CN109917210A - A kind of Na ion concentration table output current analog device - Google Patents
A kind of Na ion concentration table output current analog device Download PDFInfo
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- CN109917210A CN109917210A CN201910251550.3A CN201910251550A CN109917210A CN 109917210 A CN109917210 A CN 109917210A CN 201910251550 A CN201910251550 A CN 201910251550A CN 109917210 A CN109917210 A CN 109917210A
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- ion concentration
- concentration table
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- current
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- 229910001415 sodium ion Inorganic materials 0.000 title claims abstract description 56
- 238000002955 isolation Methods 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 10
- 238000004088 simulation Methods 0.000 abstract description 4
- 239000011734 sodium Substances 0.000 description 5
- 229910052708 sodium Inorganic materials 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- 230000007257 malfunction Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Safety Devices In Control Systems (AREA)
- Testing And Monitoring For Control Systems (AREA)
Abstract
The invention belongs to a kind of Na ion concentration instrument, a kind of Na ion concentration table output current analog device is specifically disclosed, the device includes cpu controller, programmable current generator, first relay and the second relay, the control terminal of cpu controller and the first relay, the control terminal of second relay connects, the opened point of first relay is connect with the current signal negative terminal of programmable current generator, the opened point of second relay is connect with the current signal anode of programmable current generator, the common end of first relay is connect with the input negative terminal of electromagnetic isolation module, the common end of second relay is connect with the input anode of electromagnetic isolation module.The device of the invention solves the problems, such as that Na ion concentration table must carry out indicating value simulation from engineer station when carrying out preventative and corrective maintenance work or release the logic alternative of interlocking signal, guarantee the reliability and timeliness of temporary changes work, human-equation error is reduced, unit safety in operation is improved.
Description
Technical field
The invention belongs to a kind of Na ion concentration instrument, and in particular to a kind of Na ion concentration table output current analog dress
It sets.
Background technique
Nuclear power station secondary loop Na ion concentration table output current signal (mA) is directly accessed TXP and (operates normally instrument control system
System), signal send master control room to show, instrument itself does not have a signal imitation function, but Na ion concentration table all have alarm or
Interlock acts triggering alarm or interlock device when Na ion concentration is more than limitation definite value.It is supervised as condenser exports
The three pieces of sodium tables synthesis two from three virtual protection for surveying condensed water Na ion concentration interlocks precision processing bypass valve, i.e., when three pieces of sodium tables
In two measured values simultaneously greater than protect limit value when, will trigger interlocking close condensed water precision processing system bypass valve so that
Low plus water level generates fluctuation, influences unit safety operation.
It, must be by TXP system maintenance people when repairing work to Na ion concentration table to prevent interlocking signal malfunction
Member's (this work must have the talent of Special Empower implementable) executes temporary logical change in instrument control engineer station, to sodium ion
Concentration table signal imitation is less than logic limit value or to release interlocking and alarming logic.Current logic alternative implementing method exists
Following problem
Na ion concentration table single unit has 15 pieces, and quantity is more, will monthly carry out preventative maintenance work, ties up the moon
Protect larger workload.The instrument belongs to chemical instruments, poor work stability, and high failure rate needs frequently to carry out corrective dimension
Repair work.
Above work can all cause Na ion concentration expression value to fluctuate, triggering alarm or interlocking movement.Thus give
TXP system maintenance personnel bring a large amount of temporary changes to work, and increase the risk of human-equation error.It is prominent additionally, due to sodium expression value
Become temporary changes also easy to happen not in time, interlocking signal cannot release in time, and equipment malfunction is caused to make, and stablize to unit safety and transport
Row has an adverse effect.
Summary of the invention
The purpose of the present invention is to provideA kind of Na ion concentration table output current analog device, which solvesSodium from
Sub- concentration table must carry out indicating value simulation from engineer station when carrying out preventative and corrective maintenance work or release interlocking
The logic alternative problem of signal guarantees the reliability and timeliness of temporary changes work, reduces human-equation error, improves unit operation
Safety.
Realize the technical solution of the object of the invention: a kind of Na ion concentration table output current analog device, the device include
Cpu controller, programmable current generator, the first relay and the second relay, the control terminal of cpu controller and the first relay
The control terminal connection of device, the second relay, the opened point of the first relay and the current signal of programmable current generator are negative
End connection, the opened point of the second relay are connect with the current signal anode of programmable current generator, the public affairs of the first relay
End is connect with the input negative terminal of electromagnetic isolation module altogether, and the common end of the second relay and the input anode of electromagnetic isolation module connect
It connects.
The normal-closed end of first relay is connect with Na ion concentration table current signal output negative terminal.
The normal-closed end of second relay is connect with Na ion concentration table current signal anode.
The output plus terminal of the electromagnetic isolation module is connect with the input anode for operating normally I&C system.
The output negative terminal of the electromagnetic isolation module is connect with the input negative terminal for operating normally I&C system.
The cpu controller controls the first relay and second actuating of relay, the first relay and the second relay
Normally-closed contact disconnect, cut off the output current signal of Na ion concentration table, while the first relay and the second relay is normal
Closure is prescribed, programmable current generator issues analog signal and enters electromagnetic isolation module through the first relay and the second relay
Input terminal, normal operation I&C system is entered by the output end of electromagnetic isolation module after electromagnetic isolation, thus to sodium ion
The output electric current of concentration table is simulated.
The command reception end of the cpu controller and starting are keyed.
The signal designation end of the cpu controller is connect with analog functuion indicator light.
The start key is pressed, cpu controller is connected to the dummy instruction of start key transmission；While pressing start key,
Analog functuion indicator light is lighted.
The beneficial technical effect of the present invention lies in: the device of the invention is capable of providing to be modeled as from instrument end on the spot by indicating value
Zero or other values function, reduce the logic alternative workload implemented from engineer station, improve the reliability of change and timely
Property, prevent interlock device from malfunctioning.The device is more convenient reliable, promotes unit operating safety factor, this hair of this method conscientiously
Bright device prevents instrument for that in Na ion concentration table maintenance process, can simulate Na ion concentration table output electric current
Indicating value, which transfinites, causes false alarm or interlock device to malfunction.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that a kind of Na ion concentration table provided by the present invention exports current analog device.
In figure: 1 is Na ion concentration table, and 2 be output current analog device, and 3 be cpu controller, and 4 send out for programmable current
Raw device, 5 be the first relay, and 6 be the second relay, and 7 be electromagnetic isolation device, and 8 be analog functuion indicator light, and 9 be start key,
TXP is normal running instrument control system.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of Na ion concentration table provided by the present invention exports current analog device 2, which includes
Cpu controller 3, programmable current generator 4, the first relay 5, the second relay 6, electromagnetic isolation module 7, analog functuion refer to
Show lamp 8 and start key 9.The command reception end of cpu controller 3 is connect with start key 9.The signal designation end of cpu controller 3 and mould
Quasi- functional indicator light 8 connects.The control terminal of CUP controller 3 is connect with the control terminal of the first relay 5, the second relay 6.Sodium
The current signal output negative terminal of ion concentration table 1 is connect with the normal-closed end of the first relay 5, the electric current letter of Na ion concentration table 1
Number anode is connect with the normal-closed end of the second relay 6.The current signal negative terminal of programmable current generator 4 and the first relay
5 opened point connection, the current signal anode of programmable current generator 4 connect with the opened point of the second relay 6, first after
The input negative terminal of the common end access electromagnetic isolation module 7 of electric appliance 5, electromagnetic isolation module 7 is accessed in the common end of the second relay 6
Input anode,The output plus terminal access of electromagnetic isolation module 7 operates normally the input anode of I&C system TXP, electromagnetic isolation The output negative terminal access of module 7 operates normally the input negative terminal of I&C system TXP.
As shown in Figure 1, under normal operating condition, the output electric current anode and output electric current negative terminal point of Na ion concentration table 1
The input terminal for not entering electromagnetic isolation module 7 through the first relay 6 and the second relay 5, by electromagnetic isolation after electromagnetic isolation
7 output end of module is sent into normal operation I&C system TXP and measures display.
As shown in Figure 1, pressing start key 9, CPU when needing to carry out simulated operation to the output signal of Na ion concentration table 1
Controller 3 is connected toWhat start key 9 transmittedDummy instruction, cpu controller 3 control the first relay 5 and the movement of the second relay 6,
The normally-closed contact of first relay 5 and the second relay 6 disconnects, and cuts off Na ion concentrationTable1 output current signal.While the
The opened point of one relay 5 and the second relay 6 closure, programmable current generator 4 issue 4mA analog signal through the first relay
Device 5 and the second relay 6 enter the input terminal of electromagnetic isolation module 7, by the output end of electromagnetic isolation module 7 after electromagnetic isolation
Into operate normally I&C system TXP,To be simulated to the output electric current of Na ion concentration table 1,This analog functuion one
Directly remaining to maintenance work terminates, while pressing start key 9,Analog functuion indicator light 8 is lighted。
As shown in Figure 1, working power of the output current analog device 2 using alternating current 220V, power supply can be dense with sodium ion
Spend the parallel connection of 1 working power upstream of table or individually power supply, it is ensured that do not influence on the work (including stopping power transmission) of Na ion concentration table 1
The work of current analog device.The input of the 4-20mA current output signal access current analog device 2 of Na ion concentration table 1
The output end access at end, current analog device 2 operates normally I&C system TXP, and signal send master control room to show.Na ion concentration table
When 1 normal work, the output electric current of Na ion concentration table 1 is directly fed to operate normally I&C system by current analog device 2
TXP shows the real value of Na ion concentration table 1 in master control room.
As shown in Figure 1, when needing to work to Na ion concentration table 1: pressing above output current analog device 2
Start key 9, current analog device 2 is always maintained at current analog function after pressing 9 function key of start key, even if after powering off power transmission again
The function is also always maintained at, and output current analog device 2 will cut off the normal current output signal of Na ion concentration table 1, simultaneously
The DC current signal of current analog device 2 simulation output 4mA itself is exported, that is, is givenOperate normally I&C systemTXP system
The signal that system simulation Na ion concentration is zero, and be always maintained at, it is ensured that alarm or interlocking signal are failure to actuate, until maintenance work
Terminate.When 1 indicating value of Na ion concentration table restores normal, the start key 9 above output current analog device 2, solution are pressed again
Except analog signal, restore the normal output of Na ion concentration table 1.
The signal mode for operating normally I&C system TXP maintenance personnel and carrying out in engineer station can be substituted by aforesaid operations
Quasi- or logic alternative work, so that instrument indication value causes to report by mistake extremely when avoiding carrying out maintenance work to Na ion concentration table 1
The malfunction of alert or interlock device.
The present invention is explained in detail above in conjunction with drawings and examples, but the present invention is not limited to above-mentioned implementations
Example, within the knowledge of a person skilled in the art, can also make without departing from the purpose of the present invention
Various change out.The content being not described in detail in the present invention can use the prior art.
Claims (9)
1. a kind of Na ion concentration table exports current analog device, feature exists: the device includes cpu controller (3), may be programmed
Current feedback circuit (4), the first relay (5) and the second relay (6), the control terminal and the first relay of cpu controller (3)
(5), the control terminal connection of the second relay (6), opened point and programmable current generator (4) of (5) of the first relay
The connection of current signal negative terminal, the opened point of the second relay (6) and the current signal anode of programmable current generator (4) connect
It connects, the common end of the first relay (5) is connect with the input negative terminal of electromagnetic isolation module (7), the common end of the second relay (6)
It is connect with the input anode of electromagnetic isolation module (7).
2. a kind of Na ion concentration table according to claim 1 exports current analog device, feature exists: described first
The normal-closed end of relay (5) is connect with the current signal of Na ion concentration table (1) output negative terminal.
3. a kind of Na ion concentration table according to claim 2 exports current analog device, feature exists: described second
The normal-closed end of relay (6) is connect with the current signal anode of Na ion concentration table (1).
4. a kind of Na ion concentration table according to claim 3 exports current analog device, feature exists: the electromagnetism
The output plus terminal of isolation module (7) is connect with the input anode for operating normally I&C system (TXP).
5. a kind of Na ion concentration table according to claim 4 exports current analog device, feature exists: the electromagnetism
The output negative terminal of isolation module (7) is connect with the input negative terminal for operating normally I&C system (TXP).
6. a kind of Na ion concentration table according to claim 5 exports current analog device, feature exists: the CPU
Controller (3) control the first relay (5) and the second relay (6) movement, the first relay (5) and the second relay (6)
Normally-closed contact disconnects, and cuts off the output current signal of Na ion concentration table (1), while the first relay (5) and the second relay
(6) opened point closure, programmable current generator (4) issue analog signal through the first relay (5) and the second relay (6)
Into the input terminal of electromagnetic isolation module (7), normal operation is entered by the output end of electromagnetic isolation module (7) after electromagnetic isolation
I&C system (TXP), to be simulated to the output electric current of Na ion concentration table (1).
7. a kind of Na ion concentration table according to claim 6 exports current analog device, feature exists: the CPU
The command reception end of controller (3) is connect with start key (9).
8. a kind of Na ion concentration table according to claim 7 exports current analog device, feature exists: the CPU
The signal designation end of controller (3) is connect with analog functuion indicator light (8).
9. a kind of Na ion concentration table according to claim 8 exports current analog device, feature exists: described in pressing
Start key (9), cpu controller (3) are connected to the dummy instruction of start key (9) transmission；While pressing start key (9), function is simulated
Energy indicator light (8) is lighted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910251550.3A CN109917210B (en) | 2019-03-29 | 2019-03-29 | Output current simulator of sodium ion concentration meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910251550.3A CN109917210B (en) | 2019-03-29 | 2019-03-29 | Output current simulator of sodium ion concentration meter |
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| Publication Number | Publication Date |
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| CN109917210A true CN109917210A (en) | 2019-06-21 |
| CN109917210B CN109917210B (en) | 2023-11-14 |
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