CN117823716A - Steam boiler pipeline installation construction method - Google Patents
Steam boiler pipeline installation construction method Download PDFInfo
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- CN117823716A CN117823716A CN202410252663.6A CN202410252663A CN117823716A CN 117823716 A CN117823716 A CN 117823716A CN 202410252663 A CN202410252663 A CN 202410252663A CN 117823716 A CN117823716 A CN 117823716A
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- 238000009434 installation Methods 0.000 title claims abstract description 37
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 239000004568 cement Substances 0.000 claims abstract description 107
- 239000002689 soil Substances 0.000 claims abstract description 62
- 239000003673 groundwater Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 230000007797 corrosion Effects 0.000 claims abstract description 10
- 238000005260 corrosion Methods 0.000 claims abstract description 10
- 238000010586 diagram Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000012876 topography Methods 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 claims description 19
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 9
- 238000007711 solidification Methods 0.000 claims description 7
- 230000008023 solidification Effects 0.000 claims description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000004035 construction material Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000011990 functional testing Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000007789 sealing Methods 0.000 abstract description 3
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 239000010881 fly ash Substances 0.000 description 6
- 230000008595 infiltration Effects 0.000 description 6
- 238000001764 infiltration Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 4
- 238000004321 preservation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The invention discloses a steam boiler pipeline installation construction method, and relates to the technical field of boiler steam pipeline installation. The method comprises the following steps: the method comprises the following steps: step one: confirming construction sites, namely collecting site selection land topography information, soil condition information and groundwater level information, obtaining site selection land foundation information sets, and confirming the construction sites according to the site selection land foundation information sets, wherein the soil condition information comprises soil component parameters, soil mechanical parameters and soil corrosion parameters, and step two: and designing pipeline wiring, and designing a pipeline wiring diagram according to the steam input position and the steam demand position. The invention performs sealing backfilling operation on the top of the paving groove by digging the paving groove, the water seepage groove, the water storage groove and the like, and performs cement pouring on the paving groove, thereby ensuring the integral sealing performance of the paving groove, letting the boiler steam pipeline radiate heat, improving the pressure near the pipeline and inhibiting the groundwater in the water storage groove under the pressure effect.
Description
Technical Field
The invention relates to the technical field of boiler steam pipeline installation, in particular to a steam boiler pipeline installation construction method.
Background
The steam boiler pipe refers to a pipe system connecting a steam boiler and steam using equipment, in a city with high density and limited land resources, the floor space of a building is limited, a steam boiler machine room cannot be accommodated, in order to save the floor space to the greatest extent, the steam boiler is considered to be installed underground, in addition, in special places such as petrochemical plants, chemical laboratories or military facilities, the steam boiler can be regarded as potential safety risk, and the installation of the steam boiler underground can reduce direct exposure to external environment and provide higher safety guarantee.
The underground steam pipeline with the heat-insulating waterproof jacket with the authorized bulletin number CN201007416Y is manufactured into a semicircular heat-insulating pipe shell by utilizing the condensation property of the fly ash, when in use, one half of the heat-insulating pipe shell is arranged at the lower side of the steam pipeline, the other half of the heat-insulating pipe shell is arranged at the upper side of the steam pipeline, and then the periphery of the heat-insulating pipe shell is filled with the fly ash or sand scattered materials, so that the heat-insulating function of the underground steam pipeline is realized, but the heat-insulating pipe shell is easily corroded by underground water, while the fly ash has good condensation property, the same breaking speed after meeting water is faster, the fly ash is more alkaline after being mixed with water, and the fly ash has quite corrosiveness, so that the heat-insulating pipe shell is not suitable for long-term installation of the underground steam pipeline;
the steam pipeline underground buried structure with the authorized bulletin number of CN 206001105U is solidified through the outer wall of the steam pipeline to form a fly ash layer protection shell with heat preservation and waterproof effects, and the outside aluminum silicate layer and the rock wool layer form double-layer protection, so that the double heat insulation and heat preservation effects are achieved, and the E-shaped support at the vertical bottom forms the effect of preventing pipeline displacement, but the mode cannot isolate corrosion of underground water, and the wrapped protection shell is easy to consume under the corrosion of the underground water.
In addition, because the steam pipeline generates high temperature in the steam conveying process, the soil nearby the pipeline forms a swelling phenomenon, soil nearby the pipeline loosens in a long-term state, the wrapping property is not strong, underground water is easy to accumulate, the soil loosens and deforms, and the sedimentation phenomenon is easy to generate.
Disclosure of Invention
The invention aims to provide a steam boiler pipeline installation construction method for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: a steam boiler pipeline installation construction method comprises the following steps:
step one: confirming construction sites, namely collecting site selection land topography information, soil condition information and groundwater level information, obtaining site selection land foundation information sets, and confirming the construction sites according to the site selection land foundation information sets, wherein the soil condition information comprises soil component parameters, soil mechanical parameters and soil corrosion parameters;
step two: designing pipeline wiring, and designing a pipeline wiring diagram according to a steam input position and a steam demand position, wherein the pipeline wiring diagram comprises the following steps: searching a first-stage pipeline design by taking a steam demand position closest to a steam input position as a first demand point, then searching a second-stage pipeline design by taking a steam demand position closest to the first demand point as a second demand point, and obtaining a subsequent demand point and pipeline design;
step three: preparing materials, namely preparing required construction materials according to a pipeline wiring drawing, wherein the construction materials comprise a boiler steam pipeline, a cement pipe bracket, reinforcing steel bars and a partition plate;
step four: preparing before construction and cleaning a construction area before starting installation, ensuring clean and tidy environment, and preparing required tools and equipment;
step five: pretreating an underground space, digging an underground pipe groove and a drainage pipe groove according to a pipeline wiring diagram, wherein the drainage pipe groove is provided with a plurality of drainage pipe grooves which are uniformly distributed at the bottom of the underground pipe groove;
step six: the installation of the suspension equipment is provided with a pipeline bracket and a suspension clamp, which are used for stably supporting the pipeline, and the installation positions and the number of the bracket and the suspension clamp are required to be determined according to the length and the required depth of the pipeline;
step seven: filling a drainage pipe groove, paving gravel with the diameter of 2 cm-5 cm in the drainage pipe groove, and reinforcing the drainage pipe groove when the gravel is used for normal circulation of underground water;
step eight: installing the pipeline, namely firstly assembling the pipeline and positioning the pipeline, and then installing the pipeline section by section to ensure the stability of the pipeline;
step nine: safety detection, namely performing leakage test, pressure test and functional test, wherein the pipeline section which does not pass through the safety detection needs to be reinstalled;
step ten: backfilling the paved pipe groove, and backfilling the paved pipe groove according to the design drawing.
In a further aspect, in the fifth step, the method for digging the underground pipe groove includes the following steps:
s1: digging a paving groove consistent with a preset pipeline route from the designed route of the steam conveying pipeline from the top, wherein the side surfaces of the paving groove are inclined planes, the cross section of the paving groove is trapezoid, and the paving groove is reserved with the width for installing a cement pipe;
s2: digging a water seepage tank from the middle of the paving groove for avoiding groundwater siltation in a channel of the steam pipeline, and digging a water storage tank after digging ten centimeters downwards from the paving groove.
With respect to this solution, the installing the pipe in the step eight includes the steps of:
n1: installing a cement pipe bracket for supporting a cement pipe, fixing the cement pipe bracket at the bottom of a paving groove, and fixing the cement pipe bracket through screws;
n2: and installing a cement pipe on the cement pipe support, and installing a boiler steam pipeline in the cement pipe to ensure the stability of the steam pipeline in the cement pipe.
With respect to the scheme, the cement pipe is a double-split cement pipe, the cement pipe is composed of two cement plates with semicircular cross sections, the thickness of the cement pipe is 3 cm-5 cm, ribs are arranged on the inner wall of the cement pipe, gaps are reserved between the steam pipeline of the boiler and the inner wall of the cement pipe, and ventilation of hot air is facilitated.
With respect to this solution, the positioning the pipeline in the eighth step includes the following steps:
step1: fixing plugboards on two sides of the installed cement pipe, horizontally arranging the plugboards on the ground, filling cement between the plugboards and the inner walls on two sides of the paving groove, and waiting for natural solidification of the cement;
step2: when the cement is in a soft plastic state, the steel bars are inserted into the plugboards at the two sides, so that the steel bars are inserted into the cement and fixed through cement solidification;
step3: gravel was packed between two insert plates, the gravel diameter being 3 cm-5 cm, and a fixed amount of cement was poured to increase the strength directly above the steam pipe.
With respect to this scheme still further, the picture peg is wooden plate body, and every meter interval is equipped with a jack that is used for inserting the reinforcing bar usefulness on the picture peg, and the reinforcing bar of both sides is the cross and locates cement pipe top, and the reinforcing bar surface pastes in cement pipe surface, carries out spacingly to the cement pipe.
With respect to this aspect, the backfilling of the laying groove in step ten includes the steps of:
v1: a layer of isolating film is paved above the gravel layer between the plugboards, so that ground water penetration is reduced;
v2: cement is poured over the spacer film, and the cement is tamped by a tamping machine to reduce gaps between the bottom gravels.
In the scheme, the ground elevation information acquisition takes the starting point and the end point of an underground steam boiler pipeline as acquisition areas, an acquisition point is set up every two hundred meters, the local average elevation is taken as a reference plane, the GPS positioning receiver is used for measuring the ground elevation and comparing the ground elevation with the elevation of a reference plane, so that elevation values are obtained, and the elevation values of all the acquisition points are limited to-1 m-5 m;
the groundwater level information requires a groundwater level distance from the surface of the earth greater than 5m.
Further to this scheme, the soil cost parameter of the soil condition information requires that the soil contain 3% -15% of sand and 10% -20% of water;
the soil mechanical parameter requires that the soil density is 1.2g/cm and 1.8g/cm, and the compressive strength of the soil is 100 kPa-300 kPa;
the soil corrosion parameters require that the pH of the soil be in the range of pH5.5 to pH9.
Compared with the prior art, the invention has the beneficial effects that:
according to the steam boiler pipeline installation construction method, the paving groove, the water seepage groove, the water storage groove and the like are dug, cement pouring is carried out on the paving groove to carry out sealing backfilling operation on the top of the paving groove, the integral tightness of the paving groove is guaranteed, the boiler steam pipeline dissipates heat, the pressure near the pipeline is improved, groundwater is restrained in the water storage groove under the pressure effect, and the phenomenon of pipe wall erosion caused by turbulent backflow of groundwater is avoided;
meanwhile, the cement pipe is a double-split cement pipe, the cement pipe is composed of two cement plates with semicircular cross sections, the double-split structure enables installation and disassembly to be more convenient and quicker, and when a pipeline is required to be maintained or replaced, only the covered cement plates are required to be disassembled;
the rib is arranged on the inner wall of the cement pipe, so that a gap is reserved between the steam pipeline of the boiler and the inner wall of the cement pipe, the gap is beneficial to circulation of hot air, the rib plays a role in guiding, so that the hot air can flow more smoothly, the resistance is reduced, in addition, the design of the rib is also beneficial to preventing the hot air from generating excessive pressure on the inner wall of the pipeline, thereby reducing the condition of soil bulge nearby the pipeline, avoiding direct dissipation of heat, and playing a good role in heat preservation for the steam pipe in the long-distance steam conveying process;
in addition, through both sides and the top of laying the groove all through cement watering, the fixed picture peg of both sides grafting provides the die cavity for cement pouring, makes cement watering simpler, can avoid the erosion of groundwater to a great extent and increase the intensity of laying the groove after the cement solidification, and support and reinforcing bar homoenergetic are spacing to the cement pipe that can be fine, but support and reinforcing bar avoid producing the rigidity to the cement pipe again and contradict, when taking place circumstances such as earthquake, underground boiler steam conduit has fine fault-tolerant space, reduces the damage condition.
Drawings
Fig. 1 is a schematic view of a steam boiler according to the present invention in a sectional view of a ground installation.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The installation of the underground steam pipeline is to bury the steam pipeline system underground and is used for connecting a transmission channel between the boiler and the steam utilization equipment, and the installation mode is common in the condition that the boiler and the steam utilization equipment are far away from an outdoor environment or occupied area is reduced, the installation of the underground steam pipeline has the advantages of reducing occupation of ground surface space, protecting the pipeline from being interfered and damaged by external environment, improving safety and reliability, and reducing heat loss in the steam transmission process and noise and visual pollution.
As shown in fig. 1, the present invention provides a technical solution: a steam boiler pipeline installation construction method comprises the following steps:
step one: before confirming construction sites, detailed investigation on aspects of topography, soil conditions, groundwater level and the like is needed, the topography information is a foundation for selecting the construction sites, factors such as height, gradient and the like of the topography directly influence drainage and construction difficulty of steam pipelines of an underground boiler, the property of the soil has important influence on the pre-buried depth of the steam pipelines of the boiler, support design of the pipelines, soil stability and the like, and the soil condition information mainly comprises parameters such as soil components, soil mechanical property, soil corrosion property and the like, and physical, chemical and mechanical properties of the soil are fully considered when the soil condition information is collected so as to ensure engineering safety and stability;
step two: designing pipeline wiring, and designing a pipeline wiring diagram according to a steam input position and a steam demand position, wherein the pipeline wiring diagram comprises the following steps: searching a first-stage pipeline design by taking a steam demand position closest to a steam input position as a first demand point, then searching a second-stage pipeline design by taking a steam demand position closest to the first demand point as a second demand point, and obtaining a subsequent demand point and pipeline design according to the second-stage pipeline design, wherein the method mainly aims at the installation of long-distance linear underground steam pipelines;
step three: preparing materials, namely preparing required construction materials according to a pipeline wiring drawing, wherein the construction materials comprise a boiler steam pipeline, a cement pipe bracket, reinforcing steel bars and a partition plate;
step four: preparing before construction and cleaning a construction area before starting installation, ensuring clean and tidy environment, and preparing required tools and equipment;
step five: pretreating an underground space, digging an underground pipe groove and a drainage pipe groove according to a pipeline wiring diagram, wherein the drainage pipe groove is provided with a plurality of uniform steps at the bottom of the underground pipe groove;
step six: the installation of the suspension equipment is provided with a pipeline bracket and a suspension clamp, which are used for stably supporting the pipeline, and the installation positions and the number of the bracket and the suspension clamp are required to be determined according to the length and the required depth of the pipeline;
step seven: filling a drainage pipe groove, paving gravel with the diameter of 2 cm-5 cm in the drainage pipe groove, and reinforcing the drainage pipe groove when the gravel is used for normal circulation of underground water;
step eight: installing the pipeline, namely firstly assembling the pipeline and positioning the pipeline, and then installing the pipeline section by section to ensure the stability of the pipeline;
step nine: safety detection, namely performing leakage test, pressure test and functional test, wherein the pipeline section which does not pass through the safety detection needs to be reinstalled;
step ten: backfilling the paved pipe groove, and backfilling the paved pipe groove according to the design drawing.
In order to ensure smooth implementation of this embodiment, it should be understood that, in the fifth step, the construction method for excavating the underground pipe trench is divided into the following stages:
tube slot design and planning
According to the planning route of steam delivery pipeline, excavate from the top to the pipeline route of predetermineeing is benchmark, and a groove of laying is excavated, and the side of laying the groove designs to the inclined plane, makes it have good drainage performance, under the both sides infiltration circumstances, groundwater moves infiltration downwards automatically, reduces groundwater and stops the condition, and the transversal trapezoidal form of personally submitting of groove of laying, and open-top is big, makes things convenient for the loop wheel machine to hoist and mount and manual operation to installation and maintenance, consequently reserve the width of installation cement pipe in the groove of laying after, be convenient for more satisfy the construction demand.
Additionally provided with a water seepage tank and a water storage tank
From the middle part of laying the groove beginning, dig and establish the infiltration tank, the design purpose of infiltration tank is to prevent groundwater siltation in the steam pipe passageway, because lay the slope of groove lateral wall, groundwater infiltration downwards, excavate ten centimetres back downwards at the infiltration tank, set up the catch basin, the effect of catch basin is collected and is discharged groundwater to guarantee steam pipe's normal operating, boiler steam pipe gives off heat, improves pipeline nearby pressure, will groundwater under the effect of pressure restrain in the catch basin, avoid groundwater to flow back in disorder, cause the pipe wall erosion phenomenon.
With respect to this solution, the installing the pipe in step eight comprises the steps of:
step one: installing a cement pipe bracket for supporting a cement pipe, fixing the cement pipe bracket at the bottom of a paving groove, and fixing the cement pipe bracket through screws;
step two: and installing a cement pipe on the cement pipe support, and installing a boiler steam pipeline in the cement pipe to ensure the stability of the steam pipeline in the cement pipe.
In order to ensure that the scheme is the optimal preferred scheme, it is to be understood that the cement pipe is a bipartite cement pipe, the cement pipe is formed by two cement plates with semicircular cross sections, the bipartite structure enables installation and disassembly to become more convenient and quick, when the pipeline needs to be maintained or replaced, only the covered cement plate needs to be disassembled, the thickness of the cement pipe is 3 cm-5 cm, the inner wall of the cement pipe is provided with ribs, a gap is reserved between the boiler steam pipeline and the inner wall of the cement pipe, the existence of the gap is beneficial to circulation of hot air, therefore, the thermal efficiency of the boiler steam pipeline is improved, when the hot air circulates in the cement pipe, the ribs play a guiding role, so that the hot air can flow more smoothly, the resistance is reduced, in addition, the design of the ribs also helps to prevent the hot air from generating excessive pressure on the inner wall of the pipeline, thereby reducing the risk of soil swelling nearby the pipeline, also avoiding direct loss of heat, in the long-distance steam conveying process, and meanwhile, the steam pipe can be well insulated.
Still further to the solution, positioning the pipeline in step eight includes the steps of:
step one: fixing plugboards on two sides of the installed cement pipe, horizontally arranging the plugboards on the ground, filling cement between the plugboards and the inner walls on two sides of the paving groove, waiting for natural solidification of the cement, trowelling the inclined plane of the paving groove when digging the cement poured on two sides, so that the paving groove forms a waterproof wall with certain strength, and isolating groundwater erosion to a great extent;
step two: when the cement is in a soft plastic state, the steel bars are inserted into the plugboards at the two sides, so that the steel bars are inserted into the cement and fixed through cement solidification;
step three: gravel was packed between two insert plates, the gravel diameter being 3 cm-5 cm, and a fixed amount of cement was poured to increase the strength directly above the steam pipe.
With respect to the scheme, the inserting plate is a wooden plate body, each meter of the inserting plate is provided with an inserting hole for inserting reinforcing steel bars at intervals, the reinforcing steel bars on two sides are arranged above the cement pipe in a cross mode, the surfaces of the reinforcing steel bars are attached to the surface of the cement pipe, and the cement pipe is limited.
Still further with respect to this aspect, backfilling the pavement groove in step ten includes the steps of:
step one: a layer of isolating film is paved above the gravel layer between the plugboards, so that ground water penetration is reduced;
step two: cement is poured over the spacer film, and the cement is tamped by a tamping machine to reduce gaps between the bottom gravels.
The isolating membrane and the poured cement can well isolate ground water, when the ground water is rich, the condition that the ground water permeates downwards from the top is reduced, and in this way, the strength of the backfilled paving groove can be increased, the soil layer collapse is avoided, the integral tightness of the paving groove is ensured, the pressure generated near the pipeline surrounds the pipeline, the pipeline is kept at a certain pressure, and the groundwater is restrained in the water storage groove under the pressure effect;
in the scheme, the ground height is measured by using a GPS positioning receiver by taking the starting point and the end point of an underground steam boiler pipeline as acquisition areas and setting an acquisition point every two hundred meters and taking the local average elevation as a reference plane, and the ground height is compared with the height of the reference plane, so that elevation values are obtained, the elevation values of all the acquisition points are limited to-1 m-5 m, and the construction requirements of the construction area are relatively gentle, so that the overall construction difficulty is ensured.
The groundwater level information requires a groundwater level distance from the surface of the earth greater than 5m.
With respect to the scheme, the soil cost parameter of the soil condition information requires that the soil contains 3% -15% of sand, a proper amount of sand can improve the drainage performance of the soil, reduce the compressibility of the soil, be beneficial to the stability and durability of the pipeline, and ensure that the water content of the soil is 10% -20%, and the proper water content can ensure the wrapping property of the soil on the cement pipe, so that the pipeline is better stabilized underground;
the density of the soil is required to be 1.2g/cm and 1.8g/cm, the bearing capacity of the soil can be ensured in a reasonable range of the density, the problem of pipeline installation caused by overlarge or undersize of the density of the soil is avoided, meanwhile, the compressive strength of the soil is required to be 100 kPa-300 kPa, and the soil can bear certain pressure in a reasonable compressive strength range, so that the stability and the safety of the pipeline are ensured;
the soil corrosion parameters require that the pH value of the soil is between pH5.5 and pH9, and the soil has low corrosiveness, so that the damage of the pipeline caused by corrosion can be effectively prevented.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended embodiments and equivalents thereof.
Claims (6)
1. The steam boiler pipeline installation construction method is characterized by comprising the following steps of:
step one: confirming construction sites, namely collecting site selection land topography information, soil condition information and groundwater level information, obtaining site selection land foundation information sets, and confirming the construction sites according to the site selection land foundation information sets, wherein the soil condition information comprises soil component parameters, soil mechanical parameters and soil corrosion parameters;
step two: designing pipeline wiring, and designing a pipeline wiring diagram according to a steam input position and a steam demand position, wherein the pipeline wiring diagram comprises the following steps: searching a first-stage pipeline design by taking a steam demand position closest to a steam input position as a first demand point, then searching a second-stage pipeline design by taking a steam demand position closest to the first demand point as a second demand point, and obtaining a subsequent demand point and pipeline design;
step three: preparing materials, namely preparing required construction materials according to a pipeline wiring drawing, wherein the construction materials comprise a boiler steam pipeline, a cement pipe bracket, reinforcing steel bars and a partition plate;
step four: preparing before construction and cleaning a construction area before starting installation, ensuring clean and tidy environment, and preparing required tools and equipment;
step five: pretreating an underground space, digging an underground pipe groove and a drainage pipe groove according to a pipeline wiring diagram, wherein the drainage pipe groove is provided with a plurality of drainage pipe grooves which are uniformly distributed at the bottom of the underground pipe groove;
step six: the installation of the suspension equipment is provided with a pipeline bracket and a suspension clamp, which are used for stably supporting the pipeline, and the installation positions and the number of the bracket and the suspension clamp are required to be determined according to the length and the required depth of the pipeline;
step seven: filling a drainage pipe groove, paving gravel with the diameter of 2 cm-5 cm in the drainage pipe groove, and reinforcing the drainage pipe groove when the gravel is used for normal circulation of underground water;
step eight: installing the pipeline, namely firstly assembling the pipeline and positioning the pipeline, and then installing the pipeline section by section to ensure the stability of the pipeline;
step nine: safety detection, namely performing leakage test, pressure test and functional test, wherein the pipeline section which does not pass through the safety detection needs to be reinstalled;
step ten: backfilling the paved pipe groove, and backfilling the paved pipe groove according to a design drawing;
in the fifth step, the method for digging the underground pipe groove comprises the following steps:
s1: digging a paving groove consistent with a preset pipeline route from the designed route of the steam conveying pipeline from the top, wherein the side surfaces of the paving groove are inclined planes, the cross section of the paving groove is trapezoid, and the paving groove is reserved with the width for installing a cement pipe;
s2: digging a water seepage tank from the middle of the paving tank to avoid groundwater siltation in a channel of the steam pipeline, and digging a water storage tank after digging ten centimeters downwards from the paving tank;
the installing the pipeline in the step eight comprises the following steps:
n1: installing a cement pipe bracket for supporting a cement pipe, fixing the cement pipe bracket at the bottom of a paving groove, and fixing the cement pipe bracket through screws;
n2: the cement pipe is arranged on the cement pipe support, and the boiler steam pipe is arranged in the cement pipe, so that the stability of the steam pipe in the cement pipe is ensured;
the cement pipe is a double-split cement pipe, the cement pipe is composed of two cement plates with semicircular cross sections, the thickness of the cement pipe is 3 cm-5 cm, ribs are arranged on the inner wall of the cement pipe, gaps are reserved between the steam pipeline of the boiler and the inner wall of the cement pipe, and circulation of hot air is facilitated.
2. The steam boiler pipe installation construction method according to claim 1, wherein: the positioning of the pipeline in the eighth step comprises the following steps:
step1: fixing plugboards on two sides of the installed cement pipe, horizontally arranging the plugboards on the ground, filling cement between the plugboards and the inner walls on two sides of the paving groove, and waiting for natural solidification of the cement;
step2: when the cement is in a soft plastic state, the steel bars are inserted into the plugboards at the two sides, so that the steel bars are inserted into the cement and fixed through cement solidification;
step3: gravel was packed between two insert plates, the gravel diameter being 3 cm-5 cm, and a fixed amount of cement was poured to increase the strength directly above the steam pipe.
3. The steam boiler pipe installation construction method according to claim 2, characterized in that: the picture peg is wood plate body, and every meter interval is equipped with a jack that is used for inserting the reinforcing bar usefulness on the picture peg, and the reinforcing bar of both sides is the cross and locates cement pipe top, and the reinforcing bar surface pastes in cement pipe surface, carries out spacingly to cement pipe.
4. The steam boiler pipe installation construction method according to claim 1, wherein: backfilling the paving groove in the step ten comprises the following steps:
v1: a layer of isolating film is paved above the gravel layer between the plugboards, so that ground water penetration is reduced;
v2: cement is poured over the spacer film, and the cement is tamped by a tamping machine to reduce gaps between the bottom gravels.
5. The steam boiler pipe installation construction method according to claim 1, wherein: the method comprises the steps of collecting the topography information, wherein a starting point and an end point of an underground steam boiler pipeline are used as collecting areas, a collecting point is set up every two hundred meters, a local average elevation is used as a datum plane, a GPS positioning receiver is used for measuring the height of the ground, and the height of the ground is compared with the height of a reference datum plane, so that elevation values are obtained, and the elevation values of all collecting points are limited to-1 m-5 m;
the groundwater level information requires a groundwater level distance from the surface of the earth greater than 5m.
6. The steam boiler pipe installation construction method according to claim 1, wherein: the soil cost parameter of the soil condition information requires that the sand content in the soil is 3% -15%, and the water content of the soil is 10% -20%;
the soil mechanical parameter requires that the soil density is 1.2g/cm and 1.8g/cm, and the compressive strength of the soil is 100 kPa-300 kPa;
the soil corrosion parameters require that the pH of the soil be in the range of pH5.5 to pH9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410252663.6A CN117823716B (en) | 2024-03-06 | Steam boiler pipeline installation construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410252663.6A CN117823716B (en) | 2024-03-06 | Steam boiler pipeline installation construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117823716A true CN117823716A (en) | 2024-04-05 |
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