CN103791227B - Medical liquid-state oxygen central gas supply system construction - Google Patents
Medical liquid-state oxygen central gas supply system construction Download PDFInfo
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- CN103791227B CN103791227B CN201410049418.1A CN201410049418A CN103791227B CN 103791227 B CN103791227 B CN 103791227B CN 201410049418 A CN201410049418 A CN 201410049418A CN 103791227 B CN103791227 B CN 103791227B
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Abstract
The invention discloses Medical liquid-state oxygen central gas supply system construction, comprise the steps: (1) preparation of construction, (2) storage tank lifts, (3) convey, (4) storage tank is installed, (5) pipeline degreasing, (6) Pipe installing, (7) pipeline strength is tested, (8) blowing pipeline, (9) equipment belt is installed, (10) valve installation, (11) air tightness test, (12) pipeline ground connection, (13) stand in debugging, (14) completion check.The techniques and methods that the present invention implements according to the construction of oxygen supply core in the newly-built, renovating and enlarging engineering of medical institutions, makes it store large-minded, safe and reliable, easy to operate, can reduce costs, gas quality is high, remarkable in economical benefits, and daily maintenance work amount is little; Ensure the safety oxygen of hospital on the one hand, on the other hand for hospital saves cost payout, improve effects, compared with traditional method of construction, has advantage significantly in duration, quality, safety etc.
Description
Technical field
The present invention relates to medical institutions' field air feed construction, especially relate to Medical liquid-state oxygen central gas supply system construction.
Background technique
Oxygen has purposes widely, mainly comprises supply of breathing, supports burning and exothermic heat of reaction three aspects.Reasonable oxygen uptake can improve and regulate patient, pregnant woman, the cardiovascular and cerebrovascular of the elderly, Respiratory ft tive resistance, alleviate hypertension, heart disease, the generation of the diseases such as chronic lung disease and development, be conducive to dispelling fatigue and get well, along with the development of China's medical and health care system and the raising of health of people level, the building hygiene equipment level of hospital have also been obtained and effectively improves, medical concentrated oxygen supply system obtains promotion and application in newly-built, the enlarging of medical institutions, and becomes one of the important measures that medical institutions carry out diagnose and treat diseases, health care work.
Medical concentrated oxygen supply refer to utilize concentrated oxygen supply system by the high pressure of oxygen source through decompression after, by Cemented filling to each gas consuming device, and utilize the equipment such as respiratory machine, oxygen output pipe air feed at each gas consuming device, to meet the oxygen supply demand of patient.At present, hospital's concentrated oxygen supply system has three kinds of forms substantially: (1) gas cylinder combines, primarily of gas cylinder, cylinder manifold, auto-changeover control platform, audible-visual annunciator and pipeline and annex composition; (2) PSA oxygen generation system, primarily of oxygen main frame, oil-free air compressor, knock out drum, dryer and oxygen holder and pipe-line system composition; (3) liquid oxygen air supply system, primarily of compositions such as cryogenic liquid tank, vaporizer, safety check, safety valve, pressure gauge, decompressor and pipelines.
At present mostly medical institutions adopt the supply of steel cylinder gaseous oxygen, and with the hospital of liquid oxygen, proportion is not high at home, there is management inconvenience, the shortcomings such as potential safety hazard is comparatively large, and financial cost is high.
Summary of the invention
The object of the invention is to the defect for prior art, Medical liquid-state oxygen central gas supply system construction is provided, efficient and convenient to reach use, supply gas safe and reliable, oxygen supply is continual and steady, the effect that Utilization ratio is high, not only drastically increases the Social benefit and economic benefit of medical institutions, more improves the life safety assurance coefficient of patient.
In order to solve the problems of the technologies described above, the present invention adopts following technological scheme:
Medical liquid-state oxygen central gas supply system construction, is characterized in that comprising the steps:
(1) preparation of construction
Be familiar with and examination construction drawing, understand that the medical gas project is reserved on drawing, pre-buried hole and pipeline position, in conjunction with civil engineering structure construction drawing, check civil engineering unit to have boxed out absolute altitude, the coordinate in hole, then working drawing budget is worked out, list the workload of each subdivisional work, determine each subdivisional work materials, recruitment and facility service condition in installing engineering, and be aggregated into table, then installing engineering construction technical schemes is worked out, determine the technical measures taked, write the record of telling somebody what one's real intentions are of safety and technical elements, last organizing construction personnel carry out technical training; Choice and design storage tank fabricating yard, designs ground bearing capacity, the walkway charging tank car, ventilation condition, gutter and Environmental security, and tank car transfusion metallic hose length is less than 4 meters, and storage tank is less than 3 meters to the position of automobile; Weight after charging according to storage tank and local geology state, undertaken constructing and maintenance by buider's work drawing requirement;
(2) storage tank lifting
Storage tank housing end socket is provided with two hangers, the left and right leg in storage tank housing front respectively has a hanger, there is the loop wheel machine of two winchs that storage tank is upright or set level by erectility by level with one, before lifting, first carry out examination hang, check the stationarity and reliability of slinging, then start to raise and hang to move;
(3) convey
Convey adopts non-packed, first storage tank is placed on transport vehicle bracket, and with steel band, storage tank and two pallet for transporting are bundled, when storage tank level is placed on two pallet for transporting, upward, stainless steel end socket drawn by pipeline bottom storage tank housing to the front vertical of storage tank, and storage tank and pallet for transporting and means of transportation are connected firmly, when changing means of transportation in transportation process, carry out lifting operation by the requirement of lifting;
(4) storage tank is installed
When storage tank transports to scene, Infrastructure does not complete, and presses the method for lifting by same for storage tank pallet for transporting, hang oneself, be placed on the place of protective measure from car with loop wheel machine; When storage tank transports to scene, during installation in position conditions being possessed, first storage tank is hung oneself from car and transfers to ground, then take the steel band that two pallet for transporting and storage tank bundle apart, then by the requirement of lifting carry out storage tank rising, upright, hang the operation in place moved; After storage tank installation in position, check valve pipe-line system, carries out air tightness test with pressure to valve, is connected by the use interface of storage tank with corollary system pipeline;
(5) pipeline degreasing
Carry out degreasing by designing requirement, formulate the degreasing measure of pipeline according to the soiled condition of pipeline working medium, pipe material, caliber, pipe; Be placed on there being the pipe of oil stain and corrosion in slot type receptacles and clean with aqueous slkali, buck is cleaned again with clear water, finally use organic solvent degreasing, soak 2 hours in degreaser, pipeline after degreasing and clean dry its inwall of filter paper wiping of workpiece, until grease vestige disappears on paper, or use ultraviolet lamps irradiates degreased surface, until purple fluorescence disappears; Rinse internal surface with clear water, after rinsing well, ventilation is dried again, then closes the mouth of pipe to the qualified pipeline of degreasing and workpiece; (6) Pipe installing
A, elder generation measure size according to drawing requirement, and the transplanting made marks, then with hacksaw or abrasive wheel cutting machine cutting, file deburring with file after cutting, cut ends face tilt deviation is less than 1% of tube outer diameter, and length is less than 3mm;
B, employing clod wash method bend oxygen channel, and be used in the pipeline that pressure is greater than 3MPa, bending radius is greater than 5 times of tube outer diameter, and other pipelines are greater than 3.5 times of tube outer diameter, and the angle of tube bending is greater than 90 ゜, and curved flat degree is less than 8%;
C, employing money base Welding connect, distance on straight tube between two butt weld centers is greater than the external diameter of pipe, length is greater than 200mm, seal in pipe welding seam and edge 200mm thereof, the size of welding seam distance pipeline starting point is greater than 100mm, the ring-like weld pitch support of pipelines of pipeline, suspension bracket clearance distance are greater than 50mm, carry out appearance quality inspection, and carry out preservative treatment on surface after having welded;
D, be familiar with drawing, understand the trend of pipeline, the specification material of branch and pipeline, mounting point, carry out procedure qualification and work out job instruction, construction in line with the drawings, with connecting between argon arc welding welding system pipeline, when system pipeline is through wall or base plate, add PVC casing protection, support of pipelines is evenly arranged, main line is arranged in pipe well, in furred ceiling, secondary duct is installed, setting height(from bottom) adjusts according to erecting bed, support of pipelines lays along wall or pillar, the suspension bracket of station intermediate conduit is arranged on the below of beam, gas pipeline adopts independently suspension and support, insulating material is established in steel pipe and suspension and support contacting point, Pipeline Crossing Program construction wall arranges sleeve pipe, between pipeline and pipeline, adopts sealing material to seal, and in care station setting pressure table case, the ventilation channel of each berth all passes from the corner in each ward, covers with aluminium alloy decorative cover, construct by process flow diagram order, when field condition is restricted, project quality person liable adjust according to actual conditions, and report technique responsible engineer to confirm,
(7) pipeline strength test
After Pipe installing, the each pipe joint of first check system, node and support of pipelines, then inflate in pipeline, preliminary experiment is carried out with air, when pressure rises to 50% of test pressure, observe the situation of pipeline, then boost step by step by 10% of test pressure, every grade of voltage stabilizing 5 minutes, until test pressure; Voltage stabilizing is after 10 minutes, then by Pressure Drop to design pressure, the dwell determines according to leakage detection work;
(8) blowing pipeline
After pipeline strength pass the test, establishment purge scheme, nitrogen or pressurized air is adopted to carry out blowing pipeline as medium, first support is checked before purging, and reinforce, the modulating valve of orifice plate, Flange joint, throttle valve, safety valve and instrument are dismantled, the valve of welding and instrument is taked flow through bypass or lay down valve head and valve seat adds protecting jacket, arrange simultaneously and purge forbidden zone, open the room door and window of each purging sewage draining exit; The weld seam of pipeline, turning, branch and dead angle place is knocked with wooden mallet, until iron rust, dust moisture and other foreign material disappear in blowing pipeline process; After purging end-of-job, the valve device pulled down is recovered, and seals each blow-off outlet, carry out purging record;
(9) equipment belt is installed
After blowing pipeline, according to design drawing requirement, on centerline stop valve and oxygen quick socket are installed, the setting height(from bottom) of quick socket makes to cover greatly rear quick socket top and exceeds panel, equipment belt interior conduit bulb is aimed at oxygen quick socket center, then screw in nut, screw up with a wrench, after equipment belt assembling, carry out pressure test and air tightness test; Equipment belt EXPANSION ANCHOR BOLTS is fastened on the wall of ward, and setting height(from bottom) meets design drawing requirement;
(10) valve installation
After equipment belt installs, first check the quality certification of valve and check inspection, installing by the specification that design drawing is indicated, model and position, when drawing not being indicated position and height, according to execute-in-place, angle design easy to maintenance and attractive in appearance; During installation the direction of arrow of valve and the direction of media flow consistent, valve rod upwards or substantially horizontal install;
(11) air tightness test
After valve installation, pass into gas to the pipeline tested, container, pressurize 24 hours, observed manometric change every 2 hours, then calculates leak-down rate;
(12) pipeline ground connection
There is the pipeline of electrostatic grounding requirement, each section of pipe way conduction, the titanium pipeline connected with electrostatic grounding and stainless steel pipeline, wire cross-over connection or grounding conductor adopt titanium plate or corrosion resistant plate transition, conductive contact surfaces eliminates rust and connects, and tests after electrostatic grounding installs;
(13) stand in debugging
After pipeline ground connection, first instrument plug and oxygen humidifier plug are inserted each use terminal, check insert unload flexibility, interchangeability and tightness, at operating room and rescue room, two or more oxygen terminal is set respectively, check terminal flow with the flowmeter on oxygen humidifier again, each terminal flow is greater than 10L/min; Then carry out warning device test, close source of the gas, release gas in oxygen supply pipeline, when undervoltage alarming device sends sound and optic signal, write down pipeline pressure value, repeat 3 times;
(14) completion check
Storage tank checks the air supply system of having constructed, and registers engineering previous work, performance, initial test and trial run situation, economic technique analysis, start to come into operation after qualified after installing and terminating and debug in station.
Further, storage tank in step (2) comprises inner core, urceolus, top cover and bottom, the end face of top cover is provided with at least two hangers, the inside of top cover is provided with boosting coil pipe, boosting coil pipe is provided with pressure valve, inner core is positioned at the inside of urceolus, oxygen distributor and air temperature type vaporizer is provided with between inner core and urceolus, the end face of air temperature type vaporizer is provided with fluid inlet, fluid inlet connects boosting coil pipe, the bottom surface of air temperature type vaporizer is provided with gaseous phase outlet, gaseous phase outlet connects oxygen distributor, the bottom surface of bottom is provided with leg, leg is provided with hanger, the side of urceolus is provided with liquid level visualization mouth, pressure gauge and steam outlet pipe, realize liquid oxygen being changed into gaseous oxygen to export.
Further, the bottom of inner core is provided with adsorption layer, can, effectively by the impurity absorption in liquid gas, prevent impurity from entering operating room, emergency ward etc. by delivery pipe.
Further, the inside of bottom is provided with isolation layer, prevents charge species from entering inner core and affecting the Security of storage tank.
The present invention, owing to have employed technique scheme, has following beneficial effect:
Use efficient and convenient, supply gas safe and reliable, oxygen supply is continual and steady, Utilization ratio is high, improve the Social benefit and economic benefit of medical institutions, improve the life safety assurance coefficient of patient: the techniques and methods that the present invention implements according to the construction of oxygen supply core in the newly-built, renovating and enlarging engineering of medical institutions, make it store large-minded, storage pressure is low, safe and reliable, easy to operate, can reduce cost of production, gas quality is high, saves about 2/3 than bottle oxygen oxygen system, remarkable in economical benefits, and daily maintenance work amount is little; Ensure that the safety oxygen of hospital on the one hand, on the other hand again for hospital saves cost payout, improve effects; Be applicable to the All aspects of such as planning, design, construction, use, maintenance, maintenance of medical institutions' liquid oxygen concentrated oxygen supply engineering, compared with traditional method of construction, in the technical-economic indexes such as duration, quality, safety, cost, there is advantage significantly; Utilize fluid mechanics and thermodynamic principle, unpowered, differential oxygen supply is realized by cryogenic liquid tank, vaporizer, reduction valve, voltage stabilizer etc., oxygen incoming terminal place is all equipped with stop valve, as long as stop valve is opened during use, can uninterruptedly oxygen supply, pressure, stability of flow, quick and easy to use; Oxygen supply pressure is only 1/16 of steel cylinder oxygen pressure, can avoid leaking with steel cylinder outlet and causing regional area or oxygen concentration to increase the security threat produced with the factor such as its high pressure, by arranging oxygen under-voltage acousto-optic warning device, the automatic or manual realizing oxygen supply switches, adopt oxygen pressure stabilizer two-pass design, ensure that the continuity of oxygen supply, improve the Security of equipment operation; Liquid oxygen produces gaseous oxygen by vaporization, and decrease inflation link, improve oxygen purity, freight is low, takes up room little, without the source of the gas of waste.
Accompanying drawing explanation
Fig. 1 is the structural representation of storage tank in Medical liquid-state oxygen central gas supply system construction of the present invention;
Fig. 2 is construction flow chart of the present invention;
Fig. 3 is the fundamental diagram of air temperature type vaporizer in the present invention.
Embodiment
Medical liquid-state oxygen central gas supply system construction of the present invention, its principle is that the liquid oxygen in liquid oxygen tank is input to oxygen distributor after air temperature type vaporizer vaporization, enter on the oxygen main line of each applying unit respectively by each valve on distributor, the oxygen main line in constituent parts or each building is led to the oxygen second level voltage stabilization and current stabilization case of each floor by conduit shaft, be adjusted to the oxygen pressure needed for each layer terminal respectively at this and led to the terminal of each medical area by the transverse tube in each layer corridor, when curative activity needs, medical apparatus is inserted in the oxygen rapid pipe joint on wall and can sucks required pure oxygen.
The present invention needs to prepare following material:
1, main material is as shown in table 1
Table 1 main material table
2, plant is as shown in table 2:
Table 2 main production equipments
3, related data of the present invention is as shown in table 3:
| Building, structure | Fire separation (m) |
| Road in hospital | 3.0 |
| I and II building walls or projection | 10.0 |
| Three, level Four building walls or projection | 15.0 |
| Electric substation of hospital | 12.0 |
| Detached garage, underground parking garage gateway, gutter | 15.0 |
| Public gathering place, life support area | 15.0 |
| Burning coal boiler room | 30.0 |
| General overhead power transmission line | >=1.5 times of pole heights |
Fire separation between table 3 building, structure
Implementation step of the present invention as shown in Figure 2, comprises the steps:
(1) preparation of construction
Be familiar with and examination construction drawing, understand that the medical gas project is reserved on drawing, pre-buried hole and pipeline position, in conjunction with civil engineering structure construction drawing, check civil engineering unit to have boxed out absolute altitude, the coordinate in hole, then working drawing budget is worked out, list the workload of each subdivisional work, determine each subdivisional work materials, recruitment and facility service condition in installing engineering, and be aggregated into table, then installing engineering construction technical schemes is worked out, determine the technical measures taked, write the record of telling somebody what one's real intentions are of safety and technical elements, last organizing construction personnel carry out technical training; Choice and design storage tank fabricating yard, designs ground bearing capacity, the walkway charging tank car, ventilation condition, gutter and Environmental security, and tank car transfusion metallic hose length is less than 4 meters, and storage tank is less than 3 meters to the position of automobile; Weight after charging according to storage tank and local geology state, undertaken constructing and maintenance by buider's work drawing requirement;
(2) storage tank lifting
As shown in Figure 1, storage tank comprises inner core 2, urceolus 1, top cover 4 and bottom 6, the end face of top cover 4 is provided with at least two hangers 5, the inside of top cover 4 is provided with boosting coil pipe 12, boosting coil pipe 12 is provided with pressure valve 13, and inner core 2 is positioned at the inside of urceolus 1, and the bottom of inner core 2 is provided with adsorption layer 7, can, effectively by the impurity absorption in liquid gas, prevent impurity from entering operating room, emergency ward etc. by delivery pipe, oxygen distributor 3 and air temperature type vaporizer 14 is provided with between inner core 2 and urceolus 1, the end face of air temperature type vaporizer 14 is provided with fluid inlet 16, fluid inlet 16 connects boosting coil pipe 12, the bottom surface of air temperature type vaporizer 14 is provided with gaseous phase outlet 17, gaseous phase outlet 17 connects oxygen distributor 3, the working principle of air temperature type vaporizer 14 as shown in Figure 3, the inside of bottom 6 is provided with isolation layer 8, prevent charge species from entering inner core 2 and affect the Security of storage tank, the bottom surface of bottom 6 is provided with leg 9, leg 9 is provided with hanger 5, the side of urceolus 1 is provided with liquid level visualization mouth 10, pressure gauge 11 and steam outlet pipe 15, realize liquid oxygen being changed into gaseous oxygen to export.
Storage tank housing end socket is provided with two hangers, the left and right leg in storage tank housing front respectively has a hanger, there is the loop wheel machine of two winchs that storage tank is upright or set level by erectility by level with one, before lifting, first carry out examination hang, check the stationarity and reliability of slinging, then start to raise and hang to move.
Air temperature type vaporizer is heat by absorbing in external environment and passes to the equipment that cryogenic media makes it vaporize.Cryogenic liquid vaporizer is widely used in because it possesses the advantages such as structure is simple, operating cost is cheap.From thermomechanics relevant knowledge, in vaporizer tube, the pressure of working medium is more than critical pressure, temperature lower than being liquid during critical temperature, higher than being gas during critical temperature; Time below critical pressure and critical temperature, have the gas-liquid two-phase section of a phase transformation, temperature higher than during the saturation temperature that pressure is corresponding being gas, lower than being overcooled liquid during saturation temperature.If pressure is higher than critical pressure, its heat exchange characteristic is divided into preheating section (below critical temperature) and evaporator section (more than critical temperature) two sections, do not have the evaporation stage of two-phase coexistent.Therefore, the pressure and temperature of medium determines the design proposal of vaporizer, and different fluidised form heat-transfer characters has very big difference, need consider respectively, calculate.
According to the first law of thermodynamics, the total amount of heat absorbed in the vaporescence of vaporizer, has following relation:
Q＝m(h
out-h
in)＝(Q
i+Q
g)n
In formula: Q is the heat output of star-like fin heat conductive tube within the unit time---KJ/s;
M is gasifying liquid quality---Kg in the unit time;
H
outfor vaporizer outlets gas enthalpy---KJ/Kg;
H
infor carburetor inlet liquid enthalpy---KJ/Kg;
Q
ifor heat output---the KJ/s in the single star-like fin heat conductive tube liquid phase region unit time;
Q
gfor heat output---the KJ/s in the single star-like fin heat conductive tube gas phase zone unit time;
N is the row of star-like fin heat conductive tube.
(3) convey
Convey adopts non-packed, first storage tank is placed on transport vehicle bracket, and with steel band, storage tank and two pallet for transporting are bundled, when storage tank level is placed on two pallet for transporting, the front vertical of storage tank upward, stainless steel end socket drawn by pipeline bottom storage tank housing, storage tank and pallet for transporting and means of transportation are connected firmly, medium speed travels, must not intense vibration, forbid storage tank and other any object collisions, forbid at any time moving carrying to storage tank do rolling, only have when two pallet for transporting could be removed before the lifting of grass planting installation in position; When changing means of transportation in transportation process, carry out lifting operation by the requirement of lifting;
(4) storage tank is installed
When storage tank transports to scene, Infrastructure does not complete, and presses the method for lifting by same for storage tank pallet for transporting, hang oneself, be placed on the place of protective measure from car with loop wheel machine; When storage tank transports to scene, during installation in position conditions being possessed, first storage tank is hung oneself from car and transfers to ground, then take the steel band that two pallet for transporting and storage tank bundle apart, then by the requirement of lifting carry out storage tank rising, upright, hang the operation in place moved; In hoisting process, forbid collision to be beaten, and pay special attention to the safety installations of cover top portion, the vacuum gauge of bottom and vacuum pumping valve and must not collide, should hang vertical line time in place, perpendicularity is not more than 2/1000; After storage tank installation in position, check valve pipe-line system, carries out air tightness test with pressure to valve, is connected by the use interface of storage tank with corollary system pipeline;
(5) pipeline degreasing
Carry out degreasing by designing requirement, formulate the degreasing measure of pipeline according to the soiled condition of pipeline working medium, pipe material, caliber, pipe; Be placed on there being the pipe of oil stain and corrosion in slot type receptacles and clean with aqueous slkali, buck is cleaned again with clear water, finally use organic solvent degreasing, soak 2 hours in degreaser, pipeline after degreasing and clean dry its inwall of filter paper wiping of workpiece, until grease vestige disappears on paper, or use ultraviolet lamps irradiates degreased surface, until purple fluorescence disappears; Rinse internal surface with clear water, after rinsing well, ventilation is dried again, then closes the mouth of pipe to the qualified pipeline of degreasing and workpiece; The organic solvent of degreasing repeatedly uses rear oil content to improve to be needed to change in time, specifies as shown in table 4:
| Oil content mg/L | Use regulation |
| ＞500 | Must not use |
| 100～500 | Thick degreasing |
| ＜100 | Clean degreasing |
Table 4 degreasing agent oil content parameter
(6) Pipe installing
A, elder generation measure size according to drawing requirement, and the transplanting made marks, then with hacksaw or abrasive wheel cutting machine cutting, file deburring with file after cutting, cut ends face tilt deviation is less than 1% of tube outer diameter, and length is less than 3mm;
B, employing clod wash method bend oxygen channel, and be used in the pipeline that pressure is greater than 3MPa, bending radius is greater than 5 times of tube outer diameter, and other pipelines are greater than 3.5 times of tube outer diameter, and the angle of tube bending is greater than 90 ゜, and curved flat degree is less than 8%;
C, employing money base Welding connect, distance on straight tube between two butt weld centers is greater than the external diameter of pipe, length is greater than 200mm, seal in pipe welding seam and edge 200mm thereof, the size of welding seam distance pipeline starting point is greater than 100mm, and the ring-like weld pitch support of pipelines of pipeline, suspension bracket clearance distance are greater than 50mm, the fixing butt welding of pipeline, mating interface must not welding by force, and its inwall alignment tolerance is less than 10% of wall thickness, and puts firmly by pipeline pad; Carry out appearance quality inspection after having welded, and carry out preservative treatment on surface, forbid to carry out on pipeline with pressure to weld, perforate, the operation such as cutting, must medium in exhausting pipeline, making after Pressure Drop to zero can operation;
D, be familiar with drawing, understand the trend of pipeline, the specification material of branch and pipeline, mounting point, construction in line with the drawings, with connecting between argon arc welding welding system pipeline, when system pipeline is through wall or base plate, add PVC casing protection, support of pipelines is evenly arranged, and main line is arranged in pipe well, in furred ceiling, secondary duct is installed, setting height(from bottom) adjusts according to erecting bed, and secondary duct support maximum spacing is 2m, and main pipeline support maximum spacing is 2.5m; Support of pipelines lays along wall or pillar, and the suspension bracket of station intermediate conduit is arranged on the below of beam, and gas pipeline adopts independently suspension and support, and insulating material is established in steel pipe and suspension and support contacting point; Pipeline Crossing Program construction wall arranges sleeve pipe, between pipeline and pipeline, adopts incombustibility sealing material to seal, and in care station setting pressure table case, the ventilation channel of each berth all passes from the corner in each ward, covers with aluminium alloy decorative cover; Construct by process flow diagram order, when field condition is restricted, project quality person liable adjust according to actual conditions, and report technique responsible engineer to confirm; The support installing of pipeline is firm, gas main adopts A-frame to be total to frame and lays, pipeline and support pipe clamp are fixed, between support, ultimate range meets shown in table 5, install in oxygen channel process, when needing to knock pipeline, wooden mallet or rubber mallet knock, and note preventing pipeline from being scratched by hard object, prevent from bending, flattening;
Table 5 medical gas piping support and hanger maximum spacing
(7) pipeline strength test
After Pipe installing, the each pipe joint of first check system, node and support of pipelines, then inflate in pipeline, preliminary experiment is carried out with air, when pressure rises to 50% of test pressure, observe the situation of pipeline, then boost step by step by 10% of test pressure, every grade of voltage stabilizing 5 minutes, until test pressure; Voltage stabilizing is after 10 minutes, then by Pressure Drop to design pressure, the dwell determines according to leakage detection work;
(8) blowing pipeline
After pipeline strength pass the test, establishment purge scheme, nitrogen or pressurized air is adopted to carry out blowing pipeline as medium, first support is checked before purging, and reinforce, the modulating valve of orifice plate, Flange joint, throttle valve, safety valve and instrument are dismantled, the valve of welding and instrument taked flow through bypass or lay down valve head and valve seat adds protecting jacket, arrange simultaneously and purge forbidden zone, prevent blow-off outlet foul, foreign material blow on wall, on ceiling board, each blow-off outlet place forbids the people that stands, prevent the foreign material be blown from wounding, open the room door and window of each purging sewage draining exit; The weld seam of pipeline, turning, branch and dead angle place is knocked with wooden mallet, until iron rust, dust moisture and other foreign material disappear in blowing pipeline process; After purging end-of-job, the valve device pulled down is recovered, and seals each blow-off outlet, carry out purging record;
(9) equipment belt is installed
After blowing pipeline, according to design drawing requirement, on centerline stop valve and oxygen quick socket are installed, the setting height(from bottom) of quick socket makes to cover greatly rear quick socket top and exceeds panel, equipment belt interior conduit bulb is aimed at oxygen quick socket center, then screw in nut, screw up with a wrench, after equipment belt assembling, carry out pressure test and air tightness test; Equipment belt EXPANSION ANCHOR BOLTS is fastened on the wall of ward, and setting height(from bottom) meets design drawing requirement;
(10) valve installation
After equipment belt installs, first check the quality certification of valve and check inspection, installing by the specification that design drawing is indicated, model and position, when drawing not being indicated position and height, according to execute-in-place, angle design easy to maintenance and attractive in appearance; During installation the direction of arrow of valve and the direction of media flow consistent, valve rod upwards or substantially horizontal install;
(11) air tightness test
After valve installation, pass into gas to the pipeline tested, container, pressurize 24 hours, observed manometric change every 2 hours, then calculates leak-down rate; Leak-down rate is to be less than 0.5% for qualified.Formula:
A＝100(1-P2T1/P1T2)/t
In formula: A---hour leak-down rate, %;
P1---pressure during on-test, MPa;
T---test period, h;
P2---pressure during off-test, MPa;
T1---temperature during on-test, K;
T2---temperature during off-test, K.
Middle pressure medical gas pipeline is tested, and its medium is clean water, and test pressure is 1.5 times of piping design pressure; Low pressure medical gas pipeline is tested, and its medium is air or nitrogen, and test pressure is 1.15 times of piping design pressure; Medical vacuum pipeline is tested, and medium is air or nitrogen, and test pressure is 0.2MPa, and the test of medical gas pipeline pressure maintains test pressure 10 minutes, maintains the original state as qualified; Proof pressure and the air tight test pressure of pipeline are as shown in table 6:
Table 6 air tightness test and pressure test regulation
(12) pipeline ground connection
There is the pipeline of electrostatic grounding requirement, each section of pipe way conduction, the titanium pipeline connected with electrostatic grounding and stainless steel pipeline, wire cross-over connection or grounding conductor adopt titanium plate or corrosion resistant plate transition, conductive contact surfaces eliminates rust and connects, and tests after electrostatic grounding installs;
(13) stand in debugging
After pipeline ground connection, first instrument plug and oxygen humidifier plug are inserted each use terminal, check insert unload flexibility, interchangeability and tightness, at operating room and rescue room, two or more oxygen terminal is set respectively, check terminal flow with the flowmeter on oxygen humidifier again, each terminal flow is greater than 10L/min; Then carry out warning device test, close source of the gas, release gas in oxygen supply pipeline, when undervoltage alarming device sends sound and optic signal, write down pipeline pressure value, repeat 3 times, be calculated as follows, alarm pressure error should be met and be not more than 3%:
β＝100x∣pb-po∣/po
In formula: β---warning device relative error, %;
Pb---actual alarm force value, MPa;
Po---preset alarm pressure value, MPa.
(14) completion check
Storage tank checks the air supply system of having constructed, and registers engineering previous work, performance, initial test and trial run situation, economic technique analysis, start to come into operation after qualified after installing and terminating and debug in station.
Quality control method of the present invention:
(1) all raw material, components and parts, equipment and all cooperation parts, all carry out procurement at designated enterprises, and the selected of supply enterprise is investigated together with procurement staff by company technique personnel, and all material must be up to the standards through quality inspection portion and can put in storage;
(2) valve being greater than 1MPa for nominal pressure should carry out housing pressure test and leakage test one by one, underproofly must not to put in storage, valve nominal pressure being less than to 1MPa from often criticizing middle selective examination 10%, and should must not be less than 1, carries out housing pressure test and leakage test;
(3) every procedure of product manufacturing all must meet the processing drawing of this procedure and technology, the quality requirement of technical papers, otherwise must not proceed to next procedure;
(4) to the personnel being engaged in medical center oxygen supply, central suction systems engineering is installed, company carries out periodical training system, makes them understand, is familiar with corresponding mounting technique and relevant knowledge, and qualified through examining, and just can be engaged in the installation of corresponding engineering;
(5) project installation must be carried out by drawing, and technology department carries out technical annotation in construction to workmen before construction brigade sets out;
(6) pipeline of every one deck or a part must do pressure test and air tightness test after installing, and air tight test pressure gets the design pressure of pipeline, pressurize 24 hours, and an oxygen system hour leak-down rate is not more than 0.2%;
(7) oxygen system pipeline and element are forbidden contacting with each quasi-grease, forbid to operate with the gloves of greasy dirt;
(8) pipeline welding must carry out welding by accredited welder, and welding procedure must through the qualified welding procedure of enterprise's welding procedure qualification.
Safety control measures of the present invention:
(1) adhere to system of telling somebody what one's real intentions are safely, before working every day, project leader also needs to do safety measure to all workmens and tells somebody what one's real intentions are except carrying out construction and telling somebody what one's real intentions are;
(2) strictly observe production safety and security against fire system, implement every safety measure, enter that job site wants to want wear safety belt when hard hat required at all times, high-lift operation, no smoking in job site;
(3) setting up of construction scaffold must observe regarding safety technique Regulations, quality standard and engineering safety administrative provisions, and setting up will neatly unification, meets safety in production and construction needs;
(4) safety signs of job site must be complete, eye-catching, facing the position safety prevention measures such as limit, hole, personnel's import and export must be perfect, when the place of vehicle, walk and the construction of upper and lower layers crossed space, ditch Jing Kan cave cover and construction marker should be set, carry on construction work at night and will ensure that Work places and related channel program have enough illuminations;
(5) the construction equipment position that should specify according to construction main flat face layout plan and circuit are arranged, and must not occupy arbitrarily road in field, construction equipment has to pass through safety inspection before marching into the arena, and qualifiedly on inspection can use;
(6) construction plant operator must set up unit responsibility system and take appointment with certificate according to pertinent regulations, forbid that person without license operates the equipment with other people operation of arbitrary-use without approval;
(7) portable power tool should check whether leaky before using, and construction distribution box should fill earth leakage protective device, must wear insulated shoes when wet area is constructed, and After Hours should pull off electric brake in time, pull out plug.
Environmental practice of the present invention:
(1) raw material in the storehouse of job site, components and parts, equipment, instrument should be classified and be put neat, and warehouse should keep cleaning, dry;
(2) set up will in line with needs, practicality for on-the-spot temporary facility, and the principle of making every effort to unified, attractive in appearance is carried out.Set up and will comply with relevant regulations, especially will meet safety in production and frpf requirement.Office, life, logistics facility more will accomplish the unification of indoor and outdoor and surrounding environment, and clean and tidy, health, attractive in appearance, saving should be made overall plans;
(3) project construction, administrative staff's duration of work should wear work clothes, use individual labor protective articles, different with job position according to operating feature, color separation dressing, and use chest card on duty;
(4) place such as project office, warehouse, workshop, dormitory will keep hygienically clean, and divides health and to be responsible for a task until it is completed district, regularly sweep.Staff canteen, Food and Drink Shop, buffet etc. will meet the regulation of national health regulation, keep sanitation and hygiene that are corresponding indoor and surrounding environment, emphasis protection against rodents, flyproof, dust-proof, regularly sterilize;
(5) project construction conscientiously should observe national and that local government the is clear and definite pertinent regulations about environmental protection, appropriate disposal constructional rubbish, waste water, waste residue, waste gas and construction noise, carry on construction work at night, dust etc., actively to take measures to carry out the comprehensive regulation, reach emission standard and dispose requirement;
(6) the concrete Liquified gas tanker of integration project construction is worked out corresponding modern-style construction way and conscientiously puts into practice; Clearly defining responsibilities, zoning, carries out management of dividing up the work and assign a part to each individual or group;
(7) after stage has worked, Demolition Construction temporary facility, has withdrawn construction equipment and place cleaning, repairs the site inside accesses road that contractor damages, withdraws irrelevant workmen.
These are only specific embodiments of the invention, but technical characteristics of the present invention is not limited thereto.Any based on the present invention, for realizing substantially identical technique effect, done ground simple change, equivalent replacement or modification etc., be all covered by among protection scope of the present invention.
Claims (4)
1. Medical liquid-state oxygen central gas supply system construction, is characterized in that comprising the steps:
(1) preparation of construction
Be familiar with and examination construction drawing, understand that the medical gas project is reserved on drawing, pre-buried hole and pipeline position, in conjunction with civil engineering structure construction drawing, check civil engineering unit to have boxed out absolute altitude, the coordinate in hole, then working drawing budget is worked out, list the workload of each subdivisional work, determine each subdivisional work materials, recruitment and facility service condition in installing engineering, and be aggregated into table, then installing engineering construction technical schemes is worked out, determine the technical measures taked, write the record of telling somebody what one's real intentions are of safety and technical elements, last organizing construction personnel carry out technical training; Choice and design storage tank fabricating yard, designs ground bearing capacity, the walkway charging tank car, ventilation condition, gutter and Environmental security, and tank car transfusion metallic hose length is less than 4 meters, and storage tank is less than 3 meters to the position of automobile; Weight after charging according to storage tank and local geology state, undertaken constructing and maintenance by buider's work drawing requirement;
(2) storage tank lifting
Storage tank housing end socket is provided with two hangers, the left and right leg in storage tank housing front respectively has a hanger, there is the loop wheel machine of two winchs that storage tank is upright or set level by erectility by level with one, before lifting, first carry out examination hang, check the stationarity and reliability of slinging, then start to raise and hang to move;
(3) convey
Convey adopts non-packed, first storage tank is placed on transport vehicle bracket, and with steel band, storage tank and two pallet for transporting are bundled, when storage tank level is placed on two pallet for transporting, upward, stainless steel end socket drawn by pipeline bottom storage tank housing to the front vertical of storage tank, and storage tank and pallet for transporting and means of transportation are connected firmly, when changing means of transportation in transportation process, carry out lifting operation by the requirement of lifting;
(4) storage tank is installed
When storage tank transports to scene, Infrastructure does not complete, and presses the method for lifting by same for storage tank pallet for transporting, hang oneself, be placed on the place of protective measure from car with loop wheel machine; When storage tank transports to scene, during installation in position conditions being possessed, first storage tank is hung oneself from car and transfers to ground, then take the steel band that two pallet for transporting and storage tank bundle apart, then by the requirement of lifting carry out storage tank rising, upright, hang the operation in place moved; After storage tank installation in position, check valve pipe-line system, carries out air tightness test with pressure to valve, is connected by the use interface of storage tank with corollary system pipeline;
(5) pipeline degreasing
Carry out degreasing by designing requirement, formulate the degreasing measure of pipeline according to the soiled condition of pipeline working medium, pipe material, caliber, pipe; Be placed on there being the pipe of oil stain and corrosion in slot type receptacles and clean with aqueous slkali, buck is cleaned again with clear water, finally use organic solvent degreasing, soak 2 hours in degreaser, pipeline after degreasing and clean dry its inwall of filter paper wiping of workpiece, until grease vestige disappears on paper, or use ultraviolet lamps irradiates degreased surface, until purple fluorescence disappears; Rinse internal surface with clear water, after rinsing well, ventilation is dried again, then closes the mouth of pipe to the qualified pipeline of degreasing and workpiece;
(6) Pipe installing
A, elder generation measure size according to drawing requirement, and the transplanting made marks, then with hacksaw or abrasive wheel cutting machine cutting, file deburring with file after cutting, cut ends face tilt deviation is less than 1% of tube outer diameter, and length is less than 3mm;
B, employing clod wash method bend oxygen channel, and be used in the pipeline that pressure is greater than 3MPa, bending radius is greater than 5 times of tube outer diameter, and other pipelines are greater than 3.5 times of tube outer diameter, and the angle of tube bending is greater than 90 ゜, and curved flat degree is less than 8%;
C, employing money base Welding connect, distance on straight tube between two butt weld centers is greater than the external diameter of pipe, length is greater than 200mm, seal in pipe welding seam and edge 200mm thereof, the size of welding seam distance pipeline starting point is greater than 100mm, and the ring-like weld pitch support of pipelines of pipeline, suspension bracket clearance distance are greater than 50mm; Carry out appearance quality inspection after having welded, and carry out preservative treatment on surface;
D, be familiar with drawing, understand the trend of pipeline, the specification material of branch and pipeline, mounting point, carry out procedure qualification and work out job instruction, construction in line with the drawings, with connecting between argon arc welding welding system pipeline, when system pipeline is through wall or base plate, add PVC casing protection, support of pipelines is evenly arranged, main line is arranged in pipe well, in furred ceiling, secondary duct is installed, setting height(from bottom) adjusts according to erecting bed, support of pipelines lays along wall or pillar, the suspension bracket of station intermediate conduit is arranged on the below of beam, gas pipeline adopts independently suspension and support, insulating material is established in steel pipe and suspension and support contacting point, Pipeline Crossing Program construction wall arranges sleeve pipe, between pipeline and pipeline, adopts sealing material to seal, and in care station setting pressure table case, the ventilation channel of each berth all passes from the corner in each ward, covers with aluminium alloy decorative cover, construct by process flow diagram order, when field condition is restricted, project quality person liable adjust according to actual conditions, and report technique responsible engineer to confirm,
(7) pipeline strength test
After Pipe installing, the each pipe joint of first check system, node and support of pipelines, then inflate in pipeline, preliminary experiment is carried out with air, when pressure rises to 50% of test pressure, observe the situation of pipeline, then boost step by step by 10% of test pressure, every grade of voltage stabilizing 5 minutes, until test pressure; Voltage stabilizing is after 10 minutes, then by Pressure Drop to design pressure, the dwell determines according to leakage detection work;
(8) blowing pipeline
After pipeline strength pass the test, establishment purge scheme, nitrogen or pressurized air is adopted to carry out blowing pipeline as medium, first support is checked before purging, and reinforce, the modulating valve of orifice plate, Flange joint, throttle valve, safety valve and instrument are dismantled, the valve of welding and instrument is taked flow through bypass or lay down valve head and valve seat adds protecting jacket, arrange simultaneously and purge forbidden zone, open the room door and window of each purging sewage draining exit; The weld seam of pipeline, turning, branch and dead angle place is knocked with wooden mallet, until iron rust, dust moisture and other foreign material disappear in blowing pipeline process; After purging end-of-job, the valve device pulled down is recovered, and seals each blow-off outlet, carry out purging record;
(9) equipment belt is installed
After blowing pipeline, according to design drawing requirement, on centerline stop valve and oxygen quick socket are installed, the setting height(from bottom) of quick socket makes to cover greatly rear quick socket top and exceeds panel, equipment belt interior conduit bulb is aimed at oxygen quick socket center, then screw in nut, screw up with a wrench, after equipment belt assembling, carry out pressure test and air tightness test; Equipment belt EXPANSION ANCHOR BOLTS is fastened on the wall of ward, and setting height(from bottom) meets design drawing requirement;
(10) valve installation
After equipment belt installs, first check the quality certification of valve and check inspection, installing by the specification that design drawing is indicated, model and position, when drawing not being indicated position and height, according to execute-in-place, angle design easy to maintenance and attractive in appearance; During installation the direction of arrow of valve and the direction of media flow consistent, valve rod upwards or substantially horizontal install;
(11) air tightness test
After valve installation, pass into gas to the pipeline tested, container, pressurize 24 hours, observed manometric change every 2 hours, then calculates leak-down rate;
(12) pipeline ground connection
There is the pipeline of electrostatic grounding requirement, each section of pipe way conduction, the titanium pipeline connected with electrostatic grounding and stainless steel pipeline, wire cross-over connection or grounding conductor adopt titanium plate or corrosion resistant plate transition, conductive contact surfaces eliminates rust and connects, and tests after electrostatic grounding installs;
(13) stand in debugging
After pipeline ground connection, first instrument plug and oxygen humidifier plug are inserted each use terminal, check insert unload flexibility, interchangeability and tightness, at operating room and rescue room, two or more oxygen terminal is set respectively, check terminal flow with the flowmeter on oxygen humidifier again, each terminal flow is greater than 10L/min; Then carry out warning device test, close source of the gas, release gas in oxygen supply pipeline, when undervoltage alarming device sends sound and optic signal, write down pipeline pressure value, repeat 3 times;
(14) completion check
Storage tank checks the air supply system of having constructed, and registers engineering previous work, performance, initial test and trial run situation, economic technique analysis, start to come into operation after qualified after installing and terminating and debug in station.
2. Medical liquid-state oxygen central gas supply system construction according to claim 1, it is characterized in that: the described storage tank in step (2) comprises inner core, urceolus, top cover and bottom, the end face of described top cover is provided with at least two described hangers, the inside of described top cover is provided with boosting coil pipe, described boosting coil pipe is provided with pressure valve, described inner core is positioned at the inside of described urceolus, oxygen distributor and air temperature type vaporizer is provided with between described inner core and described urceolus, the end face of described air temperature type vaporizer is provided with fluid inlet, described fluid inlet connects described boosting coil pipe, the bottom surface of described air temperature type vaporizer is provided with gaseous phase outlet, described gaseous phase outlet connects described oxygen distributor, the bottom surface of described bottom is provided with leg, described leg is provided with described hanger, the side of described urceolus is provided with liquid level visualization mouth, pressure gauge and steam outlet pipe.
3. Medical liquid-state oxygen central gas supply system construction according to claim 2, is characterized in that: the bottom of described inner core is provided with adsorption layer.
4. Medical liquid-state oxygen central gas supply system construction according to claim 2, is characterized in that: the inside of described bottom is provided with isolation layer.
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| CN104014562B (en) * | 2014-05-20 | 2016-02-10 | 天津市管道工程集团有限公司 | High-purity gas long lines inwall cleans integrated artistic |
| CN104634016B (en) * | 2015-01-30 | 2017-02-22 | 中国科学院力学研究所 | CO2 experiment system liquid work medium injection device and method |
| CN106148982A (en) * | 2015-04-02 | 2016-11-23 | 上海航天设备制造总厂 | A new generation's carrier rocket boosting module liquid oxygen pipe-line system degreasing method |
| CN106044235B (en) * | 2016-06-12 | 2018-01-09 | 青岛海川建设集团有限公司 | Medical pneumatic pipeline material flow Transmission system construction technology |
| CN108954002A (en) * | 2018-08-31 | 2018-12-07 | 嘉兴智慧园区营运管理有限公司 | A kind of automatic compression air system |
| CN111927034A (en) * | 2020-09-17 | 2020-11-13 | 云南能投达诺智能科技发展有限公司 | Construction method of intelligent laboratory centralized gas supply system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0877195A1 (en) * | 1997-05-09 | 1998-11-11 | Praxair Technology, Inc. | Process and apparatus for backing-up or supplementing a gas supply system |
| CN201764246U (en) * | 2010-07-02 | 2011-03-16 | 武汉钢铁(集团)公司 | Novel poor krypton xenon liquid oxygen storage tank |
| CN103090188A (en) * | 2011-11-01 | 2013-05-08 | 中煤能源黑龙江煤化工有限公司 | Liquid oxygen system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2706192A1 (en) * | 1977-02-14 | 1978-08-17 | Siemens Ag | Anaesthetic respirator with pressurised container - has throttle in liq. container between oxygen supply and bellows to control mixt. |
| JP4051366B2 (en) * | 2004-08-23 | 2008-02-20 | 岩谷瓦斯株式会社 | Liquefied gas tank and method for filling liquefied gas into the tank |
-
2014
- 2014-02-13 CN CN201410049418.1A patent/CN103791227B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0877195A1 (en) * | 1997-05-09 | 1998-11-11 | Praxair Technology, Inc. | Process and apparatus for backing-up or supplementing a gas supply system |
| CN201764246U (en) * | 2010-07-02 | 2011-03-16 | 武汉钢铁(集团)公司 | Novel poor krypton xenon liquid oxygen storage tank |
| CN103090188A (en) * | 2011-11-01 | 2013-05-08 | 中煤能源黑龙江煤化工有限公司 | Liquid oxygen system |
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