Again the fitting anti-blast lamps and lanterns will not produce electric arc, spark or may light the high temperature of explosive mixture under the normal running condition, and take measures to improve safe degree. GB3836 standard put forward the strict technical requirement for fitting again anti-blast lamps and lanterns structure, light source, test method.
1. Temperature survey. It is on the outer surface of the lamps and lanterns to separate the test of the exploding supreme surface temperature of anti-blast lamps and lanterns and click. Again the fitting anti-blast lamps and lanterns require their supreme surface temperature of any part should not exceed the regulation of the corresponding temperature group, the supreme surface temperature of the lamps and lanterns appears on the bubble shell of the light source. So adopt same light source through the intersection of temperature and group because of testing the difference ordered of lamps and lanterns of fitting etc. again of lamps and lanterns of exploding etc., one examines appearance, one examines inside Be lack of 1, 2 groups at least. Confirm the intersection of temperature and anti-blast lamps and lanterns of fitting etc. again of group, would not produce, can light explosive high temperature of mixture through the method.
2. The lamp stand adopts and separates the structure which produces. The part that may produce the spark while changing the bulb in the lamp stand of the intersection of spiral shell and mouth should be packed into single separating and is exploded in. In order to prevent the spiral bulb from becoming flexible in the lamp stand by oneself, fastening the square of manpower and fastens to exert oneself in the square and should accord with the demands for standard regulation of lamp stand. It should accord with the regulations of Fa6 lamp stand to have light foot and lamp stand of the actuator fluorescent lamp to participate in only, its structure is to separate the producing structure too. This kind of structure has avoided the production of the spark.
3. The part that switch, trigger,etc. may produce the spark or dangerous temperature should locate in and separate exploding, when or be able to reach the equal safe abundant shell of degree to locate in for instance, water one, fill sand,etc. ,In order to avoid lighting the flammable gas.
4. Choice of the light source. Compared with anti-blast lamps and lanterns of other types, again fitting requiring to be strictest to light source of anti-blast lamps and lanterns. Present lamps and lanterns that electric wire netting supply power, allow light source that adopt:
A, having the one that participated in only not to fluorescent lamp of the brightness opening device;
B, incandescent lamp for general purposes;
C, mixing all light mercury light flows from the town .
The above-mentioned several kinds of light sources will not present the temperature higher than the terminal temperature after at least 10s after the light source break in surprise. Fluorescent lamp of the brightness opening device does not participated in only, needn’t open the brightness device and help to open the brightness, and adopt the electric conduction and bring and open the brightness. This kind of light is in charge of after breaking, unable to maintain the normal working state, the electric conduction brought disconnection, can not make the light in charge of opening the brightness again either, the whole light is in charge of being in broken circuit state, will not make the filament produce the high temperature. And ordinary fluorescent lamp, after breaking, filament and opening the brightness device to form the return circuit, make the filament produce the harmful high temperature. The structure of light foot and lamp stand that this kind of light is in charge of accords with the requirement which separates the producing structure. The incandescent lamp is after the glass shell breaks, the inner vacuum state of the bulb is destroyed, the filament is burnt quickly, will not produce the high temperature continuously, mercury light actually an incandescent lamp and high-pressure mercury light flow to connect from the town in series, after the glass shell breaks, the incandescent lamp is burnt within extremely short time, thus make high-pressure mercury light form the broken circuit state, lower the temperature rapidly. Practice has proved, it is a very little incident of a probability that the light source installed in the lamps and lanterns breaks by oneself. In order to prevent the light source from being smashed by the contingency, again the fitting anti-blast lamps and lanterns resist the energy assaulted to the outer cover, have put forward very high requirement. The approximately harsh choice of the light source, have guaranteed the fitting anti-blast lamps and lanterns can be exploding in a district in the dangerous place and using reliably again.
5. The terminal temperature of the winding of the ballast wants low 1O ℃ more than the terminal temperature of insulating winding of ballast in the ordinary lamps and lanterns, enable life-span of winding but 30% more than improvement, improve dependability of ballast to a great extent.
6. The outer cover should reach above IP54 while protecting the grade. Higher outer cover protect grade, can make aqueous vapor and dust stock people while being difficult.
7. Climb the electric distance. The requirement for climbing the electric distance of insulating material is a grade higher than the ordinary lamps and lanterns too, in order to exclude the possibility of generating heat and puncturing with insulating material.
8. Insulating to lie between the electric intensity to test. The winding of the ballast and insulation of the chassis lie between the electric intensity and should be improved by 10% on the basis of experimental voltage that the corresponding national standard stipulates, and require that needs to carry on this test when dispatched from the factory every product. The standard has also proposed the concrete requirement to bulb and transparent minimum interval, screen panel, electric capacity while covering,etc..
Incandescent lamp bulb, high-pressure mercury vapor lamp should keep the appropriate distance with the flammable things. Should keep larger distance with the flammable thing with the cloth or paper parcel, steamed tungsten light on the bulb. It is unsuitable to use steamed tungsten light in the warehouse to preserve the flammable flammables. The wire used near steamed tungsten lamps and lanterns, glass fiber, asbestos, porcelain pearl,etc. are able to bear firing the line for being insulating should adopt products ing. In the place that may be collided with, the bulb should have a fixed glass covering or metal catch net, and hang at certain height. Under the bulb, do not deposit the combustible material, especially the important warehouse as much as possible, should be like this particularly.
Fluorescent lamp, outstanding ballast of high-pressure mercury should not be installed on the component of the flammable building.
Such as while installing incandescent lamp and ballast of bigger capacity on the flammable material, should consider the fire prevention measure of ventilating, dispelling the heat etc..
It is very important to choose enough wire sections in 36 volts and the following lighting network, because while using with the bulb of the power, the electric current passed is relatively big in the circuit, the caloric value is large too, it is apt to appear to be crossed and loaded dangerously. There should be metal pipes outside the wire, plastic sleeve pipe and band tubing are protected, should also there are obvious differences with other circuits.
Must select the waterproof lamps and lanterns for use outdoors. Exploding in the dangerous place must select the explosion-proof type lamps and lanterns for use, should also accord with the anti-blast requirement of scene.
1.Place such as rooftop at the place where the existing air blower air outlet add to connect the pipeline to guide the wind to the occupying area insensitively, then concentrate all pipeline on make pieces of large pond, pond ventilative place filter cotton, cover, can play certain noise elimination role with some.
2.Install the specialized silencer of the air blower additionally, but will reduce the air exhaust result of the air blower.
3.Change air blower, adopt large type, low axle of rotational speed flow the intersection of air blower and the intersection of thatch and air blower Luo, connect the pipeline to take on to eliminate noise.
The above-mentioned method can only improve, down at the foundation of result than before, want, solve, advise you in residential block and turn on industrial air exhaust machine these night completely, disturb citizens how it says to be no a good thing even.
Mix, flow oblique to shed effusive air blower of the air blower air blower ‘ Air blower of the tunnel Air blower induces the boiler air-introduced machine PVC air blower of the air blower the air blower of polyvinyl chloride on the roof Polypropylene air blower PP air blower Circle round three air blower the intersection of leaf and the intersection of thatch and air-blower Luo, air blower of thatch, Luo, air blower of thatch, Luo Centrifugal air blower of stainless steel air blower of plastic air blower of air blower in environment protecting mode centrifugal air blower, centrifugal the intersection of air-blower and axle flow the intersection of air blower and anti-blast axle shed air blower | Anti-blast the intersection of air blower and high-temperature the intersection of air blower and the intersection of air conditioner and the intersection of air blower and anti-blast the intersection of air blower and antiseptic air blower ‘ Air blower of glass fibre reinforced plastic The DGF -type noise of air blower of dust removal ventilates and arranges the cigarette dual-purpose cupboard type at odds with the community or the leadership wind
The base station of the apparatus controls the data transmission schemeCatalogue l The intersection of summary and l have now, withdraw l network topological traditional advantage and ample the intersection of l and bunches of the intersection of mouth and person who disappear of scheme, l of picture, time slot withdraw Fetch the base station of meddling in apparatus and control the scheme l technical requirement for solving the strong advantage l products circuit part of the topological picture l scheme of the thinking l concrete group’s network of data transmission, realize the principle solves one bunch of mouths of l E1 and restrains the server IDM-LSC/S in details l The structural frame picture l of the view l apparatus principle realizes outside the apparatus function l apparatus the principle l time slot is drawn and inserted in the apparatus IDM-8S/2S l The structural frame picture l of the view l apparatus principle realizes outside the apparatus function l apparatus that takes the time slot to propose the scheme l BTS of the function is not taken by network mode l BTS and BSC of group l of the principle The time slot collects the function, BSC have time slot collect the intersection of scheme and l BSC and BTS of function transmission network, l of scheme, of function pass one independent the intersection of E1 and the intersection of group and the intersection of chain and scheme l W of network The EB -type network management disposes the system l and moves base station and wireless base station,etc. and generally has the following characteristics: And scattering that there are many websites; It is limited to transmit resources; There are few, small in quantity power apparatus kinds of each base station; The base station apparatus is with little investment; The situation of power network is not very steady; It is more abominable too that the computer lab lives in the environment, and it is basically all that nobody is on duty to move base stations. l With swift and violent development of mobile communication, to transport, link strength to be weak transporting, it links work load to be conspicuous day by day in loud contradictioning mobile communication. But safeguard competence at present and basically still stay in the traditional way of guarding, patrolling and inspecting manually etc., and because of the characteristic of mobile network, the motive force of applying to fixed network and centralized monitoring system of the environment can’t be well applied to the mobile communication network, so combine actual conditions and resource of the existing movement base station, develop a kind of novel motive force control system, it is imperative to solve and transport and link strength weakly and transport and link the contradiction of great work load. l Existing to collect solution analysis on the basis of the time slot l Group’s network analysis l What the present base station motive force environmental monitoring data transmission system mainly adopted is to based on collecting the scheme of the time slot, collect a 64K time slot and carry on RS232 data transmission while adopting E1, the time slot not needed returns BTS to to use ‘ Or is collected an 64K idle time slot by BTS and used for transmitting RS232 data for the power of base station . RS232 time slot drew and inserted in the apparatus and drew RS232 data that E1 idle time slot transmits the power of base station. The centre carries SDH and sends E1 of No. 31 here, a time slot on every way E1 for example: The 29th time slot Bear the weight of RS232 data of the nodal power of the base station; BSC base station controller restrains RS232 data of the 29th time slot in every No. E1 on one E1, send DXC into ‘ Or PCM replies and uses the apparatus Get off several No. RS232, then pursue, amalgamate through many bunches of mouthfuls of card constantly one RS232 connect, manage server and if Fig. two convert RS232 these to Ethernet connect with through bunches of mouthfuls of server Receive and manage the server, dispose the corresponding driver, control the software of host computer, dispose the tool software etc. in managing the server, reaching the data gathers, deals with, appears in the newspaper, controls the function. l Topological picture of network
Fig. 1: The centre amalgamates into one RS232 and connects and manages the server through many bunches of cardsFig. two: The centre publishes Ethernet to connect and manage the server through the LAN through one bunch of servers l Advantage and deficiency of the traditional scheme l All the time, apply in reality more extensively such as the control data transmission solutions of Fig. 1 and Fig. two, but its advantage and insufficient and very obvious too.
In some project of transformer substation, what used observed and controlled the device and used RS485 interface bus and control room to communicate mostly inside the station. Because consider factors such as electromagnetic interfering with, electric potential difference,etc. will exert an influence on the stability of RS485 bus in the transformer substation, so with all using the optic fibre to connect while observing and controlling the devices in the control room, the apparatus uses ME-M277-M optic fibre MODEM, and connect all RS485 interface in parallel in the control room.
The products are chosen
That uses Shanghai promises and crosses ME-M277-M optic fibre modulating device in this transformer substation. Series ME-M277 are the multi-functional support asynchronous RS-232, RS-422, the optic fibre modem of RS-485 communication interface. ME-M277 connects the terminal unit RTU of remote To the host computer HOST Or distributed data collecting system SCADA The best choice of the controller, have very high performance-cost ratio. ME-M277 uses ordinary many mould optic fibres, transmitting the distance farthest exceeds 2km; The single mould optic fibre transmits the distance farthest to exceed 40km, the communication speed can reach 460Kbps.
This system selects series ME-M277 for use and adopts the optic fibre as transmitting mediums, can avoid being such as thunder and lightning, wave welling up, electromagnetic interference under the abominable environment effectively To the threat of the quality of data communication, the thunder and lightning that can be saved while using the communication of cable originally at the same time wave wells up and protects equipment investment. All person who select and design according to the intersection of industry and magnitudes of more than standard of device, can meet industrial special requirement of scene fully ‘ For instance high temperature resistant, anti-interference, wide voltage, dustproof defending static,etc. .
The system requires
In some transformer substation, the computer protector of Party A uses 100M Ethernet interface and central control room to communicate. For guaranteeing on security,it require transmission equipment for can pairs of ring, since Ethernet optic fibre exchanger that be healed, and put forward the requirement to the exchanger performance: Require for 70 ℃, heal time can’t greater than 500ms, pairs of the intersection of power and redundant mere mouthfuls of LOS and power cut out call the police while being high temperature resistant.
Network way of the group
Use one pair of rings from healing Ethernet exchanger, do an annular chain. Use a MIE- 5208M in every communication switch cupboard surrounding the exchanger as from the mode, use a MIE- 5208M as the main mode in the control room. All nodal MIE- 5208M apparatuses can connect the relay on their alarm relays of interface inside the station, and control warning device movements by relay.
Series MIE-5208 are surrounding Ethernet exchanger, adopt the latest optic fibre technology in the world, combine and employ the widest Ethernet technology at present, one collect photo-communication, Ethernet and insert the integrative comprehensive communication unit, the intersection of power matching network and automation, industrial automation, SCADA specially ‘ The data are gathered and controlled Wait for industrial the intersection of trade and the intersection of data communication and field and design.
MIE-5208 series support the automatic detection of the cycle of optic fibre and rotate surrounding Ethernet exchanger, full load makes the trouble and resumes time <300ms. MIE-5208 one pair of rings heals Ethernet by oneself only the carrying machine supports the mere mouth of 2 cycles. Various complicated optic fibre networks of can set up the chain shape, annular ing etc.. The apparatus uses one grade of components of industry to produce, it is redundant to support the power, accord with one grade of designing requirements of industry.
In the computer of this transformer substation protects the communication scheme, have used 8 industry one grade of network management type redundant Ethernet exchangers of series MIE-5208, because has adopted reliable pairs of rings to heal technology by oneself, while transmitting damaging or a certain switch cupboard of optic fibre and cutting out, will not influence other apparatuses. And while the above-mentioned situation takes place, MIE-5208 can offer the relay to call the police, enables user to understand trouble state and deal with in time, minimize the influence that users produce for communication trouble.
Employ the case partly:
Electric affair project of China Railway Bureau one group
Electric designing institute of Ningxia
Coal Zheng group transformer substation comprehensive from the system
Systematic improvement project of long-range station of transformer substation of Lianyun Harbour of Jiangsu
Transformer substation optic fibre system of power supply administration of Rui’an
Electric wire netting project communication system of mountains and rivers of Zibo of Shandong
Electric wire netting project communication system of Shandong Mount Tai village
Eight steel electric wire netting project communication systems of Xinjiang
Electric wire netting project communication system of abundant base of Yancheng of Jiangsu
Monitoring system optic fibre communication engineering of four collieries of Taiwan of group of coal industry of Da Tong
Fiber optic communication system of transformer substation of mountain of 35KV Zhoushan Qu
Factory’s base station fiber optic communication system of signal of railway of Shanghai
Tang communication system of the steel electric wire netting project
Two transformer substations of optic fibre systems of Wenzhou 110KV Jing
The door of Wenzhou 35KV mountain is turned into the optic fibre system
Present the south with respect to turn into the optic fibre system in Ningbo 220KV
Wenzhou 110KV east small island changes the optic fibre system
More cases please consult: /anli.asp
Second, brief introduction of demand:
Want XX in the communication of municipal power office and its subordinate power plant, the power office needs through having SDH transmission systemming that carry on communication now with the power plant, there are the following several respects on requirement for the communication system:
1.Collection and feedback of the real-time data: Type this employ data quantity little, but dependability expect much, need, prolong when the the relatively little one. Generally gather the apparatus for the data with RS232 interface.
3.The pronunciation communication is required: The real-time pronunciation communicates while working in power plant and power office.
4.Office automation network: The power plant is a part of electric enterprises, production management, even everyday control such as the attendance are the important links of electric business administration too. Guarantee the power plant can use Ethernet and power office to carry on communication through the existing SDH optic fibre transmission system.
The network way of third, group:
The power plant can use and can support the optic fibre communication equipment that the business of many kinds of data replies, and can carry on the factory to stand with the communication of the office end through the existing SDH transmission system. So the apparatus must meet the following conditions:
Can transmit with existing SDH
Support a bunch of mouth, pronunciation, Ethernet,etc. business of data
Guarantee the stability of communication
Can adapt to the abominable environment in the power plant
Fourth, products are chosen
The intersection of communication and products that user choose synthesis produced to promise only ME-PCM4P2E2R of carrying etc. for Shanghai. This apparatus can offer telephones of No. 4 to user, office end and user’s end mode, can insert the office end program-control exchanger directly. The Ethernet interface of No. 2, can make the computer of the power plant work the network and network of working of office end realize interconnectedly. The products employ the topological picture as follows:
Fifth, scheme advantage
Pay the transmission of many business data in SDH transmission system existing in use, while offering to user greatly conveniently, also save the unnecessary apparatus for users. Because this scheme only needs two PCMs to connect and realize, has saved the equipment cost for users on one hand, on the other hand has even because the potential trouble that the node of the apparatus cause more reduced greatly.
Comprehensive access scheme on the basis of industrial Ethernet platform Electric communication network new mode —Comprehensive access scheme on the basis of industrial Ethernet platform
l With mere communication, network swapper, successful application in IT industry of microelectric technique, the business of electric communication network is no longer initial pronunciation communication and narrowband business of transmission,etc. that the dispatching of power netwoks controls the signal in real time, but develop into and bear the weight of the dispatching of power netwoks to automize at the same time gradually, electric marketing is automized, the distribution network is automized, access of multiple operation such as the automation and office automation, video controlling and video conference, IP telephone and other data transmission of relay protection of transformer substation.