CN202150056U - Pressure monitoring device - Google Patents
Pressure monitoring device Download PDFInfo
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- CN202150056U CN202150056U CN201120273115U CN201120273115U CN202150056U CN 202150056 U CN202150056 U CN 202150056U CN 201120273115 U CN201120273115 U CN 201120273115U CN 201120273115 U CN201120273115 U CN 201120273115U CN 202150056 U CN202150056 U CN 202150056U
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- pressure
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- monitoring device
- protection
- pressure monitoring
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Abstract
The utility model discloses a pressure monitoring device capable of reducing main equipment protection misoperations. The pressure monitoring device comprises a pressure transmitter, a display, a caution trigger, a protection trigger, and three pressure switches, wherein a pressure signal output from a pressure monitoring point is sent to the pressure transmitter and the three pressure switches respectively, the three pressure switches are in parallel connection at a parallel connection point after being serially connected in a pairwise manner, the parallel connection point is in series connection with the protection trigger, and the output end of the pressure transmitter is connected with the display and the caution trigger respectively. The pressure monitoring device employs less equipment investment but eliminates most of unwanted equipment halt and production halt accidents caused by pressure signal distortion, reduces loss caused by production halt and production recovery greatly, guarantees the safety of main equipment and technology, is in favor of continuous production, and can be widely used in the field relating to the automatic control of pressure signals.
Description
Technical field
The utility model relates to automation field, especially a kind of pressure monitoring device.
Background technology
At present; Process equipment mainly relies on the detection of appearance control parameter to judge main equipment or technology, and whether safety is controlled; The signal of appearance control detecting element collection generally includes temperature signal, pressure signal and tach signal etc.; These signals are transfused to the control system of main equipment, produce the control action of tackling main equipment or technology mutually by control system according to the interlock logic that is provided with in advance.When parameter just often, produce and normally to carry out; When parameter exceeded alarming value, main equipment was shut down or technology is interrupted automatically, thereby reached the purpose that safety stops production, and prevented the generation of accident.Therefore, appearance control detecting element plays crucial effects to the reliability of parameter detecting to safety, the quality of main equipment or technology.
Because factors such as the quality of detecting element itself, the interference of site environment, vibration, dust all can cause detected parameters unreliable; Problems such as distorted signals; Often occur the fault erroneous judgement of appearance control detecting element is main equipment or the in-problem situation of technology; Cause main equipment protection misoperation and cause producing interruption, bring unnecessary economic loss.
The station that carries out pressure monitoring for needs in the existing equipment adopts the mode of setting pressure transmitter usually; The signal of pressure unit is delivered to the protection trigger in display, caution trigger and the main equipment control system simultaneously; Display shows force value; The caution trigger sends caution when pressure exceeds normal range, remind the staff to note pressure monitor and adjustment, and the protection trigger then moves when pressure exceeds alarming value; Let main equipment shutdown or technology interrupt automatically, produce, avoid accident with protection.
The characteristics of above-mentioned pressure monitoring device are that the signal of pressure unit passes out to the protection trigger in caution trigger and the main equipment control system simultaneously, if pressure unit itself has fault, then can cause the mistakenly stop machine operation, thereby bring production loss.
The utility model content
Protect the deficiency of misoperation in order to overcome in the existing main equipment control system because the fault of pressure detecting element own causes main equipment, the utility model technical matters to be solved provides a kind of pressure monitoring device that can reduce main equipment protection misoperation.
The utility model solves the technical scheme that its technical matters adopted: pressure monitoring device; Comprise pressure unit, display, caution trigger and protection trigger; Also comprise three pressure switches; Pressure signal by pressure monitoring point output is sent into pressure unit and three pressure switches respectively; These three pressure switches connect in twos the back and the interface place be connected in parallel, said and interface is connected with the protection trigger, the output terminal of pressure unit respectively with display with warn trigger and be connected.
The beneficial effect of the utility model is: got rid of unnecessary shutdown, stopping production accident that the overwhelming majority causes because of the pressure signal distortion with the less equipment input; Practice thrift a large amount of because of stopping production and reproducing the loss that causes; Guarantee the safety of main equipment and technology, helped continuous production.The utility model can widespread use in relating to the automation field of pressure signal.
Description of drawings
Fig. 1 is existing pressure monitoring device synoptic diagram.
Fig. 2 is the synoptic diagram of the pressure monitoring device of the utility model.
Be labeled as 1-first pressure switch, 2-second pressure switch, 3-the 3rd pressure switch among the figure; The 4-pressure unit, the 5-display, 6-warns trigger, and 7-protects trigger; 8-first is non-logical-arithmetic unit, and 9-second is non-logical-arithmetic unit, 10-pressure monitoring point, K-and interface.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
As shown in Figure 1, the existing pressure signal that sends by pressure monitoring point 10 via pressure unit 4 after, be sent to display the 5, the firstth respectively, the non-logical-arithmetic unit 8 and the second NOT logic arithmetical unit 9, display 5 shows pressure values; The firstth, non-logical-arithmetic unit 8 carries out the logical operation of " whether exceeding normal range ", and its output terminal is connected with caution trigger 6, and caution trigger 6 gives the alarm when the result is " being ", points out pressure anomaly; The second NOT logic arithmetical unit 9 carries out the logical operation of " whether surpass alarming value ", and its output terminal is connected with protection trigger 7 in the main equipment control system, the result during for " being " 7 startups of protection trigger the protection of main equipment is operated.In case pressure unit 4 faults must cause the protection maloperation of main equipment, cause unnecessary loss.
Long-term observation according to the inventor; Pressure parameter possibly alter a great deal; Damages for fear of pressure detecting element such as pressure unit 4 itself cause the main frame misoperation, and what expect easily usually is to utilize a plurality of pressure elementss to detect the method for same parameter, if the detected force value of majority element wherein is close; Think that then this force value is real force value; And wherein the minority element testing to force value depart from far, think that then this minority element has damaged, because it has been generally acknowledged that the probability that a plurality of elements damage simultaneously can be less than the probability of smaller amounts component wear.But above-mentioned conventional means has a defective, and the volume that is exactly pressure unit itself is bigger, takies when mounted than large space, and practical application is difficulty comparatively.
Also can consider to utilize single pressure switch to realize reporting to the police, if but this pressure switch itself break down, still can cause the protection maloperation of main frame.
The main equipment misoperation problem that the utility model has adopted following scheme to avoid as possible the pressure signal distortion to cause.
As shown in Figure 2; The pressure monitoring device of the utility model comprises pressure unit 4, display 5, caution trigger 6 and protection trigger 7; Also comprise three pressure switches; Pressure signal by pressure monitoring point 10 output is sent into pressure unit 4 and three pressure switches respectively, these three pressure switches connect in twos the back and interface K place be connected in parallel, said and interface K connects with protecting trigger 7.In the scheme of the utility model, the output terminal of pressure unit 4 is that non-logical-arithmetic unit 8 is connected with display 5 and first respectively still, and display 5 shows pressure value; The firstth, non-logical-arithmetic unit 8 carries out the logical operation of " whether exceeding normal range "; Its output terminal is connected with caution trigger 6; Caution trigger 6 gives the alarm when the result is " being ", points out pressure anomaly, and this is identical with prior art; But whether start Host Protection operation then use pressure switch instead and control, these three pressure switches i.e. first pressure switch 1, second pressure switch 2, the 3rd pressure switch 3 all are set at when pressure exceeds alarming value closed.Its steering logic is: when two or three pressure switches actions are arranged in first pressure switch 1, second pressure switch 2, the 3rd pressure switch 3 simultaneously, think that just pressure really exceeds alarming value; Protection trigger 7 just can send alerting signal to the main equipment control system, and causes the corresponding protection operation.
Embodiment:
One pressure normally operates in 12MPa, and just to be regarded as technology operation dangerous when pressure is lower than 9MPa, needs emergency stop or stops to produce.Use the utility model at this pressure monitoring point, be illustrated in figure 2 as it pressure unit and three pressure switches are installed,, these three pressure switches connect in twos the back and interface K place be connected in parallel, said and interface K connects with protecting trigger 7.Pressure unit is only made parameter and is kept watch on usefulness, and just as the monitoring of technology protection action, pressure switch is set at less than 9MPa and moves pressure switch; When any two pressure switches action; Just be regarded as its technological parameter and be lower than 9MPa really, will protect trigger 7 to trigger, realize emergency stop or stop production.Because the possibility that two switches break down simultaneously in three pressure switches is very little, this scheme can be got rid of the distorted signals that causes because of the fault of single pressure switch own to a great extent, reduces the Host Protection misoperation.
Claims (1)
1. pressure monitoring device; Comprise pressure unit (4), display (5), caution trigger (6) and protection trigger (7); It is characterized in that: also comprise three pressure switches (1,2,3); Pressure signal by pressure monitoring point (10) output is sent into pressure unit (4) and three pressure switches (1,2,3) respectively; These three pressure switches (1,2,3) connect in twos the back and interface (K) locate to be connected in parallel, said and interface (K) is connected with protection trigger (7), the output terminal of pressure unit (4) respectively with display (5) with warn trigger (6) and be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120273115U CN202150056U (en) | 2011-07-29 | 2011-07-29 | Pressure monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120273115U CN202150056U (en) | 2011-07-29 | 2011-07-29 | Pressure monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202150056U true CN202150056U (en) | 2012-02-22 |
Family
ID=45591109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120273115U Expired - Fee Related CN202150056U (en) | 2011-07-29 | 2011-07-29 | Pressure monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202150056U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927027A (en) * | 2012-08-01 | 2013-02-13 | 北京首钢自动化信息技术有限公司 | Reverse flow protective method for blast furnace blower |
| CN111522370A (en) * | 2020-04-30 | 2020-08-11 | 攀钢集团西昌钢钒有限公司 | Tank constant pressure control system |
-
2011
- 2011-07-29 CN CN201120273115U patent/CN202150056U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927027A (en) * | 2012-08-01 | 2013-02-13 | 北京首钢自动化信息技术有限公司 | Reverse flow protective method for blast furnace blower |
| CN111522370A (en) * | 2020-04-30 | 2020-08-11 | 攀钢集团西昌钢钒有限公司 | Tank constant pressure control system |
| CN111522370B (en) * | 2020-04-30 | 2022-07-19 | 攀钢集团西昌钢钒有限公司 | Constant-pressure control system for tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120222 Termination date: 20140729 |
|
| EXPY | Termination of patent right or utility model |