Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model is described in further detail.
The utility model utilizes former cooling line, only needs simple and easyly install pipeline and electric butterfly valve and control circuit thereof additional, realizes on-line automatic backwash cooler by opening or close corresponding butterfly valve.The feature of this design is safely, fast and efficiently, and largest benefit is " limit is rinsed, and also limit cools ".Without the need to loaded down with trivial details dismounting, both do not shut down, not waste of manpower and financial resources again.Be applicable to the cooler of the little copper pipe of various types of cooler, particularly in-line arrangement.Wherein, in operation, do not allow the cooler of dismounting particularly applicable, as empty cooler and the oil cooler of generating set, etc.
And the utility model utilizes former cooling blower, only need the simple and easy thermometer and the control circuit thereof that install band upper and lower limit electric contact additional, realized the automatic control of temperature by controlled cooling model blower fan.The feature of this design is practical and simple and easy, and largest benefit is " automatically ", and the labour intensity both having alleviated workman again saves unnecessary waste of energy.Be applicable to various types of cooling blower, the cooling blower of the thermometer carrying upper and lower limit electric contact has particularly been installed.
Fig. 1 is for exempt to unpick and wash chiller system structure chart according to the utility model.
As shown in Figure 1, of the present utility modelly exempt to unpick and wash chiller system and comprise:
The cooler 1 be connected with outlet pipe with water inlet pipe respectively, wherein the first mouth of pipe A of cooler 1 connects outlet pipe, and the second mouth of pipe B of cooler 1 connects water inlet pipe; Water inlet pipe realizes water inlet by water supply water, and outlet pipe realizes water outlet by bleed water outlet.
This system also comprises the electro connecting pressure gauge 2 be connected with water inlet pipe and the electro connecting pressure gauge 3 be connected with outlet pipe.Electro connecting pressure gauge 2 can measure the water inlet pipe hydraulic pressure drawing tie point place, and electro connecting pressure gauge 3 can measure the outlet pipe hydraulic pressure drawing tie point place.
Particularly, electro connecting pressure gauge is widely used in the industrial departments such as oil, chemical industry, metallurgy, power station, machinery or the supporting middle various fluid medium pressures measured without explosion hazard of electromechanical equipment.Usually, electro connecting pressure gauge, through supporting the use with corresponding electric device (as relay and frequency converter etc.), can realize through instrument the object automatically controlling and transmit (warning) to the various gas of tested (control) pressure and liquid medium.Electro connecting pressure gauge can help electric contact set, shell, adjusting device and terminal box (connector assembly) etc. to form by measuring system, indication mechanism, magnetic.Electro connecting pressure gauge based on the bourdon tube in measuring system under the pressure effect of measured medium, the end of bourdon tube is forced to produce the displacement of corresponding strain one, give amplification by pull bar through the transmission of gear drive, to be indicated on scale by by measured value by the instruction (together with contact) on fixed gear.Meanwhile, when it to contact the instantaneous of (dynamic circuit breaker or dynamic circuit connector) with the contact (upper limit or lower limit) on setting pointer, the circuit in control system is caused to be disconnected or connect, to reach the object automatically controlling and transmit warning.
This system also comprises:
Electric butterfly valve 2110, one end is connected with water inlet pipe, and the other end is connected with outlet pipe, and described electric butterfly valve 2110 is in closed condition;
Electric butterfly valve 2112, one end is connected with water inlet pipe, and the other end is connected with outlet pipe, and described electric butterfly valve 2112 is in closed condition;
The comparator 4 be connected with electro connecting pressure gauge 2 and electro connecting pressure gauge 3 respectively, poor with the pressure reading of electro connecting pressure gauge 3 for calculating electro connecting pressure gauge 2, when pressure reading difference between electro connecting pressure gauge 2 and electro connecting pressure gauge 3 is greater than predetermined threshold value, send triggering signal to electric butterfly valve 2110 and electric butterfly valve 2112;
Electric butterfly valve 2110 is in open mode after receiving described triggering signal, and water inlet pipe is in connected state via described electric butterfly valve 2110 with first mouth of pipe of cooler 1;
Electric butterfly valve 2112 is in open mode after receiving described triggering signal, and outlet pipe is in connected state via described electric butterfly valve 2112 with second mouth of pipe of cooler 1.
In one embodiment:
Cooler 1 can be specifically embodied as empty cooler or the oil cooler of generating set, etc.Below the instantiation of cooler 1 is enumerated in detail.It will be appreciated by those of skill in the art that this enumerating is only exemplary, in fact cooler 1 goes for the cooler of any type, is particularly useful for the cooler not allowing dismounting.
In one embodiment, the break valve 2101 be connected with outlet pipe is also comprised.By this break valve, intake tunnel can be opened or closed.
In one embodiment:
Also comprise electric butterfly valve 2102 and electric butterfly valve 2111, wherein electric butterfly valve 2102 one end is connected with water inlet pipe, and one end is connected with electric butterfly valve 2111; Electric butterfly valve 2111 is also connected with the second mouth of pipe B of cooler.
In one embodiment:
Also comprise electric butterfly valve 2103, wherein electric butterfly valve 2103 one end is connected with the first mouth of pipe A of cooler, and the other end is connected with outlet pipe.
Particularly, when cooler 1 entrance or export blocked or after being pasted with polybag, cooler entrance and exit will mineralization pressure poor.The hydraulic pressure of porch can be measured by electro connecting pressure gauge 2, the hydraulic pressure in exit can be measured by electro connecting pressure gauge 3, when difference between the hydraulic pressure and the hydraulic pressure in exit of porch reaches the threshold value preset, then assert that cooler is blocked, then can perform back flush blowdown.
When difference between the hydraulic pressure and the hydraulic pressure in exit of porch does not reach the threshold value preset, cooler 1 normally runs, and now the path of cooling water is: first mouth of pipe A-→ electric butterfly valve 2103-of the second mouth of pipe B-→-→ cooler 1 of technical water supply water-→ break valve 2101-→ electric butterfly valve 2102-→ electric butterfly valve 2111-→ cooler 1 " → drain into tail water (now electric butterfly valve 2110 and electric butterfly valve 2112 are in closed condition) ".
When difference between the hydraulic pressure and the hydraulic pressure in exit of porch reaches the threshold value preset, cooler 1 performs backwash, and now the path of cooling water is: second mouth of pipe B-→ electric butterfly valve 2112-of first mouth of pipe A-→ cooler 1 of technical water supply water-→ break valve 2101-→ electric butterfly valve 2102-→ electric butterfly valve 2110-→ cooler 1 " → drain into tail water (now electric butterfly valve 2103 and electric butterfly valve 2111 are in closed condition) ".This path illustrates that cooling water have passed through cooler equally, remain cooling effect, and cooling water flows counterflow through cooler, thus all right blowdown, especially can wash away the polybag that pipeline is piled up.
Fig. 2 starts control circuit figure according to the utility model backwash; Fig. 3 is according to the utility model backwash closing control line map.
Illustrate electric butterfly valve in fig 2 open or close the cut-away drawing of loop circuit, the electric butterfly valve 2102 wherein in accompanying drawing 1, electric butterfly valve 2103, electric butterfly valve 2110, the cut-away drawing of electric butterfly valve 2111, electric butterfly valve 2112 is identical.
In like manner, for each electric butterfly valve, outlet auxiliary relay normal opened contact 1ZJ3,3ZJ3,5ZJ3,7ZJ3 that electric butterfly valve is opened in representative are also identical with 8ZJ4 with outlet auxiliary relay normal opened contact 2ZJ4,4ZJ4,6ZJ4 of closedown electric butterfly valve.Wherein:
Auxiliary relay 1ZJ opens electric butterfly valve 2110, and its outlet normal opened contact is 1ZJ3;
Auxiliary relay 3ZJ opens electric butterfly valve 2112, and its outlet normal opened contact is 3ZJ3;
Auxiliary relay 6ZJ closes electric butterfly valve 2103, and its outlet normal opened contact is 6ZJ4;
Auxiliary relay 8ZJ closes electric butterfly valve 2111, and its outlet normal opened contact is 8ZJ4.
Time relay 1SJ plays the effect of delayed start-up electric butterfly valve 2112, and its time-delay contact is 1SJ1;
Time relay 2SJ plays the effect of time-delay closing electric butterfly valve 2103, and its time-delay contact is 2SJ1;
Time relay 3SJ plays the effect of time-delay closing electric butterfly valve 2111, and its time-delay contact is 3SJ1.
DCF2110, DCF2112, DCF2103 and DCF2111 are standard-sized sheet or the complete shut-down travel switch of its numbering butterfly valve respectively.
In fig. 3:
Auxiliary relay 7ZJ opens electric butterfly valve 2111, and its outlet normal opened contact is 1ZJ3;
Auxiliary relay 5ZJ opens electric butterfly valve 2103, and its outlet normal opened contact is 1ZJ3;
Auxiliary relay 4ZJ closes electric butterfly valve 2112, and its outlet normal opened contact is 1ZJ4;
Auxiliary relay 2ZJ closes electric butterfly valve 2110, and its outlet normal opened contact is 1ZJ4.
Time relay 4SJ plays the effect of delayed start-up electric butterfly valve 2103, and its time-delay contact is 4SJ1;
Time relay 5SJ plays the effect of time-delay closing electric butterfly valve 2112, and its time-delay contact is 5SJ1;
Time relay 6SJ plays the effect of time-delay closing electric butterfly valve 2110, and its time-delay contact is 6SJ1;
DCF2111, DCF2103, DCF2112 and DCF2110 are standard-sized sheet or the complete shut-down travel switch of its numbering butterfly valve respectively.
When cooler entrance is blocked or after being pasted with polybag, cooler entrance and exit will mineralization pressure poor.As can be seen from Figure 2, if diverter switch QK1 is allocated to " automatically " position, when pressure differential reaches a timing, this backwash design just can be started working when affecting the former cooling effect of cooler hardly automatically, first auxiliary relay 1ZJ is started and locking through the upper limit contact of entrance electro connecting pressure gauge 2 and the lower limit contact of outlet electro connecting pressure gauge 3, then successively start-up time relay 1SJ, auxiliary relay 3ZJ, time relay 2SJ, auxiliary relay 6ZJ, time relay 3SJ and auxiliary relay 8ZJ enters unlatching backwashing procedures, finally open electric butterfly valve 2110-→ delayed start-up electric butterfly valve 2112-→ time-delay closing electric butterfly valve 2103-→ time-delay closing electric butterfly valve 2111, cooler is made to be in backwash operating state.
In like manner, cooler also can be manually made to be in backwash operating state if diverter switch QK1 is allocated to " manually " position, at this no longer repeated description.In backwashing procedures carries out, each electric butterfly valve all can have standard-sized sheet or complete shut-down indicator light by its position switch DCF2110 (unlatching), DCF2112 (unlatching), DCF2103 (cut out) and DCF2111 (cut out), is convenient to remind staff to note.
When backwash indicator light is bright, indicate that cooler is in backwash operating state, and cut off whole automatic backwash startup control circuit by the normally closed auxiliary contact 9ZJ1 of auxiliary relay 9ZJ, backwash starts electric loop end-of-job automatically.
Consider and automatically control there is situation about breaking down, the utility model has also added on-the-spot " automatically, manually, stopping " diverter switch QK1 and the design such as start button AN1 or X button AN2, both can open or close corresponding electric butterfly valve by distant place crawl start button, can open or close corresponding electric butterfly valve by on-site manual again, ensureing that backwash is working properly and carry out.
This backwash design, again make use of the effect of waterpower well, back flush cooler, makes the rubbish of the porch originally blocking or be pasted onto little copper pipe, the polybag particularly pasted, just rinse thoroughly at once.During backwash, the path of cooling water is: second mouth of pipe B-→ electric butterfly valve 2112-of first mouth of pipe A-→ cooler 1 of technical water supply water-→ break valve 2101-→ electric butterfly valve 2102-→ electric butterfly valve 2110-→ cooler 1 " → drain into tail water (now electric butterfly valve 2103 and electric butterfly valve 2111 are in closed condition) ".This path illustrates that cooling water equally have passed through cooler, remains cooling effect.
From backwash closing control line map, when thinking that cooler manually exits backwash state, only diverter switch QK2 need be allocated to " manually " position, direct startup auxiliary relay 7ZJ, then successively start-up time relay 4SJ, auxiliary relay 5ZJ, time relay 5SJ, auxiliary relay 4ZJ, time relay 6SJ and auxiliary relay 2ZJ enters cooler and normally runs working procedure, finally open electric butterfly valve 2111-→ delayed start-up electric butterfly valve 2103-→ time-delay closing electric butterfly valve 2112-→ time-delay closing electric butterfly valve 2110, cooler is in and normally runs operating state.Turn to normal operation operating state program at cooler from backwash, each electric butterfly valve all can have standard-sized sheet or complete shut-down indicator light by its position switch DCF2111 (unlatching), DCF2103 (unlatching), DCF2112 (cut out) and DCF2110 (cut out), is convenient to remind staff to note.When cooler normally run relay indicating light bright time, cut off whole automatic backwash closing control circuit by the normally closed auxiliary contact 10ZJ1 of auxiliary relay 10ZJ.
In like manner, consider that control circuit has situation about breaking down, this design has yet added designs such as on-the-spot " automatically, manually, stopping " diverter switch QK2 and start button AN1 or X button AN2 (sharing with unlatching control circuit), both can open or close corresponding electric butterfly valve by distant place crawl start button, can open or close corresponding electric butterfly valve by on-site manual again, ensureing that backwash is closed and normally carry out.As can be seen from Figure 1, when cooler normally runs, the path of cooling water is: first mouth of pipe A-→ electric butterfly valve 2103-of the second mouth of pipe B-→-→ cooler 1 of technical water supply water-→ break valve 2101-→ electric butterfly valve 2102-→ electric butterfly valve 2111-→ cooler 1 " → drain into tail water (now electric butterfly valve 2110 and electric butterfly valve 2112 are in closed condition) ".
Make a general survey of backwash start control circuit figure and backwash closing control line map known, each electric butterfly valve has two auxiliary relays to control to open or cut out respectively, and two auxiliary relay lockings mutually in electric control circuit, avoid unlatching or closing motion to carry out simultaneously, make control circuit safely, reliably.As electric butterfly valve 2110 is just controlled and mutual locking by auxiliary relay 1ZJ and 2ZJ.
Fig. 4 is the Control system architecture figure according to the utility model transformer cooling fan.
As shown in Figure 4, this control system comprises transformer cooling fan (M), auxiliary relay (ZJ), A.C. contactor (KM), thermal relay (not shown) and thermometer (not shown);
Three main contacts (KM3) of A.C. contactor (KM) are connected with three main contacts (RJ2) of thermal relay respectively, and three main contact RJ2 of thermal relay are connected respectively to the three-phase windings of transformer cooling fan (M);
The common junction of thermometer is connected with upper limit electric contact (WJ1), upper limit electric contact (WJ1) is connected with the auxiliary normally closed contact (ZJ1) of auxiliary relay (ZJ), the auxiliary normally closed contact (ZJ1) of auxiliary relay (ZJ) is also connected with A.C. contactor (KM), A.C. contactor (KM) is connected with the auxiliary contact (RJ1) of thermal relay, and wherein the auxiliary normal opened contact (KM1) of A.C. contactor (KM) is connected across between the common junction of thermometer and upper limit electric contact (WJ1) and realizes electric blocking; The common junction of thermometer is connected with lower limit electric contact (WJ2), lower limit electric contact (WJ2) is connected with the auxiliary normal opened contact (KM2) of A.C. contactor (KM), and the auxiliary normal opened contact (KM2) of A.C. contactor (KM) is connected with auxiliary relay coil (ZJ).
Preferably, the auxiliary contact (RJ1) of described thermal relay is connected to fuse.
Preferably, described auxiliary relay coil (ZJ) is connected to described fuse.
As seen from Figure 4, when diverter switch QK is allocated to " automatically " position, if when temperature rises to set point, the upper limit electric contact of thermometer is connected, and this control circuit is just started working automatically.First, common junction through thermometer connects upper limit electric contact (WJ1), then the auxiliary contact (ZJ1) of intermediate relay ZJ is connected, ac contactor coil (KM) is made to obtain electric and start, finally in closed main line three be connected to the main contact KM3 of the A.C. contactor of cooling blower (M), wherein also realize electric blocking through the auxiliary contact KM1 of A.C. contactor, make cooling blower (M) enter operating state of automatically lowering the temperature, thus be the transformer cooling in hydroelectric station.
In like manner, cooling blower also can be manually made to be in cooling operating state if diverter switch QK is allocated to " manually " position, at this no longer repeated description.
After when cooling blower (M), a period of time has been carried out in cooling work automatically, temperature will decline.If the lower limit electric contact dropping to thermometer is connected, this control circuit can make again cooling blower deactivate state automatically.First, through the common junction of thermometer to lower limit electric contact (WJ2), then control power supply is switched to the auxiliary contact (KM2) of A.C. contactor KM, auxiliary relay coil (ZJ) is made to obtain electric and start, the auxiliary contact (ZJ1) of auxiliary relay disconnects and starts circuit simultaneously, three main contact KM3 being connected to the A.C. contactor of cooling blower (M) in main line are finally made to disconnect, realize the running stopping cooling blower (M), to deactivate state, and enter the preparation of new round cooling work.
Visible, the working practice of the utility model combine with technique, based on the cooling blower of hydroelectric station transformer design, configuration application and function, by the practical application in line service, be achieved the practicality to cooling blower, easy control automatically, thus reach higher automation application technology.
In sum, the utility model comprises transformer cooling fan (M), auxiliary relay (ZJ), A.C. contactor (KM), thermal relay and thermometer; Three main contacts (KM3) of A.C. contactor (KM) are connected with three main contacts (RJ2) of thermal relay respectively, and three main contacts (RJ2) of thermal relay are connected respectively to the three-phase windings of transformer cooling fan (M); The common junction of thermometer is connected with upper limit electric contact (WJ1), upper limit electric contact (WJ1) is connected with the auxiliary normally closed contact (ZJ1) of auxiliary relay (ZJ), the auxiliary normally closed contact (ZJ1) of auxiliary relay (ZJ) is also connected with A.C. contactor (KM), A.C. contactor (KM) is connected with the auxiliary contact (RJ1) of thermal relay, and wherein the auxiliary normal opened contact (KM1) of A.C. contactor (KM) is connected across between the common junction of thermometer and upper limit electric contact (WJ1) and realizes electric blocking; The common junction of thermometer is connected with lower limit electric contact (WJ2), lower limit electric contact (WJ2) is connected with the auxiliary normal opened contact (KM2) of A.C. contactor (KM), and the auxiliary normal opened contact (KM2) of A.C. contactor (KM) is connected with auxiliary relay coil (ZJ).
As can be seen here, the utility model utilizes former cooling blower, only needs the simple and easy thermometer and the control circuit thereof that install band upper and lower limit electric contact additional, is realized the automatic control of temperature by controlled cooling model blower fan.The feature of this design is practical and simple and easy, and largest benefit is " automatically ", and the labour intensity both having alleviated workman again saves unnecessary waste of energy.Be applicable to various types of cooling blower, the cooling blower of the thermometer carrying upper and lower limit electric contact has particularly been installed.
The above, be only preferred embodiment of the present utility model, is not intended to limit protection range of the present utility model.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.