CN114833933A - Maintenance process for cement mortar lining of nodular cast iron pipe - Google Patents
Maintenance process for cement mortar lining of nodular cast iron pipe Download PDFInfo
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- CN114833933A CN114833933A CN202210322644.7A CN202210322644A CN114833933A CN 114833933 A CN114833933 A CN 114833933A CN 202210322644 A CN202210322644 A CN 202210322644A CN 114833933 A CN114833933 A CN 114833933A
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- 239000011083 cement mortar Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 54
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 52
- 238000012423 maintenance Methods 0.000 title claims abstract description 49
- 230000008569 process Effects 0.000 title claims abstract description 43
- 238000000576 coating method Methods 0.000 claims abstract description 18
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000006703 hydration reaction Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 14
- 239000004568 cement Substances 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000010865 sewage Substances 0.000 claims description 4
- 238000005056 compaction Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001723 curing Methods 0.000 description 52
- 238000001514 detection method Methods 0.000 description 16
- 229910001018 Cast iron Inorganic materials 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 11
- 230000036541 health Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000003825 pressing Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000036964 tight binding Effects 0.000 description 2
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000013035 low temperature curing Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/0063—Control arrangements
- B28B17/0081—Process control
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Structural Engineering (AREA)
- Automation & Control Theory (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a maintenance process for a cement mortar lining of a nodular cast iron pipe, and relates to the technical field of maintenance of the cement mortar lining of the nodular cast iron pipe. According to the maintenance process for the cement mortar lining of the nodular cast iron pipe, after the mortar lining of the nodular cast iron pipe is centrifugally compacted, the socket and the spigot of the nodular cast iron pipe are respectively sealed by the maintenance cover, no moisture volatilizes outwards under the sealing effect of the maintenance cover, moisture does not volatilize after the internal maintenance environment humidity in the cavity of the cast pipe reaches saturation, cracks and bulges of the mortar coating caused by drying shrinkage are avoided, meanwhile, sufficient moisture in the cement mortar is ensured to carry out hydration reaction, and good strength is realized.
Description
Technical Field
The invention relates to the technical field of curing of cement mortar linings of cast iron pipes, in particular to a curing process of cement mortar linings of ductile cast iron pipes.
Background
The ductile iron pipe industry in China starts in the early 90 s of the 20 th century, develops rapidly under the strong support of the water supply association in China, and is generally accepted by the water supply industry in safety and practicability after practical use for nearly 30 years. According to incomplete statistics, the total amount of the centrifugal ductile iron pipes in 2017 reaches 633.09 ten thousand tons, and 54 ten thousand tons are exported. The water source of China is less, the water delivery distance is far, and when the service life of 100 years is provided, the cast iron pipes (the nodular cast iron pipes and the gray cast iron pipes) still have own advantages, particularly greater advantages. The quality of the cast iron pipe needs to be maintained and further improved through innovation, and the production cost is reduced, so that the method is the only way for occupying the market.
The cement mortar lining coating of the nodular cast iron pipeline mainly plays roles in isolating and conveying media and preventing corrosion, and the quality of the lining coating directly influences the conveying efficiency and the service life of the pipeline. In the traditional natural curing or low-temperature curing, the curing temperature is low and is generally 35-45 ℃, the temperature rise is slow and is generally 4-5 h, and the heat preservation time is longer than 4h, so that the whole period is long, the product is influenced to enter the next process quickly, and the production efficiency of an enterprise is low; meanwhile, cement mortar is not fully hydrated in the traditional maintenance process, the strength development is not good, the risk of later-stage coating shelling and cracking is high, and the product quality and the service life are influenced. Therefore, after the cement mortar lining is centrifugally compacted, how to maintain has great influence on the production efficiency and the lining quality, and meanwhile, the final strength, the apparent quality, whether the cement mortar lining has shell or cracks and the relationship between the environmental humidity and the temperature during the maintenance is great.
In order to improve the production efficiency of enterprises and ensure that the temperature of the mortar lining of the nodular cast iron pipe at each stacking position during maintenance meets the maintenance requirement and a good maintenance effect, the convenience of detection operation and analysis is considered. The invention discloses a rapid curing process method for a cement mortar lining of a nodular cast iron pipe.
Disclosure of Invention
Technical problem to be solved
The lining maintenance of the nodular cast iron pipe in the industry at present mainly comprises low-temperature maintenance or normal-temperature natural maintenance in a maintenance bin, a pool or a furnace, and in order to ensure that the strength of the mortar lining meets the requirement and no appearance quality defect exists subsequently, the total maintenance time is as long as 12 hours, and the production efficiency and the cost of an enterprise are influenced. Meanwhile, blast furnace steam is generally conveyed during maintenance, so that the effects of supplying heat and humidity to the environment are achieved. The existing health preserving temperature detection and control method mainly comprises the steps that 1-2 thermocouples are installed in a health preserving area, the environment temperature of a fixed area during health preserving is detected, and a control program adjusts the opening degree of a steam proportional valve in real time to adjust the temperature by comparing the detected temperature with a target temperature. The thermocouple temperature measurement is only carried out at a single point, and can only show the temperature condition at a certain position in a certain space, so that the representativeness is insufficient, otherwise, a plurality of thermocouples need to be installed, and the cost, the construction and the daily inspection and maintenance are troublesome; the temperature measured by the thermocouple is the ambient temperature, and if the layout of the steam pipeline is not proper, the steam pipeline is easily disturbed by hot steam during the curing, so that the actual ratio detection value is higher, and the temperature in the whole curing process is out of control; and moreover, the thermocouple cannot detect the actual temperature of the nodular cast iron pipe cement mortar in different stacking positions during curing, and the curing temperature cannot be accurately controlled. Most of the coatings can not ensure the stability of the curing temperature, and the cement mortar lining coating with high strength and good appearance can be obtained.
(II) technical scheme
In order to solve the problems, the invention provides a curing process method for a cement mortar lining of a cast iron pipe and a temperature measuring device corresponding to curing temperature. The maintenance process comprises the steps of sealing two ends of a nodular cast iron pipe with an inner coating to ensure that the internal water is not lost outwards in the whole maintenance process, sending the cast iron pipe into a maintenance area after sealing, completing maintenance within a short time according to a certain temperature requirement, and then quickly entering the next procedure, wherein the maintenance is completed within 7 hours generally for special cement, and the maintenance is completed within 8 hours for ordinary cement. A button formula thermoscope for maintenance temperature detects, a magnet chucking buckle, and magnet chucking buckle has spring hold-down structure. Magnet chucking buckle adsorbs at nodular cast iron pipe inner wall, through spring hold-down structure with button thermoscope top close paste apply on cement mortar inside lining surface, and then realize the collection and the record of mortar coating temperature. And subsequently, professional software is matched to export and analyze all recorded temperature data one by one, so that the real curing temperature of the cement mortar coating in the curing process is known, and the instructional opinions are given to the temperature setting and control of the curing process.
The traditional lining maintenance process is changed from the original open type, low-temperature and long-time maintenance to the sealed type, high-temperature and short-time quick maintenance, and the apparent quality and the strength of the mortar lining are obviously improved. Meanwhile, the traditional health-care temperature detection mode is changed, the original online fixed temperature measurement is changed into offline movable temperature measurement, one-time multipoint and multi-position simultaneous detection can be realized, and the equipment can be recycled; disturbance caused by any steam operation in a curing space is avoided, the environment temperature during curing is not detected simply, the temperature of the cement mortar lining coating during curing is detected directly, and the real condition that the curing process temperature falls on a target object is reflected more truly; the temperature data can be rapidly read by matching with software, the temperature change condition is analyzed, and basic data is provided for the analysis and improvement of the health preserving process. The specific scheme is as follows:
a process for curing a cement mortar lining of a nodular cast iron pipe is used for curing the cement mortar lining on the inner wall of the nodular cast iron pipe and comprises the following steps:
the method comprises the following steps: after the mortar lining of the nodular cast iron pipe is centrifugally compacted, the bell mouth and the spigot of the nodular cast iron pipe are respectively sealed by the curing cover, no moisture volatilizes under the sealing action of the curing cover, the moisture does not volatilize after the humidity of the internal curing environment of the cavity of the nodular cast iron pipe reaches saturation, cracks and bulges of a mortar coating caused by drying shrinkage are avoided, and meanwhile, sufficient moisture in the cement mortar is ensured to carry out hydration reaction, so that good strength is realized;
step two: feeding the mixture into a curing area for natural curing for A hours, and then heating the mixture to a standard temperature for heat preservation and curing for B hours;
step three: and finishing the maintenance of the cement mortar lining of the nodular cast iron pipe after the accumulated maintenance time reaches C hours.
Preferably, the temperature measuring device is arranged on the cement mortar after the centrifugal compaction of the mortar lining of the nodular cast iron pipe is finished, and the temperature of the mortar lining is monitored through the temperature measuring device.
Preferably, the temperature measuring device includes magnet chucking knot, spring and temperature measurement module, the bottom that the magnet chucking was detained is provided with the mounting groove, there is the temperature measurement module through spring coupling in the mounting groove, the natural length of spring is greater than the height of mounting groove, the temperature measurement module includes remote signal transmission module for the temperature information of transmission mortar inside lining.
Preferably, A is 0-4.
Preferably, B is 2-5.
Preferably, C is 7-9.
Preferably, if the cement mortar is common cement mortar, the temperature is increased to the standard temperature at the speed of less than 20 ℃ per hour in the step two; if the cement mortar is sewage cement, the temperature is raised to the standard temperature within 1-2 hours.
Preferably, when the type of the ductile cast iron pipe is DN 100-DN 300, the diameter of the socket health-preserving cover is 160-700 mm, and the diameter of the socket health-preserving cover is 110-620 mm;
when the type of the ductile cast iron pipe is DN 350-DN 600, the diameter of the socket health-preserving cover is 450-1000 mm, and the diameter of the socket health-preserving cover is 380-1000 mm;
when the type of the ductile cast iron pipe is DN 700-DN 1000, the diameter of the socket health-preserving cover is 820-1500 mm, and the diameter of the socket health-preserving cover is 730-1400 mm.
(III) advantageous effects
The invention provides a maintenance process for a cement mortar lining of a nodular cast iron pipe. The method has the following beneficial effects:
the maintenance process for the cement mortar lining of the nodular cast iron pipe can better utilize blast furnace steam of an enterprise, can accelerate the cement hydration process, enables the cement mortar coating to obtain better strength and apparent quality in a short time, ensures that the nodular cast iron pipe can quickly enter the next procedure, improves the production efficiency of the enterprise, and reduces the comprehensive cost. The temperature measuring device main body is a stainless steel magnet clamping buckle, and has the advantages of good hardness, wear resistance, corrosion resistance, small size and convenience. When the button temperature measuring instrument is actually used, the button temperature measuring instrument at the bottom of the temperature measuring device is just opposite to a surface to be measured, and is pressed by the spring pressing structure to be tightly attached to the surface of an object to be measured under the action of attraction force between the cast iron pipe wall and the magnet, so that real-time temperature detection and recording are realized. The temperature measuring device has the advantages of small volume, light weight and convenient use, and can detect the temperature of the inner wall (cement mortar lining) and the outer wall (cast pipe) of the cast iron pipe at any position in the health maintenance space; the installation is that the magnet is adsorbed on the inner wall and the outer wall of the cast iron pipe for fixation, the attraction force is large, the fixation is firm, and the temperature of any point of the nodular cast iron pipe can be detected; because the detection principle is contact temperature measurement, the temperature measurement device can directly detect the temperature of the cement mortar lining during curing after being installed in place, reflect the real temperature condition of the curing process and provide test data for the analysis and improvement of the curing process; after the equipment is taken out after the detection is finished, data are exported, and the temperature measuring device can be continuously used for temperature detection of the next health-preserving circulation. The invention has simple design and convenient operation and use, is beneficial to improving the curing temperature control precision of the cement mortar lining coating, the coating quality and the production efficiency of enterprises, and can effectively reduce the production cost of the enterprises.
Drawings
FIG. 1 is a schematic view of a curing structure according to the present invention;
FIG. 2 is a schematic structural diagram of a temperature measuring device according to the present invention.
In the figure: 3. the magnet is clamped and buckled; 4. a spring; 5. and a temperature measuring module.
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.
The health preserving cover is generally made of various plastic films and bags such as PVC and the like or plastic woven bags such as PE, PP and the like; the health-preserving cover is fixed in a belt binding mode, an adhesive tape binding mode and a tight binding mode of an embedded rubber band sleeve.
The dimension of the health preserving cover is designed according to the diameters of pipe bearings and sockets with different calibers, and the following requirements are met:
the new curing process is that the cast pipe mortar lining is centrifugally compacted and then is immediately sealed and sent into a curing area, the curing area is naturally cured for 0-4 hours after being filled, then common cement mortar is heated to the standard temperature at the speed of less than 20 ℃/hour, and sewage cement is heated to the standard temperature within 1-2 hours for heat preservation and curing.
The standard temperature of the claim is 50-70 ℃ for ordinary cement mortar and 60-70 ℃ for sewage cement mortar. The heat preservation curing time is generally 2h-5h, and the total curing time is generally 7h-9h.
The whole mortar temperature testing device during maintenance is formed by combining a magnet clamping buckle, a spring pressing structure (spring) and a button temperature measuring instrument (temperature measuring module).
The button thermodetector is installed and used by pressing the spring to contract, deform, push tightly and fixedly through attraction between the magnet clamping buckle and the inner wall of the ball-milling cast iron pipe, and contact type temperature measurement is achieved.
After the detection is finished, the detection data of the button thermodetector can be exported and analyzed by using special software, and after the data is exported, the temperature acquisition interval can be reset according to needs to perform the temperature detection of the next health-preserving cycle again.
The common cement mortar lining types, corresponding to the outer diameter of a cast pipe, and the sand-cement ratio, the water-cement ratio and the lining thickness during batching are shown in the following table; after the centrifugal compaction is finished, the water cement ratio of the cement mortar lining is generally within 0.25.
After centrifugation is finished, the two ends of a socket of the cast tube are sealed by a health-preserving cover manually, the health-preserving cover is made of various plastic films and bags such as PVC (polyvinyl chloride) or plastic woven bags such as PE (polyethylene) and PP (polypropylene), and the health-preserving cover and the cast tube are fixed in a belt binding mode, an adhesive tape binding mode and an embedded rubber band sleeve tight binding mode. In view of safety and convenience in operation, the new curing process is applied to DN1000 tube.
After the sealed cast pipes are piled up in a curing area, curing is carried out according to a specific curing process by blast furnace steam heat supply, and the specific sealing and curing process is as follows:
after the maintenance is finished, the cast tube is transported out of the maintenance area by using a forklift or a travelling crane, and the maintenance cover is manually removed and collected for recycling. The cement mortar lining curing process is directly related to the strength and the apparent mass of the lining, the most direct expression is the lining shelling rate, according to the data tracking of daily industrial use, the comprehensive shelling rate under the sealing curing process of a common cement mortar lining (OPC, BFSC, SRC) is about 0.2%, the comprehensive shelling rate under the sealing curing process of a common cement mortar lining is generally between 2% and 5%, and the shelling rate under the sealing curing process of an HAC cement mortar lining is 0%.
In conclusion, the maintenance process for the cement mortar lining of the nodular cast iron pipe can better utilize blast furnace steam of enterprises, can accelerate the hydration process of cement, ensures that the cement mortar coating obtains better strength and apparent quality in a short time, ensures that the nodular cast iron pipe can quickly enter the next procedure, improves the production efficiency of the enterprises, and reduces the comprehensive cost. The temperature measuring device main body is a stainless steel magnet clamping buckle, and has the advantages of good hardness, wear resistance, corrosion resistance, small size and convenience. When the button temperature measuring instrument is actually used, the button temperature measuring instrument at the bottom of the temperature measuring device is just opposite to a surface to be measured, and is pressed by the spring pressing structure to be tightly attached to the surface of an object to be measured under the action of attraction force between the cast iron pipe wall and the magnet, so that real-time temperature detection and recording are realized. The temperature measuring device has the advantages of small volume, light weight and convenient use, and can detect the temperature of the inner wall (cement mortar lining) and the outer wall (cast pipe) of the cast iron pipe at any position in the health maintenance space; the installation is that the magnet is adsorbed on the inner wall and the outer wall of the cast iron pipe for fixation, the attraction force is large, the fixation is firm, and the temperature of any point of the nodular cast iron pipe can be detected; because the detection principle is contact temperature measurement, the temperature measurement device can directly detect the temperature of the cement mortar lining during curing after being installed in place, reflect the real temperature condition of the curing process and provide test data for the analysis and improvement of the curing process; after the equipment is taken out after the detection is finished, data are exported, and the temperature measuring device can be continuously used for temperature detection of the next health-preserving circulation. The invention has simple design and convenient operation and use, is beneficial to improving the curing temperature control precision of the cement mortar lining coating, the coating quality and the production efficiency of enterprises, and can effectively reduce the production cost of the enterprises.
It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships that are used for explaining structures of the present invention based on the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the technical scheme, the terms "first" and "second" are only used for referring to the same or similar structures or corresponding structures with similar functions, and are not used for ranking the importance of the structures, or comparing the sizes or other meanings.
In addition, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two structures can be directly connected or indirectly connected through an intermediate medium, and the two structures can be communicated with each other. To those skilled in the art, the specific meanings of the above terms in the present invention can be understood in light of the present general concepts, in connection with the specific context of the scheme.
Claims (8)
1. A maintenance process of a cement mortar lining of a nodular cast iron pipe is used for maintaining the cement mortar lining of the inner wall of the nodular cast iron pipe and is characterized in that: the method comprises the following steps:
the method comprises the following steps: after the mortar lining of the nodular cast iron pipe is centrifugally compacted, the bell mouth and the spigot of the nodular cast iron pipe are respectively sealed by the curing cover, no moisture volatilizes under the sealing action of the curing cover, the moisture does not volatilize after the humidity of the internal curing environment of the cavity of the nodular cast iron pipe reaches saturation, cracks and bulges of a mortar coating caused by drying shrinkage are avoided, and meanwhile, sufficient moisture in the cement mortar is ensured to carry out hydration reaction, so that good strength is realized;
step two: feeding the mixture into a curing area for natural curing for A hours, and then heating the mixture to a standard temperature for heat preservation and curing for B hours;
step three: and finishing the maintenance of the cement mortar lining of the nodular cast iron pipe after the accumulated maintenance time reaches C hours.
2. The maintenance process of the cement mortar lining of the nodular cast iron pipe as claimed in claim 1, wherein: and after the centrifugal compaction of the mortar lining of the nodular cast iron pipe is finished, the temperature measuring device is arranged on the cement mortar, and the temperature of the mortar lining is monitored through the temperature measuring device.
3. The maintenance process of the cement mortar lining of the nodular cast iron pipe as claimed in claim 1, wherein: temperature measuring device includes magnet chucking knot (3), spring (4) and temperature measurement module (5), the bottom of magnet chucking knot (3) is provided with the mounting groove, be connected with temperature measurement module (5) through spring (4) in the mounting groove, the natural length of spring (4) is greater than the height of mounting groove, temperature measurement module (5) include remote signal transmission module for the temperature information of transmission mortar inside lining.
4. The curing process of the ductile cast iron pipe cement mortar lining as claimed in claim 1, characterized in that: a is 0-4.
5. The maintenance process of the cement mortar lining of the nodular cast iron pipe as claimed in claim 1, wherein: and B is 2-5.
6. The maintenance process of the cement mortar lining of the nodular cast iron pipe as claimed in claim 1, wherein: and C is 7-9.
7. The maintenance process of the cement mortar lining of the nodular cast iron pipe as claimed in claim 1, wherein: if the cement mortar is common cement mortar, the temperature is increased to the standard temperature at the speed of less than 20 ℃ per hour in the second step; if the cement mortar is sewage cement, the temperature is raised to the standard temperature within 1-2 hours.
8. The maintenance process of the cement mortar lining of the nodular cast iron pipe as claimed in claim 1, wherein:
when the type of the ductile cast iron pipe is DN 100-DN 300, the diameter of the socket health-preserving cover is 160-700 mm, and the diameter of the socket health-preserving cover is 110-620 mm;
when the type of the ductile cast iron pipe is DN 350-DN 600, the diameter of the socket health-preserving cover is 450-1000 mm, and the diameter of the socket health-preserving cover is 380-1000 mm;
when the type of the ductile cast iron pipe is DN 700-DN 1000, the diameter of the socket health-preserving cover is 820-1500 mm, and the diameter of the socket health-preserving cover is 730-1400 mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115893960A (en) * | 2022-11-03 | 2023-04-04 | 新兴铸管股份有限公司 | Mortar lining material, nodular cast iron pipe lining for sewage and manufacturing method of mortar lining material and nodular cast iron pipe lining |
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