CN205122322U - Superconducting magnet safety exhaust system , pressure control system and magnetic resonance imaging equipment - Google Patents
Superconducting magnet safety exhaust system , pressure control system and magnetic resonance imaging equipment Download PDFInfo
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- CN205122322U CN205122322U CN201520938242.5U CN201520938242U CN205122322U CN 205122322 U CN205122322 U CN 205122322U CN 201520938242 U CN201520938242 U CN 201520938242U CN 205122322 U CN205122322 U CN 205122322U
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- valve
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- exhaust valve
- pressure
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- 238000002595 magnetic resonance imaging Methods 0.000 title claims abstract description 9
- 239000003507 refrigerant Substances 0.000 claims abstract description 37
- 238000010791 quenching Methods 0.000 claims description 29
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000000740 bleeding effect Effects 0.000 abstract 4
- 238000010586 diagram Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
The utility model discloses a superconducting magnet safety exhaust system, include: main exhaust valve and assistance air bleeding valve, wherein, main exhaust valve and the direct intercommunication of the refrigerant container of placing superconducting magnet, assist the air bleeding valve with the parallelly connected mode of main exhaust valve with the refrigerant container directly communicates, the settlement of assistance air bleeding valve is opened the superficial pressure and is less than absolute pressure is opened in the settlement of main exhaust valve. The utility model discloses in still disclose a pressure control system and magnetic resonance imaging equipment. The utility model provides a basis that technical scheme can require in the safe exhaust of satisfying superconducting magnet down, convenient resignation processing of assisting the air bleeding valve, and this processing need not to reduce the pressure of refrigerant container.
Description
Technical Field
The utility model relates to the field of medical equipment, especially a pressure control system and magnetic resonance imaging equipment of superconducting magnet safety exhaust system, refrigerant container.
Background
In superconducting magnet refrigeration systems that require a constant magnetic field to be achieved by cooling the superconducting magnet, such as in Magnetic Resonance Imaging (MRI) equipment, the superconducting magnet is typically placed in a cryogen vessel (cryogenic container) that is in turn placed within an external vacuum chamber, the space between the vacuum chamber and the cryogen vessel being evacuated to provide effective thermal insulation for the cryogen vessel. Further, in order to reduce the radiant heat between the vacuum chamber and the cryogen vessel, a thermal radiation shield is sometimes provided between the vacuum chamber and the cryogen vessel.
In cooling, the superconducting magnet is cooled to a predetermined temperature, i.e., an operating temperature, by boiling a liquid cryogen (e.g., liquid helium) in a cryogen vessel. However, in some cases the superconducting magnet will quench, for example, when a field reduction is required in the event of certain dangerous conditions, the magnet will quench and the electromagnetic energy will be converted into heat energy, which will raise the temperature of the magnet, which in turn will cause a large amount of evaporation of the liquid cryogen (e.g., liquid helium) and a rapid rise in pressure within the container in a short period of time. If the volatilized refrigerant gas cannot be discharged in time, the pressure in the container exceeds the designed pressure, which causes damage to the container, and is very dangerous, so that the existing superconducting magnet refrigerating system is provided with a pressure control system of the refrigerant container, including an exhaust pipeline, a safety valve and the like. For example, for pressure control over a quench time, a quench valve and corresponding exhaust line are typically provided. In addition, in order to avoid the situation that the exhaust channel cannot be opened due to damage of the quench valve when the magnet loses time, a rupture disk bypass is arranged, and when the quench valve cannot be opened, the rupture disk is ruptured to open the exhaust channel. In addition, in order to control pressure fluctuations that may occur in the cryogen vessel at the operating temperature of the superconducting magnet, the pressure control system is also provided with a pressure regulating valve that opens when the pressure within the cryogen vessel exceeds a set threshold. In one embodiment, the quench valve, rupture disk bypass, and pressure regulator valve may be in communication with the refrigerant reservoir through a service tower housing.
In addition, in order to ensure the safety of air transportation during the air transportation, at least two exhaust valves, namely a main exhaust valve and an auxiliary exhaust valve, are generally configured during the air transportation of the superconducting magnet to ensure the safe discharge of refrigerant gas during the air transportation. Wherein the primary vent valve opens at 16psi absolute and the secondary vent valve opens at 13psi gauge pressure. In general, the primary vent valve may be implemented by the pressure regulating valve described above, and the secondary vent valve is typically a temporary vent valve provided for air transportation and removed after air transportation is completed.
Since it is undesirable for an operator to reduce the pressure in the cryogen vessel in order to remove the auxiliary vent valve, the auxiliary vent valve that needs to be removed will generally not be in direct communication with the cryogen vessel, and in some current applications the auxiliary vent valve is installed at the rear end of the quench valve, i.e., the auxiliary vent valve is connected in series with the quench valve. In addition, those skilled in the art are also working to find other solutions.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a superconducting magnet safety exhaust system on one hand, and provides a pressure control system and a magnetic resonance imaging apparatus for a cryogen vessel on the other hand, so as to satisfy the safety exhaust requirement of the superconducting magnet, and facilitate the discharge and discharge process of the auxiliary exhaust valve, and the process does not need to reduce the pressure of the cryogen vessel.
The utility model discloses in the safe exhaust system of a superconducting magnet that proposes, include: a main exhaust valve and an auxiliary exhaust valve; wherein,
the main exhaust valve is directly communicated with a cryogen vessel in which the superconducting magnet is placed;
the secondary vent valve is adapted to communicate directly with the cryogen vessel in parallel with the primary vent valve; the set opening gauge pressure of the auxiliary exhaust valve is smaller than the set opening absolute pressure of the main exhaust valve.
In one embodiment, the safety exhaust system further comprises: a connecting passage in direct communication with said cryogen vessel; the connecting channel has a first port and a second port; the first port is connected with the main exhaust valve; the second port is connected with the auxiliary exhaust valve.
In one embodiment, the safety vent system further comprises a first closure member located at the end of the secondary vent valve.
In one embodiment, the closure is a plug.
In one embodiment, the secondary vent valve is removably mounted on the cryogen injection port so as to be in direct communication with the cryogen vessel.
In one embodiment, the system further comprises a quench valve and a second closure, the quench valve being secured by the second closure.
The utility model discloses in put forward a pressure control system, including the superconducting magnet safety exhaust system of any above-mentioned realization form.
The present invention provides a magnetic resonance imaging apparatus, including the above-mentioned pressure control system.
It can be seen from the above-mentioned scheme that because the utility model discloses in will assist discharge valve in order to communicate the refrigerant container with the mode that main discharge valve is parallelly connected in parallel, that is to say, assist and do not have other valve bodies between discharge valve and the refrigerant container to can guarantee to assist 13 psi's of discharge valve to set for and open gauge pressure, can satisfy the safe exhaust requirement of superconducting magnet when the air transportation. In addition, the auxiliary vent valve may be functionally disabled without reducing the pressure of the cryogen vessel. For example, when the auxiliary discharge valve is integrated on the main discharge valve in parallel with the main discharge valve, by directly closing the auxiliary discharge valve, the valve body function of the auxiliary discharge valve can be removed without removing the auxiliary discharge valve by reducing the pressure of the refrigerant container. For another example, when the auxiliary vent valve is detachably attached to the refrigerant inlet of the refrigerant container, it is only necessary to detach the auxiliary vent valve from the refrigerant inlet, and this operation does not require a reduction in the pressure of the refrigerant container, and is allowed within a safe range although it may cause an operator to instantaneously touch the refrigerant gas.
Drawings
The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings, in which:
fig. 1 is a schematic diagram of a superconducting magnet safety exhaust system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a superconducting magnet safety exhaust system according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a superconducting magnet safety exhaust system according to still another embodiment of the present invention.
Wherein the reference numbers are as follows:
| reference numerals | Means of |
| 1 | Quench valve |
| 2 | Main exhaust valve |
| 3 | Auxiliary exhaust valve |
| 4 | Service tower |
| 41 | Service tower outer cover |
| 411 | Refrigerant injection port |
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail by referring to the following embodiments.
Fig. 1 is a schematic diagram of a superconducting magnet safety exhaust system according to an embodiment of the present invention. As shown in fig. 1, in the present invention, the superconducting magnet safety exhaust system includes a quench valve 1, a main exhaust valve 2 and an auxiliary exhaust valve 3. The auxiliary exhaust valve 3 has a set opening gauge pressure, and the main exhaust valve 2 has a set opening absolute pressure; and the set opening gauge pressure of the auxiliary exhaust valve 3 is smaller than the set opening absolute pressure of the main exhaust valve 2.
Wherein, during air transportation, the main exhaust valve 2 and the auxiliary exhaust valve 3 are directly communicated with a cryogen vessel for placing a superconducting magnet in a parallel way; while the quench valve 1 is closed by a closure member 11.
After the air transportation is finished, the auxiliary exhaust valve 3 can be functionally disabled, i.e., the valve body function of the auxiliary exhaust valve 3 is removed, without lowering the pressure of the refrigerant container. The main exhaust valve 2 is used to control pressure fluctuations that may be generated by the cryogen vessel at the operating temperature of the superconducting magnet. In addition, the closure of the quench valve 1 is removed to restore the valve body function of the quench valve 1.
In one embodiment, the quench valve 1, the primary vent valve 2, and the secondary vent valve 3 are all in direct communication with the cryogen vessel (not shown in the figures) through the housing 41 of the service tower 4 which is in direct communication with the cryogen vessel.
There are various specific implementations in which the main exhaust valve 2 and the auxiliary exhaust valve 3 are directly connected in parallel to a cryogen vessel in which the superconducting magnet is placed, and the following description will be made by way of two examples.
Fig. 2 is a schematic structural diagram of a superconducting magnet safety exhaust system according to an embodiment of the present invention. As shown in fig. 2, in this embodiment, the superconducting magnet safety exhaust system includes a quench valve 1, a main exhaust valve 2, an auxiliary exhaust valve 3, and a connecting passage 5.
Wherein the connecting channel 5 has a first port and a second port; the first port is connected with the main exhaust valve 2; the second port is connected to the auxiliary exhaust valve 3.
In one example, the auxiliary outlet valve 3 may be integrated with the main outlet valve 2 on the connecting channel 5. After the air transport has ended, the auxiliary outlet valve 3 can be closed by a closure element (not shown) which can be located at the end of the auxiliary outlet valve 3, i.e. the valve body function of the auxiliary outlet valve 3 is removed. Wherein the closing element can be a plug or the like.
In this embodiment, the quench valve 1 is closed by another closure member, such as the screw member 11 (which may comprise a bolt and nut) shown in fig. 2, during air transportation. After the air transportation is finished, the closing part of the quench valve 1 is removed to restore the valve body function of the quench valve 1.
In this embodiment, the quench valve 1, the primary vent valve 2 and the secondary vent valve 3 are all in direct communication with the cryogen vessel (not shown) through the housing 41 of the service tower 4 which is in communication with the cryogen vessel.
Further, the housing 41 of the service tower 4 has a refrigerant inlet 411.
Fig. 3 is a schematic structural diagram of a superconducting magnet safety exhaust system according to still another embodiment of the present invention. As shown in fig. 3, in this embodiment, the superconducting magnet safety exhaust system includes a quench valve 1, a main exhaust valve 2 and an auxiliary exhaust valve 3.
In which a refrigerant inlet 411 of a refrigerant container is provided on the housing 41 of the service tower 4 communicating with the refrigerant container (not shown in the figure). The auxiliary discharge valve 3 has a mounting interface to be fitted to the refrigerant inlet 411, and the auxiliary discharge valve 3 is detachably mounted to the refrigerant inlet 411 to directly communicate with the refrigerant container. For example, the refrigerant injection port 411 is attached to the air-cargo ship during the air-cargo transportation, and is detached from and collected in the refrigerant injection port 411 after the air-cargo transportation is completed.
In this embodiment, the quench valve 1 is closed by another closure member, such as the screw member 11 (which may comprise a bolt and nut) shown in fig. 2, during air transportation. After the air transportation is finished, the closing part of the quench valve 1 is removed to restore the valve body function of the quench valve 1.
In this embodiment, the quench valve 1, the primary vent valve 2 and the secondary vent valve 3 are all in direct communication with the cryogen vessel (not shown) through the housing 41 of the service tower 4 which is in communication with the cryogen vessel.
The embodiment of the utility model provides a pressure control system can include the superconducting magnet safety exhaust system of any above-mentioned realization form.
The embodiment of the present invention provides a magnetic resonance imaging apparatus, which can include the above pressure control system.
It can be seen that the utility model discloses in will assist discharge valve when the air transportation in order to communicate the refrigerant container with the mode that connects in parallel with main discharge valve, that is to say, assist and do not have other valve bodies between discharge valve and the refrigerant container to can guarantee to assist 13 psi's of discharge valve to set for and open gauge pressure, can satisfy the safe exhaust requirement of superconducting magnet when the air transportation. Furthermore, the auxiliary vent valve can be functionally disabled, i.e. the valve body function of the auxiliary vent valve is removed, without reducing the pressure of the cryogen vessel after the air freight is finished. For example, when the auxiliary discharge valve is integrated on the main discharge valve in parallel with the main discharge valve, by directly closing the auxiliary discharge valve after the end of the air transportation, the valve body function of the auxiliary discharge valve can be removed without removing the auxiliary discharge valve without lowering the pressure of the refrigerant container. For another example, when the auxiliary vent valve is mounted on the refrigerant inlet of the refrigerant container during air transportation, the auxiliary vent valve can be detached from the refrigerant inlet only after the air transportation is finished, the operation does not need to reduce the pressure of the refrigerant container, and the operation can allow an operator to be instantly contacted with the refrigerant gas but is allowed in a safe range.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A safe exhaust system for a superconducting magnet, comprising: a main exhaust valve (2) and an auxiliary exhaust valve (3); wherein,
the main exhaust valve (2) is directly communicated with a cryogen vessel in which the superconducting magnet is placed;
the auxiliary vent valve (3) is in direct communication with the cryogen vessel in parallel with the main vent valve (2);
the set opening gauge pressure of the auxiliary exhaust valve (3) is smaller than the set opening absolute pressure of the main exhaust valve (2).
2. The safety exhaust system according to claim 1, further comprising: a connecting passage in direct communication with said cryogen vessel; the connecting channel has a first port and a second port; the first port is connected with the main exhaust valve (2); the second port is connected with the auxiliary exhaust valve (3).
3. The safety vent system according to claim 2, further comprising a first closure member at the end of the secondary vent valve (3).
4. The safety vent system of claim 3, wherein said first closure member is a plug.
5. The safety vent system according to claim 1, wherein the auxiliary vent valve (3) is detachably mounted on the refrigerant injection port (411) so as to directly communicate with the refrigerant container.
6. The safety vent system according to any one of claims 1 to 5, further comprising a quench valve (1) and a second closure, the quench valve (1) being closed by the second closure.
7. A pressure control system comprising a superconducting magnet safety vent system as claimed in any of claims 1 to 6.
8. A magnetic resonance imaging apparatus, characterized in that it comprises a pressure control system as claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520938242.5U CN205122322U (en) | 2015-11-23 | 2015-11-23 | Superconducting magnet safety exhaust system , pressure control system and magnetic resonance imaging equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520938242.5U CN205122322U (en) | 2015-11-23 | 2015-11-23 | Superconducting magnet safety exhaust system , pressure control system and magnetic resonance imaging equipment |
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| Publication Number | Publication Date |
|---|---|
| CN205122322U true CN205122322U (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520938242.5U Active CN205122322U (en) | 2015-11-23 | 2015-11-23 | Superconducting magnet safety exhaust system , pressure control system and magnetic resonance imaging equipment |
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| CN (1) | CN205122322U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952033A (en) * | 2020-08-20 | 2020-11-17 | 合肥中科离子医学技术装备有限公司 | Gas discharge system for superconducting magnet system |
-
2015
- 2015-11-23 CN CN201520938242.5U patent/CN205122322U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952033A (en) * | 2020-08-20 | 2020-11-17 | 合肥中科离子医学技术装备有限公司 | Gas discharge system for superconducting magnet system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |