CN110410769A - The pressure release control device and its control method of steam boiler - Google Patents
The pressure release control device and its control method of steam boiler Download PDFInfo
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- CN110410769A CN110410769A CN201910683783.0A CN201910683783A CN110410769A CN 110410769 A CN110410769 A CN 110410769A CN 201910683783 A CN201910683783 A CN 201910683783A CN 110410769 A CN110410769 A CN 110410769A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000010865 sewage Substances 0.000 claims abstract description 24
- 239000013589 supplement Substances 0.000 claims abstract description 19
- 230000005611 electricity Effects 0.000 claims description 18
- 238000011017 operating method Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 8
- 238000009790 rate-determining step (RDS) Methods 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 239000012535 impurity Substances 0.000 description 5
- 230000003020 moisturizing effect Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- 208000033999 Device damage Diseases 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000000232 gallbladder Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements or dispositions of alarm or automatic safety devices
- F22B37/44—Applications, arrangements or dispositions of alarm or automatic safety devices of safety valves
- F22B37/446—Safety devices responsive to overpressure
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The pressure release control device and its control method of a kind of steam boiler disclosed in this invention, including three-way electric valve, the venthole on steam boiler liner and control system, the interface one of three-way electric valve is installed on steam boiler liner, its interface two is used as sewage draining exit, and interface three is used as water supplement port；The electronic execution position of three-way electric valve is electrically connected to the control system, and control system is used to control the electronic execution position of three-way electric valve, and interface one is promoted to be connected to interface two or interface one and interface tee joint.Triple valve can be switched to sewage draining exit automatically after steam boiler normal shutdown and is connected to liner by it, then using be present under the gas pressure in liner by inside liner dirt and water be discharged through sewage draining exit, avoid the liner of steam boiler for a long time by steam water interface corrosion and long-time air pressure pressure-bearing, and lead to furnace body itself and the device of connection furnace body causes the case where corroding and damaging, to promote the safety used, stability and service life.
Description
Technical field
The present invention relates to a kind of steam boiler pressure release control technology field, the pressure release of especially a kind of steam boiler controls dress
It sets and its control method.
Background technique
In the prior art, steam boiler normally generates steam output in liner after being powered, when steam exports and generate steaming
After the steam boiler of vapour is closed, liner is steam heater existing for inside, in the state of not using for a long time, due to
Air pressure can be still had in the liner of steam boiler, long-time pressure-bearing is easy to the device connecting with steam boiler inside liner
It damages, and furnace interior contains the foreign matters such as part scale, impurity after steam generator operation, will cause for a long time
Furnace tubes block and then cause major accident, affect the security and stability of steam boiler, reduce the use of steam boiler
Service life.
Summary of the invention
A kind of structure designed the purpose of the present invention is to solve the deficiency of above-mentioned technology is simple, safety, stabilization
The pressure release control device and its control method of the higher steam boiler of property.
The pressure release control device of steam boiler designed by the present invention, including three-way electric valve, be set to steam boiler liner
On venthole and control system, the interface one of three-way electric valve be installed on steam boiler liner, interface two as row
Dirty mouth, interface three are used as water supplement port；The electronic execution position of three-way electric valve is electrically connected to the control system, and control system is used for
The electronic execution position for controlling three-way electric valve promotes interface one to be connected to interface two or interface one and interface tee joint.
Further preferably, control system includes relay K1, relay contact group K1-1 and K1-2, starts switch SW, electricity
Source anode L+, power cathode M and in three-way electric valve electronic execution position limit switch LS1 and limit switch
LS2；The feeder ear A1 at electronic execution position is connected by relay contact group K1-1 with limit switch LS1 in motor-driven valve, is supplied
Electric end A2 is connected by relay contact group K1-2 with limit switch LS2；The contact four of relay contact group K1-1, relay touching
The contact five of point group K1-2 and the pin one for starting switch SW are connected with positive pole L+；Start switch SW and relay K1 phase
It is mutually connected in series, the pin A2 of the pin two of limit switch LS1, the pin two of limit switch LS2 and relay K1 is and power supply
Cathode M is connected.
Further preferably, the electro connecting pressure gauge of built-in pressure switch PW is installed at venthole；Pressure switch PW, pressure
Switch PW, which is connected on, to be started switch between SW and relay K1.
Further preferably, three-way electric valve is the three-way electric valve with farad capacitor, is equipped with small pump on interface three.
It further preferably, further include emergency stop switch ST, emergency stop switch ST is connected between relay K1 and pressure switch PW.
Further preferably, SW is started switch to start switch for open type；Emergency stop switch ST is closed type emergency stop switch；Electricity connects
The pressure switch PW of point pressure table is closed type pressure switch.
A kind of steam boiler releasing pressure automatically control method, using the pressure release control device of above-described steam boiler, tool
Body includes that rate-determining steps are as follows:
Steam boiler liner is during normally generating steam:
S1, steam boiler liner venthole the steam of generation is discharged, be closed control system at this time starts switch SW,
Reverse power supply is carried out to the electronic execution position of three-way electric valve, promotes the valve rod of three-way electric valve to rotate counterclockwise, interface
Two close, and interface three and interface one are interconnected, and realize that water supplement port is connected to steam boiler liner；
S2, the SW that starts switch for disconnecting control system, control system carry out just the electronic execution position of three-way electric valve
To power supply, the valve rod of three-way electric valve is promoted to rotate clockwise, interface three is closed, and interface two and interface one are interconnected,
It realizes that sewage draining exit is connected to steam boiler liner, pressure release is carried out with the liner to steam boiler.
Further preferably, steps are as follows for the carrying out practically based on step S1:
S11, SW closure is started switch, relay K1 obtains electric, and contact 12 and the contact eight of relay contact group K1-1 connects
Logical, the contact nine and contact five of relay contact group K1-2 is connected；The valve rod rotary spacing of limit switch LS1 and three-way electric valve
Point separation, and it is in closed state；The electronic execution position of motor-driven valve obtains electricity operation at this time, starts to rotate counterclockwise electric three-way
The valve rod of valve, spool the rotating counterclockwise come down interface two, one phase of interface three and interface using its valve rod of three-way electric valve
It is intercommunicated, the valve rod rotary spacing point difference of limit switch LS2 and three-way electric valve, and it is in closed state.
Further preferably, under the operating status of step S11, the valve rod rotary spacing point triggering limit of three-way electric valve is opened
LS1 is closed, so that limit switch LS1 is disconnected, three-way electric valve power loss stops working, and the spool of three-way electric valve keeps step S11
Position, interface two still closes, and interface three and interface one are still interconnected.
Further preferably, steps are as follows for the carrying out practically based on step S2:
S21, SW disconnection is started switch, relay K1 power loss, contact 12 and the contact four of relay contact group K1-1 connects
Logical, the contact nine and contact one of relay contact group K1-2 is connected；The valve rod rotary spacing of limit switch LS2 and three-way electric valve
Point separation, and it is in closed state；Three-way electric valve obtains electricity operation at this time, starts the valve rod for rotating clockwise three-way electric valve,
The spool of three-way electric valve is rotated clockwise using its valve rod come down interface three, and interface two and interface one are interconnected, limit
Bit switch LS1 is separated with the valve rod rotary spacing point of three-way electric valve, and is in closed state.
Further preferably, under the operating status of step S21, the valve rod rotary spacing point triggering limit of three-way electric valve is opened
LS2 is closed, so that limit switch LS1 is disconnected, three-way electric valve power loss stops working, and the spool of three-way electric valve keeps step S21
Position, interface three still closes, and interface two and interface one are still interconnected.
Further preferably, further include that operating procedure is as follows:
S3, SW closure and steam boiler are started switch when normally generating steam, electro connecting pressure gauge is utilized to monitor steam
Inside of boiler internal pressure whether exceed pressure set points control the interface one of three-way electric valve be connected to interface two or with
Interface tee joint, or start switch SW disconnect and steam boiler stop generate steam when, monitored using electro connecting pressure gauge
Control the interface one of three-way electric valve with the presence or absence of pressure inside steam boiler liner and be connected to interface two or with interface three
Connection.
Further preferably, beyond after pressure set points, electricity connects electro connecting pressure gauge monitoring steam boiler liner internal pressure
Pressure switch PW on point pressure table is triggered and disconnects, and starts switch SW closure, the at this time power supply of relay K1, relay touching
The contact 12 and contact four of point group K1-1 is connected, and the contact nine and contact one of relay contact group K1-2 is connected, limit switch
LS2 is separated with the valve rod rotary spacing point of three-way electric valve, and is in closed state；Three-way electric valve obtains electricity operation at this time, opens
Beginning rotates clockwise the valve rod of three-way electric valve, spool the rotating clockwise come down interface using its valve rod of three-way electric valve
Three, interface two and interface one are interconnected, and limit switch LS1 is separated with the valve rod rotary spacing point of three-way electric valve, and is in
Closed state.
Further preferably, further include that operating procedure is as follows:
S4, SW closure and steam boiler are started switch when normally generating steam, disconnect the emergency stop switch ST of control system,
Control system carries out positive power supply to the electronic execution position of three-way electric valve, and the valve rod of three-way electric valve is promoted to revolve clockwise
Turn, interface three is closed, and interface two and interface one are interconnected, and realizes that sewage draining exit is connected to steam boiler liner, to steaming
The liner of boiler furnace carries out pressure release.
Further preferably, steps are as follows for the carrying out practically based on step S4:
S41, emergency stop switch ST disconnect after, disconnect relay K1 power supply, the contact 12 of relay contact group K1-1 with
Contact four is connected, and the contact nine and contact one of relay contact group K1-2 is connected, the valve rod of limit switch LS2 and three-way electric valve
The separation of rotary spacing point, and it is in closed state；Three-way electric valve obtains electricity operation at this time, starts to rotate clockwise three-way electric valve
Valve rod, the spool of three-way electric valve being rotated clockwise using its valve rod come down interface three, and interface two and interface one are mutual
Connection, limit switch LS1 are separated with the valve rod rotary spacing point of three-way electric valve, and are in closed state.
The pressure release control device and its control method of steam boiler designed by the present invention, in steam boiler normal shutdown
Triple valve can be switched to sewage draining exit automatically after (start switch SW disconnection) to be connected to liner, then using being present in liner
Under gas pressure by inside liner dirt and water be discharged through sewage draining exit, interface three is closed to prevent during clearing up liner
Moisturizing pump return water enters liner and causes to corrode, and avoids the liner of steam boiler for a long time by steam water interface corrosion and long-time gas
Pressure-bearing is pressed, and leads to furnace body itself and the device of connection furnace body causes the case where corroding and damage, further promotes use
Safety, stability and service life.
Detailed description of the invention
Fig. 1 is overall structure diagram；
Fig. 2 is control system architecture schematic diagram (one)；
Fig. 3 is control system architecture schematic diagram (two)；
Fig. 4 is control system architecture schematic diagram (three)；
Fig. 5 is control system architecture schematic diagram (four)；
Fig. 6 is control system architecture schematic diagram (five)；
Fig. 7 is control system architecture schematic diagram (six)；.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's every other embodiment obtained belong to what the present invention protected
Range.
Embodiment 1:
As shown in Fig. 1-Fig. 7, the pressure release control device of steam boiler described in the present embodiment, including three-way electric valve 2,
Venthole 11 and control system 3 on steam boiler liner 1, the interface 1 of three-way electric valve 2 are installed on steam copper
On furnace internal-lining 1, interface 2 22 is used as sewage draining exit, and interface 3 23 is used as water supplement port, is equipped with small pump on interface 3 23；
The electronic execution position of three-way electric valve 2 is electrically connected with control system 3, and control system 3 is for controlling the electronic of three-way electric valve 2
Position is executed, promotes that interface 1 is connected to interface 2 22 or interface 1 is connected to interface 3 23.Three-way electric valve is one
The valve of kind valve inner installation valve rod and spool, the motion control spool of valve rod carry out down interface two or interface three.
The working principle of above-mentioned apparatus utilizes control system control when the liner of steam boiler normally generates steam and is discharged
The water supplement port of three-way electric valve is connected to by the electronic execution position of three-way electric valve processed with interface one, and sewage draining exit is closed at this time, with
Reach and water-refilling operation is carried out to liner；After steam boiler shutdown, the electronic execution of control system control three-way electric valve is utilized
The sewage draining exit of three-way electric valve is connected to by position with interface one, and water supplement port is closed at this time, the height generated in conjunction with water using steam
Moisture content, steam and dirt under the action of pressure steam water interface in quick liner are discharged from sewage draining exit, and rinse in boiler simultaneously
Gallbladder and bottom pipe circuit, preventing moisturizing pump return water from entering liner while clearing up liner causes to corrode, also avoid in steam copper
Still have in furnace internal-lining and is not used for a long time and leads to furnace body in the case where moisture content, steam and dirt itself and connection furnace body
Device damages or generation the case where heavy corrosion.
In the present embodiment, control system includes relay K1, relay contact group K1-1 and K1-2, starts switch SW, electricity
Source anode L+, power cathode M and in three-way electric valve electronic execution position limit switch LS1 and limit switch
LS2；The feeder ear A1 at electronic execution position is connected by relay contact group K1-1 with limit switch LS1 in motor-driven valve, is supplied
Electric end A2 is connected by relay contact group K1-2 with limit switch LS2；The contact four of relay contact group K1-1, relay touching
The contact five of point group K1-2 and the pin one for starting switch SW are connected with positive pole L+；Start switch SW and relay K1 phase
Mutually be connected in series, the cathode PE at the electronic execution position of motor-driven valve, the pin two of limit switch LS1, limit switch LS2 pin two
It is connected with power cathode M with the pin A2 of relay K1.Wherein, SW is started switch to start switch for open type.Its structure control
System processed realizes the interface switching to three-way electric valve by the power supply commutation to three-way electric valve, so that control is more accurate
Reliably, the stability that lifting means uses.
The electro connecting pressure gauge of built-in pressure switch PW is installed in the present embodiment, at venthole；Pressure switch PW, pressure
Switch PW, which is connected on, to be started switch between SW and relay K1；The pressure switch PW of electro connecting pressure gauge is that closed type pressure is opened
It closes.In the operation of its structure steam boiler equipment (in the case that the water supplement port of three-way electric valve is connected to interface one), when generation adds
When the safe defective valve installed in thermal runaway or liner causes pressure persistently to rise, pressure reaches the meeting of electro connecting pressure gauge alarming value
Pressure switch PW is triggered immediately, promotes the electronic enforcement division level control valve bar of three-way electric valve to act, water supplement port is closed, and is arranged
Dirty mouth carries out quick pressure releasing after being connected to interface one, and it is safe to fully ensure that equipment uses；Simultaneously after equipment is shut down, steam copper
It is learnt with the presence or absence of pressure by electro connecting pressure gauge in the liner of furnace, when electro connecting pressure gauge detects the liner of steam boiler
In deposit under stress situations, controlled by the pressure switch PW of control system three-way electric valve interface automatic switchover, by moisturizing
Mouth is closed, and liner is connected to sewage draining exit, releases the intracorporal pressure of furnace.Steam generator is avoided to close based on the characteristic of automatic switchover
There are still foreign matters, the furnace bodies such as pressure, steam water interface and part scale, impurity not to use feelings in long-time in furnace body when closing
Under condition, long-time pressure-bearing can damage the device of furnace body itself and connection furnace body, and steam water interface is to furnace body itself and even
The device for connecing furnace body, which damages, to be caused to corrode, and the foreign matters such as part scale, impurity cause furnace tubes to block and then cause serious
The case where accident, occurs.
In the present embodiment, three-way electric valve is the three-way electric valve with farad capacitor.The characteristic of farad capacitor storage, thus
It powers as power supply to device, this structure all executable valve in the case where equipment normal shutdown and accident power-off or power failure
Switching control；Motor-driven valve can be switched into sewage draining exit using storage automatically when unit exception has a power failure, prevent control system disconnected
Electricity can not occur the case where pressure release.
Further include emergency stop switch ST in the present embodiment, emergency stop switch ST be connected on relay K1 and pressure switch PW it
Between.；Emergency stop switch ST is closed type emergency stop switch；When special emergency occurs, (especially pressure switch PW is controlled
When releasing pressure automatically function is damaged), press emergency stop can the interface one of switching three-way motor-driven valve immediately be connected to sewage draining exit, water supplement port pass
It closes, promptly lays down the pressure in inside of boiler, guarantee the person and equipment safety.
Embodiment 2:
A kind of steam boiler releasing pressure automatically control method, using the pressure release control device of steam boiler described in embodiment 1,
It is as follows to specifically include rate-determining steps:
Steam boiler liner is during normally generating steam:
S1, steam boiler liner 1 venthole 11 steam of generation is discharged, the starting for being closed control system 3 at this time is opened
SW is closed, reverse power supply is carried out to the electronic execution position of three-way electric valve, the valve rod of three-way electric valve 2 is promoted to rotate counterclockwise,
Its interface 2 22 is closed, and interface 3 23 and interface 1 are interconnected, and is realized that water supplement port is connected to steam boiler liner, is completed
It is discharged after generating steam on one side from venthole, the water level sensor after water level reduction in liner exports a signal to moisturizing
Pump, promotes small pump to be actuated for water-refilling operation；
S2, the SW that starts switch for disconnecting control system, control system carry out just the electronic execution position of three-way electric valve
To power supply, the valve rod of three-way electric valve is promoted to rotate clockwise, interface three is closed, and interface two and interface one are interconnected,
It realizes that sewage draining exit is connected to steam boiler liner, pressure release is carried out with the liner to steam boiler；This operating procedure is closed in equipment
It is carried out after machine, to realize that the sewage draining exit of three-way electric valve is opened, water supplement port is closed, and under the action of vapor pressure quickly
Moisture content, steam and the dirt in liner are cleared up, preventing moisturizing pump return water from entering liner while clearing up liner causes to corrode.
As shown in Fig. 2, steps are as follows for the carrying out practically based on step S1 in the present embodiment:
S11, SW closure is started switch, relay K1 obtains electric, and contact 12 and the contact eight of relay contact group K1-1 connects
Logical, the contact nine and contact five of relay contact group K1-2 is connected；The valve rod rotary spacing of limit switch LS1 and three-way electric valve
Point separation, and it is in closed state；The electronic execution position of motor-driven valve obtains electricity operation at this time, starts to rotate counterclockwise electric three-way
The valve rod of valve, spool the rotating counterclockwise come down interface two, one phase of interface three and interface using its valve rod of three-way electric valve
It is intercommunicated, the valve rod rotary spacing point difference of limit switch LS2 and three-way electric valve, and it is in closed state.This step in order to
Reach steam boiler starting after carry out three-way electric valve switching control, realize equipment operate normally, and by water supplement port with
Interface one is connected to, and sewage draining exit is closed.
As shown in figure 3, the valve rod rotary spacing point of three-way electric valve is run to limit under the operating status based on step S11
At the position bit switch LS1, and limit switch LS1 is triggered, so that limit switch LS1 is disconnected, three-way electric valve power loss stops working,
The spool of three-way electric valve keeps the position of step S11, and interface two is still closed, and interface three and interface one are still interconnected.
This step is ending phase of the step S11 to three-way electric valve interface switching control, in order to guarantee the interface one of three-way electric valve
After interface tee joint, three-way electric valve it is out of service and be maintained at interface three and interface one still be interconnected, interface two is still
The state so closed.
As shown in figure 4, steps are as follows for the carrying out practically based on step S2 in the present embodiment:
S21, SW disconnection is started switch, relay K1 power loss, contact 12 and the contact four of relay contact group K1-1 connects
Logical, the contact nine and contact one of relay contact group K1-2 is connected；The valve rod rotary spacing of limit switch LS2 and three-way electric valve
Point separation, and it is in closed state；Three-way electric valve obtains electricity operation at this time, starts the valve rod for rotating clockwise three-way electric valve,
The spool of three-way electric valve is rotated clockwise using its valve rod come down interface three, and interface two and interface one are interconnected, limit
Bit switch LS1 is separated with the valve rod rotary spacing point of three-way electric valve, and is in closed state.This step is in order to reach in steam
After boiler plant normal shutdown carry out three-way electric valve switching control, realize equipment operate normally, and by sewage draining exit with connect
Mouth one is connected to, and water supplement port is closed.
As shown in figure 5, in the present embodiment, under the operating status of step S21, the valve rod rotary spacing point of three-way electric valve
Limit switch LS2 is triggered, so that limit switch LS1 is disconnected, three-way electric valve power loss stops working, and the spool of three-way electric valve is protected
The position of step S21 is held, interface three is still closed, and interface two and interface one are still interconnected.This step is step S21 to three
The ending phase of logical motor-driven valve interface switching control, after guaranteeing that the interface one of three-way electric valve is connected to interface two, threeway
Motor-driven valve it is out of service and be maintained at interface two and interface one still be interconnected, the state that interface three is still closed.
As shown in fig. 6, further including that operating procedure is as follows in the present embodiment:
S3, SW closure and steam boiler are started switch when normally generating steam, electro connecting pressure gauge is utilized to monitor steam
Inside of boiler internal pressure whether exceed pressure set points control the interface one of three-way electric valve be connected to interface two or with
Interface tee joint, or start switch SW disconnect and steam boiler stop generate steam when, monitored using electro connecting pressure gauge
Control the interface one of three-way electric valve with the presence or absence of pressure inside steam boiler liner and be connected to interface two or with interface three
Connection.
After electro connecting pressure gauge monitoring steam boiler liner internal pressure exceeds pressure set points, on electro connecting pressure gauge
Pressure switch PW is triggered and disconnects, and starts switch SW closure, disconnects the power supply of relay K1, relay contact group K1-1 at this time
Contact 12 and contact four connect, the contact nine of relay contact group K1-2 and contact one are connected, limit switch LS2 and threeway
The valve rod rotary spacing point of motor-driven valve separates, and is in closed state；Three-way electric valve obtains electricity operation at this time, starts to turn clockwise
The valve rod of dynamic three-way electric valve, spool the rotating clockwise come down interface three, interface two using its valve rod of three-way electric valve
It is interconnected with interface one, limit switch LS1 is separated with the valve rod rotary spacing point of three-way electric valve, and is in closed state.
Above-mentioned rate-determining steps automatically control the interface switching of three-way electric valve in order to realize, in steam boiler equipment operation
(in the case that the water supplement port of three-way electric valve is connected to interface one), when the safety valve for occurring to install on the out of control or liner of heating loses
When effect causes pressure persistently to rise, pressure reaches electro connecting pressure gauge alarming value can trigger pressure switch PW immediately, promote threeway
The electronic enforcement division level control valve bar of motor-driven valve acts, and water supplement port is closed, and sewage draining exit carries out quickly after being connected to interface one
It is safe to fully ensure that equipment uses for pressure release；Simultaneously after equipment is shut down, pass through in the liner of steam boiler with the presence or absence of pressure
Electro connecting pressure gauge is learnt, when depositing in the liner that electro connecting pressure gauge detects steam boiler under stress situations, passes through control
The pressure switch PW of system automatically switches to control three-way electric valve interface, water supplement port is closed, liner is connected to sewage draining exit, lets out
The intracorporal pressure of loss of sheet.Based on the rate-determining steps of automatic switchover come when steam generator being avoided to close in furnace body there are still pressure,
The foreign matters such as steam water interface and part scale, impurity, for furnace body when not using for a long time, long-time pressure-bearing can be to furnace
Body itself and the device for connecting furnace body damage, and steam water interface damages the device of furnace body itself and connection furnace body and makes
At corrosion, the foreign matters such as part scale, impurity cause furnace tubes to block the case where causing major accident in turn generation.
As shown in fig. 7, further including that operating procedure is as follows in the present embodiment:
S4, SW closure and steam boiler are started switch when normally generating steam, disconnect the emergency stop switch ST of control system,
Control system carries out positive power supply to the electronic execution position of three-way electric valve, and the valve rod of three-way electric valve is promoted to revolve clockwise
Turn, interface three is closed, and interface two and interface one are interconnected, and realizes that sewage draining exit is connected to steam boiler liner, to steaming
The liner of boiler furnace carries out pressure release.
Steps are as follows for carrying out practically based on step S4:
S41, emergency stop switch ST disconnect after, disconnect relay K1 power supply, the contact 12 of relay contact group K1-1 with
Contact four is connected, and the contact nine and contact one of relay contact group K1-2 is connected, the valve rod of limit switch LS2 and three-way electric valve
The separation of rotary spacing point, and it is in closed state；Three-way electric valve obtains electricity operation at this time, starts to rotate clockwise three-way electric valve
Valve rod, the spool of three-way electric valve being rotated clockwise using its valve rod come down interface three, and interface two and interface one are mutual
Connection, limit switch LS1 are separated with the valve rod rotary spacing point of three-way electric valve, and are in closed state.
When special emergency occurs, (especially pressure switch PW carries out control releasing pressure automatically function to above-mentioned rate-determining steps
When damage), press emergency stop can the interface one of switching three-way motor-driven valve immediately be connected to sewage draining exit, water supplement port is closed, and is promptly laid down
Pressure in inside of boiler guarantees the person and equipment safety.
The present invention is not limited to above-mentioned preferred forms, anyone can show that other are various under the inspiration of the present invention
The product of form, however, make any variation in its shape or structure, it is all that there is skill identical or similar to the present application
Art scheme, is within the scope of the present invention.
Claims (15)
1. a kind of pressure release control device of steam boiler, which is characterized in that including three-way electric valve, be set on steam boiler liner
Venthole and control system, the interface one of three-way electric valve be installed on steam boiler liner, interface two be used as blowdown
Mouthful, interface three is used as water supplement port；The electronic execution position of three-way electric valve is electrically connected to the control system, and control system is for controlling
The electronic execution position of three-way electric valve processed promotes interface one to be connected to interface two or interface one and interface tee joint.
2. the pressure release control device of steam boiler according to claim 1, which is characterized in that control system includes relay
K1, relay contact group K1-1 and K1-2, SW, positive pole L+, power cathode M are started switch and is set to three-way electric valve
In electronic execution position limit switch LS1 and limit switch LS2；In motor-driven valve the feeder ear A1 at electronic execution position by after
Appliance contact group K1-1 is connected with limit switch LS1, and feeder ear A2 passes through relay contact group K1-2 and limit switch LS2 phase
Even；The contact four of relay contact group K1-1, the contact five of relay contact group K1-2 and start switch the pin one of SW with
Positive pole L+ is connected；It starts switch SW and relay K1 is connected in series with each other, pin two, the limit switch of limit switch LS1
The pin two of LS2 and the pin A2 of relay K1 are connected with power cathode M.
3. the pressure release control device of steam boiler according to claim 2, which is characterized in that be equipped at venthole built-in
The electro connecting pressure gauge of pressure switch PW；Pressure switch PW, pressure switch PW, which are connected on, to be started switch between SW and relay K1.
4. the pressure release control device of steam boiler according to claim 3, which is characterized in that three-way electric valve is band farad
The three-way electric valve of capacitor is equipped with small pump on interface three.
5. the pressure release control device of steam boiler according to claim 4, which is characterized in that it further include emergency stop switch ST,
Emergency stop switch ST is connected between relay K1 and pressure switch PW.
6. the pressure release control device of steam boiler according to claim 6, which is characterized in that starting switch SW is open type
It starts switch；Emergency stop switch ST is closed type emergency stop switch；The pressure switch PW of electro connecting pressure gauge is closed type pressure switch.
7. a kind of steam boiler releasing pressure automatically control method, which is characterized in that using letting out for steam boiler as claimed in claim 6
It is as follows to specifically include rate-determining steps for pressure control device:
Steam boiler liner is during normally generating steam:
S1, steam boiler liner venthole the steam of generation is discharged, control system starts switch SW closure at this time, to three
The electronic execution position of logical motor-driven valve carries out reverse power supply, and the valve rod of three-way electric valve is promoted to rotate counterclockwise, and interface two closes
It closes, interface three and interface one are interconnected, and realize that water supplement port is connected to steam boiler liner；
S2, the SW that starts switch for disconnecting control system, control system carry out positive confession to the electronic execution position of three-way electric valve
Electricity promotes the valve rod of three-way electric valve to rotate clockwise, and interface three is closed, and interface two and interface one are interconnected, and realizes
Sewage draining exit is connected to steam boiler liner, carries out pressure release with the liner to steam boiler.
8. the pressure release control device of steam boiler according to claim 7, which is characterized in that the specific fortune based on step S1
Steps are as follows for row:
S11, SW closure being started switch, relay K1 obtains electric, the contact 12 of relay contact group K1-1 and the connection of contact eight, after
The contact nine and contact five of appliance contact group K1-2 is connected；The valve rod rotary spacing point minute of limit switch LS1 and three-way electric valve
From, and it is in closed state；The electronic execution position of motor-driven valve obtains electricity operation at this time, starts to rotate counterclockwise three-way electric valve
Valve rod, spool the rotating counterclockwise come down interface two using its valve rod of three-way electric valve, interface three is mutually interconnected with interface one
It is logical, the valve rod rotary spacing point difference of limit switch LS2 and three-way electric valve, and it is in closed state.
9. the pressure release control device of steam boiler according to claim 8, which is characterized in that in the operation shape of step S11
Under state, the valve rod rotary spacing point of three-way electric valve triggers limit switch LS1, so that limit switch LS1 is disconnected, three-way electric valve
Power loss stops working, and the spool of three-way electric valve keeps the position of step S11, and interface two is still closed, interface three and interface one
Still it is interconnected.
10. the pressure release control device of steam boiler according to claim 9, which is characterized in that based on the specific of step S2
Operating procedure is as follows:
S21, SW disconnection, relay K1 power loss being started switch, the contact 12 and contact four of relay contact group K1-1 is connected, after
The contact nine and contact one of appliance contact group K1-2 is connected；The valve rod rotary spacing point minute of limit switch LS2 and three-way electric valve
From, and it is in closed state；Three-way electric valve obtains electricity operation at this time, starts the valve rod for rotating clockwise three-way electric valve, threeway
The spool of motor-driven valve is rotated clockwise using its valve rod come down interface three, and interface two and interface one are interconnected, and limit is opened
It closes LS1 to separate with the valve rod rotary spacing point of three-way electric valve, and is in closed state.
11. the pressure release control device of steam boiler according to claim 10, which is characterized in that in the operation of step S21
Under state, the valve rod rotary spacing point of three-way electric valve triggers limit switch LS2, so that limit switch LS1 is disconnected, electric three-way
Valve power loss stops working, and the spool of three-way electric valve keeps the position of step S21, and interface three is still closed, interface two and interface
One is still interconnected.
12. the pressure release control device of steam boiler according to claim 11, which is characterized in that further include operating procedure such as
Under:
S3, SW closure and steam boiler are started switch when normally generating steam, electro connecting pressure gauge is utilized to monitor steam boiler
Whether liner internal pressure exceeds pressure set points to control the interface one of three-way electric valve and be connected to interface two or and interface
Tee joint,
Or when starting switch SW disconnection and steam boiler stopping generation steam, electro connecting pressure gauge is utilized to monitor steam boiler
Control the interface one of three-way electric valve with the presence or absence of pressure inside liner and be connected to interface two or with interface tee joint.
13. the pressure release control device of steam boiler according to claim 12, which is characterized in that electro connecting pressure gauge monitoring
After steam boiler liner internal pressure exceeds pressure set points, the pressure switch PW on electro connecting pressure gauge is triggered and disconnects,
SW closure is started switch, disconnects the power supply of relay K1 at this time, the contact 12 and contact four of relay contact group K1-1 is connected,
The contact nine and contact one of relay contact group K1-2 is connected, the valve rod rotary spacing point of limit switch LS2 and three-way electric valve
Separation, and it is in closed state；Three-way electric valve obtains electricity operation at this time, starts the valve rod for rotating clockwise three-way electric valve, and three
The spool of logical motor-driven valve is rotated clockwise using its valve rod come down interface three, and interface two and interface one are interconnected, limit
Switch LS1 is separated with the valve rod rotary spacing point of three-way electric valve, and is in closed state.
14. according to the pressure release control device of steam boiler described in claim 7-13, which is characterized in that further include operating procedure
It is as follows:
S4, SW closure and steam boiler are started switch when normally generating steam, disconnects the emergency stop switch ST of control system, controls
System carries out positive power supply to the electronic execution position of three-way electric valve, and the valve rod of three-way electric valve is promoted to rotate clockwise,
Interface three is closed, and interface two and interface one are interconnected, and realizes that sewage draining exit is connected to steam boiler liner, to steam boiler
Liner carry out pressure release.
15. the pressure release control device of steam boiler according to claim 14, which is characterized in that based on the specific of step S4
Operating procedure is as follows:
After S41, emergency stop switch ST are disconnected, the power supply of relay K1, the contact 12 and contact of relay contact group K1-1 are disconnected
Four connect, and the contact nine and contact one of relay contact group K1-2 is connected, and the valve rod of limit switch LS2 and three-way electric valve rotates
Limit point separation, and it is in closed state；Three-way electric valve obtains electricity operation at this time, starts the valve for rotating clockwise three-way electric valve
Bar, spool the rotating clockwise come down interface three using its valve rod of three-way electric valve, interface two and interface one are interconnected,
Limit switch LS1 is separated with the valve rod rotary spacing point of three-way electric valve, and is in closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910683783.0A CN110410769A (en) | 2019-07-26 | 2019-07-26 | The pressure release control device and its control method of steam boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910683783.0A CN110410769A (en) | 2019-07-26 | 2019-07-26 | The pressure release control device and its control method of steam boiler |
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| CN110410769A true CN110410769A (en) | 2019-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910683783.0A Pending CN110410769A (en) | 2019-07-26 | 2019-07-26 | The pressure release control device and its control method of steam boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230210333A1 (en) * | 2021-12-30 | 2023-07-06 | Bissell Inc. | Surface cleaning apparatus with steam delivery |
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|---|---|---|---|---|
| US4007713A (en) * | 1975-08-28 | 1977-02-15 | Hydrolevel Corporation | Test circuit |
| JPS6410003A (en) * | 1987-06-30 | 1989-01-13 | Hinode Kk | Boiler device |
| CN2558827Y (en) * | 2002-06-14 | 2003-07-02 | 东莞市飞达机电配套设备制造有限公司 | Adjustable actuating mechanism of regulating valve |
| CN201875199U (en) * | 2010-11-09 | 2011-06-22 | 中国石油化工股份有限公司 | Three-way reversing valve |
| CN104728822A (en) * | 2015-02-27 | 2015-06-24 | 宁波格林美孚新材料科技有限公司 | Steam generation device with electromagnetic heating function |
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2019
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4007713A (en) * | 1975-08-28 | 1977-02-15 | Hydrolevel Corporation | Test circuit |
| JPS6410003A (en) * | 1987-06-30 | 1989-01-13 | Hinode Kk | Boiler device |
| CN2558827Y (en) * | 2002-06-14 | 2003-07-02 | 东莞市飞达机电配套设备制造有限公司 | Adjustable actuating mechanism of regulating valve |
| CN201875199U (en) * | 2010-11-09 | 2011-06-22 | 中国石油化工股份有限公司 | Three-way reversing valve |
| CN104728822A (en) * | 2015-02-27 | 2015-06-24 | 宁波格林美孚新材料科技有限公司 | Steam generation device with electromagnetic heating function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230210333A1 (en) * | 2021-12-30 | 2023-07-06 | Bissell Inc. | Surface cleaning apparatus with steam delivery |
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