CN215764606U - Intelligent exhaust control system for vacuum pipeline - Google Patents
Intelligent exhaust control system for vacuum pipeline Download PDFInfo
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- CN215764606U CN215764606U CN202122082946.5U CN202122082946U CN215764606U CN 215764606 U CN215764606 U CN 215764606U CN 202122082946 U CN202122082946 U CN 202122082946U CN 215764606 U CN215764606 U CN 215764606U
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- liquid nitrogen
- exhaust
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- plc controller
- automatic exhaust
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Abstract
The utility model provides an intelligent exhaust control system of a vacuum pipeline, which comprises a liquid nitrogen storage tank, wherein the liquid nitrogen storage tank is electrically connected with a liquid nitrogen control box, the liquid nitrogen control box is electrically connected with an automatic liquid nitrogen tower exhaust PLC (programmable logic controller), the automatic liquid nitrogen tower exhaust PLC is electrically connected with a valve positioner, the valve positioner is connected with an exhaust pressure reducing valve through a pipeline, one end of the exhaust pressure reducing valve is connected with the liquid nitrogen storage tank through a pipeline, the other end of the exhaust pressure reducing valve is connected with an exhaust pipe through a pipeline, the other side of the valve positioner is detachably connected with an air inlet pipe, and the air inlet pipe is detachably connected with the liquid nitrogen storage tank. The utility model controls the exhaust pressure reducing valve, the valve positioner and the detection of the temperature of the corresponding nitrogen through the automatic exhaust PLC of the liquid nitrogen tower, thereby realizing the discharge of the nitrogen with the corresponding air pressure.
Description
Technical Field
The utility model relates to the technical field of nitrogen emission, in particular to an intelligent exhaust control system for a vacuum pipeline.
Background
In the working process of the liquid nitrogen vacuum pipeline, nitrogen generated in the pipeline needs to be automatically discharged out of a room so as to avoid the danger of oxygen deficiency and asphyxia caused by excessive nitrogen discharged into the room.
The existing liquid nitrogen vacuum pipeline controls the nitrogen amount of discharged liquid by using the exhaust valve when the liquid nitrogen is discharged, but the exhaust valve only can manually control the size of a valve port, so that the technical problem of inaccurate nitrogen discharge control is solved.
SUMMERY OF THE UTILITY MODEL
The utility model provides an intelligent exhaust control system of a vacuum pipeline, which is used for solving the technical problems that the existing liquid nitrogen vacuum pipeline provided in the background technology controls the amount of discharged liquid nitrogen by arranging an exhaust valve when discharging liquid nitrogen, but the exhaust valve can only manually control the size of a valve port and cannot accurately control the discharge of nitrogen.
In order to achieve the purpose, the utility model provides the following technical scheme: vacuum line intelligence exhaust control system, including the liquid nitrogen holding vessel, liquid nitrogen holding vessel electric connection liquid nitrogen control box, liquid nitrogen control box electric connection liquid nitrogen tower automatic exhaust PLC controller, liquid nitrogen tower automatic exhaust PLC controller electric connection valve positioner, valve positioner pipe connection exhaust relief pressure valve, exhaust relief pressure valve one end pipe connection the liquid nitrogen holding vessel, other end pipe connection blast pipe, the connection intake pipe can be dismantled to valve positioner opposite side, the connection can be dismantled to the intake pipe the liquid nitrogen holding vessel.
Further, the pressure of nitrogen discharged into the valve positioner from the intake pipe is 0.3MPa or less.
Furthermore, the liquid nitrogen control box electrically receives a liquid nitrogen tower pressure liquid level signal in the liquid nitrogen storage tank, the liquid nitrogen tower automatic exhaust PLC controller electrically receives a 4-20MA pressure signal received by the liquid nitrogen control box, the liquid nitrogen tower automatic exhaust PLC controller transmits a 4-20MA driving signal to the valve positioner, and transmits a corresponding feedback signal to the liquid nitrogen tower automatic exhaust PLC controller.
Further, the liquid nitrogen holding vessel can be dismantled and connect vacuum cryogenic pipeline, a plurality of sample jars of pipe connection on the vacuum cryogenic pipeline, a plurality of sample jar one end pipe connection liquid nitrogen tower automatic exhaust PLC controller, and adjacent two be equipped with temperature sensor between the sample jar, temperature sensor electric connection liquid nitrogen tower automatic exhaust PLC controller, liquid nitrogen tower automatic exhaust PLC controller pipe connection drive solenoid valve, drive solenoid valve one end pipe connection the relief pressure valve that exhausts.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model monitors the air pressure in the liquid nitrogen storage tank through the automatic air exhaust PLC of the liquid nitrogen tower, and when the air pressure reaches the specified air pressure, the air is exhausted through the air exhaust pressure reducing valve;
and, when carrying out the control, because the atmospheric pressure of nitrogen gas reduces to the temperature that corresponds the liquid nitrogen rises, thereby utilizes a plurality of sample jars to take a sample, then transmits the sample to liquid nitrogen tower automatic exhaust PLC controller, and detects the temperature of every sample through temperature sensor, when the temperature is not up to standard carry out the passback, then rises at the transmission temperature, discharges when being fit for the temperature.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of the liquid nitrogen depressurization temperature detection of the present invention;
FIG. 3 is a schematic view of the vent and pressure relief valve of the present invention.
In the figure: 1. a liquid nitrogen storage tank; 11. a vacuum low temperature pipeline; 12. a sample tank; 13. a temperature sensor; 14. driving the electromagnetic valve; 2. a liquid nitrogen control box; 3. the liquid nitrogen tower automatically exhausts the PLC controller; 4. a valve positioner; 41. air filtering pressure reducers 42, hand wheel mechanisms 43 and valve bodies; 5. a relief pressure valve; 6. an exhaust pipe; 7. an air inlet pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the utility model.
In an embodiment, please refer to fig. 1-3 again, a vacuum pipeline intelligent exhaust control system includes a liquid nitrogen storage tank 1, the liquid nitrogen storage tank 1 is electrically connected to a liquid nitrogen control box 2, the liquid nitrogen control box 2 is electrically connected to a liquid nitrogen tower automatic exhaust PLC controller 3, the liquid nitrogen tower automatic exhaust PLC controller 3 is electrically connected to a valve positioner 4, the valve positioner 4 is connected to an exhaust pressure reducing valve 5 through a pipeline, one end of the exhaust pressure reducing valve 5 is connected to the liquid nitrogen storage tank 1 through a pipeline, the other end of the exhaust pressure reducing valve is connected to an exhaust pipe 6 through a pipeline, the other side of the valve positioner 4 is detachably connected to an air inlet pipe 7, the pressure of nitrogen gas exhausted into the valve positioner 4 by the air inlet pipe 7 is below 0.3MPa, and the air inlet pipe 7 is detachably connected to the liquid nitrogen storage tank 1;
the liquid nitrogen control box 2 is electrically used for receiving a liquid nitrogen tower pressure liquid level signal in the liquid nitrogen storage tank 1, the liquid nitrogen tower automatic exhaust PLC controller 3 is used for receiving a 4-20MA pressure signal received by the liquid nitrogen control box 2 in a telecommunication mode, the liquid nitrogen tower automatic exhaust PLC controller 3 is used for transmitting a 4-20MA driving signal to the valve positioner 4 and transmitting a corresponding feedback signal to the liquid nitrogen tower automatic exhaust PLC controller 3.
Please refer to fig. 2 again, the liquid nitrogen storage tank 1 is detachably connected to a vacuum low-temperature pipeline 11, the vacuum low-temperature pipeline 11 is connected to a plurality of sample tanks 12, one end of each of the sample tanks 12 is connected to the liquid nitrogen tower automatic exhaust PLC controller 3, a temperature sensor 13 is arranged between two adjacent sample tanks 12, the temperature sensor 13 is electrically connected to the liquid nitrogen tower automatic exhaust PLC controller 3, the liquid nitrogen tower automatic exhaust PLC controller 3 is connected to a driving solenoid valve 14, and one end of the driving solenoid valve 14 is connected to the exhaust pressure reducing valve 5.
The operation principle is as follows: the method comprises the following steps of discharging corresponding nitrogen through a liquid nitrogen storage tank, reducing the pressure of the liquid nitrogen through an air filtering pressure reducer before discharging, and increasing the temperature of the nitrogen after pressure reduction, so that the nitrogen is correspondingly transmitted through a vacuum low-temperature pipeline, and meanwhile, a temperature sensor performs corresponding temperature measurement;
when the qualified temperature is measured, the liquid nitrogen tower automatic exhaust PLC controller controls the valve positioner and the exhaust pressure reducing valve to discharge corresponding nitrogen, and meanwhile, the exhaust pressure reducing valve is composed of a valve body and a hand wheel mechanism, and the hand wheel mechanism is detachably connected with the valve positioner, so that automatic control and manual control are realized.
When the temperature of the corresponding sample tank is unqualified, nitrogen is returned to the air filtering pressure reducer in the liquid nitrogen storage tank through the valve positioner and the exhaust pressure reducing valve to be subjected to pressure reduction, and the nitrogen is discharged after reaching the specified temperature.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. Vacuum line intelligence exhaust control system, including liquid nitrogen holding vessel (1), its characterized in that: liquid nitrogen holding vessel (1) electric connection liquid nitrogen control box (2), liquid nitrogen control box (2) automatic exhaust PLC controller (3) of liquid nitrogen tower of electric connection, liquid nitrogen tower automatic exhaust PLC controller (3) electric connection valve locator (4), valve locator (4) pipe connection exhaust relief pressure valve (5), exhaust relief pressure valve (5) one end pipe connection liquid nitrogen holding vessel (1), other end pipe connection blast pipe (6), connection intake pipe (7) can be dismantled to valve locator (4) opposite side, the connection can be dismantled in intake pipe (7) liquid nitrogen holding vessel (1).
2. The vacuum line intelligent exhaust control system of claim 1, wherein: the pressure of nitrogen discharged into the valve positioner (4) from the air inlet pipe (7) is below 0.3 MPa.
3. The vacuum line intelligent exhaust control system of claim 1, wherein: the liquid nitrogen control box (2) is electrically used for receiving a liquid nitrogen tower pressure liquid level signal in the liquid nitrogen storage tank (1), the liquid nitrogen tower automatic exhaust PLC controller (3) is used for receiving a 4-20MA pressure signal received by the liquid nitrogen control box (2) in a telecommunication mode, the liquid nitrogen tower automatic exhaust PLC controller (3) transmits a 4-20MA driving signal to the valve positioner (4) and transmits a corresponding feedback signal to the liquid nitrogen tower automatic exhaust PLC controller (3).
4. The vacuum line intelligent exhaust control system of claim 1, wherein: liquid nitrogen holding vessel (1) can be dismantled and connect vacuum low temperature pipeline (11), a plurality of sample jar (12) of pipe connection on vacuum low temperature pipeline (11), it is a plurality of sample jar (12) one end pipe connection liquid nitrogen tower automatic exhaust PLC controller (3), and adjacent two be equipped with temperature sensor (13) between sample jar (12), temperature sensor (13) electric connection liquid nitrogen tower automatic exhaust PLC controller (3), liquid nitrogen tower automatic exhaust PLC controller (3) pipe connection drive solenoid valve (14), drive solenoid valve (14) one end pipe connection exhaust relief pressure valve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122082946.5U CN215764606U (en) | 2021-08-31 | 2021-08-31 | Intelligent exhaust control system for vacuum pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122082946.5U CN215764606U (en) | 2021-08-31 | 2021-08-31 | Intelligent exhaust control system for vacuum pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215764606U true CN215764606U (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122082946.5U Active CN215764606U (en) | 2021-08-31 | 2021-08-31 | Intelligent exhaust control system for vacuum pipeline |
Country Status (1)
| Country | Link |
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| CN (1) | CN215764606U (en) |
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2021
- 2021-08-31 CN CN202122082946.5U patent/CN215764606U/en active Active
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