CN215449998U - Pressure control system of zero evaporation magnet thermostat - Google Patents
Pressure control system of zero evaporation magnet thermostat Download PDFInfo
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- CN215449998U CN215449998U CN202121827232.6U CN202121827232U CN215449998U CN 215449998 U CN215449998 U CN 215449998U CN 202121827232 U CN202121827232 U CN 202121827232U CN 215449998 U CN215449998 U CN 215449998U
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Abstract
The utility model provides a pressure control system of a zero-evaporation magnet thermostat, which comprises a thermostat body, wherein a magnet coil is arranged in the thermostat body; the gas supplementing assembly comprises a helium bottle, a pressure reducing valve and an electromagnetic valve, the pressure reducing valve and the electromagnetic valve are both connected with the control host, and when the magnet is cooled, the control host controls the opening and closing of the host and the gas supplementing assembly according to a pressure value detected by the pressure sensor, so that the pressure in the thermostat is not lower than atmospheric pressure; when the thermostat is in stable operation, the heater heats the thermostat to maintain the pressure inside the thermostat stable.
Description
Technical Field
The utility model relates to the technical field of thermostats, in particular to a pressure control system of a zero-evaporation magnet thermostat.
Background
The zero-evaporation magnet thermostat is a constant temperature system which maintains the low-temperature stable operation of a superconducting magnet and reduces the consumption of liquid helium under the low-temperature condition of the magnet. The system mainly comprises a magnet coil, a thermostat, a cold shield, a Dewar and some auxiliary testing devices. And a GM refrigerator is used for providing cold energy to cool the coil in the magnet so as to enable the coil to be in a superconducting state.
When the thermostat is in the cooling process, the pressure in the whole magnet thermostat is reduced along with the reduction of the temperature of the magnet thermostat; when the thermostat operates stably, the refrigerating power output of the GM refrigerator is slightly larger than the heat load of the thermostat, so that helium in the thermostat is continuously liquefied, and the pressure in the thermostat is reduced; when the pressure in the thermostat is reduced, the problem that impurities are sucked in due to negative pressure can occur in the magnet, and the normal work of the magnet is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pressure control system of a zero-evaporation magnet thermostat, which can reduce the pressure fluctuation range in the thermostat and avoid the suction of impurities into a magnet due to negative pressure.
The utility model provides the following technical scheme:
a pressure control system of a zero-evaporation magnet thermostat comprises a thermostat body, wherein a magnet coil is arranged in the thermostat body, and the pressure control system is characterized by comprising a control host, an air supplementing assembly, a heater, a pressure sensor and a liquid level meter, wherein the heater, the pressure sensor and the liquid level meter are arranged in the thermostat body and are all connected to the control host;
the air supplementing assembly comprises a helium bottle, a pressure reducing valve and an electromagnetic valve, and the pressure reducing valve and the electromagnetic valve are connected with the control host.
Preferably, the pressure sensor is used for monitoring the internal pressure of the thermostat body and transmitting monitoring data to the control host through an interface, and the control host adjusts opening and closing of the pressure reducing valve and the electromagnetic valve according to the internal pressure value of the thermostat body.
Preferably, a thermometer is further arranged in the thermostat body, the thermometer is connected with the control host and used for monitoring the temperature inside the thermostat body and transmitting monitoring data to the control host through an interface, and the control host adjusts the on-off of the heater according to the temperature value inside the thermostat body.
Preferably, one side of the upper end of the thermostat body is connected with a GM refrigerator, and the GM refrigerator is used for cooling the thermostat body.
Preferably, a liquid inlet pipe is further inserted into the thermostat body.
Preferably, the thermostat body includes inside cavity, cold shield and the dewar that sets gradually from inside to outside, magnet coil, the heater, the thermometer with pressure sensor all locates in the inside cavity.
Preferably, the mobile terminal further comprises a touch screen connected with the control host.
The utility model has the beneficial effects that: in the temperature reduction process of the magnet, the control host controls the opening and closing of the host and the air supplement component according to the pressure value detected by the pressure sensor, and the pressure in the thermostat is maintained to be not lower than the atmospheric pressure; when the thermostat operates steadily, heat in order to maintain the thermostat internal pressure steady through the heater, simultaneously, the control host computer carries out temperature monitoring through the thermometer to the thermostat inside, when the temperature is higher than the settlement threshold value, forces the disconnection heater, avoids the high temperature to cause the damage to the thermostat.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
labeled as: 1. a magnet coil; 2. a thermostat body; 3. cooling the screen; 4. a Dewar; 5. a GM refrigerator; 6. a liquid inlet pipe; 7. an electromagnetic valve; 8. a liquid level meter; 9. a pressure sensor; 10. a heater; 11. a pressure reducing valve; 12. a helium tank; 13. and a control host.
Detailed Description
As shown in fig. 1, a pressure control system of a zero-evaporation magnet thermostat comprises a thermostat body 2, a magnet coil 1 is arranged inside the thermostat body 2, one side of the upper end of the thermostat body 2 is connected with a GM refrigerator 5, the GM refrigerator 5 is used for cooling the thermostat body 2, a liquid inlet pipe 6 is inserted inside the thermostat body 2, and the installation modes of the magnet coil 1, the GM refrigerator 5 and the liquid inlet pipe 6 are the same as the installation modes of related components in the existing thermostat.
As shown in fig. 1, a pressure control system of a zero-evaporation magnet thermostat includes a control host 13, an air supply component, and a heater 10, a pressure sensor 9 and a level meter 8 which are arranged inside a thermostat body 2, wherein the heater 10, the pressure sensor 9 and the level meter 8 are all connected to the control host 13.
The pressure sensor 9 is used for monitoring the internal pressure of the thermostat body 2, transmitting monitoring data to the control host 13 through the interface, and the control host 13 adjusts opening and closing of the pressure reducing valve 11 and the electromagnetic valve 7 according to the internal pressure value of the thermostat body 2.
Still be equipped with the thermometer in the thermostat body 2, the thermometer is connected with main control system 13 for to the monitoring of 2 inside temperatures of thermostat body, and transmit monitoring data to main control system 13 through the interface, main control system 13 adjusts opening and close of heater 10 according to 2 inside temperature values of thermostat body.
The air supplementing component comprises a helium bottle 12, a pressure reducing valve 11 and an electromagnetic valve 7, and the pressure reducing valve 11 and the electromagnetic valve 7 are both connected with a control host 13.
As shown in fig. 1, the thermostat body 2 includes an internal cavity, a cold shield 3 and a dewar 4, which are sequentially arranged from inside to outside, and the magnet coil 1, the heater 10, the thermometer and the pressure sensor 9 are all arranged in the internal cavity.
The pressure control system of the zero-evaporation magnet thermostat further comprises a touch screen connected with a control host 13, wherein the touch screen is connected with a control operation module of the control host 13, and real-time monitoring and query of data are achieved.
In the process of cooling the magnet, the whole magnet thermostat is precooled by liquid nitrogen to a preset temperature, and after replacement is carried out by helium, the GM refrigerator 5 is started to cool, at this time, the air pressure in the whole thermostat body 2 is reduced along with the reduction of the temperature, the pressure sensor 9 is used for monitoring the internal pressure of the thermostat body 2, monitoring data is transmitted to the control host 13 through an interface, the control host 13 compares the monitored data with a preset pressure value threshold value, when the pressure value in the thermostat body 2 is lower than a set threshold value, the pressure reducing valve 11 and the electromagnetic valve 7 are controlled to be started, helium in the helium tank 12 is conveyed to the inside of the thermostat body 2 through a pipeline, the pressure in the thermostat is maintained to be not lower than the atmospheric pressure, and the pressure reducing valve 11 and the electromagnetic valve 7 are turned off to be switched on and off after the pressure in the thermostat body 2 meets requirements.
When the thermostat body 2 stably runs, the refrigerating power output of the GM refrigerator 5 is slightly larger than the heat load of the thermostat body 2, helium gas in the thermostat is continuously liquefied, the pressure in the thermostat is reduced, at the moment, the pressure sensor 9 is used for monitoring the internal pressure of the thermostat body 2 and transmitting the monitoring data to the control host 13 through the interface, the control host 13 compares the monitored data with a preset pressure value threshold, and when the internal pressure value of the thermostat body 2 is lower than the set threshold, the control heater 10 is started to heat the inside of the thermostat body 2 and evaporate trace liquid helium to maintain the stability of the pressure; and, monitor the temperature value of the inside of the thermostat body 2 through the thermometer, and transmit the monitoring data to the control host computer 13 through the interface, the control host computer 13 compares the data monitored with the temperature value threshold value presumed in advance, when the temperature value exceeds the set value, force to disconnect the heater 10, in order to avoid the damage of the thermostat body 2 caused by the high temperature.
Meanwhile, the actual liquid level in the thermostat body 2 is monitored through the liquid level meter 8, and the heat load change condition of the thermostat body 2 is further monitored through the power of the heater 10 and the change of the liquid level, so that the stable operation of the thermostat is ensured.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A pressure control system of a zero-evaporation magnet thermostat comprises a thermostat body, wherein a magnet coil is arranged in the thermostat body, and the pressure control system is characterized by comprising a control host, an air supplementing assembly, a heater, a pressure sensor and a liquid level meter, wherein the heater, the pressure sensor and the liquid level meter are arranged in the thermostat body and are all connected to the control host;
the air supplementing assembly comprises a helium bottle, a pressure reducing valve and an electromagnetic valve, and the pressure reducing valve and the electromagnetic valve are connected with the control host.
2. The pressure control system of a zero-evaporation magnet thermostat of claim 1, wherein the pressure sensor is used for monitoring the internal pressure of the thermostat body and transmitting monitoring data to the control host through an interface, and the control host adjusts the opening and closing of the pressure reducing valve and the solenoid valve according to the internal pressure value of the thermostat body.
3. The pressure control system of a zero-evaporation magnet thermostat of claim 1, wherein a thermometer is further disposed in the thermostat body, the thermometer is connected to the control host for monitoring the temperature inside the thermostat body and transmitting the monitoring data to the control host through an interface, and the control host adjusts the on/off of the heater according to the temperature value inside the thermostat body.
4. The pressure control system of a zero-evaporation magnet thermostat of claim 1, wherein a GM refrigerator is connected to one side of the upper end of the thermostat body, the GM refrigerator being configured to cool the thermostat body.
5. A pressure control system for a zero-boil-off magnet thermostat as claimed in claim 1 wherein a liquid inlet pipe is also inserted into the thermostat body.
6. A pressure control system of a zero evaporation magnet thermostat as claimed in claim 3 wherein the thermostat body includes an interior cavity, a cold shield and a dewar arranged in sequence from inside to outside, the magnet coil, the heater, the thermometer and the pressure sensor all being located in the interior cavity.
7. A pressure control system for a zero-evaporation magnet thermostat according to claim 1 further comprising a touch screen connected to the control host.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121827232.6U CN215449998U (en) | 2021-08-06 | 2021-08-06 | Pressure control system of zero evaporation magnet thermostat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121827232.6U CN215449998U (en) | 2021-08-06 | 2021-08-06 | Pressure control system of zero evaporation magnet thermostat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215449998U true CN215449998U (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121827232.6U Active CN215449998U (en) | 2021-08-06 | 2021-08-06 | Pressure control system of zero evaporation magnet thermostat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215449998U (en) |
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2021
- 2021-08-06 CN CN202121827232.6U patent/CN215449998U/en active Active
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