Lanyun Pipeline Engineering(Shanghai) Co.,Ltd. Spraying machine instructions
Cement mortar lining for water supply pipeline
1．Preface
In order to extend the service life of the steel pipe for water supply, pipeline protection is not corrosive media, keep the water transport capacity, so on steel pipe by cement mortar lining anticorrosion, of inner wall of steel pipe and conveying water medium physical isolation anti corrosion protection layer and cement mortar lining has the following a few significant advantages:1、To avoid the formation of corrosion rust on the inner wall of the pipeline, so that the pipeline can maintain a good water delivery condition for a long time, and the coefficient of friction is small.2、Due to the isolation of the lining coating, the water body is not in contact with the metal pipe to ensure the water quality.3、The inner wall of the pipeline is prevented from corrosion by the cement mortar, which prevents the corrosion perforation and prolongs the service life of the pipeline.4、Cement mortar lining for steel pipe, a certain thickness of mortar lining, can improve the rigidity of the steel pipe, reduce the wall thickness of steel plate, reduce the cost of pipeline project. In order to ensure the construction quality of cement mortar lining, we make a special order to ensure the quality of construction.CECS10：89National standard。
2．quality standard
2．1 All use of construction《For buried steel water pipeline of cement mortar lining standard》CECS10：89
2．2 According to CECS10：89 Standard thickness
Ф500~Ф700 8mm +2/-2
Ф800~Ф1000 10mm +2/-2
Ф400 6.4+3.2mm AWWAC602-83 standard
2．3 The coating surface should be smooth and continuous, no leakage, no hollowing, no gel coated sand.
2．4 Repair manual lining, to smooth feel the feeling of sand.
2．5 Material Science：
Lanyun Pipeline Engineering(Shanghai) Co.,Ltd. Spraying machine instructions
2．5．1 Cement should be used in line with national standards《Portland cement Portland cement》（GB175-85）Cement label31.5MPa，或41.5MPa. As the first cement conch cement or close to other cement in line with national standards.
2．5．2 Sand particles should be hard, clean, well graded, should be in accordance with《Quality standard and test method of sand for ordinary concrete》JGJ52-79，The total weight of soil, mica, organic impurities and other harmful substances in the sand.2%. Must use the screen before use. The screen14目。
2．5．3 Water quality of mortar must be clean and must not contain soil, oil, acid and alkali and organic matter.
3．1 Preparation before construction
3．1．1 Prior to the construction of the lining, inside the pipe to clean, remove loose oxide scale, rust, dirt, grease, welding slag, dirt and other attachments.
3．1．2 The deformation of the lining steel pipe shall be checked before the lining construction, and the maximum vertical displacement of the lining pipe shall not be greater than that of the design rules.2%。
3．1．3 Before the construction of the lining, the generator, the lining machine, the mixer will be placed in the proper position. Construction equipment: by PPJ7080 A spray,30KVAthree-phase380Vdiesel generators，0.2mortar mixer,and lighting1000Wiodine lamp 2only，1.5A pump and other components.
3．1．4 Purchase and storage of cement，Should not let it be affected with damp，The first is the conch cement 41.5MPa Or the national standard 41MPa cement。
3．1．5 The purchase of clean sand, the sand will be used 14 mesh screen.
3．1．6 Choice of water sources do not contain soil, oil, acid, organic matter.
Lanyun Pipeline Engineering(Shanghai) Co.,Ltd. Spraying machine instructions
4．1 Spraying and construction
4．1．1 The ratio of1：1.15~1：1.2 Mix the cement and the mortar into the mixer, and then mix in the water. Consistency of mortar80About the slump. Mortar should be used before the initial setting.
4．1．2 The mixing mortar spraying machine of slurry storage barrel of joining, increased to 8 minutes, spraying machine is by the injection kW, send 1.5 kW plasma motor and driving motor 1.5 and lighting MES new Roman'; mso-hansi-font-family:'Times new Roman' "> and lighting and other four parts dynamic mechanism composed of. It uses the principle of screw conveyor to send mortar from the slurry storage tank to the spray head, scattering mortar particles around the pipe wall, and achieve the purpose of spraying.
Machine in the pipeline construction, can quickly open the machine to spray coating, then shift the gears, adjust the potentiometer to zero, and then start the slurry feeding motor while stirring, side of the mortar is delivered to a spray head. Pressed under the nozzle button, mortar by the high-speed rotation of the nozzle through the leaves port injection to around a tube wall, the whole slowly backwards. At this time, the cement slurry is stacked on the wall, and then slow to form a smooth coating of cement mortar.
The whole process is controlled by the operator to control the feeding, spraying, walking, three aspects of the action.
When the whole machine is running slowly, the operator should tell the line outside the line, and the phase of spraying operation has begun. When a bucket of pulp after spray, the machine can walk quickly to the bottom, add paste. However, in the second barrels of plasma spraying, ahead of the 20 cm shotcrete, the pulp capacity from less to lap to organically connect the. So, according to the action and complete the whole process of spraying.
4．1．3 The thickness of the coating must meet the design requirements.
5．1 curing
Lanyun Pipeline Engineering(Shanghai) Co.,Ltd. Spraying machine instructions
5．1．1 In the lining of single section ends with plastic film sealing maintenance.
5．1．2 After the pipe section lining cement mortar reaches final setting, water maintenance must be carried out immediately, and the wet condition of the lining should be kept in 7 days. Maintenance period in the pipe section should be strictly closed, when the maintenance period, the water should be filled with water in a timely manner.
6．1 quality requirement
6．1．1 Coating thickness must meet the design requirements, the use of drilling method, detection, measurement method with reference to CSCE10:89 4.0.2.
6．1．3 The crack caused by shrinkage of cement mortar lining, when its width is less than or equal to 1.6mm, and the axial length of the pipeline is not larger than the circumferential length of the pipe and can not be repaired when the length of the pipe is not larger than 5mm. When the crack width is greater than 1.6mm, after strengthening the maintenance of cracks can automatically heal, can be considered qualified.
6．1．4 The surface defects of cement mortar lining (pits, sand hole, empty nest etc.). Each individual must not be greater than 5 cm2 defect depth is not greater than 2mm.
6．1．5 The hand hammer to tap a lining surface hollowing sound judgment. Each area of hollowing should not be greater than 400cm2。
6．1．6 Surface should be smooth
7．1 Repair
The unqualified surface defects, cracks, hollowing etc.. Must be carefully repaired. Repair of the material, with double and so should be the same as the original. And repair the maintenance.
8．1 security
Must be safe operation in construction, to enter the site should be dressed in overalls and ppe.
Construction must be civilized construction.
Lanyun Pipeline Engineering(Shanghai) Co.,Ltd. Spraying machine instructions
Must stick to their posts, not to leave their posts without permission.
Mixer operation, any tools shall not extend into the mixer barrel, in order to avoid danger.
9．1 Washing and maintenance
Machines must be flushed to the machine in each shift.
The machine must check the maintenance oil before construction, to ensure the normal operation of the machine can.
10．1 Work place cleaning
After the end of each construction, must be the Qing scene, not omission of construction tools, keep the construction site clean.
Note: this provision refers to theCECS10：89
Lanyun Pipeline Engineering(Shanghai) Co.,Ltd.
二00五年四月
