleaning method.
Background
Concrete truck when putting in concrete material, can leave over the part in the agitator tank unavoidably, and for resources are saved, the concrete tails that general production company left over in can with the agitator tank retrieve, and the tails of retrieving can be used to produce concrete brick or other.
Present concrete truck tails recovery system, water and tails need be handled when getting into the collecting tank, then need wash the sedimentation tank after the processing is accomplished, and current cleaning equipment generally adopts the negative pressure pipe to suction to the bottom of the pool in, because the degree of depth of sedimentation tank is too big, at the in-process of perpendicular suction, the sedimentation tank is soon to be sucked up, then can the suction air, the existence of air then directly leads to being difficult to wash remaining part completely, lead to the clearance unclean easily.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a concrete pool cleaning device and a concrete pool cleaning method, which are used for overcoming the technical problems in the prior related art.
The technical scheme of the invention is realized as follows:
the utility model provides a clear pond device of concrete pond, includes concrete car and sedimentation tank, be provided with the agitator tank on the concrete car, be connected with the tails scavenging pump on the bin outlet of agitator tank, the export of tails scavenging pump connects on the sedimentation tank, install horizontal migration mechanism on the sedimentation tank, install negative pressure extraction mechanism, conveying mechanism and scrape the material mechanism on the horizontal migration mechanism respectively, horizontal migration mechanism is used for the drive to scrape the material mechanism and scrapes the deposit that deposits at the bottom of the pool along sedimentation tank reciprocating motion to negative pressure extraction mechanism and conveying mechanism take out the deposit discharge sedimentation tank simultaneously.
Further, horizontal migration mechanism includes motor, screw rod, slide bar and layer board, the motor is fixed beside the sedimentation tank, the output and the screw rod of motor meet, the screw rod meshes with the one end of layer board, the other end of layer board is run through by the slide bar, and the both ends of slide bar are inserted in the bearing of sedimentation tank.
Further, the negative pressure extracting mechanism comprises a negative pressure pump, a discharging pipe, a feeding pipe and a vertical plate, the negative pressure pump is installed on the supporting plate, an inlet of the negative pressure pump is connected with the feeding pipe, an outlet of the negative pressure pump is connected with the discharging pipe, the top surface of the vertical plate is connected with the supporting plate, and a negative pressure channel is machined in the vertical plate;
negative pressure passageway includes left side passageway, well passageway, right side passageway, shifts chamber and helical coiled passage, shifts the chamber and establishes the junction at layer board and riser, the one end of left side passageway, well passageway and right side passageway in proper order with shift the chamber intercommunication, the other end joint of left side passageway, well passageway and right side passageway is on the inlet pipe, wherein, shift the bottom and the helical coiled passage intercommunication in chamber, helical coiled passage internally mounted conveying mechanism.
Further, conveying mechanism includes the lantern ring, the body of rod, helical blade and motor, the lantern ring is inserted in well passageway to the wherein one end of the lantern ring is arranged in and is shifted the intracavity, the lantern ring internal rotation is inserted on the top of the body of rod, and the body of rod is sealed with the lantern ring, the bottom of the body of rod is inserted in the helical channel and is met with the motor, helical blade fixes on the body of rod to helical blade and helical channel sealing connection, wherein the negative pressure hole that runs through is seted up at the middle part of the body of rod, the top and the well passageway intercommunication in negative pressure hole, and the bottom symmetric distribution in negative pressure hole is on the bottom is global of the body of rod.
Furthermore, scraping mechanism includes scraper blade and division board, and the scraper blade is fixed respectively on the bottom edge of riser, and the equidistant fixing of division board is on the riser to leave the position in negative pressure hole between the division board, establish ties between the multiunit motor.
Furthermore, the partition board is prismatic, the scraper is an inclined plane, and the scraper moves back and forth to scrape sediment and is conveyed to the spiral channel through the negative pressure hole.
The invention provides another technology, and the pool cleaning method comprising the concrete pool cleaning device comprises the following steps:
s1, cleaning preparation; after the concrete in the sedimentation tank is treated, part of residues are located in the sedimentation tank, whether the working running states of a tailing cleaning pump, a horizontal moving mechanism, a negative pressure extraction mechanism, a conveying mechanism and a scraping mechanism are normal or not is checked, if the working running states are normal, the operation is started, if the working running states are abnormal, the operation is maintained, and the operation is started after the maintenance is finished;
s2, negative pressure starting: when the negative pressure pump works to extract air in the feeding pipe and simultaneously extract gas in the transfer cavity, the air pressure of the transfer cavity becomes low, the synchronous air pressure of the negative pressure holes becomes low, a liquid and solid mixture in the sedimentation tank is extracted, one part of the liquid and solid mixture enters the transfer cavity, the other part of the liquid and solid mixture enters the spiral channel, and a liquid level sensor in the transfer cavity sends a signal to the conveying mechanism when detecting the liquid level;
s3, three-way conveying: the motor works, the helical blade rotates, liquid and solid mixture is conveyed into the transfer cavity, the left channel, the middle channel and the right channel work synchronously, the liquid and the fixed mixture are extracted and discharged through the discharge pipe, and a pressure sensor at the pipe orifice of the discharge pipe sends a signal to the motor when detecting that the liquid flows.
S4, reciprocating: the motor drive screw is rotatory, and the layer board removes along the slide bar, drives the scraper blade and removes, scrapes the deposit on the sedimentation tank diapire and cooperates negative pressure hole extraction liquid and fixed mixture.
The technical scheme has the following advantages or beneficial effects:
1. the invention provides a concrete pool cleaning device and a pool cleaning method, wherein a helical blade is fixed on a rod body and is in sealing connection with a helical channel, the middle part of the rod body is provided with a through negative pressure hole, the top end of the negative pressure hole is communicated with a middle channel, the bottom of the negative pressure hole is symmetrically distributed on the peripheral surface of the bottom of the rod body, the negative pressure hole sucks materials into the helical channel, the helical channel is blocked, the height is overlarge, the required suction force is larger, when residues are sucked up through the negative pressure hole at the bottom of the helical blade, the helical blade is matched to rotate, the materials near the negative pressure hole are quickly lifted into a transfer cavity, the materials are sucked away by the suction force, the requirement on the suction force is reduced by reducing the height of the helical blade, the energy consumption required by the whole equipment is reduced, the conveying amount of the helical blade is also improved, and air is avoided in the negative pressure suction process, the material is difficult to directly rise, and after the material on the bottom surface is scraped by the scraper blade, the material is directly sucked by the negative pressure hole and conveyed to the spiral channel, and then lifted by the spiral blade and continuously accumulated in the transfer cavity, so that the problem that the air is difficult to suck is avoided.
2. The invention provides a concrete pool cleaning device and a pool cleaning method, wherein a scraping mechanism comprises scraping plates and partition plates, the scraping plates are respectively fixed on the bottom edges of vertical plates, the partition plates are fixed on the vertical plates at equal intervals, negative pressure hole positions are reserved among the partition plates, a plurality of groups of motors are connected in series, the length of the overlapped scraping mechanism and the length of the conveying mechanism after the overlapping scraping mechanism are just capable of covering the width of a sedimentation tank, and sediment at the bottom of the sedimentation tank can be sucked up after the scraping mechanism moves back and forth.
3. The invention provides a concrete pool cleaning device and a pool cleaning method, wherein a partition plate is prismatic, a scraper is an inclined surface, the scraper moves in a reciprocating manner to scrape precipitates and conveys the precipitates to a spiral channel through a negative pressure hole, and the scraper and the partition plate are structured to convey the scraped materials right towards the direction of the negative pressure hole.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of a concrete pool cleaning apparatus and a pool cleaning method according to an embodiment of the invention;
fig. 2 is an overall configuration diagram of a concrete pool cleaning apparatus according to an embodiment of the present invention;
fig. 3 is a conveying mechanism structure of the concrete pool cleaning device according to the embodiment of the invention;
FIG. 4 is a cross-sectional view taken at A of FIG. 2 of a concrete pool cleaning apparatus according to an embodiment of the present invention;
fig. 5 is a state view at B of fig. 2 of the concrete pool cleaning apparatus according to the embodiment of the present invention;
fig. 6 is a structural view of a vertical plate and a scraper mechanism of the concrete pool cleaning device according to the embodiment of the invention.
In the figure:
1. a concrete truck; 11. a stirring tank; 2. a tailing cleaning pump; 3. a horizontal movement mechanism; 31. a motor; 32. a screw; 33. a slide bar; 34. a support plate; 4. a negative pressure extraction mechanism; 41. a negative pressure pump; 42. a discharge pipe; 43. a feed pipe; 44. a vertical plate; 5. a conveying mechanism; 51. a collar; 52. a rod body; 521. a negative pressure hole; 53. a helical blade; 54. a motor; 6. a scraping mechanism; 61. a squeegee; 62. a partition plate; 7. a negative pressure channel; 71. a left channel; 72. a middle channel; 73. a right channel; 74. a transfer chamber; 75. a spiral channel; 8. a sedimentation tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Referring to fig. 1-6, a clear pond device of concrete pond, including concrete truck 1 and sedimentation tank 8, be provided with agitator tank 11 on the concrete truck 1, be connected with tails scavenging pump 2 on the bin outlet of agitator tank 11, the export of tails scavenging pump 2 is connected on sedimentation tank 8, install horizontal migration mechanism 3 on the sedimentation tank 8, install negative pressure extraction mechanism 4 on the horizontal migration mechanism 3 respectively, conveying mechanism 5 and scrape material mechanism 6, horizontal migration mechanism 3 is used for driving to scrape material mechanism 6 and scrapes the deposit that deposits at the bottom of the pool along sedimentation tank 8 reciprocating motion, and negative pressure extraction mechanism 4 and conveying mechanism 5 take out the deposit simultaneously and discharge sedimentation tank 8.
The horizontal moving mechanism 3 comprises a motor 31, a screw rod 32, a sliding rod 33 and a supporting plate 34, wherein the motor 31 is fixed beside the sedimentation tank 8, the output end of the motor 31 is connected with the screw rod 32, the screw rod 32 is meshed with one end of the supporting plate 34, the other end of the supporting plate 34 is penetrated by the sliding rod 33, and two ends of the sliding rod 33 are inserted into bearings of the sedimentation tank 8.
The negative pressure extracting mechanism 4 comprises a negative pressure pump 41, a discharging pipe 42, a feeding pipe 43 and a vertical plate 44, wherein the negative pressure pump 41 is arranged on the supporting plate 34, an inlet of the negative pressure pump 41 is connected with the feeding pipe 43, an outlet of the negative pressure pump 41 is connected with the discharging pipe 42, the top surface of the vertical plate 44 is connected with the supporting plate 34, and a negative pressure channel 7 is processed inside the vertical plate 44;
the negative pressure channel 7 comprises a left channel 71, a middle channel 72, a right channel 73, a transfer cavity 74 and a spiral channel 75, wherein the transfer cavity 74 is arranged at the joint of the supporting plate 34 and the vertical plate 44, one end of the left channel 71, one end of the middle channel 72 and one end of the right channel 73 are sequentially communicated with the transfer cavity 74, the other ends of the left channel 71, the middle channel 72 and the right channel 73 are connected to the feeding pipe 43, the bottom of the transfer cavity 74 is communicated with the spiral channel 75, and the conveying mechanism 5 is arranged in the spiral channel 75.
The conveying mechanism 5 comprises a lantern ring 51, a rod body 52, a spiral blade 53 and a motor 54, wherein the lantern ring 51 is inserted into a middle channel 72, one end of the lantern ring 51 is placed in a transfer cavity 74, the top end of the rod body 52 is inserted into the lantern ring 51 to rotate, the rod body 52 is sealed with the lantern ring 51, the bottom end of the rod body 52 is inserted into the spiral channel 75 to be connected with the motor 54, the spiral blade 53 is fixed on the rod body 52, and the spiral blade 53 is hermetically connected with the spiral channel 75, a negative pressure hole 521 is formed in the middle of the rod body 52 in a penetrating mode, the top end of the negative pressure hole 521 is communicated with the middle channel 72, the bottoms of the negative pressure holes 521 are symmetrically distributed on the periphery of the bottom of the rod body 52, the negative pressure holes 521 suck materials into the spiral channel 75, the spiral channel 75 is blocked, the height is too large, the required suction force is larger, when residues are sucked through the negative pressure holes 521 at the bottom of the rod body, the spiral blade 53 rotates in a matching mode, the materials near the negative pressure hole 521 are quickly lifted into the transfer cavity 74, the suction force of the materials is utilized to suck the materials away, the height of the materials is reduced, the requirement on the suction force is reduced, the energy consumption required by the whole equipment is reduced, the conveying amount of the materials is also improved, the air contained in the negative pressure suction process is avoided, the materials are difficult to directly rise, the materials on the bottom surface are directly sucked and conveyed to the spiral channel 75 through the negative pressure hole 521 after being scraped by the scraper blade 61, and the materials are lifted by the spiral blade 53 and are continuously accumulated in the transfer cavity 74, so that the problem that the air is difficult to suck is avoided.
The scraping mechanism 6 comprises a scraping plate 61 and a partition plate 62, the scraping plate 61 is respectively fixed on the bottom edge of a vertical plate 44, the partition plate 62 is fixed on the vertical plate 44 at equal intervals, the position of a negative pressure hole 521 is reserved between the partition plate 62, multiple groups of motors 54 are connected in series, the multiple groups of conveying mechanisms 5 and the scraping mechanism 6 are arranged, the length of the superposed materials just can cover the width of the sedimentation tank 8, and the scraping mechanism 6 moves back and forth, so that sediments at the bottom of the sedimentation tank 8 can be sucked up.
The partition plate 62 is in a prism shape, the scraper 61 is an inclined surface, the scraper 61 reciprocates to scrape sediment, the sediment is conveyed to the spiral channel 75 through the negative pressure hole 521, and the scraped material is conveyed towards the direction of the negative pressure hole 521 just by the scraper 61 and the partition plate 62.
The invention provides another technology, and the pool cleaning method comprising the concrete pool cleaning device comprises the following steps:
step one, cleaning preparation; after the concrete in the sedimentation tank 8 is treated, part of residues are located in the sedimentation tank 8, whether the working running states of the tailing cleaning pump 2, the horizontal moving mechanism 3, the negative pressure extraction mechanism 4, the conveying mechanism 5 and the scraping mechanism 6 are normal or not is checked, if the working running states are normal, the tailing cleaning pump is started, if the working running states are abnormal, the tailing cleaning pump is overhauled, and if the working running states are abnormal, the tailing cleaning pump is started;
step two, starting under negative pressure: when the negative pressure pump 41 works to extract air in the feeding pipe 43 and simultaneously extract gas in the transfer cavity 74, the air pressure of the transfer cavity 74 is lowered, the air pressure synchronized by the negative pressure holes 521 is lowered, a mixture of liquid and solid in the sedimentation tank 8 is extracted, one part of the mixture enters the transfer cavity 74, the other part of the mixture enters the spiral channel 75, and a liquid level sensor in the transfer cavity 74 sends a signal to the conveying mechanism 5 when detecting the liquid level;
step three, three-way conveying: the motor 54 is operated and the helical blades 53 are rotated to deliver the liquid and solid mixture into the transfer chamber 74, drawing the liquid and solid mixture out through the discharge conduit 42 due to the synchronized operation of the left channel 71, the middle channel 72 and the right channel 73, and sending a signal to the motor 31 when a pressure sensor at the orifice of the discharge conduit 42 detects the flow of the liquid.
Step four, reciprocating movement: the motor 31 drives the screw 32 to rotate, and the supporting plate 34 moves along the sliding rod 33, so as to drive the scraper 61 to move, scrape sediment on the bottom wall of the sedimentation tank 8 and cooperate with the negative pressure hole 521 to draw liquid and fixed mixture.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a clear pond device of concrete pond which characterized in that: including concrete truck (1) and sedimentation tank (8), its characterized in that: be provided with agitator tank (11) on concrete truck (1), be connected with tails scavenging pump (2) on the bin outlet of agitator tank (11), the export of tails scavenging pump (2) connects on sedimentation tank (8), install horizontal migration mechanism (3) on sedimentation tank (8), install negative pressure extraction mechanism (4), conveying mechanism (5) and scrape material mechanism (6) on horizontal migration mechanism (3) respectively, horizontal migration mechanism (3) are used for the drive to scrape material mechanism (6) and scrape the precipitate that deposits at the bottom of the pool along sedimentation tank (8) reciprocating motion to negative pressure extraction mechanism (4) and conveying mechanism (5) are simultaneously extracted precipitate and are discharged sedimentation tank (8).
2. The concrete pool cleaning device according to claim 1, wherein the horizontal moving mechanism (3) comprises a motor (31), a screw rod (32), a sliding rod (33) and a supporting plate (34), the motor (31) is fixed beside the sedimentation tank (8), the output end of the motor (31) is connected with the screw rod (32), the screw rod (32) is meshed with one end of the supporting plate (34), the other end of the supporting plate (34) is penetrated by the sliding rod (33), and two ends of the sliding rod (33) are inserted into bearings of the sedimentation tank (8).
3. The concrete pool cleaning device according to claim 2, wherein the negative pressure extraction mechanism (4) comprises a negative pressure pump (41), a discharge pipe (42), a feeding pipe (43) and a vertical plate (44), the negative pressure pump (41) is installed on the supporting plate (34), an inlet of the negative pressure pump (41) is connected with the feeding pipe (43), an outlet of the negative pressure pump (41) is connected with the discharge pipe (42), a top surface of the vertical plate (44) is connected with the supporting plate (34), and a negative pressure channel (7) is processed inside the vertical plate (44);
negative pressure passageway (7) are including left passageway (71), well passageway (72), right passageway (73), shift chamber (74) and spiral channel (75), shift chamber (74) and establish the junction at layer board (34) and riser (44), and the one end of left passageway (71), well passageway (72) and right passageway (73) communicates with shifting chamber (74) in proper order, and the other end of left passageway (71), well passageway (72) and right passageway (73) connects on inlet pipe (43), wherein, the bottom and the spiral channel (75) intercommunication of shifting chamber (74), spiral channel (75) internally mounted conveying mechanism (5).
4. A concrete pool cleaning device according to claim 3, wherein the conveying mechanism (5) comprises a collar (51), a rod body (52), a helical blade (53) and a motor (54), the collar (51) is inserted in the middle channel (72), and one end of the collar (51) is arranged in the transfer cavity (74), the top end of the rod body (52) is inserted into the collar (51) to rotate, the rod body (52) is sealed with the lantern ring (51), the bottom end of the rod body (52) is inserted into the spiral channel (75) and connected with the motor (54), the helical blade (53) is fixed on the rod body (52), and the helical blade (53) is connected with the helical channel (75) in a sealing way, wherein the middle part of the rod body (52) is provided with a through negative pressure hole (521), the top end of the negative pressure hole (521) is communicated with the middle channel (72), and the bottoms of the negative pressure hole (521) are symmetrically distributed on the circumferential surface of the bottom of the rod body (52).
5. A concrete pool cleaning device according to claim 4, characterized in that the scraping mechanism (6) comprises scraping plates (61) and partition plates (62), the scraping plates (61) are respectively fixed on the bottom edges of the vertical plates (44), the partition plates (62) are fixed on the vertical plates (44) at equal intervals, the positions of the negative pressure holes (521) are left between the partition plates (62), and the multiple sets of motors (54) are connected in series.
6. The concrete pool cleaning device according to claim 5, wherein the partition plate (62) is in a shape of a ridge, the scraper (61) is an inclined surface, and the scraper (61) moves back and forth to scrape sediment and convey the sediment to the spiral channel (75) through the negative pressure hole (521).
7. A pool cleaning method of a concrete pool cleaning device according to claim 6, characterized by comprising the following steps:
s1, cleaning preparation; after the concrete in the sedimentation tank (8) is treated, part of residues are located in the sedimentation tank (8), whether the working running states of the tailing cleaning pump (2), the horizontal moving mechanism (3), the negative pressure extraction mechanism (4), the conveying mechanism (5) and the scraping mechanism (6) are normal or not is checked, if the working running states are normal, the operation is started, if the working running states are abnormal, the operation is maintained, and the operation is started after the maintenance is finished;
s2, negative pressure starting: when the negative pressure pump (41) works to extract air in the feeding pipe (43) and simultaneously extract gas in the transfer cavity (74), the air pressure of the transfer cavity (74) becomes low, the synchronous air pressure of the negative pressure holes (521) becomes low, a mixture of liquid and solid in the sedimentation tank (8) is extracted, one part of the mixture enters the transfer cavity (74), the other part of the mixture enters the spiral channel (75), and a liquid level sensor in the transfer cavity (74) sends a signal to the conveying mechanism (5) when detecting the liquid level;
s3, three-way conveying: the motor (54) works, the helical blade (53) rotates, liquid and solid mixture is conveyed into the transfer cavity (74), the left channel (71), the middle channel (72) and the right channel (73) work synchronously in three ways, the liquid and the fixed mixture are extracted and discharged through the discharge pipe (42), and a pressure sensor at the pipe orifice of the discharge pipe (42) sends a signal to the motor (31) when detecting the liquid flow;
s4, reciprocating: the motor (31) drives the screw rod (32) to rotate, the supporting plate (34) moves along the sliding rod (33) to drive the scraping plate (61) to move, and the sediment on the bottom wall of the sedimentation tank (8) is scraped and the liquid and the fixed mixture are extracted by matching with the negative pressure hole (521).
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| CN115920152A (en) * | 2022-12-28 | 2023-04-07 | 张建松 | ICU severe patient uses drainage equipment |
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Denomination of invention: A concrete pool cleaning device and cleaning method Effective date of registration: 20230818 Granted publication date: 20220222 Pledgee: Bank of Jinhua Limited by Share Ltd. Lanxi branch Pledgor: Zhejiang Hengjie building materials Co.,Ltd. Registration number: Y2023980052679 |
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