CN208443050U - A kind of control system of conduction oil reflux - Google Patents
A kind of control system of conduction oil reflux Download PDFInfo
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- CN208443050U CN208443050U CN201820892729.8U CN201820892729U CN208443050U CN 208443050 U CN208443050 U CN 208443050U CN 201820892729 U CN201820892729 U CN 201820892729U CN 208443050 U CN208443050 U CN 208443050U
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Abstract
The utility model discloses a kind of control systems of conduction oil reflux, boiler including being perfused with conduction oil, the oil outlet of boiler is communicated with flowline, the oil inlet of boiler is connected with oil inlet pipe, and flowline and oil inlet pipe are located at the both ends for heating article, are provided with oil pump on oil inlet pipe, setting detects the flowmeter of heat transfer oil flow in the unit time on the flowline, flowmeter output detection signal, is provided with part flow arrangement, the flowmeter is coupled with control circuit between oil inlet pipe and flowline；Have the advantages that controlling heat-conducting oil system internal circulating load is higher than minimum discharge.
Description
Technical field
The utility model relates to field of boilers, in particular to a kind of control system of conduction oil reflux.
Background technique
The oil outlet of boiler is communicated with flowline, and the oil inlet of boiler is connected with oil inlet pipe, flowline and oil inlet pipe difference
Positioned at the both ends for heating article, it is provided with oil pump on oil inlet pipe, the conduction oil in boiler is entered into generation heating by flowline
Object is coming back to boiler by oil inlet pipe.
But when heat transfer oil flow requires limitation lower than boiler system operation minimum operation, unit mass conduction oil is made to be situated between
Matter is flowing through the lengthening of boiler time, therefore generates outlet oil temperature superelevation or the conduction oil thermo-field thoery in burner hearth, keeps conduction oil old
Change failure, reduce heat transfer efficiency, reduces conduction oil and use the time.
Therefore it needs through the means such as control guarantee heat-conducting oil system internal circulating load higher than minimum discharge requirement, and in control
When solving blowing out, influence of the hearth waste heat to thermally conductive oil quality.
Utility model content
The purpose of the utility model is to provide a kind of control systems of conduction oil reflux, have control heat-conducting oil system circulation
Amount is higher than the advantages of minimum discharge.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of control system of conduction oil reflux, the boiler including being perfused with conduction oil, the oil outlet of boiler are communicated with out
Oil pipe, the oil inlet of boiler are connected with oil inlet pipe, and flowline and oil inlet pipe are located at the both ends for heating article, on oil inlet pipe
It is provided with oil pump, setting detects the flowmeter of heat transfer oil flow in the unit time, flowmeter output detection letter on the flowline
Number, part flow arrangement is provided between oil inlet pipe and flowline, the flowmeter is coupled with control circuit.
Using the above scheme, under original state, part flow arrangement closes isocon, and flowmeter is arranged on flowline, measures
Conduction oil passes through the flow of flowmeter in unit time, and control circuit receives the detection signal of flowmeter output, when detection signal
When less than threshold value, control circuit output control signal is led to fuel-displaced tube portion for heating article with controlling part flow arrangement opening
Conduction oil introduce part flow arrangement and so that part conduction oil is required no for heating article directly return to boiler from oil inlet pipe, add
The back-flow velocity of fast conduction oil, accelerates the flow velocity of conduction oil in oil inlet pipe, and thermally conductive oil medium is avoided to flow through the lengthening of boiler time
And conduction oil ageing failure occurs, to influence heat transfer efficiency.
Preferably, the control circuit includes:
Comparing unit, input terminal are coupled to flowmeter, receive detection signal, will test signal be compared with threshold value with
Export comparison signal；
Control unit, input terminal are coupled to the output end of comparing unit, receive comparison signal, output control signal is to control
Part flow arrangement opening and closing processed.
Further, the control circuit further includes delay unit, and delay unit is coupled to comparing unit and control unit
Between, delay unit receives comparison signal and exports postpones signal.
Using the above scheme, comparing unit receives detection signal, will test compared with signal and threshold value be compared with output
Signal, delay unit receive comparison signal, and when detecting signal less than threshold value, comparing unit receives low level, in default delay
In time, delay unit persistently receives low level, and delay unit exports high level, and control unit receives high level output control letter
Number with control part flow arrangement opening, flowline is shunted, the back-flow velocity of conduction oil is accelerated.
Preferably, the part flow arrangement includes triple valve, and the import of triple valve is set on flowline, the import of triple valve
Towards the oil outlet of boiler, the one outlet of triple valve towards being connected for heating article and with flowline, triple valve another
Outlet is connected with isocon, and isocon is communicated far from one end of triple valve with oil inlet pipe.
Using the above scheme, when the flow in flowline is greater than threshold value, triple valve will shunt duct occlusion, and flowline is led
Logical, when the flow in flowline is less than threshold value, for triple valve by fuel-displaced duct occlusion, isocon conducting will be thermally conductive in flowline
Oil is all flowed into boiler by isocon, accelerates the reflux rate of conduction oil, thermally conductive oil medium is avoided to flow through the boiler time
It lengthens and conduction oil ageing failure occurs.
Preferably, part flow arrangement includes the isocon being set between flowline and oil inlet pipe, is provided on isocon double
Port valve.
Using the above scheme, when two-way valve is opened, isocon conducting is shunted flowline, a part of conduction oil
It continues as being heated for heating article, another part directly passes through isocon and is back in boiler, economical and practical.
Preferably, master control valve is provided on the flowline.
Preferably, the oil outlet is located at the upper end of boiler, and oil inlet is located at the lower end of boiler.
In conclusion the utility model has the following beneficial effects: when flowmeter detects that the flow in flowline is less than
When threshold value, part flow arrangement isocon is controlled by control circuit and is opened, the reflux of conduction oil is accelerated.
Detailed description of the invention
Fig. 1 is the structural block diagram of embodiment one；
Fig. 2 is the circuit block diagram of control circuit in embodiment one
Fig. 3 is the circuit diagram in embodiment one in control unit；
The circuit diagram of unit when Fig. 4 is comparing unit in embodiment one, delay unit and control；
Fig. 5 is the structural block diagram of embodiment two.
In figure, 1, boiler；2, flowline；3, oil inlet pipe；4, oil pump；5, flowmeter；6, master control valve；71, two-way valve；
72, triple valve；73, electric control valve；74, isocon；8, control circuit；81, delay unit；82, unit when controlling；83, control is single
Member；84, comparing unit.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
In the description of the present invention, it should be understood that the orientation of the instructions such as term " on ", "lower", "left", "right"
Or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model and simplification is retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it should not be understood as limiting the present invention.
Embodiment 1: a kind of control system of conduction oil reflux, as shown in Figure 1, being perfused with and leading in boiler 1 including boiler 1
Hot oil, boiler 1 are provided with oil outlet and oil inlet, and oil outlet is located at the upper end of boiler 1, and oil inlet is located at the lower end of boiler 1.Out
Hydraulic fluid port is communicated with flowline 2, and master control valve 6 is provided on flowline 2, and oil inlet is connected with oil inlet pipe 3.Flowline 2 and oil inlet
Pipe 3 is located at the both ends for heating article.Oil pump 4 is provided on oil inlet pipe 3.
Flowmeter 5 is provided on flowline 2, flowmeter 5 is used to detect in the unit time, passes through 2 conduction oil of flowline
Flow, the output detection signal of flowmeter 5.Part flow arrangement is provided between oil inlet pipe 3 and flowline 2, part flow arrangement includes setting
Isocon 74 between oil inlet pipe 3 and flowline 4, isocon 74 shunt between flowmeter 5 and the oil outlet of boiler 1
It is provided with two-way valve 71 on pipe 74, electric control valve 73 is provided on two-way valve 71, by the control rotation of electric control valve 73 to realize
Two-way valve 71 switchs.
It is compared with threshold value, as shown in Fig. 2, flowmeter 5 is coupled with reception detection signal and will test signal with output
Control signal is to control the control circuit 8 that electric control valve 73 opens and closes.
Control circuit 8 includes control unit 83 and comparing unit 84.
As shown in Figures 2 and 3, control unit 83 includes relay K1, relay K2, time relay KT, two-way brilliant lock
Pipe VT, delay unit 81.
Comparing unit 84 includes comparator A1, resistance R1, resistance R2.
The normally opened contact K1-1 of relay K1 is serially connected with the power circuit of the rotating forward of electric control valve 73, the normally opened touching of relay K2
Point K2-1 is serially connected with the power circuit of the reversion of electric control valve 73.
Step-down transformer T is coupled on alternating current, the primary side of step-down transformer T is connected on alternating current, step-down transformer T
Secondary side be connected with rectifier bridge UR, step-down transformer T is used to be converted in the alternating current of 220V the alternating current of 12V, by whole
It flows bridge UR and the direct current of 12V is provided, filter capacitor C3 is connected on the output end of rectifier bridge UR.The coil of relay K1 couples
In the both ends of rectifier bridge UR, the coil of relay K2 and the coils from parallel connection of coils of relay K1.The power-off delay of time relay KT touches
Point KT-1 is serially connected with the power circuit of relay K1 coil, and the original state of power-off delay contact KT-1 is closure, time relay
The power-off delay contact KT-2 of device KT is serially connected with the power circuit of relay K2 coil, and power-off delay contact KT-2 original state is
It disconnects.The normally-closed contact K2-2 of relay K2 is serially connected with the power circuit of relay K1 coil.Bidirectional thyristor VT's is serially connected with
The power circuit of relay K2 coil.
As shown in figure 4, unit 82 when the triggering end of bidirectional thyristor VT is coupled with control, the input terminal coupling of unit 82 when control
In the output end of delay unit 81, the input terminal of delay unit 81 is coupled to the output end of comparator A1, the positive of comparator A1
End is coupled to flowmeter 5, and the reverse side of comparator A1 is coupled to one end of resistance R1, other end coupling and the VCC electricity of resistance R1
Source, one end of the tie point coupling and resistance R2 of resistance R1 and VCC power supply, the other end ground connection of resistance R2.Therefore resistance R1
Voltage value is the threshold value of comparator A1.
Delay unit 81 includes 555 delayers, and 4 feet of 555 delayers are coupled to the output end of comparator A1；555 delays
8 feet of device are coupled with VCC power supply；The tie point of 2 feet of 555 delayers and the coupling of 6 feet, 2 feet and 6 feet is coupled with resistance R3, electricity
R3 ground connection is hindered, the both ends of resistance R3 are parallel with diode D1, and the cathode of the plus earth of diode D1, diode D1 is coupled to 2
The tie point of the tie point of foot and 6 feet, 2 feet and 6 feet is coupled with capacitor C1, and capacitor C1 is coupled to VCC power supply；555 delayer, 1 foot
Ground connection；555 delayer, 5 foot is coupled with capacitor C2, capacitor C2 ground connection；The input of unit 82 when 3 feet of 555 delayers are coupled to control
End.
When control unit 82 include with door, delayer A2, NOT gate, the input terminal of NOT gate is coupled to 3 feet of 555 delayers, non-
The output end of door is coupled to the input terminal of delayer A2, and the output end of delayer A2 is coupled to an input terminal with door, with door
Another input terminal be coupled to the tie points of 555 delayer NAND gates.
Use process:
When threshold value (i.e. flow be greater than) powers on first under normal circumstances, and the triggering end of bidirectional thyristor VT is not at this time
The coil of conducting, relay K2 must not electricity, normally-closed contact K2-2 closure, the coil of relay K1 and the coil of time relay KT
Electric, power-off delay contact KT-2 closure, the normally opened contact K1-1 closure of control relay K1 are obtained, electric control valve 73 rotates forward, will divide
Flow tube 74 is closed, and after electric control valve 73 is completely enclosed by isocon 74, just reach time relay KT first default prolongs
Slow time, power-off delay contact KT-1 are disconnected.
Comparing unit 84 receives the detection signal that flowmeter 5 issues, and will test signal and is compared with threshold value to export ratio
Compared with signal, delay unit 81 receives comparison signal, and when detecting signal less than threshold value, comparing unit 84 receives low level, pre-
If persistently receiving low level in delay time, high level is exported, unit 82 exports high level in predetermined time delay when control,
Bidirectional thyristor VT conducting, the coil conducting of relay K2, the second normally-closed contact K2-2 are disconnected, and the power-off of time relay KT is prolonged
Slow contact KT-2 is closed in predetermined time delay, and the normally opened contact K2-1 closure of relay K2, controls electric control valve 73
Reversion, two-way valve 71 is opened, is shunted to flowline 2, and boiler 1 accelerates the oil return rate of conduction oil.
Embodiment 2: as shown in figure 5, difference from example 1 is that, part flow arrangement includes triple valve 72, triple valve
In 72 import setting and flowline 2, oil outlet of the import of triple valve 72 towards boiler 1, the one outlet court of triple valve 72
It is connected to for heating article and with flowline 2, another outlet of triple valve 72 is connected with isocon 74.It is also set on triple valve 72
It is equipped with electric control valve 73.
When the flow in flowline 2 is greater than threshold value, triple valve 72 closes isocon 74, and flowline 2 is connected, when fuel-displaced
When flow in pipe 2 is less than threshold value, triple valve 72 closes flowline 2, and isocon 74 is connected, by the conduction oil in flowline 2
It is all flowed into boiler 1 by isocon 74, accelerates the reflux rate of conduction oil, avoid thermally conductive oil medium when flowing through boiler 1
Between lengthen and conduction oil ageing failure occur.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as within the protection scope of the present utility model all by the protection of Patent Law.
Claims (7)
1. a kind of control system of conduction oil reflux, the boiler (1) including being perfused with conduction oil, the oil outlet connection of boiler (1)
Have flowline (2), the oil inlet of boiler (1) is connected with oil inlet pipe (3), and flowline (2) and oil inlet pipe (3) are located at generation heating
The both ends of object are provided with oil pump (4) on oil inlet pipe (3), it is characterized in that: the setting detection unit time on the flowline (2)
The flowmeter (5) of interior heat transfer oil flow, flowmeter (5) output detection signal, is provided between oil inlet pipe (3) and flowline (2)
Part flow arrangement, the flowmeter (5) are coupled with control circuit (8).
2. the control system of a kind of conduction oil reflux according to claim 1, it is characterized in that: the control circuit (8) is wrapped
It includes:
Comparing unit (84), input terminal are coupled to flowmeter (5), are received detection signal, be will test signal and compared with threshold value
Compared with to export comparison signal；
Control unit (83), input terminal are coupled to the output end of comparing unit (84), receive comparison signal, output control signal
To control electrically operated valve opening and closing.
3. the control system of a kind of conduction oil reflux according to claim 2, it is characterized in that: the control circuit (8) is also
Including delay cell, delay cell is coupled between comparing unit (84) and control unit (83), and letter is compared in delay cell reception
Number and export postpones signal.
4. the control system of a kind of conduction oil reflux according to claim 1, it is characterized in that: the part flow arrangement includes three
Port valve (72), the import of triple valve (72) are set on flowline (2), and the import of triple valve (72) is towards the fuel-displaced of boiler (1)
Mouthful, towards being connected for heating article and with flowline (2), another of triple valve (72) exports the one outlet of triple valve (72)
It is connected with isocon (74), isocon (74) is communicated far from the one end of triple valve (72) with oil inlet pipe (3).
5. the control system of a kind of conduction oil reflux according to claim 1, it is characterized in that: part flow arrangement includes being set to
Isocon (74) between flowline (2) and oil inlet pipe (3) is provided with two-way valve (71) on isocon (74).
6. the control system of a kind of conduction oil reflux according to claim 1, it is characterized in that: being set on the flowline (2)
It is equipped with master control valve (6).
7. the control system of a kind of conduction oil reflux according to claim 1, it is characterized in that: the oil outlet is located at boiler
(1) upper end, oil inlet are located at the lower end of boiler (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820892729.8U CN208443050U (en) | 2018-06-09 | 2018-06-09 | A kind of control system of conduction oil reflux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820892729.8U CN208443050U (en) | 2018-06-09 | 2018-06-09 | A kind of control system of conduction oil reflux |
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| Publication Number | Publication Date |
|---|---|
| CN208443050U true CN208443050U (en) | 2019-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820892729.8U Active CN208443050U (en) | 2018-06-09 | 2018-06-09 | A kind of control system of conduction oil reflux |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013401A (en) * | 2022-05-31 | 2022-09-06 | 三一重能股份有限公司 | Abnormal movement prevention protection system and method for moving pin, moving pin device and wind driven generator |
-
2018
- 2018-06-09 CN CN201820892729.8U patent/CN208443050U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013401A (en) * | 2022-05-31 | 2022-09-06 | 三一重能股份有限公司 | Abnormal movement prevention protection system and method for moving pin, moving pin device and wind driven generator |
| CN115013401B (en) * | 2022-05-31 | 2024-06-04 | 三一重能股份有限公司 | Movable pin anti-abnormal movement protection system and method, movable pin device and wind turbine |
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