CN107843004A - Gas fired-boiler temperature-constant operation method - Google Patents
Gas fired-boiler temperature-constant operation method Download PDFInfo
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- CN107843004A CN107843004A CN201710942994.2A CN201710942994A CN107843004A CN 107843004 A CN107843004 A CN 107843004A CN 201710942994 A CN201710942994 A CN 201710942994A CN 107843004 A CN107843004 A CN 107843004A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/48—Water heaters for central heating incorporating heaters for domestic water
- F24H1/50—Water heaters for central heating incorporating heaters for domestic water incorporating domestic water tanks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a kind of gas fired-boiler temperature-constant operation method, carry out according to the following steps：Process is up first, opens each shunt valve, back-water valve (BWV), the first gas valve, closes the second gas valve and regulating valve, combustion gas supply gas fired-boiler after the first gas valve and the first combustion gas branch pipe and combustion gas inlet pipe；Start gas fired-boiler and circulating pump, the hot water formed after heating uses heat unit into water main's supply is each；Backwater enters gas fired-boiler through circulating pump and return main, forms a complete waterway circulating；When the temperature monitor and control mechanism malfunction of gas fired-boiler, the second gas valve is opened immediately, closes the first gas valve, and combustion gas supplies gas fired-boiler by gas fired-boiler heat water temperature-constant valve；The open degree of valve is controlled to adjust so as to controlling the leaving water temperature of gas fired-boiler.Operating personnel need not carry out special training, and thermostatic control can be achieved by the operation of controlled valve.By controlling to adjust the open degree of valve, the leaving water temperature of gas fired-boiler setting can be controlled.
Description
Technical field
The present invention relates to gas fired-boiler heat supply process field, more particularly to a kind of gas fired-boiler temperature-constant operation method.
Background technology
With the development of economy and society, the living standard of the people increasingly improves, the Northeast realizes central heating substantially
All standing, but it is regional in Central China, and winter temperature is relatively low, while central heating coverage rate is also smaller, and many cells do not connect
Enter Thermal Corp.Therefore, it is provided with heating system certainly in Central China area, many cells.Coal-burning boiler pollution is big, by by
Step is eliminated；Gas fired-boiler is with combustion gas（Such as natural gas, liquefied petroleum gas）For fuel, water is heated by burner, realizes and supplies
Warm to provide life, bathing hot water, heating is fast, low noise, free from dust, is a kind of economical pot for being especially suitable for China's actual conditions
Stove kind, thus increasingly extensive application has been obtained, more and more to provide heating hot water with heat unit.
Intelligent fuel gas boiler automatic degree is high, passes through temperature sensor and electric control gear（Microcomputer controller）And combustion
Burner monitors and controls leaving water temperature.This intelligent fuel gas boiler cost is higher, and mechanism is complicated, during later stage use, one
Any link in the complicated temperature monitor and control mechanism of denier is out of joint, it is impossible to controls leaving water temperature well, especially
Maintenance process needs the long period, and maintenance process is given to be affected greatly with the just conventional heat of heat unit.Certainly, intelligent fuel gas
Boiler attendance cost is also higher.At present, lack it is a kind of can be extensive rapidly in the temperature monitor and control mechanism-trouble of gas fired-boiler
The method of multiple temperature-constant operation.
The content of the invention
Recover permanent rapidly in the temperature monitor and control mechanism-trouble of gas fired-boiler it is an object of the invention to provide a kind of
The gas fired-boiler temperature-constant operation method of temperature operation.
To achieve the above object, gas fired-boiler temperature-constant operation method of the invention is entered using intumescent constant-temperature hot water system
OK, intumescent constant-temperature hot water system includes gas fired-boiler, water main and return main, and the water inlet and backwater of gas fired-boiler are total
Pipe is connected, and the delivery port of gas fired-boiler is connected with water main；The return main is connected with expansion tank, swelling water
Case is connected with filling pipe, and filling pipe is connected with small pump, and small pump is connected with water supply tank, and water supply tank is connected with water softener, soft water
Device connects municipal tap water pipe network；The return main of gas fired-boiler entrance is provided with circulating pump；
One end that water main is connected with gas fired-boiler is its initiating terminal, and the end of water main is connected with diversion box, divides water
Case is connected with some water supply branch pipes, and shunt valve is respectively equipped with each water supply branch pipe, heat unit is used at each water supply branch pipe connection one
Hot water inlet pipe, expansion tank is located at the top of highest heat unit；
One end that return main is connected with gas fired-boiler is its initiating terminal, and the end of return main is connected with header tank；Catchment
Case is connected with some return branch, and back-water valve (BWV) is respectively equipped with each return branch, heat unit is used at each return branch connection one
Hot water outlet pipe；
Gas fired-boiler is connected with combustion gas inlet pipe, and the first combustion gas branch pipe and the second combustion gas branch pipe are connected in parallel on combustion gas inlet pipe, the
One combustion gas branch pipe is provided with the first gas valve, is connected on the second combustion gas branch pipe and is provided with the second gas valve and gas fired-boiler hot water constant temperature
Valve；Hot water barrel is connected in series with the water main in gas fired-boiler exit, the internal diameter of hot water barrel is more than the internal diameter of water main；
Gas fired-boiler heat water temperature-constant valve includes valve body, and vertically arranged inner chamber is provided with valve body, and the horizontal cross-section of inner chamber is rounded,
Intracavity sidewall slidably connects valve element, and valve element includes jacking block, sole piece and the connecting pole being connected between jacking block and sole piece, jacking block and
Sole piece is slidingly sealed cooperation with intracavity sidewall respectively；Jacking block, sole piece, connecting pole and the side wall of inner chamber surround toroidal cavity；One
Venthole is provided with side valve body, venthole is inner to be connected with escape pipe, venthole phase with the intracavity inter-connection of valve body and its outer end
Air admission hole, the inner of air admission hole and the intracavity inter-connection of valve body are provided with the valve body of offside, the outer end of air admission hole is connected with air inlet
Pipe；
Stage clip is connected between the top of jacking block and the inner chamber roof of valve body；Sole piece is crimped with downwards push rod, push rod upper diameter
More than lower diameter, push rod top is through valve body and stretches into the inner chamber of valve body, and push rod top coordinates with valve body slides sealing, push rod
Top and sole piece press fit；Fixed seat is provided with below valve body, is provided with vertical through holes in fixed seat, push rod bottom extends downwardly into perpendicular
Cooperation is slidingly sealed to through hole and with the hole wall of vertical through holes；The lower ending opening of vertical through holes is connected with expansion tube, and expansion tube connects
Temperature-sensitive case is connected to, inflation fluid is filled in temperature-sensitive case；Temperature-sensitive case is installed in hot water barrel；
Valve element has upper extreme position and lower limit position, venthole when valve element is between upper extreme position and lower limit position
All the time it is connected with toroidal cavity；Air admission hole is isolated with toroidal cavity when valve element is located at upper extreme position, and valve element is located at lower pole
It is the initial position of valve element during extreme position, air admission hole and toroidal cavity are fully switched on when valve element is located at initial position；Valve element has
Equilbrium position, the equilbrium position of valve element is between upper extreme position and lower limit position, annular when valve element is located at equilbrium position
The top of cavity is less than the top of air admission hole higher than the bottom of air admission hole top and toroidal cavity, toroidal cavity and air inlet position in
Partially communicating state；The height of toroidal cavity is equal to the height of air admission hole；Gas fired-boiler heat water temperature-constant valve passes through its escape pipe
It is connected in series in air inlet pipe on the second combustion gas branch pipe；
Gas fired-boiler temperature-constant operation method is carried out according to the following steps successively：
Process is up first, opens each shunt valve, back-water valve (BWV), the first gas valve, closes the second gas valve and regulating valve,
Combustion gas supplies gas fired-boiler after the first gas valve and the first combustion gas branch pipe and combustion gas inlet pipe；Start gas fired-boiler and circulation
Pump, recirculated water are heated in gas fired-boiler, and the hot water formed after heating enters water main；At the same time backwater passes through each
With entering return main after the hot water outlet pipe of heat unit, each return branch and header tank；When hot water passes through plate type heat exchanger with
Backwater is exchanged heat, and will be controlled within a predetermined range for the temperature difference of backwater while backwater obtains preheating；Hot water is changed by board-like
Enter diversion box through water main after hot device, supplied after each water supply branch pipe and each hot water inlet pipe with heat unit each single with heat
Position；Backwater enters gas fired-boiler after plate type heat exchanger through circulating pump and return main, forms a complete waterway circulating；
There is stable pressure in expansion tank guarantee system, after water level reduces in expansion tank, start water softener and small pump, to
Supplement water is until topped up with water in expansion tank in expansion tank；
When the temperature monitor and control mechanism malfunction of gas fired-boiler, the second gas valve is opened immediately, closes the first gas valve,
Combustion gas supplies gas fired-boiler by gas fired-boiler heat water temperature-constant valve, and holding system continues to run with；
The deadweight of the downward pressure on top surface of spring and valve element forms lower pressure to valve element, and the upward pressure on top surface of inflation fluid forms pressure
Power, during normal work, valve element is located at its equilbrium position, and now upper pressure and lower pressure reach poised state；
When gas fired-boiler leaving water temperature exceedes normal range (NR), the upper pressure increase after becoming big of the inflation fluid volume in temperature-sensitive case, push away
Dynamic push rod and the upward out equilbrium position of valve element, so as to reduce the connection area of toroidal cavity and air admission hole, reduce gas fired-boiler
Air inflow；Gas fired-boiler leaving water temperature is higher, and inflation fluid dilatation is bigger, and the leaving water temperature of gas fired-boiler exceedes setting
During ceiling temperature, valve element reaches its upper extreme position, and air admission hole is isolated with toroidal cavity, so as to stop to supply to gas fired-boiler
Combustion gas；After the air inflow of gas fired-boiler reduces or interrupted, the leaving water temperature of gas fired-boiler gradually reduces, the expansion in temperature-sensitive case
After liquid product diminishes, under the elastic force effect of stage clip, valve element moves down, until valve element reaches its equilbrium position；
When gas fired-boiler leaving water temperature is less than normal range (NR), the inflation fluid volume in temperature-sensitive case goes up pressure after diminishing and diminished,
Under the elastic force effect of stage clip, valve element is downward away from equilbrium position, so as to expand the connection area of toroidal cavity and air admission hole, increase
The air inflow of gas fired-boiler, when the leaving water temperature of gas fired-boiler is less than the lower limit temperature set, valve element reaches its lower limit position,
The connection area of air admission hole and toroidal cavity reaches maximum；After the air inflow increase of gas fired-boiler, the leaving water temperature of gas fired-boiler
Gradually rise, after the inflation fluid volume in temperature-sensitive case becomes big, under the elastic force effect of stage clip, valve element moves up, until valve element
Reach its equilbrium position；Valve element is stable at equilbrium position, and gas fired-boiler leaving water temperature is maintained at predetermined leaving water temperature.
The temperature-sensitive case is connected with regulation pipe, and regulation pipe is connected with regulating box, and regulation pipe is provided with regulating valve；Need to heighten
During the predetermined leaving water temperature of gas fired-boiler, regulating valve is opened；
The open degree of regulating valve is bigger, and the inflation fluid into regulating box is more, enters under identical gas fired-boiler leaving water temperature
The inflation fluid of vertical through holes is fewer in fixed seat, and inflation fluid is to upper pressure is with regard to smaller caused by push rod, the balance position of corresponding valve element
Put lower；Therefore, the open degree of regulating valve is bigger, the connection area of toroidal cavity and air admission hole when valve element is located at equilbrium position
Also bigger, the quantity of heat production of corresponding gas fired-boiler and the leaving water temperature of gas fired-boiler are higher；
The open degree of valve is controlled to adjust so as to controlling the leaving water temperature of gas fired-boiler, it is necessary to improve the leaving water temperature of gas fired-boiler
When, tune up the open degree of regulating valve；When needing to reduce the leaving water temperature of gas fired-boiler, the open degree of regulating valve is turned down.
Intracavity sidewall at the upper extreme position of valve element is provided with upper locating ring, the intracavity sidewall at the lower limit position of valve element
Provided with lower locating ring.
The inflation fluid is mercury or ethanol.
The fixed seat upper surface is provided with upper sealing ring around the push rod, and the fixed seat lower surface is around the expansion
Pipe is provided with lower seal.
The control process of the present invention is simple and convenient, and operating personnel need not carry out special training, pass through simple controlled valve
Operation thermostatic control to gas fired-boiler leaving water temperature can be achieved.
By controlling to adjust the open degree of valve, the high and low position of valve element equilbrium position can be easily controlled, and then control
Leaving water temperature under gas fired-boiler stable state（The leaving water temperature set）.
In the temperature monitor and control mechanism-trouble of gas fired-boiler, it is only necessary to close the first gas valve and open the second combustion gas
Valve, you can make gas fired-boiler heat water temperature-constant valve play a role, boiler quantity of heat production is adjusted by the air inflow of regulating gas boiler
Size, and then realize thermostatic control, the leaving water temperature of gas fired-boiler controlled within preset range.Compare and shut down dimension in the past
Shield（Need 1-3 days）Mode, the influence to user is fallen below minimum.
In heating season, producer's attendant's workload is larger, and fittings cost and all more non-heating season of labour cost are high.
Using the structure of the present invention, downtime not only can be shortened, and the maintenance time of gas fired-boiler can be adjusted to non-confession
Warm season section, so as to save maintenance cost.
The gas fired-boiler heat water temperature-constant valve of the present invention can utilize inflation fluid to vary with temperature the characteristic that Volume Changes occur,
With reference to the elastic force of spring, valve element is moved down when gas fired-boiler leaving water temperature is higher, increase air inflow so as to improve gas fired-boiler
Quantity of heat production, improve leaving water temperature；Valve element is moved up when gas fired-boiler leaving water temperature is relatively low, reduces air inflow so as to reduce combustion
The quantity of heat production of gas boiler, reduce leaving water temperature.
Gas fired-boiler heat water temperature-constant valve need not be realized using electric-control system, without setting temperature sensor and by automatically controlled dress
Put water temperature compared with setting value and judge, pure mechanic structure compares that electric control structure is simpler, is more not easy
Break down, greatly reduce cost of equipment maintenance, and the energy in the temperature monitor and control mechanism malfunction of gas fired-boiler
It is enough to play a role rapidly.
Expansion tank is located at the top with heat unit, and ensure that has stable and enough hydraulic pressure in system, avoid sky
Gas largely enters circulation.
Differential-pressure bypass valve can balance the pressure difference between confession/backwater, can improve the utilization rate of system, keep the accurate of pressure difference
Mutual definite value, the noise of system can be reduced, avoid that equipment is caused to damage for pressure difference is excessive between/backwater.Staff can be with
Open degree is adjusted according to heat unit thermic load situation, also be can guarantee that with heat unit load very little or when being zero in gas fired-boiler
A certain amount of water is by protecting gas fired-boiler to also play energy-saving effect.
Plate type heat exchanger can reach the purpose of energy-conservation by the temperature difference control for backwater within a predetermined range.Flow equilibrium
Valve directly can set flow according to design, and valve can eliminate residual head and the pressure oscillation of pipeline automatically in the presence of water
Caused flow deviation, no matter how system pressure, which changes, can keep setting flow constant.This causes pipe network Flow-rate adjustment
Once complete, tune net work is changed into simple assignment of traffic, efficiently solves the hydraulic equilibrium imbalance of pipe network.
Brief description of the drawings
Fig. 1 is the structural representation of intumescent constant-temperature hot water system in the present invention；
Fig. 2 is the structural representation of gas fired-boiler heat water temperature-constant valve when valve element is located at equilbrium position；
Fig. 3 is the structural representation of gas fired-boiler heat water temperature-constant valve when valve element is located at lower limit position；
Fig. 4 is the structural representation of gas fired-boiler heat water temperature-constant valve when valve element is located at upper extreme position.
Embodiment
The invention discloses a kind of gas fired-boiler temperature-constant operation method, this method is entered using intumescent constant-temperature hot water system
OK.As shown in Figures 1 to 4, intumescent constant-temperature hot water system includes gas fired-boiler 1, water main 2 and return main 3, gas-fired boiler
The water inlet of stove 1 is connected with return main 3, and the delivery port of gas fired-boiler 1 is connected with water main 2；The return main 3
Expansion tank 4 is connected with, expansion tank 4 is connected with filling pipe 5, and filling pipe 5 is connected with small pump 6, and small pump 6 is connected with benefit
Water tank 7, water supply tank 7 are connected with water softener 8, and water softener 8 connects municipal tap water pipe network；The backwater of the entrance of gas fired-boiler 1 is total
Pipe 3 is provided with circulating pump 9；
One end that water main 2 is connected with gas fired-boiler 1 is its initiating terminal, and the end of water main 2 is connected with diversion box 10,
Diversion box 10 is connected with some water supply branch pipes 11, and shunt valve 12 is respectively equipped with each water supply branch pipe 11, and each water supply branch pipe 11 connects
Connect and be located at the top of highest heat unit with the hot water inlet pipe of heat unit, expansion tank 4 at one；
One end that return main 3 is connected with gas fired-boiler 1 is its initiating terminal, and the end of return main 3 is connected with header tank 13；
Header tank 13 is connected with some return branch 14, and back-water valve (BWV) 15 is respectively equipped with each return branch 14, and each return branch 14 connects
Connect at one with the hot water outlet pipe of heat unit；It is routine techniques with heat unit and its hot water inlet pipe and hot water outlet pipe, figure
Do not show.
Gas fired-boiler 1 is connected with combustion gas inlet pipe 16, and the first combustion gas branch pipe 17 and second is connected in parallel on combustion gas inlet pipe 16
Combustion gas branch pipe 18, the first combustion gas branch pipe 17 are provided with the first gas valve 19, are connected on the second combustion gas branch pipe 18 and be provided with the second combustion gas
Valve 20 and gas fired-boiler heat water temperature-constant valve 21；Hot water barrel 22 is connected in series with the water main 2 in the exit of gas fired-boiler 1, heat
The internal diameter of water drum 22 is more than the internal diameter of water main 2；
Gas fired-boiler heat water temperature-constant valve 21 includes valve body 23, and vertically arranged inner chamber 24, the level of inner chamber 24 are provided with valve body 23
Section is rounded, and the side walls of inner chamber 24 are connected with valve element, and valve element includes jacking block 25, sole piece 26 and is connected to jacking block 25 and sole piece
Connecting pole 27 between 26, jacking block 25 and sole piece 26 seal with the side walls of inner chamber 24 respectively to be coordinated；Jacking block 25, sole piece 26, connect
The side wall for connecing post 27 and inner chamber 24 surrounds toroidal cavity 28；Be provided with venthole 29 in side valve body 23, venthole 29 it is inner and
The inner chamber 24 of valve body 23 is connected and its outer end is connected with escape pipe 30, and air admission hole is provided with the valve body 23 of the opposite side of venthole 29
31, the inner of air admission hole 31 is connected with the inner chamber 24 of valve body 23, and the outer end of air admission hole 31 is connected with air inlet pipe 32；
Stage clip 33 is connected between the top of jacking block 25 and the roof of inner chamber 24 of valve body 23；Sole piece 26 is crimped with downwards push rod 34,
The upper diameter of push rod 34 is more than lower diameter, and the top of push rod 34 is through valve body 23 and stretches into the inner chamber 24 of valve body 23, on push rod 34
Portion is slidingly sealed cooperation, the top of push rod 34 and the press fit of sole piece 26 with valve body 23；The lower section of valve body 23 is provided with fixed seat 35, fixed
Vertical through holes are provided with seat 35, the bottom of push rod 34 extends downwardly into vertical through holes and is slidingly sealed cooperation with the hole wall of vertical through holes；
The lower ending opening of vertical through holes is connected with expansion tube 36, and expansion tube 36 is connected with temperature-sensitive case 37, inflation fluid is filled in temperature-sensitive case 37
38；Temperature-sensitive case 37 is installed in hot water barrel 22；During work inflation fluid 38 is full of in expansion tube 36 and vertical through holes.
Valve element has upper extreme position and lower limit position, goes out when valve element is between upper extreme position and lower limit position
Stomata 29 is connected with toroidal cavity 28 all the time；Air admission hole 31 is isolated with toroidal cavity 28 when valve element is located at upper extreme position,
It is the initial position of valve element when valve element is located at lower limit position, air admission hole 31 and toroidal cavity 28 are complete when valve element is located at initial position
It is complete to connect；Valve element has equilbrium position, and between upper extreme position and lower limit position, valve element is located at for the equilbrium position of valve element
The top of toroidal cavity 28 is less than the top of air admission hole 31 higher than the top of air admission hole 31 and the bottom of toroidal cavity 28 during equilbrium position
End, toroidal cavity 28 are in partially communicating state with air admission hole 31；The height of toroidal cavity 28 is equal to the height of air admission hole 31；
Gas fired-boiler heat water temperature-constant valve 21 is connected in series on the second combustion gas branch pipe 18 by its escape pipe 30 and air inlet pipe 32.
The gas fired-boiler 1 is in parallel between water main 2 and return main 3 to be provided with more than two sets；So as to increase system
Heat capacity, increase heat supply service area.
The circulating pump 9 is in parallel to be provided with more than two sets；So as to increase water supply flow, and improve to higher floor stable water supply
Ability.
Intumescent constant-temperature hot water system also includes plate type heat exchanger 42, and plate type heat exchanger 42 includes the first import 43, the
Two imports 44, first outlet 45 and second outlet 46, first import 43 and first outlet 45 are connected in series in water main 2
On, second import 44 and second outlet 46 are connected in series on return main 3；Pipeline at first outlet 45 is provided with stream
Measure balanced valve 47.
Plate type heat exchanger 42 can reach the purpose of energy-conservation by the temperature difference control for backwater within a predetermined range.Flow is put down
Weighing apparatus valve 47 directly can set flow according to design, and valve can eliminate the residual head and pressure of pipeline automatically in the presence of water
The caused flow deviation of fluctuation, no matter how system pressure, which changes, can keep setting flow constant.This causes pipe network flow
Regulation is once completed, and tune net work is changed into simple assignment of traffic, efficiently solves the hydraulic equilibrium imbalance of pipe network.
The plate type heat exchanger 42 is in parallel to be provided with more than two sets, so as to increase exchange capability of heat, reduces the temperature difference for backwater.
The bottom of diversion box 10 and the bottom of header tank 13 are connected to discharging valve 48.
Bypass pipe 49 is connected between the diversion box 10 and header tank 13, bypass pipe 49 is provided with differential-pressure bypass valve 50.
Differential-pressure bypass valve 50 can balance the pressure difference between confession/backwater, can improve the utilization rate of system, keep the accurate mutually fixed of pressure difference
Value, the noise of system can be reduced, avoid that equipment is caused to damage for pressure difference is excessive between/backwater.Staff can basis
Open degree is adjusted with heat unit thermic load situation, also can guarantee that one in gas fired-boiler 1 with heat unit load very little or when being zero
Quantitative water is by protecting gas fired-boiler 1 to also play energy-saving effect.
The side wall of inner chamber 24 at the upper extreme position of valve element is provided with upper locating ring 51, the inner chamber at the lower limit position of valve element
24 side walls are provided with lower locating ring 52.Upper locating ring 51 and lower locating ring 52 can limit upper extreme position and the limit inferior position of valve element
Put.
The temperature-sensitive case 37 is connected with regulation pipe 39, and regulation pipe 39 is connected with regulating box 40, and regulation pipe 39 is provided with regulation
Valve 41.
The inflation fluid 38 is mercury or ethanol.Mercury and ethanol have the larger coefficient of expansion, with its body of the change of temperature
Product changes greatly, and so as to produce the change of pressure, valve element is had relatively large stroke.
The upper surface of fixed seat 35 is provided with upper sealing ring 53 around the push rod 34, and the lower surface of fixed seat 35 is surround
The expansion tube 36 is provided with lower seal 54.So as to strengthen the sealing property of the position at two.
The gas fired-boiler temperature-constant operation method of the present invention is carried out according to the following steps successively：
Process is up first, opens each shunt valve 12, back-water valve (BWV) 15, the first gas valve 19, closes the second gas valve 20
With regulating valve 41, combustion gas supplies gas fired-boiler 1 after the first gas valve 19 and the first combustion gas branch pipe 17 and combustion gas inlet pipe 16；Open
Dynamic gas fired-boiler 1 and circulating pump 9, recirculated water are heated in gas fired-boiler 1, and the hot water formed after heating enters water main
2；At the same time backwater by each with entering return main after the hot water outlet pipe of heat unit, each return branch 14 and header tank 13
3；Exchanged heat with backwater when hot water passes through plate type heat exchanger 42, the temperature difference control for backwater is existed while backwater obtains preheating
In preset range；Hot water through water main 2 after plate type heat exchanger 42 by entering diversion box 10, through each water supply branch pipe 11 and each use
Supplied after the hot water inlet pipe of heat unit and each use heat unit；Backwater is after plate type heat exchanger 42 through circulating pump 9 and return main 3
Into gas fired-boiler 1, a complete waterway circulating is formed；There is stable pressure in the guarantee system of expansion tank 4, work as expansion
After water level reduces in water tank 4, start water softener 8 and small pump 6, water is supplemented into expansion tank 4 and is filled it up with until in expansion tank 4
Water；
When the temperature monitor and control mechanism malfunction of gas fired-boiler 1, the second gas valve 20 is opened immediately, closes the first combustion gas
Valve 19, combustion gas supply gas fired-boiler 1 by gas fired-boiler heat water temperature-constant valve 21, and holding system continues to run with；
The deadweight of the downward pressure on top surface of spring and valve element forms lower pressure to valve element, and the upward pressure on top surface of inflation fluid 38 is formed
Pressure, during normal work, valve element is located at its equilbrium position, and now upper pressure and lower pressure reach poised state；
When the leaving water temperature of gas fired-boiler 1 exceedes normal range (NR), the upper pressure increasing after becoming big of the volume of inflation fluid 38 in temperature-sensitive case 37
Greatly, push rod 34 and the upward out equilbrium position of valve element are promoted, so as to reduce the connection area of toroidal cavity 28 and air admission hole 31, is subtracted
The air inflow of small gas fired-boiler 1；The leaving water temperature of gas fired-boiler 1 is higher, and the dilatation of inflation fluid 38 is bigger, and gas fired-boiler 1 goes out
When coolant-temperature gage exceedes the ceiling temperature of setting, valve element reaches its upper extreme position, and air admission hole 31 is isolated with toroidal cavity 28, from
And stop to supply combustion gas to gas fired-boiler 1；After the air inflow of gas fired-boiler 1 reduces or interrupted, the leaving water temperature of gas fired-boiler 1
Gradually reduce, after the volume of inflation fluid 38 in temperature-sensitive case 37 diminishes, under the elastic force effect of stage clip 33, valve element moves down, directly
Its equilbrium position is reached to valve element；
When the leaving water temperature of gas fired-boiler 1 is less than normal range (NR), the upper pressure change after diminishing of the volume of inflation fluid 38 in temperature-sensitive case 37
Small, under the elastic force effect of stage clip 33, valve element is downward away from equilbrium position, so as to expand the company of toroidal cavity 28 and air admission hole 31
Logical area, increase the air inflow of gas fired-boiler 1, when the leaving water temperature of gas fired-boiler 1 is less than the lower limit temperature set, valve element reaches
The connection area of its lower limit position, air admission hole 31 and toroidal cavity 28 reaches maximum；After the air inflow increase of gas fired-boiler 1,
The leaving water temperature of gas fired-boiler 1 gradually rises, and after the volume of inflation fluid 38 in temperature-sensitive case 37 becomes big, is acted in the elastic force of stage clip 33
Under, valve element moves up, until valve element reaches its equilbrium position；Valve element is stable at equilbrium position, the leaving water temperature of gas fired-boiler 1
It is maintained at predetermined leaving water temperature.
When needing to heighten the predetermined leaving water temperature of gas fired-boiler 1, regulating valve 41 is opened；
The open degree of regulating valve 41 is bigger, into the inflation fluid more than 38 of regulating box 40, in the leaving water temperature of identical gas fired-boiler 1
The lower inflation fluid 38 into vertical through holes in fixed seat 35 is fewer, and inflation fluid 38 is to upper pressure is with regard to smaller caused by push rod 34, phase
Answer the equilbrium position of valve element lower；Therefore, the open degree of regulating valve 41 is bigger, toroidal cavity 28 when valve element is located at equilbrium position
Also bigger with the connection area of air admission hole 31, the quantity of heat production of corresponding gas fired-boiler 1 and the leaving water temperature of gas fired-boiler 1 are got over
It is high；
The open degree of valve 41 is controlled to adjust so as to control the leaving water temperature of gas fired-boiler 1, it is necessary to which that improves gas fired-boiler 1 goes out water temperature
When spending, the open degree of regulating valve 41 is tuned up；When needing to reduce the leaving water temperature of gas fired-boiler 1, the open degree of regulating valve 41 is turned down.
Above example is only to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacing, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention
Among sharp claimed range.
Claims (5)
1. gas fired-boiler temperature-constant operation method, it is characterised in that：This method is carried out using intumescent constant-temperature hot water system, expansion
Type constant-temperature hot water system includes gas fired-boiler, water main and return main, and the water inlet of gas fired-boiler is connected with return main
Connect, the delivery port of gas fired-boiler is connected with water main；The return main is connected with expansion tank, expansion tank connection
There is filling pipe, filling pipe is connected with small pump, and small pump is connected with water supply tank, and water supply tank is connected with water softener, water softener connection
Municipal tap water pipe network；The return main of gas fired-boiler entrance is provided with circulating pump；
One end that water main is connected with gas fired-boiler is its initiating terminal, and the end of water main is connected with diversion box, divides water
Case is connected with some water supply branch pipes, and shunt valve is respectively equipped with each water supply branch pipe, heat unit is used at each water supply branch pipe connection one
Hot water inlet pipe, expansion tank is located at the top of highest heat unit；
One end that return main is connected with gas fired-boiler is its initiating terminal, and the end of return main is connected with header tank；Catchment
Case is connected with some return branch, and back-water valve (BWV) is respectively equipped with each return branch, heat unit is used at each return branch connection one
Hot water outlet pipe；
Gas fired-boiler is connected with combustion gas inlet pipe, and the first combustion gas branch pipe and the second combustion gas branch pipe are connected in parallel on combustion gas inlet pipe, the
One combustion gas branch pipe is provided with the first gas valve, is connected on the second combustion gas branch pipe and is provided with the second gas valve and gas fired-boiler hot water constant temperature
Valve；Hot water barrel is connected in series with the water main in gas fired-boiler exit, the internal diameter of hot water barrel is more than the internal diameter of water main；
Gas fired-boiler heat water temperature-constant valve includes valve body, and vertically arranged inner chamber is provided with valve body, and the horizontal cross-section of inner chamber is rounded,
Intracavity sidewall slidably connects valve element, and valve element includes jacking block, sole piece and the connecting pole being connected between jacking block and sole piece, jacking block and
Sole piece is slidingly sealed cooperation with intracavity sidewall respectively；Jacking block, sole piece, connecting pole and the side wall of inner chamber surround toroidal cavity；One
Venthole is provided with side valve body, venthole is inner to be connected with escape pipe, venthole phase with the intracavity inter-connection of valve body and its outer end
Air admission hole, the inner of air admission hole and the intracavity inter-connection of valve body are provided with the valve body of offside, the outer end of air admission hole is connected with air inlet
Pipe；
Stage clip is connected between the top of jacking block and the inner chamber roof of valve body；Sole piece is crimped with downwards push rod, push rod upper diameter
More than lower diameter, push rod top is through valve body and stretches into the inner chamber of valve body, and push rod top coordinates with valve body slides sealing, push rod
Top and sole piece press fit；Fixed seat is provided with below valve body, is provided with vertical through holes in fixed seat, push rod bottom extends downwardly into perpendicular
Cooperation is slidingly sealed to through hole and with the hole wall of vertical through holes；The lower ending opening of vertical through holes is connected with expansion tube, and expansion tube connects
Temperature-sensitive case is connected to, inflation fluid is filled in temperature-sensitive case；Temperature-sensitive case is installed in hot water barrel；
Valve element has upper extreme position and lower limit position, venthole when valve element is between upper extreme position and lower limit position
All the time it is connected with toroidal cavity；Air admission hole is isolated with toroidal cavity when valve element is located at upper extreme position, and valve element is located at lower pole
It is the initial position of valve element during extreme position, air admission hole and toroidal cavity are fully switched on when valve element is located at initial position；Valve element has
Equilbrium position, the equilbrium position of valve element is between upper extreme position and lower limit position, annular when valve element is located at equilbrium position
The top of cavity is less than the top of air admission hole higher than the bottom of air admission hole top and toroidal cavity, toroidal cavity and air inlet position in
Partially communicating state；The height of toroidal cavity is equal to the height of air admission hole；Gas fired-boiler heat water temperature-constant valve passes through its escape pipe
It is connected in series in air inlet pipe on the second combustion gas branch pipe；Also include plate type heat exchanger, plate type heat exchanger includes the first import, the
Two imports, first outlet and second outlet, first import and first outlet are connected in series on water main, and described second
Import and second outlet are connected in series on return main；
Gas fired-boiler temperature-constant operation method is carried out according to the following steps successively：
Process is up first, opens each shunt valve, back-water valve (BWV), the first gas valve, closes the second gas valve and regulating valve,
Combustion gas supplies gas fired-boiler after the first gas valve and the first combustion gas branch pipe and combustion gas inlet pipe；Start gas fired-boiler and circulation
Pump, recirculated water are heated in gas fired-boiler, and the hot water formed after heating enters water main；At the same time backwater passes through each
With entering return main after the hot water outlet pipe of heat unit, each return branch and header tank；When hot water passes through plate type heat exchanger with
Backwater is exchanged heat, and will be controlled within a predetermined range for the temperature difference of backwater while backwater obtains preheating；Hot water is changed by board-like
Enter diversion box through water main after hot device, supplied after each water supply branch pipe and each hot water inlet pipe with heat unit each single with heat
Position；Backwater enters gas fired-boiler after plate type heat exchanger through circulating pump and return main, forms a complete waterway circulating；
There is stable pressure in expansion tank guarantee system, after water level reduces in expansion tank, start water softener and small pump, to
Supplement water is until topped up with water in expansion tank in expansion tank；
When the temperature monitor and control mechanism malfunction of gas fired-boiler, the second gas valve is opened immediately, closes the first gas valve,
Combustion gas supplies gas fired-boiler by gas fired-boiler heat water temperature-constant valve, and holding system continues to run with；
The deadweight of the downward pressure on top surface of spring and valve element forms lower pressure to valve element, and the upward pressure on top surface of inflation fluid forms pressure
Power, during normal work, valve element is located at its equilbrium position, and now upper pressure and lower pressure reach poised state；
When gas fired-boiler leaving water temperature exceedes normal range (NR), the upper pressure increase after becoming big of the inflation fluid volume in temperature-sensitive case, push away
Dynamic push rod and the upward out equilbrium position of valve element, so as to reduce the connection area of toroidal cavity and air admission hole, reduce gas fired-boiler
Air inflow；Gas fired-boiler leaving water temperature is higher, and inflation fluid dilatation is bigger, and the leaving water temperature of gas fired-boiler exceedes setting
During ceiling temperature, valve element reaches its upper extreme position, and air admission hole is isolated with toroidal cavity, so as to stop to supply to gas fired-boiler
Combustion gas；After the air inflow of gas fired-boiler reduces or interrupted, the leaving water temperature of gas fired-boiler gradually reduces, the expansion in temperature-sensitive case
After liquid product diminishes, under the elastic force effect of stage clip, valve element moves down, until valve element reaches its equilbrium position；
When gas fired-boiler leaving water temperature is less than normal range (NR), the inflation fluid volume in temperature-sensitive case goes up pressure after diminishing and diminished,
Under the elastic force effect of stage clip, valve element is downward away from equilbrium position, so as to expand the connection area of toroidal cavity and air admission hole, increase
The air inflow of gas fired-boiler, when the leaving water temperature of gas fired-boiler is less than the lower limit temperature set, valve element reaches its lower limit position,
The connection area of air admission hole and toroidal cavity reaches maximum；After the air inflow increase of gas fired-boiler, the leaving water temperature of gas fired-boiler
Gradually rise, after the inflation fluid volume in temperature-sensitive case becomes big, under the elastic force effect of stage clip, valve element moves up, until valve element
Reach its equilbrium position；
Valve element is stable at equilbrium position, and gas fired-boiler leaving water temperature is maintained at predetermined leaving water temperature.
2. gas fired-boiler temperature-constant operation method according to claim 1, it is characterised in that：The temperature-sensitive case is connected with regulation
Pipe, regulation pipe are connected with regulating box, and regulation pipe is provided with regulating valve；When needing to heighten the predetermined leaving water temperature of gas fired-boiler, open
Open regulating valve；
The open degree of regulating valve is bigger, and the inflation fluid into regulating box is more, enters under identical gas fired-boiler leaving water temperature
The inflation fluid of vertical through holes is fewer in fixed seat, and inflation fluid is to upper pressure is with regard to smaller caused by push rod, the balance position of corresponding valve element
Put lower；Therefore, the open degree of regulating valve is bigger, the connection area of toroidal cavity and air admission hole when valve element is located at equilbrium position
Also bigger, the quantity of heat production of corresponding gas fired-boiler and the leaving water temperature of gas fired-boiler are higher；
The open degree of valve is controlled to adjust so as to controlling the leaving water temperature of gas fired-boiler, it is necessary to improve the leaving water temperature of gas fired-boiler
When, tune up the open degree of regulating valve；When needing to reduce the leaving water temperature of gas fired-boiler, the open degree of regulating valve is turned down.
3. gas fired-boiler temperature-constant operation method according to claim 1, it is characterised in that：At the upper extreme position of valve element
Intracavity sidewall is provided with upper locating ring, and the intracavity sidewall at the lower limit position of valve element is provided with lower locating ring.
4. gas fired-boiler temperature-constant operation method according to claim 1, it is characterised in that：The inflation fluid is mercury or second
Alcohol.
5. gas fired-boiler temperature-constant operation method according to claim 1, it is characterised in that：The fixed seat upper surface is surround
The push rod is provided with upper sealing ring, and the fixed seat lower surface is provided with lower seal around the expansion tube.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710942994.2A CN107843004B (en) | 2017-10-11 | 2017-10-11 | Constant-temperature operation method of gas boiler |
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| CN201710942994.2A CN107843004B (en) | 2017-10-11 | 2017-10-11 | Constant-temperature operation method of gas boiler |
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| CN107843004B CN107843004B (en) | 2020-03-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860065A (en) * | 2017-11-10 | 2018-03-30 | 西藏世峰高科能源技术有限公司 | Charging pile Control Room air-conditioning system |
| CN110966772A (en) * | 2019-11-30 | 2020-04-07 | 陕西强德泰亿诺节能环保设备有限公司 | Multi-medium multi-temperature intelligent heating system and method |
| CN112984603A (en) * | 2021-03-03 | 2021-06-18 | 济宁华源热电有限公司 | Heat supply and matched implementation device |
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| WO2001020210A1 (en) * | 1999-09-10 | 2001-03-22 | Inax Corporation | Hot and cold water mixing device |
| CN201047660Y (en) * | 2007-06-01 | 2008-04-16 | 青岛青义锅炉有限公司 | Gas-combustion boiler and thermal cycle device |
| CN101655166A (en) * | 2008-08-20 | 2010-02-24 | 全龙浩 | Mixed water valve for automatically limiting flow |
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2017
- 2017-10-11 CN CN201710942994.2A patent/CN107843004B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001020210A1 (en) * | 1999-09-10 | 2001-03-22 | Inax Corporation | Hot and cold water mixing device |
| CN201047660Y (en) * | 2007-06-01 | 2008-04-16 | 青岛青义锅炉有限公司 | Gas-combustion boiler and thermal cycle device |
| CN101655166A (en) * | 2008-08-20 | 2010-02-24 | 全龙浩 | Mixed water valve for automatically limiting flow |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860065A (en) * | 2017-11-10 | 2018-03-30 | 西藏世峰高科能源技术有限公司 | Charging pile Control Room air-conditioning system |
| CN107860065B (en) * | 2017-11-10 | 2023-10-24 | 西藏世峰高科能源技术有限公司 | Charging pile monitoring room air conditioning system |
| CN110966772A (en) * | 2019-11-30 | 2020-04-07 | 陕西强德泰亿诺节能环保设备有限公司 | Multi-medium multi-temperature intelligent heating system and method |
| CN110966772B (en) * | 2019-11-30 | 2021-12-17 | 陕西强德泰亿诺节能环保设备有限公司 | Multi-medium multi-temperature intelligent heating system and method |
| CN112984603A (en) * | 2021-03-03 | 2021-06-18 | 济宁华源热电有限公司 | Heat supply and matched implementation device |
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| CN107843004B (en) | 2020-03-20 |
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