CN112296029B - Cleaning method of full-automatic cement paste spraying equipment - Google Patents
Cleaning method of full-automatic cement paste spraying equipment Download PDFInfo
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- CN112296029B CN112296029B CN201910691706.XA CN201910691706A CN112296029B CN 112296029 B CN112296029 B CN 112296029B CN 201910691706 A CN201910691706 A CN 201910691706A CN 112296029 B CN112296029 B CN 112296029B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 146
- 238000005507 spraying Methods 0.000 title claims abstract description 53
- 239000004568 cement Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 220
- 238000003756 stirring Methods 0.000 claims description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 238000007599 discharging Methods 0.000 claims description 30
- 239000007921 spray Substances 0.000 claims description 28
- 239000002893 slag Substances 0.000 claims description 23
- 238000001914 filtration Methods 0.000 claims description 20
- 230000005484 gravity Effects 0.000 claims description 19
- 239000002351 wastewater Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 15
- 239000013049 sediment Substances 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 4
- 238000000151 deposition Methods 0.000 claims description 3
- 230000003203 everyday effect Effects 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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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
- 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
- B08B9/0328—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 by purging the pipe with a gas or a mixture of gas and liquid
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses a cleaning method of full-automatic cement paste spraying equipment, and relates to the field of cement paste spraying equipment. The invention adopts the method of combining the slurry path cleaning, the rapid cleaning and the complete machine cleaning, so that the equipment and the slurry path can be cleaned timely, effectively and thoroughly under various conditions, and the slurry path of the equipment is prevented from being blocked, thereby ensuring the continuous operation of the equipment and the slurry path, prolonging the service life of the spraying equipment and the slurry path, reducing the spraying cost and ensuring the spraying quality.
Description
Technical Field
The invention relates to the field of cement paste spraying equipment, in particular to a cleaning method of full-automatic cement paste spraying equipment.
Background
The Prestressed Concrete Cylinder Pipe (PCCP) is widely applied to major water diversion and water transfer hydraulic construction projects such as south-to-north water diversion in China and urban water supply pipe network construction projects due to the excellent characteristics of large caliber, high pressure, deep earthing and long distance, and the durability of prestressed high-strength steel wires wound on the core of the PCCP directly influences the structural safety of the PCCP. The GB/T19685 'prestressed concrete cylinder pipe' national standard requires that cement paste with specified water-cement ratio is sprayed when wire winding is carried out, and the surface of the steel wire is effectively protected for the first time. The cement paste water-cement ratio on the surface of the steel wire is 0.625, the cement paste water-cement ratio has strong viscosity, the solidification speed is very high, the stirred slurry exceeds 45 minutes, initial setting is started, sludge can be generated, the engineering quality can be influenced by continuous use, if the cleaning is not timely and thorough, the cement paste water-cement ratio can be solidified on the inner wall of a stirring barrel or a slurry path pipeline, and the long-term shadow spraying can be normally carried out.
When the cleaning is generally carried out, workers directly take the water pipe to clean the stirring barrel, firstly, the labor is wasted, secondly, if the responsibility of the workers is not strong, the cleaning is not in place and not thorough, equipment and a slurry path are easy to block, and the spraying work cannot be normally carried out.
In the field of clean slurry spraying equipment, cleaning of the equipment and a slurry path is a very critical link, which not only relates to whether spraying work can be continuously carried out, but also influences the service life and the spraying quality of the equipment and the slurry path, and relates to the cost of the spraying work.
Disclosure of Invention
The invention aims to solve the technical problem of providing a cleaning method of full-automatic cement paste spraying equipment, which is simple and easy to realize and has a good cleaning effect.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a cleaning method of full-automatic cement paste spraying equipment comprises the steps of slurry path cleaning, quick cleaning and complete machine cleaning; wherein,
the slurry path cleaning comprises the following steps:
a1, slurry discharging of the slurry path, opening a slurry discharging valve 4, closing a slurry discarding valve 6, starting a screw pump 7, reversing the screw pump 7, discharging slurry in the slurry path 14 into the stirring barrel 2, closing the screw pump 7, closing the slurry discharging valve 4, opening the slurry discarding valve 6, and discharging residual slurry in the slag basin 5 and the slurry path 14 under the action of gravity;
a2, slurry road water and gas mixing cleaning, closing a slurry discharge valve 4, opening a slurry discharge valve 6, opening a cleaning machine 10 to spray water to a screw pump 7, opening a cleaning air valve 8 to spray air to a feeding section of the screw pump 7, starting the screw pump 7, opening a dredging air valve 11 to spray air to a discharging section of the screw pump 7, allowing cleaning wastewater to flow out from the slurry discharge valve through a slurry sedimentation tank 5 and a spray head 9 through a slurry spraying pipe respectively under the action of high-pressure air, high-pressure water and the screw pump, performing water and gas mixing cleaning on the sediment tank 5, the spray head 9 and a slurry road 14, closing the cleaning machine 10 and the screw pump 7 in sequence after 15 seconds, and closing the cleaning air valve 8 and the dredging air valve after 6 seconds;
the quick cleaning comprises the following steps:
b1: slurry is discharged from the slurry path, the slurry discharge valve 4 is opened, the slurry discharge valve 6 is closed, the screw pump 7 is started, the screw pump 7 is reversed, slurry in the slurry path 14 is discharged into the stirring barrel 2, the screw pump 7 is closed, the slurry discharge valve 6 is opened, and under the action of gravity, residual slurry in the stirring barrel 2, the slag settling tank 5 and the slurry path 14 is discharged under the action of gravity;
b2: the pipelines of the stirring barrel 2 and the slag settling tank 5 are simply cleaned, the slurry discharge valve 4 is closed, the slurry discharge valve 6 is opened, the cleaning machine 10 is started, the cleaning air valve 8 is opened, water and air are sprayed into the screw pump, the water-gas mixture sequentially passes through the slurry path 14, the slag settling tank 5 and the slurry discharge valve 4 and is cleaned, finally the slurry discharge valve 4 is opened, the slurry discharge valve 6 is closed, the water-gas mixture is used for dredging and cleaning the filtering hole of the filtering device 3, and after 6 seconds, the slurry discharge valve 6 is opened and wastewater is discharged;
b3: cleaning the stirring barrel 2, opening the slurry discharge valve 4, closing the slurry discharge valve 6, feeding water to the stirring barrel 2, rapidly stirring the stirring barrel 2, cleaning the barrel wall, opening the slurry discharge valve 6 after cleaning, and discharging cleaning wastewater under the action of gravity;
b4: cleaning a screw pump 7 and a slurry path, closing a slurry discharge valve 4, opening a slurry discarding valve 6, opening a cleaning machine 10 to spray water to the screw pump 7, opening a cleaning air valve 8 to spray air to the screw pump 7, starting the screw pump 7, opening a dredging air valve 11, mixing water and air in the screw pump, cleaning the screw pump, spraying a cleaning wastewater and air mixture from a sediment tank 5 and a spray head 9 respectively so as to clean the slurry path 14, closing the cleaning machine 10 and the screw pump 7 in sequence after 6 seconds, stopping spraying water to the screw pump, closing the cleaning air valve 8 and the dredging air valve 11 after 3 seconds, and finishing quick cleaning;
the whole machine cleaning comprises:
c1: slurry is discharged from the slurry path, the slurry discharge valve 4 is opened, the slurry discharge valve 6 is closed, the screw pump 7 is started, the screw pump 7 is reversed, slurry in the slurry path 14 is discharged into the stirring barrel 2, the screw pump 7 is closed, the slurry discharge valve 6 is opened, and under the action of gravity, residual slurry in the stirring barrel 2, the slag settling tank 5 and the slurry path 14 is discharged under the action of gravity;
c2: the pipelines of the stirring barrel 2 and the slag settling tank 5 are simply cleaned, the slurry discharge valve 4 is closed, the slurry discharge valve 6 is opened, the cleaning machine 10 is started, the cleaning air valve 8 is opened, water and air are sprayed into the screw pump, the water-gas mixture sequentially passes through the slurry path 14, the slag settling tank 5 and the slurry discharge valve 4 and is cleaned, finally the slurry discharge valve 4 is opened, the slurry discharge valve 6 is closed, the water-gas mixture is used for dredging and cleaning the filtering hole of the filtering device 3, and after 6 seconds, the slurry discharge valve 6 is opened and wastewater is discharged;
c3: cleaning the stirring barrel 2, opening the slurry discharge valve 4, closing the slurry discharge valve 6, feeding water to the stirring barrel 2, rapidly stirring for 45 seconds by the stirring barrel 2, cleaning the barrel wall, opening the slurry discharge valve 6 after cleaning, discharging cleaning wastewater under the action of gravity, and performing the operation for three times;
c4: and (5) operating the 'slurry path cleaning', and finishing the cleaning of the whole machine.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the invention adopts the method of combining the slurry path cleaning, the rapid cleaning and the complete machine cleaning, so that the equipment and the slurry path can be cleaned timely, effectively and thoroughly under various conditions, thereby ensuring the continuous operation of the equipment and the slurry path, prolonging the service life of the spraying equipment and the slurry path, reducing the spraying cost and ensuring the spraying quality. The cleaning work in the invention adopts a full-automatic control mode, thereby greatly reducing the labor intensity of workers and ensuring the cleaning effect.
Drawings
Fig. 1 is a schematic structural view of a spray coating apparatus in an embodiment of the present invention.
In the figure: 1. the automatic metering and feeding device comprises an automatic metering and feeding device 2, a stirring barrel 23, a filtering device 4, a slurry discharge valve 5, a slag settling tank 6, a slurry discharge valve 7, a screw pump 8, a cleaning air valve 9, a spray head 10, a cleaning machine 11, a dredging air valve 12, a water source 13, an air source 14, an air path 15, a slurry path 16 and a water-gas filter.
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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an automatic metering and feeding device 1 is located above a stirring barrel, cement is provided for the stirring barrel 2, a filtering device 3 is arranged below the inside of the stirring barrel, the filtering device 3 is provided with a plurality of filtering holes, a slurry discharging valve 4 is connected below the stirring barrel 2, the slurry discharging valve 4 is connected with a slag settling tank 5, a slurry discarding valve 6 is connected below the slag settling tank, the slag settling tank 5 is communicated with a screw pump 7 through a slurry path 14, a feeding section of the screw pump 7 is connected with a water source 12 through a cleaning machine 10, a feeding section of the screw pump 7 is connected with a cleaning air valve 8 through a gas path 15, a discharging section of the screw pump is connected with a dredging air valve 11, the cleaning air valve 8 and the dredging air valve 11 are connected with a gas source 13 through a gas path 15, a spray head 9 is connected with the screw pump 7 through a slurry spraying pipe, and the spray head 9 is connected with the gas source 13 through a gas path 15.
Aiming at the equipment, the invention provides a cleaning method of full-automatic cement paste spraying equipment, which comprises the steps of slurry path cleaning, quick cleaning and complete machine cleaning; after each continuous spraying is finished, cleaning a slurry path of the spraying equipment to prevent slurry from depositing and blocking in the slurry path; when the spraying equipment is in short pause in the working process and the pause time is not more than the initial setting time of the cement paste (generally 45 minutes), the spraying equipment is quickly cleaned to ensure the spraying quality and prevent the deposition of the cement paste, and when the working is finished every day or the spraying equipment is not used for a long time, the whole machine cleaning is carried out on the spraying equipment to prevent the equipment from being blocked.
Wherein thick liquid way washs including:
a1, slurry discharging of the slurry path, opening a slurry discharging valve 4, closing a slurry discarding valve 6, starting a screw pump 7, reversing the screw pump 7, discharging slurry in the slurry path 14 into the stirring barrel 2, closing the screw pump 7, closing the slurry discharging valve 4, opening the slurry discarding valve 6, and discharging residual slurry in the slag basin 5 and the slurry path 14 under the action of gravity;
a2, slurry road water and gas mixing cleaning, closing a slurry discharge valve 4, opening a slurry discharge valve 6, opening a cleaning machine 10 to spray water to a screw pump 7, opening a cleaning air valve 8 to spray air to a feeding section of the screw pump 7, starting the screw pump 7, opening a dredging air valve 11 to spray air to a discharging section of the screw pump 7, allowing cleaning wastewater to flow out from the slurry discharge valve through a slurry sedimentation tank 5 and a spray head 9 through a slurry spraying pipe respectively under the action of high-pressure air, high-pressure water and the screw pump, performing water and gas mixing cleaning on the sediment tank 5, the spray head 9 and a slurry road 14, closing the cleaning machine 10 and the screw pump 7 in sequence after 15 seconds, and closing the cleaning air valve 8 and the dredging air valve after 6 seconds;
wherein quick washing includes:
b1: slurry is discharged from the slurry path, the slurry discharge valve 4 is opened, the slurry discharge valve 6 is closed, the screw pump 7 is started, the screw pump 7 is reversed, slurry in the slurry path 14 is discharged into the stirring barrel 2, the screw pump 7 is closed, the slurry discharge valve 6 is opened, and under the action of gravity, residual slurry in the stirring barrel 2, the slag settling tank 5 and the slurry path 14 is discharged under the action of gravity;
b2: the pipelines of the stirring barrel 2 and the slag settling tank 5 are simply cleaned, the slurry discharge valve 4 is closed, the slurry discharge valve 6 is opened, the cleaning machine 10 is started, the cleaning air valve 8 is opened, water and air are sprayed into the screw pump, the water-gas mixture sequentially passes through the slurry path 14, the slag settling tank 5 and the slurry discharge valve 4 and is cleaned, finally the slurry discharge valve 4 is opened, the slurry discharge valve 6 is closed, the water-gas mixture is used for dredging and cleaning the filtering hole of the filtering device 3, and after 6 seconds, the slurry discharge valve 6 is opened and wastewater is discharged;
b3: cleaning the stirring barrel 2, opening the slurry discharge valve 4, closing the slurry discharge valve 6, feeding water to the stirring barrel 2, rapidly stirring the stirring barrel 2, cleaning the barrel wall, opening the slurry discharge valve 6 after cleaning, and discharging cleaning wastewater under the action of gravity; the reason why the slurry discharge valve 4 needs to be opened when the stirring barrel 2 is cleaned is that if solid fragments exist in the stirring barrel cleaning process, the solid fragments can fall into the slag settling tank 5 and are discharged along with the wastewater;
b4: cleaning a screw pump 7 and a slurry path, closing a slurry discharge valve 4, opening a slurry discarding valve 6, opening a cleaning machine 10 to spray water to the screw pump 7, opening a cleaning air valve 8 to spray air to the screw pump 7, starting the screw pump 7, opening a dredging air valve 11, mixing water and air in the screw pump, cleaning the screw pump, spraying a cleaning wastewater and air mixture from a sediment tank 5 and a spray head 9 respectively, cleaning the slurry path 14, closing the cleaning machine 10 and the screw pump 7 in sequence after 6 seconds, stopping spraying water to the screw pump, closing the cleaning air valve 8 and the dredging air valve 11 after 3 seconds, and finishing quick cleaning.
Wherein the complete machine washs and includes:
c1: slurry is discharged from the slurry path, the slurry discharge valve 4 is opened, the slurry discharge valve 6 is closed, the screw pump 7 is started, the screw pump 7 is reversed, slurry in the slurry path 14 is discharged into the stirring barrel 2, the screw pump 7 is closed, the slurry discharge valve 6 is opened, under the action of gravity, residual slurry in the stirring barrel 2, the slag settling tank 5 and the slurry path 14 is discharged under the action of gravity, and slurry discharge from the slurry path is completed;
c2: the pipelines of the stirring barrel 2 and the slag settling tank 5 are simply cleaned, the slurry discharge valve 4 is closed, the slurry discharge valve 6 is opened, the cleaning machine 10 is started, the cleaning air valve 8 is opened, water and air are sprayed into the screw pump, the water-gas mixture sequentially passes through the slurry path 14, the slag settling tank 5 and the slurry discharge valve 4 and is cleaned, finally the slurry discharge valve 4 is opened, the slurry discharge valve 6 is closed, the water-gas mixture is used for dredging and cleaning the filtering holes of the filtering device 3, the filtering holes are prevented from being blocked, and after 6 seconds, the slurry discharge valve 6 is opened and wastewater is discharged;
c3: cleaning the stirring barrel 2, opening the slurry discharge valve 4, closing the slurry discharge valve 6, feeding water to the stirring barrel 2, rapidly stirring for 45 seconds by the stirring barrel 2, cleaning the barrel wall, opening the slurry discharge valve 6 after cleaning, discharging cleaning wastewater under the action of gravity, and performing the operation for three times;
c4: and (5) operating the 'slurry path cleaning', and finishing the cleaning of the whole machine.
Further, when the mixing drum is cleaned, the water quantity on the mixing drum is determined on the basis that water does not overflow from the mixing drum during rapid mixing, so that the drum wall is completely cleaned (generally 2/3 of the capacity of the mixing drum).
Further, when the mixing tank is cleaned, the mixing tank is filled with water and then starts to be mixed, and the duration time is generally 3 to 5 minutes according to the capacity and the shape of the mixing tank.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A cleaning method of full-automatic cement paste cleaning and spraying equipment is characterized in that in the full-automatic cement paste cleaning and spraying equipment, an automatic metering and feeding device (1) is positioned above a stirring barrel and provides cement for the stirring barrel (2), a filtering device (3) is arranged below the inside of the stirring barrel, the filtering device (3) is provided with a filtering hole, a slurry discharging valve (4) is connected below the stirring barrel (2), the slurry discharging valve (4) is connected with a slurry settling tank (5), a slurry discarding valve (6) is connected below the slurry settling tank, the slurry settling tank (5) is communicated with a screw pump (7) through a slurry path (14), a feeding section of the screw pump (7) is connected with a water source (12) through a cleaning machine (10), a feeding section of the screw pump (7) is connected with a cleaning air valve (8) through an air path (15), a discharging section of the screw pump is connected with a dredging air valve (11), the cleaning air valve (8) and the dredging air valve (11) are connected with an air source (13) through the air path (15), the spray head (9) is connected with the screw pump (7) through a guniting pipe, and the spray head (9) is connected with an air source (13) through an air path (15);
the method comprises the steps of pulp path cleaning, quick cleaning and complete machine cleaning; wherein,
the slurry path cleaning comprises the following steps:
a1, slurry discharging of the slurry path, opening a slurry discharging valve (4), closing a slurry discarding valve (6), starting a screw pump (7), reversing the screw pump (7), discharging slurry in the slurry path (14) into a stirring barrel (2), closing the screw pump (7), closing the slurry discharging valve (4), opening the slurry discarding valve (6), and discharging residual slurry in a slag basin (5) and the slurry path (14) under the action of gravity;
a2, slurry road water and gas mixing cleaning, closing a slurry discharge valve (4), opening a slurry discarding valve (6), opening a cleaning machine (10) to spray water to a screw pump (7), opening a cleaning air valve (8), spraying air to a feeding section of the screw pump (7), starting the screw pump (7), opening a dredging air valve (11) to spray air to a discharging section of the screw pump (7), respectively passing cleaning wastewater through a slurry discarding valve via a sedimentation tank (5) and flowing out from a spray head (9) via a slurry spraying pipe under the action of high-pressure air, high-pressure water and the screw pump, performing water and gas mixing cleaning on the sedimentation tank (5), the spray head (9) and a slurry road (14), closing the cleaning machine (10) and the screw pump (7) in sequence after 15 seconds, and closing the cleaning air valve (8) and the dredging air valve (11) after 6 seconds;
the quick cleaning comprises the following steps:
b1: slurry is discharged from the slurry path, the slurry discharge valve (4) is opened, the slurry discharge valve (6) is closed, the screw pump (7) is started to enable the screw pump (7) to rotate reversely, slurry in the slurry path (14) is discharged into the stirring barrel (2), the screw pump (7) is closed, the slurry discharge valve (6) is opened, and residual slurry in the stirring barrel (2), the slag settling tank (5) and the slurry path (14) is discharged under the action of gravity;
b2: the pipeline of the stirring barrel (2) and the sediment tank (5) is simply cleaned, the slurry discharge valve (4) is closed, the slurry discharge valve (6) is opened, the cleaning machine (10) is started, the cleaning air valve (8) is opened, water and air are sprayed into the screw pump, a water-gas mixture sequentially passes through the slurry path (14), the sediment tank (5) and the slurry discharge valve (4) and is cleaned, finally the slurry discharge valve (4) is opened, the slurry discharge valve (6) is closed, the water-gas mixture dredges and cleans the filtering hole of the filtering device (3), and after 6 seconds, the slurry discharge valve (6) is opened and wastewater is discharged;
b3: cleaning the stirring barrel (2), opening the slurry discharge valve (4), closing the slurry discharge valve (6), feeding water to the stirring barrel (2), quickly stirring the stirring barrel (2), cleaning the barrel wall, opening the slurry discharge valve (6) after cleaning is finished, and discharging cleaning wastewater under the action of gravity;
b4: cleaning a screw pump (7) and a slurry path, closing a slurry discharge valve (4), opening a slurry discarding valve (6), opening a cleaning machine (10) to spray water to the screw pump (7), opening a cleaning air valve (8) to spray air to the screw pump (7), starting the screw pump (7), opening a dredging air valve (11), mixing the water and the air in the screw pump, cleaning the screw pump, respectively spraying cleaning wastewater and air mixture from a slag settling tank (5) and a spray head (9), so as to clean the slurry path (14), closing the cleaning machine (10) and the screw pump (7) in sequence after 6 seconds, stopping spraying water to the screw pump, closing the cleaning air valve (8) and the dredging air valve (11) after 3 seconds, and finishing quick cleaning;
the whole machine cleaning comprises:
c1: slurry is discharged from the slurry path, the slurry discharge valve (4) is opened, the slurry discharge valve (6) is closed, the screw pump (7) is started to enable the screw pump (7) to rotate reversely, slurry in the slurry path (14) is discharged into the stirring barrel (2), the screw pump (7) is closed, the slurry discharge valve (6) is opened, and residual slurry in the stirring barrel (2), the slag settling tank (5) and the slurry path (14) is discharged under the action of gravity;
c2: the pipeline of the stirring barrel (2) and the sediment tank (5) is simply cleaned, the slurry discharge valve (4) is closed, the slurry discharge valve (6) is opened, the cleaning machine (10) is started, the cleaning air valve (8) is opened, water and air are sprayed into the screw pump, a water-gas mixture sequentially passes through the slurry path (14), the sediment tank (5) and the slurry discharge valve (4) and is cleaned, finally the slurry discharge valve (4) is opened, the slurry discharge valve (6) is closed, the water-gas mixture dredges and cleans the filtering hole of the filtering device (3), and after 6 seconds, the slurry discharge valve (6) is opened and wastewater is discharged;
c3: cleaning the stirring barrel (2), opening the slurry discharge valve (4), closing the slurry discharge valve (6), feeding water to the stirring barrel (2), quickly stirring the stirring barrel (2) for 45 seconds, cleaning the barrel wall, opening the slurry discharge valve (6) after cleaning, discharging cleaning wastewater under the action of gravity, and performing the operation for three times;
c4: and (5) operating the 'slurry path cleaning', and finishing the cleaning of the whole machine.
2. The method of claim 1, wherein the slurry path cleaning is performed on the spraying equipment after each continuous spraying.
3. The method for cleaning a full automatic cement paste spraying equipment according to claim 1, wherein when the spraying equipment is in a short pause and the pause time does not exceed the initial setting time of the cement paste, the spraying equipment is rapidly cleaned to ensure the spraying quality and prevent the mud from depositing.
4. The method for cleaning the full-automatic cement paste spraying equipment according to claim 1, wherein when the work is finished every day or the spraying equipment is not used for a long time, the whole spraying equipment is cleaned, so that the equipment is prevented from being blocked.
5. The method for cleaning the full-automatic cement paste spraying equipment according to claim 1, wherein when the stirring barrel is cleaned, the water feeding amount of the stirring barrel is ensured to be complete and thorough on the premise that water does not overflow from the stirring barrel when the stirring is rapidly carried out, namely, the water feeding amount of the stirring barrel is 2/3 of the capacity of the stirring barrel.
6. The cleaning method of the full-automatic cement paste spraying equipment according to claim 1, wherein when the stirring barrel is cleaned, stirring is started after the stirring barrel is filled with water, and the duration is 3-5 minutes.
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| US9796003B2 (en) * | 2014-04-14 | 2017-10-24 | U.S Submergent Technologies, Llc | Dripless expanding tubes for combination truck |
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