【 Weak current college 】 building equipment automatic control management systems engineering construction site coordination and control

Construction content overview
Building equipment and automatic control management system monitoring range mainly in ventilation and air conditioning systems, distribution systems, lighting systems, power systems, water supply and sewerage system, heating and heat exchange systems, refrigeration and cooling system, elevator and escalator system and other subsystems. As the building equipment and automatic control management system, responsible for the entire building electrical and mechanical equipment for centralized monitoring and control, guarantee the normal operation of all equipment, and achieve optimal state. At the same time, in support of computer software, information processing, data, calculations, data analysis, logic, pattern recognition, etc., thereby enhancing the building equipment and automatic control system of high standards of modern management and services.
Building equipment and automatic control management system using hierarchical structure, first tier computer control center, second level intelligent substation controller and a third layer of data acquisition and control Terminal.
1. the computer control center
System host uses PII-type of computer, and equipped with dedicated printer. CRT using a graphical interface displays full, clear and intuitive. You can display various types of site plans, system diagram, configuration diagram, you can display the control device and control point for the running and operating parameters. System, various types of alarm information, text, reports, and device running parameter can be output from the printer. Computer control center, in addition to the host, but also the preparation of more than one computer, either separately or together to complete the building equipment control subsystem monitoring management, while at the computer control center, more than one subsystem computer and host mutual networking use.
2. the main task of the intelligent substation controller
(1) field collected data processing (filtering, amplification, conversion).
(2) field data and on-site equipment running check and alert processing.
(3) data continuously adjustable and sequential logic operations control and management.
(4) control and data network, and host subsystem of computers for data exchange, while the upward transport field acquisition of data and equipment operating status information, at the same time receive the upper management of computer instructions, issued by the immediate parameter set or modify.
3. data acquisition and control Terminal
(1) data collectors mainly on monitoring objects such as temperature, humidity, harmful gases, fire detector detection, flow, pressure, and other on-site simulation data acquisition.
(2) control Terminal main control object for pumps, valves, controllers, switches, etc., and on managed devices such as valve size, adjust the throttle of the opening, etc.
Construction site coordination points
1. construction and civil engineering structures with points
(1) building equipment automatic control management system computer control center of the engine, combined with the civil construction, construction of the pipeline for concealed, and set aside a good through wall, floor hole or holes for easy wall or floor sleeves.
(2) cooperate with the civil structure construction concealed pipeline to control Terminal, reserved box (carton), etc.
(3) Cabinet need equipment base, should provide the basis for civil engineering equipment and room location geometric dimensions of layout drawings, construction by civil professional assistance.
2. the renovation works and civil engineering construction coordination points
(1) the computer control Center computer lab on the construction of indoor decoration requirements:
1) room interior decoration should use hermetically without dust, easy to clean and changes in temperature and humidity under deformation small material.
2) walls and ceiling surfaces must be smooth, reduce fouling, and should avoid glare. As for plastering, shall conform to the requirements of advanced plastering.
3) should the laying of floor. Movable floor should be consistent with current national activities in the computer room with floor-technical specifications of requirements. The height should be the actual installation will need to determine the effectiveness of 200 ~ 350mm.
4) activities under the floor decorated the walls of the ground and may use the plastering cement mortar. Floor material should be smooth, durable. When the activities under the floor space for static pressure Chamber, the walls and floor are selection does not dust, ash, easy cleaning of the facing materials.
5) ceiling to choose no dust absorption material, such as ceiling above only as application pipeline, its walls should be plastering, floor bottom surface should be clean; when the ceiling above the space for static pressure Chamber, the top and the walls are plastered and painted not peeling paint finishes its pipeline, also should use non-dust material.
6) decorative materials can take measures against static electricity. Indoor tint should be simple and elegant and soft.
7) room with exterior Windows, the use of double-layer metal sealing Windows and avoid direct sun. When using aluminum alloy window, the window can be closed with single-layer, but the glass should be hollow glass.
8) when the engine is equipped with water equipment, should take effective prevent drainage overflow and leakage measures.
9) near the engine room and the vibration of the noise should be controlled.
10) room decoration material should use nonflammable materials or difficult burning materials.
11) engine room safe export, should not be less than 2, and ends in the engine room yishe. The door opened, should be evacuated direction corridors, stairwells should be smooth, and there are clear signs of evacuation.
(2) requirements for the professional in charge of construction, on their own need to join into the people management network and monitoring layer network device statistics, the number of interfaces, various module specifications, quantity should meet your needs.
(3) according to the various professional verification interface, device monitoring, control and measuring pipeline connection and network connection.
(4) temperature and humidity sensor installation:
1) temperature and humidity sensor should not be installed in direct sunlight should keep away from strong vibration, electromagnetic interference zone, its location cannot undermine the appearance of a beautiful building with integrity, outdoor setting of temperature and humidity sensors should have the weatherproof enclosure.
2) should keep away from doors, Windows and outlet location such as cannot be avoided, and the distance shall be not less than 2m.
(5) the wind pipe-type temperature and humidity sensor installation:
1) sensors should be installed in a smooth, reaction speedTemperature of the location and ease of debugging, maintenance.
2) sensor in duct insulation layer is finished installing, and installed in the duct should avoid straight or corner of the location of air duct and steam vents.
(6) water temperature sensor installation:
1) water temperature sensor should process piping prefabrication and installation at the same time.
2) hole and welding work, must be in the process pipeline anti-corrosion, lining, sweeping and pressure testing.
3) water temperature sensor installation location should be in the water flow and temperature sensitive and representative of local, it is not advisable to select something, such as resistance in the valve and flow velocities in the vicinity of the dead and vibration larger location.
4) tube-type temperature sensor applications are greater than 1/2 pipe diameter, can be installed on top of the pipe; if interested applications is less than the tube diameter 1/2, should be installed in the side or bottom of the pipe.
5 pipes-type temperature sensor) is not installed on the edge of the welds and the hole and the welding point.
(7) pressure, pressure sensors, pressure switch to install:
1) sensors should be installed in the ease of debugging, maintenance location.
2) sensors should be installed in temperature and humidity sensor in the upstream side.
(8) air duct pressure, pressure sensor in duct insulation is finished installing. Should be installed in a straight line segment, as can not be installed in a straight line segment, you should avoid the wind tube ventilation corners and steam vents.
(9) water pipes, steam pressure and differential pressure sensor installation should process piping prefabrication and installation of both, their openings and welding work must be in the process pipeline anti-corrosion, lining, sweeping and pressure testing. Should not be installed in the pipeline welds and on the edge of the hole and the welding point. When straight is greater than the pipe diameter of 2/3, can be installed in piping piping diameter at the top; less than 2/3, can be installed in the side or bottom position of the flow velocity stability, should not be selected in the valve, resistance parts of dead near, flow velocity and vibration larger location.
(10) installed wind pressure differential switch, it is expedient that film is perpendicular to the plane. Installation height from the ground shall be not less than 0.5m, installation should be in the air duct insulation layer is finished, the installation in the ease of debugging, maintenance, and shall not affect the air conditioner ontology sealing, line through the hose and the pressure differential switch connection and should avoid steam vents.
(11) flow switch to install:
1) flow switch installation, process piping prefabrication, installed at the same time. Not suitable for installation in the weld on the edge of a hole and the welding point; it should be installed in a horizontal pipe, should not be installed in a vertical pipe; should be installed in the ease of debugging, maintenance.
2) flow switch holes and welding work, must be in the process pipeline anti-corrosion, lining, sweeping and pressure testing.
(12) electromagnetic flowmeter installed:
1) electromagnetic flowmeter should be installed in avoiding strong AC and DC magnetic field or violent vibration.
2) comb gauge, measured medium and technology pipeline between equal potential should be can't even sing, and should be ground.
3) electromagnetic flow meter should be set in the flow control valve upstream upstream of the meter shall have a straight pipe, length L = 10D (D-diameter), L = lower segments should have 4 ~ 5D of straight pipe.
4) in a vertical pipe installation, liquid flows from the bottom up, to ensure that the conduit full measured liquid or not produce bubbles; horizontal installation, you must make the electrode in the horizontal direction to ensure measurement accuracy.
(13) turbine type flow sensor installation:
1) turbine type flow sensor should be installed in the ease of maintenance and avoid vibration, avoid the magnetic and thermal radiation.
2) turbine type flow sensor installed horizontally, fluid direction must be the sensor on the shell of the flows to symbol as shown. If there are no signs that determine the direction of the import methods: fluid-collector tip, diversion with round holes, and fluid outlet diffuser is not sharp, no hole.
3) when possible counter-trend, flow transmitter installed behind the check valve. Flow transmitter should be mounted on the measuring point upstream, margin pressure point (3.5 ~ 5.5) D; measuring the temperature setting on the downstream side, flow sensor (6 ~ 8) D location.
4) flow sensor needs to be mounted on a length of straight pipe, to ensure a smooth pipe velocity. Flow sensor upstream should have 10 times the diameter length of straight pipe, downstream has five times the diameter of the tube length. If the sensor before and after the installation of the valve in the pipeline and the pipeline necking, bending, impact traffic stable equipment, straight pipe length also increased correspondingly.
5) signal transmission line use masking and cable insulation layer of protection, it is expedient in controller side grounding.
(14) power transmitter installation:
1) electric transducer installation in the monitoring of high-voltage switch cabinet, or installed in a separate electric transducer Cabinet, according to the manufacturer of wiring diagram for the connection.
2) transmitter wiring, prevent its voltage input-side short circuit and current input.
3) it should be noted that the transmitter input and output side of the scope and design and the signal controller.
(15) air quality sensor:
1) air quality sensor installed in the ease of debugging, maintenance, should be in the air duct insulation layer is finished installing.
2) air quality sensors should be installed in the duct of straight pipe, if not installed on the straight pipe, you should avoid the wind tube ventilation corner location installation, while avoiding steam vents.
(16) fan-coil controller, the electric valve installation:
1) temperature control switch and other off-by-side installation, is apart from the ground level should be consistent, height difference should not be greater than 1 mm; with other switches installed in the same room, height difference should not be greater than 5mm; temperature control switch form factor is not the same as with other switch, to bottom height.
2) electric valve arrow point to be consistent with the direction of flow.
3) fan coil electric valve should be installed in the fan-coilPipe back to the water pipe.
4) four-pipe fan coil of hot and cold water pipes, electric valves used for protection of ground wire.
5) rooms, energy saving fan coil temperature control systems with energy-saving system connection.
(17) solenoid valve installation:
1) solenoid valve body arrow point to be consistent with the direction of flow. Air conditioner electromagnetic valve with bypass next should normally be run.
2) electromagnetic valve diameter and pipe sizes do not match, you should use the reductive pipe fittings, valve diameter General should not be lower than the pipe diameter of two levels.
3) executive bodies should be fastened, hand wheel should be easy-to-use location. Mechanical drive flexibility, no loose or jam.
4) of the valve position indicates that the device of electric valve, valve position indicates that the device should be oriented to facilitate the observation position.
5) solenoid valve installation should be installed using the instructions provided to check the coil and the resistance between the valve body. If conditions permit, the solenoid valve in the installation to a simulation test action and pressure testing.
6) solenoid valve normally installed on the return pipe mouth rinse in the pipeline should be fully open before.
(18) electric regulating valve installation:
1) check the electric regulating valve of input voltage and output signal and wiring methods, should be consistent with the product specification of requirements.
2) electric regulating valve installed, you should avoid to bring additional pressure regulating valve, control valve installed in the pipeline long place, mounting bracket and the measures taken to avoid vibration.
3) check electric regulating valve of the model, the material must meet the design requirements, their body strength, spool leakage via test must meet product specifications.
(19) electric damper drive installation:
1) air-valve controllers to open and close the arrow point to open and close with the throttle; and wind direction valve shaft connections should be fixed in prison; air valve opening and closing of mechanical organs should be flexible, no loose or jam.
2) air valve controller after installation, air valve controller is in poor condition indicates bits should be consistent with the actual situation in the air valve, air valve controller should be geared to facilitate the observation position.
3) air valve controller with air valve shaft installed vertically, the vertical angle of not less than 85 °; suitable for impersonation before installation.
4) air valve controller before you install, you should press the "Manual of check coils, body of resistance, voltage, the control of exports, it should be consistent with the design and product specifications of requirements.
5) air valve controller output torque must be air-valve required match, meet the design requirements.
6) air valve controller cannot directly and damper shaft connected, may be available through attachments and bezel axis, but its attachment device must ensure that the air valve controller rotation angle adjustment range.
Construction site control focus
(1) audit integration system diagram and layout plan and various subsystems of the system diagram and layout plan by have the legal qualification of the production and design units designed to confirm effective before use the blueprint for construction.
(2) integrated programmes need to confirm that the manufacturer of the device configuration to deepen (refinement) programmes, implementation specifications, origin and manufacturers. Due to the manufacturer's brand, model specifications, preparation of different, different origin is also different, so it is best to use a manufacturer's product for device configuration, so the interface problems between the various systems is also easy to solve.
(3) to audit the building equipment and automatic control management system project construction organization plan.
1) building equipment automatic control management system, the device materials ordering schemes, labour scheduling and construction schedule, and so should the General and civil engineering construction schedule, make sure that the total duration of a schedule.
2) on all major subsystems required by integrators for integrated monitoring, control and measurement points on specific requests, avoiding device is missing at the time of order to the list of forms available to the professional construction units, processing orders, considering a variety of interfaces.
3) building equipment automatic control management system technology gives the low-down:
① as this system more integrated subsystems, the professional coordination is critical, so various professional construction drawing examination it has missed the point, end point device interface meets the communication protocols and data transmission requirements, the issue of construction drawings found in time for the design change negotiating settlement.
② assist professional in processing orders on manufacturers make specific technical requirements to ensure that orders are not missing out on control, monitoring, etc.
4) building equipment automatic control management system debug outline:
① lists debugging must have required major subsystem should satisfy linkage, information transmission, and other design requirements and provisions.
② lists for the debugger, first of all system equipment installation engineering quality checks, with emphasis on checking the environment temperature, humidity, and power supply are to meet the requirement. Check whether or not a protective earthing devices; after inspection equipment for commissioning of monomers and testing; various subsystems check run are qualified to the final commissioning, the system linkage and software functional testing until the system acceptance.
5) works acceptance technical data sorting:
① system diagrams, design schematics, construction plans (including terminal block diagram).
② monitoring points table, parameter setting software (including logical diagram).
③ the product specifications (including product information, random).
④ monitoring point test data sheets, test reports, individual device software test reports, etc.