CN103212179A - Construction method of pumping set type high-pressure water mist fire extinguishing system - Google Patents
Construction method of pumping set type high-pressure water mist fire extinguishing system Download PDFInfo
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- CN103212179A CN103212179A CN201310135783XA CN201310135783A CN103212179A CN 103212179 A CN103212179 A CN 103212179A CN 201310135783X A CN201310135783X A CN 201310135783XA CN 201310135783 A CN201310135783 A CN 201310135783A CN 103212179 A CN103212179 A CN 103212179A
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Abstract
The invention discloses a construction method of a pumping set type high-pressure water mist fire extinguishing system. The method comprises following steps of: installation of a high-pressure pumping set, installation of a high-pressure area valve set and a valve box, installation of a high-pressure water mist nozzle, installation of a pipeline and pipeline fittings, a water pressure intensity test for a pipeline system, an air tightness test, blowing of the pipeline system, washing of a water storage tank, installation of a filter, start and debugging of the system, and the like. The construction method disclosed by the invention is convenient, environment-friendly and good in effect.
Description
Technical field
The present invention relates to a kind of pump group formula high-pressure fine water mist fire-extinguishing system construction method.
Background technology
Existing fire extinguishing system construction, construction is complicated, has shortcoming at aspects such as safety, work effects, requires further improvement.
Summary of the invention
The object of the present invention is to provide a kind of convenience, environmental protection, effective pump group formula high-pressure fine water mist fire-extinguishing system construction method.
Technical solution of the present invention is:
A kind of pump group formula high-pressure fine water mist fire-extinguishing system construction method is characterized in that: comprise the following steps:
(1) installation of high-pressure pump group
At first carry out the examination of foundation for water pumps: foundation for water pumps has 3, and wherein, 2 is the small pump basis, and 1 is high-pressure pump group basis, its coordinate position permissible variation ± 20mm; Absolute altitude permissible variation+0 on variant plane; Planar profile permissible variation in dimension ± 20mm, planar profile permissible variation in dimension-20mm on the boss;
Next carries out the lifting transhipment of pump group equipment: adopt 25t truck crane lifting transhipment; After equipment is transported to doorway, equipment building, adopt 5t hydraulic pressure car to carry out the level transportation of equipment, be transported in the fire water pump house, other sundry miscellaneaus material adopts the transportation of handcart secondary;
Carry out the installation in place of pump group equipment once more: after equipment is transported to pump house, 4 groups of interim suspension centres are set below floor, adopt the 3t chain block that equipment is promoted, and utilize the interim ramp that is provided with, equipment is moved on the basis; Utilize chain block that equipment is carried out thick centering, utilize adjustment pump seat lower padding iron to carry out the adjustment of levelness again, every group of parallels is no more than three, and parallels exposes base, and electric welding together, in case play;
Carry out the fixing of pump group equipment at last: use setscrew or chemical bolt permanent plant, and build carrying out concrete in the support, floating;
(2) high-pressure area valve group and clack box are installed
High-pressure area valve block and clack box are arranged on the ruins main building first floor, directly enter main building warning valve chamber behind the thin water smoke pipeline of the integrated pipe canal inner high voltage poling ditch; Whole valve group chamber is provided with 6 groups of open type valve blocks altogether, 5 bivalve casees wherein, 1 single valve case, the pipeline in each district of valve component control;
Valve group and clack box are installed: be installed in operating surface one side, setting height(from bottom) is no more than 1.7m, is not less than 1.2m.The permanent marker board of indicating guard plot title and numbering is set on the Region control valve; Clack box is installed firm stable, and the perpendicularity permissible variation is controlled in 1/1000;
(3) the heavy pressure fine spray shower nozzle is installed
Check its model, specification and spray orifice direction one by one when shower nozzle is installed, and adhere to specification; Engineering adopts the deluge system of K=0.45, K=1.2, K=2.04;
The heavy pressure fine spray shower nozzle is installed: adopt elbow, threeway when shower nozzle is installed, the spray-head interface screw thread is M18*1.5, M12*1.0; Shower nozzle is installed and used spanner, when shower nozzle is installed, adheres to specification with the distance of furred ceiling, door and window, hole or metope; The shower nozzle outlet is provided with dust cover, and guarantees not overslaugh spraying; The pipeline of system advanced flushing and purging before shower nozzle was installed, and avoided line clogging;
(4) installation of pipeline and pipe fitting
The pressure piping material adopts 304L high-pressure seamless stainless steel tube, implements the welding of gas shield argon arc;
(1) preparation before the construction
For the zone of pipeline complexity, carry out the stack of each professional pipeline by the draftsman, draw out electromechanical pipeline in-depth figure, and in conjunction with on-the-spot trend and the absolute altitude of adjusting each professional pipeline, after design is confirmed in order to guiding construction;
Carry out the examination of materials by GB before the pipe prefabrication, and submit a report asking for to manage and check and accept, underproof material is then refused to use;
Pipeline and equipment are removed inner dirt and foreign material before installing, and the place of remaining silent of interrupting or finishing is installed, and interim sealing prevents that foreign material from entering in pipeline and the equipment, stop up the action of heavy pressure fine spray shower nozzle;
(2) Pipe Cutting
Use the cutting machine Pipe Cutting, the port foreign matter is taken out with the angle grinding machine polishing port that nylon wheel has been installed in the cutting back;
(3) deburring
With burr inside and outside the file removal pipe port;
(4) groove processing
Stainless steel pipes cutting and cut adopt machining, with plasma applications sanding machine cleaning machined surface;
(5) weld bond is arranged
The butt joint weld bond, its distance between center line tube bending point is not less than tube outer diameter and is not less than 100mm, is at least 50mm apart from the suspension and support edge.With two of pipeline butt joint weld bond spacings from being not less than 150mm;
(6) weld bond spot welding
Striking striking in groove during welding;
Do not injure mother metal when removing jig and its crator is polished flat, and do infiltration and detect;
After checking that the weldment counterpart is up-to-standard, carry out root layer tack welding; Long 10～the 15mm of some welding line, the weld bead height of tack welding is below 2/3 of weldment thickness, checks the quality of each solder joint behind the tack welding, in time removes as defectiveness, again spot welding; Spotweld is evenly distributed on the whole circumference;
Backing welding adopts argon tungsten-arc welding, and argon-filled protection is adopted at the back side;
Multi-pass welding, each layer road joint staggers mutually;
The welding finish after with slag, splash and clean out;
(7) welder's self check
Whether welder's self check work runs through whole welding process, and the scope of examination comprises: weldering meets the surface whether pore, slag inclusion, crackle, undercut, arc crater defective are arranged, and whether joint is good, fill metal and mother metal and merge good; If any problem, after the employing mechanical processing method removal of defects, carry out repair welding again; After welder, class monitor and group leader's self check are qualified, fill inspection record and give the Quality Inspector; The Quality Inspector carries out 100% outward appearance detection to weld bond according to the self-inspection record form; Detecting qualified back fills in the Non-Destructive Testing order ticket by the technician and meets at heat treatment and harmless personnel;
Face of weld is not less than pipe surface, and weld reinforcement Δ h≤1+0.2 * group and is not more than 3mm to the Breadth Maximum of back groove; The joint misalignment is not more than 10% of wall thickness, and is not more than 2mm;
(8) weld seam acid wash passivation
Weld seam and both sides welding slag thereof, splash are cleaned out, and oil stain is removed with gasoline or cleaning agent in the machined piece surface;
When removing weld seam both sides foreign matter, remove with stainless steel wire brush, stainless steel shovel or emery wheel, removing finishes washes away totally with water purification;
When greasy dirt is serious with 3～5% aqueous slkali with oil removal, and rinse well with water purification;
Formulate the safety measure of pickling, passivation, determine essential apparatus and labour protection articles for use;
It is thick at room temperature pickling paste to be evenly coated on the clean weld seam 2～3mm, stops after one hour with clean water or stainless steel wire brush brush gently, till the fineness that presents uniform white acid etching;
The face of weld that at room temperature passivation cream is evenly coated in pickling is checked after about 2～3mm) 1 hours, till the surface generates uniform passivating film;
Surface washing is clean behind the acid wash passivation with clean water, with any place of acid litmus paper test flushing surface, make pH value between 6.5～7.5 at last, dry then or dry up with compressed air;
(5) water pressure test for strength of pipe-line system, air-tight test
After pipeline installs, carry out water pressure test for strength and air-tight test, water pressure test for strength pressure is 1.5 times of system design temperature, and the dwell time is 10min;
The chloride ion content of pressure test water is no more than 25mg/L;
Water pours into from low spot on the pipeline, and the height point and the end of test section are established air bleeding valve, makes the interior gas discharging of pipe to the greatest extent;
During pressure test, the shower nozzle place that links to each other with pipeline is blocked with the stainless steel plug, with high-pressure pump group junction plug is set and isolates;
Pressure testing is no less than 2 with Pressure gauge, and the Pressure gauge accuracy class should be not less than 1.5 grades, and the dial plate diameter is not less than 150mm, and range is 1.3 times to 1.5 times of test pressure;
When pipeline carries out the intensity pressure test, classification is boosted: 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, each level is checked pipe end closure plate, back support, buttress, pipe shaft and interface, when no abnormal, continue again to boost, after hydraulic pressure rises to test pressure, pressurize 10min, check interface, pipe shaft do not have breakage, do not have leak into strength test qualified;
The qualified laggard capable air-tightness pressure test of pipeline strength pressure test; Pressurize 10min, no pressure drop is qualified;
(6) pipe-line system purges
After water pressure test for strength is finished, purge, purge pipeline and adopt compressed air;
After the pipeline pressure test is finished, pipe-line system is purged, remove welding slag, iron rust, oxide impurity in the pipe with compressed air;
The source of the gas that purges adopts air compressor, and installs three grades of oil strainers additional in the outlet of air compressor, guarantees not oil-containing of purge gas;
The pipeline of floss hole is installed interim the support fix, and temporary pipeline is installed the gas of discharging is guided to outdoor safety zone;
The order of air purge should be carried out successively by the person in charge, arm, but the foul that blows out must not enter the pipeline that has purged;
Before the air purge, ponding in the first discharge pipe, air velocity is not less than 30m/s, and sweep air pressure is 75% of a design pressure, and is not less than 25% of design pressure;
Each exhaust outlet purge time is not less than 15～20min, and purging number of times is 2 times;
(7) storage tank cleans and the filter installation
Before the debugging of pump group, storage tank is cleaned comprehensively, earlier external application pure water in the casing is cleaned, then casing is washed repeatedly, treat till the clean no any visible particle impurity of water quality; Then carry out the flushing of inlet pipeline, flushing is not when having obvious impurity, on the filter base, install filter, after checking that tight ness rating is qualified, carry out the stabilized pressure pump water filling, note water quality situation in the storage tank, if water quality reaches the requirement of high-pressure pump group, then cover the water tank top cover, carry out normal water filling, clean otherwise proceed pipeline;
(8) system opens and debugs
(1) system debug
A) pipe network debugging
When equipment and pipeline install, integrity check is qualified, carries out system's influent pressure pressure testing and air-tight test; After the acceptance(check), before coming into operation, also carry out the pipeline air purge and can come into operation after qualified;
Install in each system, after pressure testing cleaning and system open and deliver for a check, valve, annex, self controlled element, the pump apparatus of pipe-line system are checked, and cooperated the interlock debugging work of carrying out water system, make water system be in normal operation, meet design and load debugging acceptance requirement;
B) heavy pressure fine spray pump group stand-alone debugging
1. pump group debugging
Power cabinet, switch board, the circuit relevant with the pump group install, and quality inspection is qualified, and possess be subjected to electric condition after, each pump group motor should carry out megger test, and meet code requirement;
Must be full of liquid, emptying air before the starting mode of pump, not empty pump startup; Prestart answers jiggering flexible, and its valve is in following enable possition: inlet valve: standard-sized sheet; Outlet valve: centrifugal pump full cut-off; All the other pump standard-sized sheets; Pump operate at each independently the subsystem test running carry out after normal, pump under the design load continuously running be not less than 2 hours;
Test running is closed the gateway valve of pump and the valve of subsystem after finishing; Put the liquid that accumulates in the clean pump, prevent corrosion;
2. thin water smoke water pump debugging requirement
When starting heavy pressure fine spray pump group, the response time of heavy pressure fine spray system, promptly, be not more than 30s from receiving fire alarm to spraying water smoke in the automatic or manual mode;
3. stabilized pressure pump debugging requirement
The board design entry condition, stabilized pressure pump can start immediately; When system reached design pressure, stabilized pressure pump was out of service automatically;
4. drainage arrangement test requirements document
The begin to rehearse main draining valve of water device is made drainage test by system's design maximum injection flow rate, and is made pressure reach stable;
(3) interlock debugging
A) system debug principle
System is provided with automatically, manual and three kinds of control modes of mechanical emergency, and fire alarm control system has manual control translation function;
The detector alarm signal inserts FAS system fire alarm main frame by input module, sends the interlock control command by the fire alarm coordinated control system, reaches the purpose of monitoring high-pressure fine water mist fire-extinguishing system;
Wherein the fire alarm control unit of FAS system is realized the collection to on-the-spot fire signal; Realization is to the interlock control of equipment such as Region control valve, thin water smoke water pump, fire-fighting alarm bell, audible-visual annunciator, release indicator lamp;
B) debugging requirement
1. manually control debugging
A self check knob is arranged in the termination box of detector, be used to carry out the simulated fire test; Press the self check knob in the terminal box, after fire alarm control system is received the alarm signal of fire detector, start warning device; Operating personnel confirm fire, and the emergency start knob of opening in the on-the-spot Region control case comes start-up system; Start heavy pressure fine spray pump group, spray thin water smoke;
Utilize detector to carry out the simulated fire test equally; After fire alarm control system is received the alarm signal of fire detector, start warning device; Operating personnel confirm fire, directly open corresponding Region control valve in control centre and come start-up system; Start heavy pressure fine spray pump group; Spray thin water smoke;
2. control debugging automatically
Simulated fire after FAS system fire alarm control unit is accepted fire alarm, sends the fire-fighting alarm bell that the interlock control signal starts the corresponding region, and opened areas control valve group starts heavy pressure fine spray pump group automatically, sprays thin water smoke;
Simulated fire, the starting pressure switch, the pressure switch signal feedback is sent the release indicator lamp that the interlock control signal starts corresponding protection zone to FAS system fire alarm control unit, starts heavy pressure fine spray pump group, sprays thin water smoke.
High-pressure fine water mist fire-extinguishing system of the present invention is because the shower nozzle aperture is little, when pipeline, equipment, valve group etc. occur that foreign material are not rinsed well in the pipeline in corrosion or the installation process, be easy to cause shower nozzle to stop up, this worker method has been summed up in recent years on the basis of fire-fighting spraying fire extinguishing system installation experience, controls from pipeline and equipment, the selection of accessory, the inspection of quality of marching into the arena, mounting process, debugging and the maintaining many-side of system.Selection for pipeline satisfy operating pressure at sprinkler be not less than 10MPa and good corrosion resistance can 316 stainless-steel seamless pipes, valve and accessory are selected for use product corrosion-resistant, high pressure-bearing.
The present invention is to the welding of stainless steel seamless pipe and connect technology and carry out emphasis control, adopts inside and outside nitrogen filled protection welding, effectively avoided the corrosion of pipe joint position after, its corrosion drift stops up shower nozzle.
The present invention is directed to the heavy pressure fine spray shower nozzle characteristics higher to water quality requirement, before the stabilized pressure pump group, be provided with stainless steel storage tank, wound form fabric filter, the water in the storage tank was once made regular check on replacing in every month, had guaranteed pump group formula high-pressure fine water mist fire-extinguishing system water requirements in water quality.
Have pressure height, the ultra-fine characteristics of water smoke particulate in conjunction with high-pressure fine water mist fire-extinguishing system, the present invention guarantees the safe and stable operation of system from the monitoring of important several links intensifies process such as commissioning of the type selecting installation of equipment, shower nozzle, test, system.
The invention will be further described below in conjunction with embodiment.
The specific embodiment
A kind of pump group formula high-pressure fine water mist fire-extinguishing system construction method comprises the following steps:
(1) installation of high-pressure pump group
At first carry out the examination of foundation for water pumps: foundation for water pumps has 3, and wherein, 2 is the small pump basis, and 1 is high-pressure pump group basis, its coordinate position permissible variation ± 20mm; Absolute altitude permissible variation+0 on variant plane; Planar profile permissible variation in dimension ± 20mm, planar profile permissible variation in dimension-20mm on the boss;
Next carries out the lifting transhipment of pump group equipment: adopt 25t truck crane lifting transhipment; After equipment is transported to doorway, equipment building, adopt 5t hydraulic pressure car to carry out the level transportation of equipment, be transported in the fire water pump house, other sundry miscellaneaus material adopts the transportation of handcart secondary;
Carry out the installation in place of pump group equipment once more: after equipment is transported to pump house, 4 groups of interim suspension centres are set below floor, adopt the 3t chain block that equipment is promoted, and utilize the interim ramp that is provided with, equipment is moved on the basis; Utilize chain block that equipment is carried out thick centering, utilize adjustment pump seat lower padding iron to carry out the adjustment of levelness again, every group of parallels is no more than three, and parallels exposes base, and electric welding together, in case play;
Carry out the fixing of pump group equipment at last: use setscrew or chemical bolt permanent plant, and build carrying out concrete in the support, floating;
(2) high-pressure area valve group and clack box are installed
High-pressure area valve block and clack box are arranged on the ruins main building first floor, directly enter main building warning valve chamber behind the thin water smoke pipeline of the integrated pipe canal inner high voltage poling ditch; Whole valve group chamber is provided with 6 groups of open type valve blocks altogether, 5 bivalve casees wherein, 1 single valve case, the pipeline in each district of valve component control;
Valve group and clack box are installed: be installed in operating surface one side, setting height(from bottom) is no more than 1.7m, is not less than 1.2m.The permanent marker board of indicating guard plot title and numbering is set on the Region control valve; Clack box is installed firm stable, and the perpendicularity permissible variation is controlled in 1/1000;
(3) the heavy pressure fine spray shower nozzle is installed
Check its model, specification and spray orifice direction one by one when shower nozzle is installed, and adhere to specification; Engineering adopts the deluge system of K=0.45, K=1.2, K=2.04;
The heavy pressure fine spray shower nozzle is installed: adopt elbow, threeway when shower nozzle is installed, the spray-head interface screw thread is M18*1.5, M12*1.0; Shower nozzle is installed and used spanner, when shower nozzle is installed, adheres to specification with the distance of furred ceiling, door and window, hole or metope; The shower nozzle outlet is provided with dust cover, and guarantees not overslaugh spraying; The pipeline of system advanced flushing and purging before shower nozzle was installed, and avoided line clogging;
(4) installation of pipeline and pipe fitting
The pressure piping material adopts 304L high-pressure seamless stainless steel tube, implements the welding of gas shield argon arc;
(1) preparation before the construction
For the zone of pipeline complexity, carry out the stack of each professional pipeline by the draftsman, draw out electromechanical pipeline in-depth figure, and in conjunction with on-the-spot trend and the absolute altitude of adjusting each professional pipeline, after design is confirmed in order to guiding construction;
Carry out the examination of materials by GB before the pipe prefabrication, and submit a report asking for to manage and check and accept, underproof material is then refused to use;
Pipeline and equipment are removed inner dirt and foreign material before installing, and the place of remaining silent of interrupting or finishing is installed, and interim sealing prevents that foreign material from entering in pipeline and the equipment, stop up the action of heavy pressure fine spray shower nozzle;
(2) Pipe Cutting
Use the cutting machine Pipe Cutting, the port foreign matter is taken out with the angle grinding machine polishing port that nylon wheel has been installed in the cutting back;
(3) deburring
With burr inside and outside the file removal pipe port;
(4) groove processing
Stainless steel pipes cutting and cut adopt machining, with plasma applications sanding machine cleaning machined surface;
(5) weld bond is arranged
The butt joint weld bond, its distance between center line tube bending point is not less than tube outer diameter and is not less than 100mm, is at least 50mm apart from the suspension and support edge.With two of pipeline butt joint weld bond spacings from being not less than 150mm;
(6) weld bond spot welding
Striking striking in groove during welding;
Do not injure mother metal when removing jig and its crator is polished flat, and do infiltration and detect;
After checking that the weldment counterpart is up-to-standard, carry out root layer tack welding; Long 10～the 15mm of some welding line, the weld bead height of tack welding is below 2/3 of weldment thickness, checks the quality of each solder joint behind the tack welding, in time removes as defectiveness, again spot welding; Spotweld is evenly distributed on the whole circumference;
Backing welding adopts argon tungsten-arc welding, and argon-filled protection is adopted at the back side;
Multi-pass welding, each layer road joint staggers mutually;
The welding finish after with slag, splash and clean out;
(7) welder's self check
Whether welder's self check work runs through whole welding process, and the scope of examination comprises: weldering meets the surface whether pore, slag inclusion, crackle, undercut, arc crater defective are arranged, and whether joint is good, fill metal and mother metal and merge good; If any problem, after the employing mechanical processing method removal of defects, carry out repair welding again; After welder, class monitor and group leader's self check are qualified, fill inspection record and give the Quality Inspector; The Quality Inspector carries out 100% outward appearance detection to weld bond according to the self-inspection record form; Detecting qualified back fills in the Non-Destructive Testing order ticket by the technician and meets at heat treatment and harmless personnel;
Face of weld is not less than pipe surface, and weld reinforcement Δ h≤1+0.2 * group and is not more than 3mm to the Breadth Maximum of back groove; The joint misalignment is not more than 10% of wall thickness, and is not more than 2mm;
(8) weld seam acid wash passivation
Weld seam and both sides welding slag thereof, splash are cleaned out, and oil stain is removed with gasoline or cleaning agent in the machined piece surface;
When removing weld seam both sides foreign matter, remove with stainless steel wire brush, stainless steel shovel or emery wheel, removing finishes washes away totally with water purification;
When greasy dirt is serious with 3～5% aqueous slkali with oil removal, and rinse well with water purification;
Formulate the safety measure of pickling, passivation, determine essential apparatus and labour protection articles for use;
It is thick at room temperature pickling paste to be evenly coated on the clean weld seam 2～3mm, stops after one hour with clean water or stainless steel wire brush brush gently, till the fineness that presents uniform white acid etching;
The face of weld that at room temperature passivation cream is evenly coated in pickling is checked after about 2～3mm) 1 hours, till the surface generates uniform passivating film;
Surface washing is clean behind the acid wash passivation with clean water, with any place of acid litmus paper test flushing surface, make pH value between 6.5～7.5 at last, dry then or dry up with compressed air;
(5) water pressure test for strength of pipe-line system, air-tight test
After pipeline installs, carry out water pressure test for strength and air-tight test, water pressure test for strength pressure is 1.5 times of system design temperature, and the dwell time is 10min;
The chloride ion content of pressure test water is no more than 25mg/L;
Water pours into from low spot on the pipeline, and the height point and the end of test section are established air bleeding valve, makes the interior gas discharging of pipe to the greatest extent;
During pressure test, the shower nozzle place that links to each other with pipeline is blocked with the stainless steel plug, with high-pressure pump group junction plug is set and isolates;
Pressure testing is no less than 2 with Pressure gauge, and the Pressure gauge accuracy class should be not less than 1.5 grades, and the dial plate diameter is not less than 150mm, and range is 1.3 times to 1.5 times of test pressure;
When pipeline carries out the intensity pressure test, classification is boosted: 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, each level is checked pipe end closure plate, back support, buttress, pipe shaft and interface, when no abnormal, continue again to boost, after hydraulic pressure rises to test pressure, pressurize 10min, check interface, pipe shaft do not have breakage, do not have leak into strength test qualified;
The qualified laggard capable air-tightness pressure test of pipeline strength pressure test; Pressurize 10min, no pressure drop is qualified;
(6) pipe-line system purges
After water pressure test for strength is finished, purge, purge pipeline and adopt compressed air;
After the pipeline pressure test is finished, pipe-line system is purged, remove welding slag, iron rust, oxide impurity in the pipe with compressed air;
The source of the gas that purges adopts air compressor, and installs three grades of oil strainers additional in the outlet of air compressor, guarantees not oil-containing of purge gas;
The pipeline of floss hole is installed interim the support fix, and temporary pipeline is installed the gas of discharging is guided to outdoor safety zone;
The order of air purge should be carried out successively by the person in charge, arm, but the foul that blows out must not enter the pipeline that has purged;
Before the air purge, ponding in the first discharge pipe, air velocity is not less than 30m/s, and sweep air pressure is 75% of a design pressure, and is not less than 25% of design pressure;
Each exhaust outlet purge time is not less than 15～20min, and purging number of times is 2 times;
(7) storage tank cleans and the filter installation
Before the debugging of pump group, storage tank is cleaned comprehensively, earlier external application pure water in the casing is cleaned, then casing is washed repeatedly, treat till the clean no any visible particle impurity of water quality; Then carry out the flushing of inlet pipeline, flushing is not when having obvious impurity, on the filter base, install filter, after checking that tight ness rating is qualified, carry out the stabilized pressure pump water filling, note water quality situation in the storage tank, if water quality reaches the requirement of high-pressure pump group, then cover the water tank top cover, carry out normal water filling, clean otherwise proceed pipeline;
(8) system opens and debugs
(1) system debug
A) pipe network debugging
When equipment and pipeline install, integrity check is qualified, carries out system's influent pressure pressure testing and air-tight test; After the acceptance(check), before coming into operation, also carry out the pipeline air purge and can come into operation after qualified;
Install in each system, after pressure testing cleaning and system open and deliver for a check, valve, annex, self controlled element, the pump apparatus of pipe-line system are checked, and cooperated the interlock debugging work of carrying out water system, make water system be in normal operation, meet design and load debugging acceptance requirement;
B) heavy pressure fine spray pump group stand-alone debugging
1. pump group debugging
Power cabinet, switch board, the circuit relevant with the pump group install, and quality inspection is qualified, and possess be subjected to electric condition after, each pump group motor should carry out megger test, and meet code requirement;
Must be full of liquid, emptying air before the starting mode of pump, not empty pump startup; Prestart answers jiggering flexible, and its valve is in following enable possition: inlet valve: standard-sized sheet; Outlet valve: centrifugal pump full cut-off; All the other pump standard-sized sheets; Pump operate at each independently the subsystem test running carry out after normal, pump under the design load continuously running be not less than 2 hours;
Test running is closed the gateway valve of pump and the valve of subsystem after finishing; Put the liquid that accumulates in the clean pump, prevent corrosion;
2. thin water smoke water pump debugging requirement
When starting heavy pressure fine spray pump group, the response time of heavy pressure fine spray system, promptly, be not more than 30s from receiving fire alarm to spraying water smoke in the automatic or manual mode;
3. stabilized pressure pump debugging requirement
The board design entry condition, stabilized pressure pump can start immediately; When system reached design pressure, stabilized pressure pump was out of service automatically;
4. drainage arrangement test requirements document
The begin to rehearse main draining valve of water device is made drainage test by system's design maximum injection flow rate, and is made pressure reach stable;
(3) interlock debugging
A) system debug principle
System is provided with automatically, manual and three kinds of control modes of mechanical emergency, and fire alarm control system has manual control translation function;
The detector alarm signal inserts FAS system fire alarm main frame by input module, sends the interlock control command by the fire alarm coordinated control system, reaches the purpose of monitoring high-pressure fine water mist fire-extinguishing system;
Wherein the fire alarm control unit of FAS system is realized the collection to on-the-spot fire signal; Realization is to the interlock control of equipment such as Region control valve, thin water smoke water pump, fire-fighting alarm bell, audible-visual annunciator, release indicator lamp;
B) debugging requirement
1. manually control debugging
A self check knob is arranged in the termination box of detector, be used to carry out the simulated fire test; Press the self check knob in the terminal box, after fire alarm control system is received the alarm signal of fire detector, start warning device; Operating personnel confirm fire, and the emergency start knob of opening in the on-the-spot Region control case comes start-up system; Start heavy pressure fine spray pump group, spray thin water smoke;
Utilize detector to carry out the simulated fire test equally; After fire alarm control system is received the alarm signal of fire detector, start warning device; Operating personnel confirm fire, directly open corresponding Region control valve in control centre and come start-up system; Start heavy pressure fine spray pump group; Spray thin water smoke;
2. control debugging automatically
Simulated fire after FAS system fire alarm control unit is accepted fire alarm, sends the fire-fighting alarm bell that the interlock control signal starts the corresponding region, and opened areas control valve group starts heavy pressure fine spray pump group automatically, sprays thin water smoke;
Simulated fire, the starting pressure switch, the pressure switch signal feedback is sent the release indicator lamp that the interlock control signal starts corresponding protection zone to FAS system fire alarm control unit, starts heavy pressure fine spray pump group, sprays thin water smoke.
Claims (1)
1. a pump group formula high-pressure fine water mist fire-extinguishing system construction method is characterized in that: comprise the following steps:
(1) installation of high-pressure pump group
At first carry out the examination of foundation for water pumps: foundation for water pumps has 3, and wherein, 2 is the small pump basis, and 1 is high-pressure pump group basis, its coordinate position permissible variation ± 20mm; Absolute altitude permissible variation+0 on variant plane; Planar profile permissible variation in dimension ± 20mm, planar profile permissible variation in dimension-20mm on the boss;
Next carries out the lifting transhipment of pump group equipment: adopt 25t truck crane lifting transhipment; After equipment is transported to doorway, equipment building, adopt 5t hydraulic pressure car to carry out the level transportation of equipment, be transported in the fire water pump house, other sundry miscellaneaus material adopts the transportation of handcart secondary;
Carry out the installation in place of pump group equipment once more: after equipment is transported to pump house, 4 groups of interim suspension centres are set below floor, adopt the 3t chain block that equipment is promoted, and utilize the interim ramp that is provided with, equipment is moved on the basis; Utilize chain block that equipment is carried out thick centering, utilize adjustment pump seat lower padding iron to carry out the adjustment of levelness again, every group of parallels is no more than three, and parallels exposes base, and electric welding together, in case play;
Carry out the fixing of pump group equipment at last: use setscrew or chemical bolt permanent plant, and build carrying out concrete in the support, floating;
(2) high-pressure area valve group and clack box are installed
High-pressure area valve block and clack box are arranged on the ruins main building first floor, directly enter main building warning valve chamber behind the thin water smoke pipeline of the integrated pipe canal inner high voltage poling ditch; Whole valve group chamber is provided with 6 groups of open type valve blocks altogether, 5 bivalve casees wherein, 1 single valve case, the pipeline in each district of valve component control;
Valve group and clack box are installed: be installed in operating surface one side, setting height(from bottom) is no more than 1.7m, is not less than 1.2m.The permanent marker board of indicating guard plot title and numbering is set on the Region control valve; Clack box is installed firm stable, and the perpendicularity permissible variation is controlled in 1/1000;
(3) the heavy pressure fine spray shower nozzle is installed
Check its model, specification and spray orifice direction one by one when shower nozzle is installed, and adhere to specification; Engineering adopts the deluge system of K=0.45, K=1.2, K=2.04;
The heavy pressure fine spray shower nozzle is installed: adopt elbow, threeway when shower nozzle is installed, the spray-head interface screw thread is M18*1.5, M12*1.0; Shower nozzle is installed and used spanner, when shower nozzle is installed, adheres to specification with the distance of furred ceiling, door and window, hole or metope; The shower nozzle outlet is provided with dust cover, and guarantees not overslaugh spraying; The pipeline of system advanced flushing and purging before shower nozzle was installed, and avoided line clogging;
(4) installation of pipeline and pipe fitting
The pressure piping material adopts 304L high-pressure seamless stainless steel tube, implements the welding of gas shield argon arc;
(1) preparation before the construction
For the zone of pipeline complexity, carry out the stack of each professional pipeline by the draftsman, draw out electromechanical pipeline in-depth figure, and in conjunction with on-the-spot trend and the absolute altitude of adjusting each professional pipeline, after design is confirmed in order to guiding construction;
Carry out the examination of materials by GB before the pipe prefabrication, and submit a report asking for to manage and check and accept, underproof material is then refused to use;
Pipeline and equipment are removed inner dirt and foreign material before installing, and the place of remaining silent of interrupting or finishing is installed, and interim sealing prevents that foreign material from entering in pipeline and the equipment, stop up the action of heavy pressure fine spray shower nozzle;
(2) Pipe Cutting
Use the cutting machine Pipe Cutting, the port foreign matter is taken out with the angle grinding machine polishing port that nylon wheel has been installed in the cutting back;
(3) deburring
With burr inside and outside the file removal pipe port;
(4) groove processing
Stainless steel pipes cutting and cut adopt machining, with plasma applications sanding machine cleaning machined surface;
(5) weld bond is arranged
The butt joint weld bond, its distance between center line tube bending point is not less than tube outer diameter and is not less than 100mm, is at least 50mm apart from the suspension and support edge.With two of pipeline butt joint weld bond spacings from being not less than 150mm;
(6) weld bond spot welding
Striking striking in groove during welding;
Do not injure mother metal when removing jig and its crator is polished flat, and do infiltration and detect;
After checking that the weldment counterpart is up-to-standard, carry out root layer tack welding; Long 10～the 15mm of some welding line, the weld bead height of tack welding is below 2/3 of weldment thickness, checks the quality of each solder joint behind the tack welding, in time removes as defectiveness, again spot welding; Spotweld is evenly distributed on the whole circumference;
Backing welding adopts argon tungsten-arc welding, and argon-filled protection is adopted at the back side;
Multi-pass welding, each layer road joint staggers mutually;
The welding finish after with slag, splash and clean out;
(7) welder's self check
Whether welder's self check work runs through whole welding process, and the scope of examination comprises: weldering meets the surface whether pore, slag inclusion, crackle, undercut, arc crater defective are arranged, and whether joint is good, fill metal and mother metal and merge good; If any problem, after the employing mechanical processing method removal of defects, carry out repair welding again; After welder, class monitor and group leader's self check are qualified, fill inspection record and give the Quality Inspector; The Quality Inspector carries out 100% outward appearance detection to weld bond according to the self-inspection record form; Detecting qualified back fills in the Non-Destructive Testing order ticket by the technician and meets at heat treatment and harmless personnel;
Face of weld is not less than pipe surface, and weld reinforcement Δ h≤1+0.2 * group and is not more than 3mm to the Breadth Maximum of back groove; The joint misalignment is not more than 10% of wall thickness, and is not more than 2mm;
(8) weld seam acid wash passivation
Weld seam and both sides welding slag thereof, splash are cleaned out, and oil stain is removed with gasoline or cleaning agent in the machined piece surface;
When removing weld seam both sides foreign matter, remove with stainless steel wire brush, stainless steel shovel or emery wheel, removing finishes washes away totally with water purification;
When greasy dirt is serious with 3～5% aqueous slkali with oil removal, and rinse well with water purification;
Formulate the safety measure of pickling, passivation, determine essential apparatus and labour protection articles for use;
It is thick at room temperature pickling paste to be evenly coated on the clean weld seam 2～3mm, stops after one hour with clean water or stainless steel wire brush brush gently, till the fineness that presents uniform white acid etching;
The face of weld that at room temperature passivation cream is evenly coated in pickling is checked after about 2～3mm) 1 hours, till the surface generates uniform passivating film;
Surface washing is clean behind the acid wash passivation with clean water, with any place of acid litmus paper test flushing surface, make pH value between 6.5～7.5 at last, dry then or dry up with compressed air;
(5) water pressure test for strength of pipe-line system, air-tight test
After pipeline installs, carry out water pressure test for strength and air-tight test, water pressure test for strength pressure is 1.5 times of system design temperature, and the dwell time is 10min;
The chloride ion content of pressure test water is no more than 25mg/L;
Water pours into from low spot on the pipeline, and the height point and the end of test section are established air bleeding valve, makes the interior gas discharging of pipe to the greatest extent;
During pressure test, the shower nozzle place that links to each other with pipeline is blocked with the stainless steel plug, with high-pressure pump group junction plug is set and isolates;
Pressure testing is no less than 2 with Pressure gauge, and the Pressure gauge accuracy class should be not less than 1.5 grades, and the dial plate diameter is not less than 150mm, and range is 1.3 times to 1.5 times of test pressure;
When pipeline carries out the intensity pressure test, classification is boosted: 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, each level is checked pipe end closure plate, back support, buttress, pipe shaft and interface, when no abnormal, continue again to boost, after hydraulic pressure rises to test pressure, pressurize 10min, check interface, pipe shaft do not have breakage, do not have leak into strength test qualified;
The qualified laggard capable air-tightness pressure test of pipeline strength pressure test; Pressurize 10min, no pressure drop is qualified;
(6) pipe-line system purges
After water pressure test for strength is finished, purge, purge pipeline and adopt compressed air;
After the pipeline pressure test is finished, pipe-line system is purged, remove welding slag, iron rust, oxide impurity in the pipe with compressed air;
The source of the gas that purges adopts air compressor, and installs three grades of oil strainers additional in the outlet of air compressor, guarantees not oil-containing of purge gas;
The pipeline of floss hole is installed interim the support fix, and temporary pipeline is installed the gas of discharging is guided to outdoor safety zone;
The order of air purge should be carried out successively by the person in charge, arm, but the foul that blows out must not enter the pipeline that has purged;
Before the air purge, ponding in the first discharge pipe, air velocity is not less than 30m/s, and sweep air pressure is 75% of a design pressure, and is not less than 25% of design pressure;
Each exhaust outlet purge time is not less than 15～20min, and purging number of times is 2 times;
(7) storage tank cleans and the filter installation
Before the debugging of pump group, storage tank is cleaned comprehensively, earlier external application pure water in the casing is cleaned, then casing is washed repeatedly, treat till the clean no any visible particle impurity of water quality; Then carry out the flushing of inlet pipeline, flushing is not when having obvious impurity, on the filter base, install filter, after checking that tight ness rating is qualified, carry out the stabilized pressure pump water filling, note water quality situation in the storage tank, if water quality reaches the requirement of high-pressure pump group, then cover the water tank top cover, carry out normal water filling, clean otherwise proceed pipeline;
(8) system opens and debugs
(1) system debug
A) pipe network debugging
When equipment and pipeline install, integrity check is qualified, carries out system's influent pressure pressure testing and air-tight test; After the acceptance(check), before coming into operation, also carry out the pipeline air purge and can come into operation after qualified;
Install in each system, after pressure testing cleaning and system open and deliver for a check, valve, annex, self controlled element, the pump apparatus of pipe-line system are checked, and cooperated the interlock debugging work of carrying out water system, make water system be in normal operation, meet design and load debugging acceptance requirement;
B) heavy pressure fine spray pump group stand-alone debugging
1. pump group debugging
Power cabinet, switch board, the circuit relevant with the pump group install, and quality inspection is qualified, and possess be subjected to electric condition after, each pump group motor should carry out megger test, and meet code requirement;
Must be full of liquid, emptying air before the starting mode of pump, not empty pump startup; Prestart answers jiggering flexible, and its valve is in following enable possition: inlet valve: standard-sized sheet; Outlet valve: centrifugal pump full cut-off; All the other pump standard-sized sheets; Pump operate at each independently the subsystem test running carry out after normal, pump under the design load continuously running be not less than 2 hours;
Test running is closed the gateway valve of pump and the valve of subsystem after finishing; Put the liquid that accumulates in the clean pump, prevent corrosion;
2. thin water smoke water pump debugging requirement
When starting heavy pressure fine spray pump group, the response time of heavy pressure fine spray system, promptly, be not more than 30s from receiving fire alarm to spraying water smoke in the automatic or manual mode;
3. stabilized pressure pump debugging requirement
The board design entry condition, stabilized pressure pump can start immediately; When system reached design pressure, stabilized pressure pump was out of service automatically;
4. drainage arrangement test requirements document
The begin to rehearse main draining valve of water device is made drainage test by system's design maximum injection flow rate, and is made pressure reach stable;
(3) interlock debugging
A) system debug principle
System is provided with automatically, manual and three kinds of control modes of mechanical emergency, and fire alarm control system has manual control translation function;
The detector alarm signal inserts FAS system fire alarm main frame by input module, sends the interlock control command by the fire alarm coordinated control system, reaches the purpose of monitoring high-pressure fine water mist fire-extinguishing system;
Wherein the fire alarm control unit of FAS system is realized the collection to on-the-spot fire signal; Realization is to the interlock control of equipment such as Region control valve, thin water smoke water pump, fire-fighting alarm bell, audible-visual annunciator, release indicator lamp;
B) debugging requirement
1. manually control debugging
A self check knob is arranged in the termination box of detector, be used to carry out the simulated fire test; Press the self check knob in the terminal box, after fire alarm control system is received the alarm signal of fire detector, start warning device; Operating personnel confirm fire, and the emergency start knob of opening in the on-the-spot Region control case comes start-up system; Start heavy pressure fine spray pump group, spray thin water smoke;
Utilize detector to carry out the simulated fire test equally; After fire alarm control system is received the alarm signal of fire detector, start warning device; Operating personnel confirm fire, directly open corresponding Region control valve in control centre and come start-up system; Start heavy pressure fine spray pump group; Spray thin water smoke;
2. control debugging automatically
Simulated fire after FAS system fire alarm control unit is accepted fire alarm, sends the fire-fighting alarm bell that the interlock control signal starts the corresponding region, and opened areas control valve group starts heavy pressure fine spray pump group automatically, sprays thin water smoke;
Simulated fire, the starting pressure switch, the pressure switch signal feedback is sent the release indicator lamp that the interlock control signal starts corresponding protection zone to FAS system fire alarm control unit, starts heavy pressure fine spray pump group, sprays thin water smoke.
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Application publication date: 20130724 |