CN202479057U - Nitrogen protection device for centrifugal machine - Google Patents
Nitrogen protection device for centrifugal machine Download PDFInfo
- Publication number
- CN202479057U CN202479057U CN2012200656303U CN201220065630U CN202479057U CN 202479057 U CN202479057 U CN 202479057U CN 2012200656303 U CN2012200656303 U CN 2012200656303U CN 201220065630 U CN201220065630 U CN 201220065630U CN 202479057 U CN202479057 U CN 202479057U
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- centrifuge
- plc
- protection device
- nitrogen protection
- reducing valve
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Abstract
The utility model relates to a nitrogen protection device for a centrifugal machine. The nitrogen protection device comprises a programmed logic controller (PLC), an air intake pipeline A and an air outtake pipeline B, wherein the air intake pipeline is sequentially connected with a nitrogen source (3), a first safety valve (5), a first filter (6), a first pressure reducing valve (7) and the centrifugal machine (9); a signal control end of the first pressure reducing valve (7) is correspondingly connected with the PLC; the air outtake pipeline is sequentially connected with the centrifugal machine (9), a second filter (10), a flowmeter (11), a gas sensor (12) and an exhaust pump (13); and signal control ends of the exhaust pump (13) and the gas sensor (12) are respectively and correspondingly connected with the PLC. The nitrogen protection device has the advantages that the oxygen content in the centrifugal machine can be subject to real-time on-line monitoring and control, so that the density of the flammable and explosive gas in the centrifugal machine is reduced; functions of starting/closing and stop brake of a motor of the centrifugal machine are controlled by a frequency converter; and therefore, the nitrogen protection device has the characteristics of high automation degree, accuracy in control, security and high efficiency.
Description
Technical field
The utility model relates to the protective device that contains explosion hazard gases in a kind of container, particularly a kind of centrifuge nitrogen protection device.
Background technology
Centrifuge is quite extensive in commercial Application such as chemical fertilizer, chemical industry, oil refining, pharmacy, food and national defence; The handled material variety of centrifuge is various; And many be inflammable and explosive because centrifuge seals in the course of the work, this just is prone to cause the combustion explosion accident.In order to address the above problem, the scheme that adopts usually is that an amount of nitrogen (nitrogen commonly used) is fed in the centrifuge, through reducing the concentration of explosion hazard gases, reaches the purpose of avoiding centrifuge generation combustion explosion.Owing to only adopt pipeline that nitrogen is directly fed centrifuge at present; The opportunity of leaning on operating personnel manually to control to feed nitrogen, and nitrogen quantity; In the centrifuge course of work, there are some unforeseen factors; Explosion hazard gases just exceeds standard before starting like centrifuge, explosion hazard gases exceeds standard etc. in the course of work, and operating personnel can't learn.
The utility model content
The purpose of the utility model is exactly wayward for the nitrogen amount that solves existing centrifuge feeding, as to be prone to cause combustion explosion accident shortcoming, a kind of centrifuge nitrogen protection device of proposition.
To achieve these goals, the utility model has adopted following technical scheme:
The centrifuge nitrogen protection device is characterized in that comprising PLC, air inlet pipeline and outlet pipe;
Air inlet pipeline one end connects source nitrogen, the other end connects centrifuge, is connected with first safety valve, first filter, first pressure-reducing valve in the air inlet pipeline successively, the corresponding connection with PLC of the signal controlling end of first pressure-reducing valve; Outlet pipe one end connects centrifuge, the other end connects exhaust pump, connects second filter, flowmeter and gas sensor in the outlet pipe successively, corresponding with the PLC respectively connection of the signal controlling end of exhaust pump and gas sensor; Other is provided with display and hand switch, corresponding with the PLC respectively connection of their signal controlling end.Said display and hand switch also can adopt touch-screen to replace then corresponding with the PLC connection of the signal controlling end of touch-screen.
Said PLC (Programmable Logic Controller) is a programmable logic controller (PLC), belongs to the known technology field.Said gas sensor can adopt lambda sensor, belongs to known technology.
On the basis of technique scheme, following further technical scheme can also be arranged:
The first pressure-reducing valve two ends are parallel with second pressure-reducing valve in the air inlet pipeline, the corresponding connection with PLC of the signal controlling end of second pressure-reducing valve.Also be connected with the hand guiding valve in the air inlet pipeline before first pressure-reducing valve, the first pressure-reducing valve both sides are respectively equipped with air gauge S in the air inlet pipeline.
The advantage of the utility model is:
Can be according to oxygen content in the on-line measurement centrifuge; Through the gas displacement principle; With gas in the nitrogen replacement centrifuge, reduce the interior flammable explosive gas concentration of centrifuge and water down concentration of oxygen in the centrifuge, be in a safe condition when reaching the work of control centrifuge.Native system possesses slow/quick two grades of operation centrifuges and stops brake function also through Frequency Converter Control centrifuge motor, when the operative employee stops by stop button or centrifuge automatically, stops fast through the centrifugal function of frequency converter.
Description of drawings:
Fig. 1 is the structure principle chart of the utility model.
Concrete aforesaid way
A kind of centrifuge nitrogen protection device as shown in Figure 1, that the utility model provides comprises PLC, air inlet pipeline A and outlet pipe B.Air inlet pipeline A one end connects source nitrogen 3, the other end connects centrifuge 9, is connected with hand guiding valve 4, first safety valve 5, first filter 6, first pressure-reducing valve 7 (magnetic valve) in the air inlet pipeline successively, the corresponding connection with PLC of the signal controlling end of first pressure-reducing valve 7; First pressure-reducing valve, 7 two ends are parallel with second pressure-reducing valve 8 (magnetic valve) in the air inlet pipeline, the corresponding connection with PLC of the signal controlling end of second pressure-reducing valve 8.First pressure-reducing valve, 7 both sides are respectively equipped with air gauge S in the air inlet pipeline.
Outlet pipe B one end connects centrifuge 9, the other end connects exhaust pump 13; Connect second filter 10, flowmeter 11 and gas sensor 12 in the outlet pipe successively, the frequency converter that exhaust pump 13 connects and corresponding with the PLC respectively connection of signal controlling end of gas sensor 12; Other is provided with display 2 and hand switch 14, corresponding with the PLC respectively connection of their signal controlling end.
In addition, the corresponding connection with PLC of signal controlling end of the motor frequency conversion device 9a of centrifuge 9 is with running statuses such as control centrifuge 9 start and stops.
The utility model course of work is following:
Through the lambda sensor in the outlet pipe 12; Monitor the oxygen content in the centrifuge 9 in real time; And send the oxygen content data signal to PLC; After PLC calculating, control the keying of two pressure-reducing valves and hand switch, be in safety value with oxygen content and explosion hazard gases content in the control centrifuge.
1. when the centrifuge oxygen content is higher than the security settings upper limit alarm, can not start centrifuge when the operative employee presses hand switch 14, this moment, system possessed operating condition to the logical high-pressure high-flow nitrogen of centrifuge so that fill nitrogen fast automatically in advance, enhanced productivity.
2. when the centrifuge oxygen content is lower than security settings lower limit alarming value; The operative employee can start or stop centrifuge; This moment high-pressure high-flow fill the nitrogen closed electromagnetic valve but system still to the logical low pressure low discharge nitrogen of centrifuge, low discharge nitrogen is used for remedying in the centrifuge cavity nitrogen normal consumption and keeps hypoxia in the chamber;
3. have only oxygen content operative employee when the lower limit alarming value is following of actual detected just can start or stop centrifuge.
4. equipment stops centrifuge automatically when oxygen content is higher than security settings upper limit alarm value, when oxygen content is lower than the lower safety limit alarming value, could start centrifuge.
No matter under which kind of state, all have only the oxygen content of actual detected in the centrifuge to be lower than the lower limit alarming value, centrifuge just possesses operating condition.
Claims (5)
1. the centrifuge nitrogen protection device is characterized in that comprising PLC, air inlet pipeline A and outlet pipe B;
Air inlet pipeline one end connects source nitrogen (3), the other end connects centrifuge (9); Be connected with first safety valve (5), first filter (6) and first pressure-reducing valve (7) in the air inlet pipeline successively, the corresponding connection of the signal controlling end of first pressure-reducing valve (7) with PLC;
Outlet pipe one end connects centrifuge (9), the other end connects exhaust pump (13); Connect second filter (10), flowmeter (11) and gas sensor (12) in the outlet pipe successively, corresponding with the PLC respectively connection of the signal controlling end of exhaust pump (13) and gas sensor (12);
Other is provided with display (2) and hand switch (14), corresponding with the PLC respectively connection of their signal controlling end.
2. centrifuge nitrogen protection device according to claim 1 is characterized in that first pressure-reducing valve (7) two ends are parallel with second pressure-reducing valve (8) in the air inlet pipeline, the corresponding connection with PLC of the signal controlling end of second pressure-reducing valve (8).
3. centrifuge nitrogen protection device according to claim 1 and 2 is characterized in that the preceding hand guiding valve (4) that also is connected with of first pressure-reducing valve (7) in the air inlet pipeline.
4. centrifuge nitrogen protection device according to claim 3 is characterized in that first pressure-reducing valve (7) both sides are respectively equipped with air gauge S in the air inlet pipeline.
5. centrifuge nitrogen protection device according to claim 1 is characterized in that the corresponding connection with PLC of signal controlling end of the motor frequency conversion device (9a) of centrifuge (9), with running statuses such as control centrifuge (9) start and stops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200656303U CN202479057U (en) | 2012-02-27 | 2012-02-27 | Nitrogen protection device for centrifugal machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200656303U CN202479057U (en) | 2012-02-27 | 2012-02-27 | Nitrogen protection device for centrifugal machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202479057U true CN202479057U (en) | 2012-10-10 |
Family
ID=46953520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200656303U Expired - Fee Related CN202479057U (en) | 2012-02-27 | 2012-02-27 | Nitrogen protection device for centrifugal machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202479057U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580863A (en) * | 2012-02-27 | 2012-07-18 | 蚌埠精工制药机械有限公司 | Nitrogen protection device of centrifugal machine |
-
2012
- 2012-02-27 CN CN2012200656303U patent/CN202479057U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580863A (en) * | 2012-02-27 | 2012-07-18 | 蚌埠精工制药机械有限公司 | Nitrogen protection device of centrifugal machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20130227 |