Fire distance allows the installation of air conditioning unit?

With the development of China's medical care, medical building construction scale and standards have been greatly improved, medical gas system in the project to get a wide range of due, but also promote the improvement of its technology and technical level. Medical gas system includes high and low pressure oxygen, vacuum suction, compressed air, carbon dioxide, nitrogen, laughing gas and so on. Low-pressure oxygen and vacuum suction are used in general ward buildings, and the rest of the gases are mainly used in operating rooms, ICUs and so on. In our design of the new ward building project are applied. The following is a brief introduction of the medical gas system in the ward building combined with the application in the actual project for your reference. First, the central oxygen system The central oxygen system includes liquid oxygen storage tank (manifold), vaporizer, pressure reducing device, safety alarm device, oxygen constant pressure monitoring device, pipeline and terminal components, the system conveys the pressure through the liquid oxygen vaporization to achieve, stored in the storage tank of liquid oxygen through the vaporizer after vaporization, after the pressure reducing device to O.3-0.5Mpa pressure reduction, through the pipeline delivery to the operating room, monitoring room, Ward and other terminals. In the larger system, due to the different pressure requirements of the terminals, the second decompression can be used, the liquid oxygen is once decompressed to 0.8-1.OMpa, and then transported to the functional sub-districts for the second decompression to the use of pressure. Oxygen source part of the oxygen source to liquid oxygen-based, in the three hundred beds below the small hospitals also use oxygen cylinders, but to liquid oxygen is the most safe and reliable. Recently, oxygen generator is also used in some hospitals, but it should have better maintenance and management level. Liquid oxygen storage tanks, vaporization and decompression devices located in the outdoor, according to the distance from the building in the fire code has not been clearly specified, the design of the reference gas vaporization station fire separation. 2. Safety and alarm device This part consists of safety valve and sound and light electronic alarm device, the alarm device is installed in the duty room, when the oxygen source and the whole system pipeline output pressure is lower or higher than the rated value, it will issue sound and light signals, notify the duty personnel to take appropriate measures to adjust the system to operate normally. 3. Oxygen constant pressure control, monitoring device In order to ensure the stability of oxygen pressure on each floor, a constant pressure monitoring device is installed on the branch pipeline on each floor, generally located in the nurses' station and other places where there are people on duty, so as to ensure that the oxygen pressure on each floor is not lower than 0.35Mpa, so as to realize the continuous and stable supply of oxygen. 4. Oxygen delivery pipeline Oxygen delivery pipeline connects oxygen source and terminals, oxygen pipeline can be installed openly, can also be installed in the tube well, but should avoid heat, gas and electricity pipeline, preferably located in an independent tube well, pipeline resistance checking calculation table calculation, the control system pressure loss of not more than 10%. Piping materials: oxygen piping is usually used copper pipe, it has a full specification, easy to process the characteristics of some projects used in the material 1Crl8Ni9Ti stainless steel pipe, the material is better than copper pipe, but the construction process requires a higher. Oxygen piping should be degreased before installation. Terminal Oxygen supply terminal adopts fast self-sealing plug type connector, when using the oxygen inhaler with fast plug into the positioning disk terminal, automatic positioning and jamming, open the inhaler switch can be oxygen, not use when unplugging the oxygen absorber, the positioning disk terminal automatically reset to ensure that the gas does not leak. Oxygen supply terminal is usually installed in the bedside equipment belt with suction, call, etc., and the operating room is connected to the operating room tower. Second, the center of the suction system Center suction system has a vacuum pump, negative pressure automatic control cabinet, vacuum tanks, alarms, sewage tanks, piping systems and terminals. Negative pressure adjustment range: -0.03Mpa ~ -0.08Mpa. 1. central suction station central suction station design should take into account the impact of noise, its location should be far away from the work room or in the outdoors, away from the water supply, the kitchen and other health requirements of the room, the noise value should be controlled within 70 dB. Vacuum pumps are set up two, both for each other as a backup, but also in the startup of simultaneous operation, now more water ring type, the machine room needs to be introduced into the supply and drainage pipes, design of flushing faucet and drainage ditch. However, the dirt collecting tank dirt should be sterilized separately. Vacuum pump exhaust is a contaminated gas, should be designed to filter and disinfection devices. 2. Automatic control cabinet Electronic control cabinet control two vacuum pumps, a backup, to ensure uninterrupted negative pressure system, the two units can work alone, but also at the same time to start, and in the pressure beyond the fluctuation range, the sound and light alarm signal. 3. Piping system and terminal Negative pressure piping system does not require high material, mainly using galvanized steel pipe, the room's branch piping using copper pipe to facilitate installation, if conditions should be used stainless steel pipe, material 0Crl8Ni9 stainless steel pipe is a better alternative to the pipe. The galvanized steel pipe is silk-joined, and the steel pipe and copper pipe are silver soldered. The terminal adopts quick-plug type connector, and the terminal comes with a maintenance switch, which can be maintained separately without affecting the use of other terminals. Third, the compressed air system The compressed air system and the center of the attraction system has similar characteristics, by the compressor, tank, dryer, filter, control and protection devices, pipelines and terminals, the compressor using two, each other as a standby, the distribution capacity should be in accordance with the design of the two units, compressed air piping design calculations, _ general control system of the total pressure drop of not more than O.3Mpa, the output pressure of the mouth for the 0.1MDa Around. The piping system adopts copper or stainless steel pipe. Fourth, the other gas system Laughing gas station, carbon dioxide station, nitrogen station are used in the gas cylinder group manifold and automatic switching device, because it is mainly used in the operating room, small-scale projects can be set up in the operating room near the pipeline in order to save the larger project should be centralized and oxygen attraction station, etc., in order to facilitate the management. The pipe material is mainly purple copper pipe. Because the gas cylinder needs to be replaced, the station is located in a convenient location for transportation as much as possible, and it is best to have a direct exit to the outside world. V. Other professional requirements 1. building professionals should be reserved in the design phase of the location of the room, the central oxygen and attraction room needs 40-50 square meters, other gases are mainly used in the operating room, such as centralized set of rooms, carbon dioxide, laughing gas, nitrogen station needs about 50 square meters, compressed air station needs 20-30 square meters. And the duty room should be set up. Oxygen station needs to design fire doors, fire level according to the building category to determine. 2. In addition to the duty room, other rooms without air-conditioning requirements, but should ensure that the room has good ventilation, especially in the basement of the room, should be designed to supply and exhaust system, exhaust system is best to set up independently, in the project has been built, we are usually designed according to the 6 times the air change. 3. All kinds of gas pipelines should be reliably grounded, and the grounding resistance should be less than 10 ohms. The central oxygen station adopts explosion-proof lighting and exhaust fan, and the central attraction station should adopt waterproof lamps. Sixth, the system test and acceptance pipeline installation should be carried out after the pressure resistance test and air tightness test, pressure resistance test allows segmentation, oxygen station, nitrogen station, laughing gas station, carbon dioxide station pipeline using clean water for hydraulic test, the test pressure for the design pressure of 1.5 times. Other parts and compressed air system, the center of the attraction system test medium for pure compressed air or nitrogen, the test pressure for the design pressure of 1.15 times. Airtightness test medium should be pure compressed air or nitrogen, the test pressure for the highest working pressure, the requirement of holding pressure for 24 hours. Medical building gas system does not have a special acceptance specification, more than the use of ~ some industrial standards, including the following: YY / T0187-94 "Medical Center Oxygen System General Technical Conditions" YY / T0186-94 "Medical Center Attractive System General Technical Conditions" GB50235-98 "Industrial Piping Engineering Construction and Acceptance Specification" GB50236-98 "on-site". GB50236-98 "field equipment, industrial pipeline welding project construction and acceptance norms" GB50184-93 "industrial metal pipeline project quality inspection and evaluation standards" Medical gas system for the architectural design, belongs to the relative edge of the content of the detailed installation drawings are usually completed by the professional manufacturers themselves, but inevitably in the building itself produces a lot of contradictions. Therefore, engineers should be familiar with its various characteristics and requirements, in the design of the building to make the use of function more perfect

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