CN114572669A - Conveying device for monitoring nuclear magnetic liquid helium leakage monitoring alarm module - Google Patents
Conveying device for monitoring nuclear magnetic liquid helium leakage monitoring alarm module Download PDFInfo
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- CN114572669A CN114572669A CN202210478233.7A CN202210478233A CN114572669A CN 114572669 A CN114572669 A CN 114572669A CN 202210478233 A CN202210478233 A CN 202210478233A CN 114572669 A CN114572669 A CN 114572669A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Mechanical Engineering (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
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Abstract
The invention relates to the technical field of nuclear magnetic helium monitoring auxiliary equipment, in particular to a conveying device for a monitoring and alarming module for monitoring nuclear magnetic liquid helium leakage. The conveying device for monitoring the nuclear magnetic liquid helium leakage monitoring and alarming module comprises the arc-shaped guide sliding groove and the arc-shaped adjusting block which are symmetrically arranged, the arc-shaped adjusting block is controlled by the adjusting motor to move in the arc-shaped guide sliding groove, and the helium sensor module which is positioned on the inner top surface of the arc-shaped guide sliding groove is matched, so that the conveying device can automatically start to operate and warn a leakage point when liquid helium leaks, the control mode is very simple and efficient, and the monitoring is very accurate; conveyor makes things convenient for the dismouting by the arc regulating block that is located arc direction spout with be located the split type constitution of nuclear-magnetism equipment outlying outside assembly frame, the later maintenance use of being convenient for.
Description
Technical Field
The invention relates to the technical field of nuclear magnetic helium monitoring auxiliary equipment, in particular to a conveying device for a monitoring and alarming module for monitoring leakage of nuclear magnetic liquid helium.
Background
Nuclear magnetic resonance is a physical process in which nuclei with non-zero magnetic moments undergo zeeman splitting at a spin energy level under the action of an external magnetic field, and resonate to absorb radio-frequency radiation of a certain frequency. Nuclear magnetic resonance spectroscopy is a branch of spectroscopy in which the resonance frequency is in the radio frequency band and the corresponding transition is the transition of the nuclear spins at the nuclear zeeman energy level.
Magnetic resonance imaging examination has become a common image examination method, and magnetic resonance imaging, as a novel image examination technology, has no influence on human health, but six groups of people are not suitable for magnetic resonance examination, namely: a person installing a cardiac pacemaker, a person with or suspected of having a metallic foreign body in an eyeball, a person ligating an aneurysm silver clip, a person retaining an in vivo object or a metallic prosthesis, a critically ill patient with life risk, a claustrophobic patient, and the like. The monitoring instrument, the rescue equipment and the like cannot be brought into the nuclear magnetic resonance examination room. In addition, the pregnant women who are less than 3 months pregnant preferably do not need nuclear magnetic resonance examination.
Liquid helium is one of very important materials in nuclear magnetic equipment, because its chemical property limits, the leakproofness of liquid helium is very important to equipment operating stability, and the most fixed structures of liquid helium monitoring facilities who is applied to nuclear magnetic equipment on the market at present lack the conveyor who is used for carrying monitoring alarm module, lead to the monitoring scope very limited, can't instruct the position of leaking the point automatically fast moreover, lead to the later stage monitoring degree of difficulty great.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problem that exists among the above-mentioned background art, provide a modified a conveyor that is used for monitoring nuclear magnetic liquid helium and reveals monitoring alarm module, solve and be applied to the most fixed structures of liquid helium monitoring facilities of nuclear magnetic equipment on the market at present, lack the conveyor that is used for carrying monitoring alarm module, the scope that leads to the monitoring is very limited, can't instruct the position of revealing the point automatically fast moreover, lead to the bigger problem of the later stage monitoring degree of difficulty.
The technical scheme adopted by the invention for solving the technical problems is as follows: a conveying device for monitoring a nuclear magnetic liquid helium leakage monitoring alarm module comprises nuclear magnetic equipment, arc-shaped guide sliding grooves symmetrically formed in the outer walls of two sides of the nuclear magnetic equipment, an external assembling frame arranged on the periphery of the nuclear magnetic equipment, an adjusting motor, a helium sensor module, an electric control switch matched with the helium sensor module, a buzzer, an LED warning lamp and a centrifugal cooling fan, wherein an arc-shaped driving tooth socket is formed in the arc-shaped surface of the outer side of each arc-shaped guide sliding groove, an arc-shaped adjusting block used for installing the adjusting motor is assembled in the arc-shaped guide sliding grooves in a sliding mode, an arc-shaped upper transmission port internally provided with a main driving gear is formed in the arc-shaped surface of the upper end of each arc-shaped adjusting block, an internal transmission assembly used for connecting the adjusting motor and the main driving gear in a transmission mode is movably assembled in the arc-shaped adjusting block, two ends of the external assembling frame are fixed to the outer sides of the arc-shaped adjusting blocks, the helium sensor module, the centrifugal cooling fan and the LED warning lamp are fixedly assembled on the external assembly frame, and the electric control switch and the buzzer are installed inside the external assembly tube.
The outer side surface of the arc-shaped adjusting block is provided with an L-shaped structure external assembly pipe for fixing an adjusting motor, the two ends of the external assembly frame are fixedly connected with the arc-shaped adjusting block through sleeves arranged on the outer side of the external assembly pipe, the outer side surface of the external assembly frame is provided with a lateral locking port with a built-in elastic limiting block, and the outer side surface of the external assembly pipe is provided with an outer side limiting clamping groove matched with the elastic limiting block.
The internal transmission assembly comprises an internal threaded shaft tube in meshed transmission with the inner side end of the main driving gear, a first bevel gear coaxially fixed at the top end of the internal threaded shaft tube and a second bevel gear coaxially fixed on the rotating shaft at the inner side of the adjusting motor.
The inside contained angle position of external assembly frame offer the horizontal side direction mounting groove that is used for installing the side direction mounting groove of indulging of helium sensor module and is used for installing the LED warning light.
And a top monitoring fixing groove for installing a helium sensor module is formed in the inner top surface of the arc-shaped guide sliding groove.
The external assembly frame comprises a first lateral fixing frame, a second lateral fixing frame and an intermediate flow guide pipe, wherein the first lateral fixing frame and the second lateral fixing frame are fixed on the outer side of the external assembly pipe, the intermediate flow guide pipe is sleeved between the first lateral fixing frame and the second lateral fixing frame, a lateral flow guide cover used for installing a centrifugal cooling fan is arranged on the outer side surface of the intermediate flow guide pipe, and the first lateral fixing frame and the second lateral fixing frame are close to the side wall of the arc guide sliding groove and are provided with lateral air inlets with built-in detachable metal filter screens.
And the arc inner side surface of the arc adjusting block is provided with a side arc transmission groove internally provided with a guide roller.
The side-mounted arc-shaped transmission groove is characterized in that side extrusion frames used for installing guide rollers are elastically assembled on the inner walls of the two sides of the side-mounted arc-shaped transmission groove, and an arc-shaped limiting transmission groove matched with the guide rollers is formed in the arc-shaped surface of the inner side of the arc-shaped guide sliding groove.
And a lateral dismounting opening communicated with the arc driving tooth groove and the arc limiting transmission groove is formed in the opening position of the outer side of the side arc transmission groove.
The invention has the beneficial effects that:
(1) the conveying device for monitoring the nuclear magnetic liquid helium leakage monitoring and alarming module comprises arc-shaped guide sliding grooves symmetrically formed in two sides of nuclear magnetic equipment and arc-shaped adjusting blocks assembled in the arc-shaped guide sliding grooves in a sliding mode, the arc-shaped adjusting blocks are controlled to move in the arc-shaped guide sliding grooves through adjusting motors, and the conveying device can be automatically started to run when liquid helium leaks by matching with helium sensor modules on the inner top surfaces of the arc-shaped guide sliding grooves, controls the monitoring modules to convey outside the equipment, and warns leakage points at the same time, so that the control mode is very simple and efficient, and the monitoring is very accurate;
(2) the conveying device is composed of an arc-shaped adjusting block positioned in the arc-shaped guide sliding chute and an external assembling frame positioned on the periphery of the nuclear magnetic equipment in a split type, so that the conveying device is convenient to assemble and disassemble and is convenient to maintain and use in the later period;
(3) the helium sensor module, the electric control switch, the buzzer, the centrifugal cooling fan and the LED warning lamp are fixedly assembled on the external assembly frame, an active suction type design is adopted, the positioning accuracy can be improved, and the warning effect is greatly improved by matching with high-pitched sound and light warning;
(4) adopt external structural design, not only can the easy to assemble setting, can directly install the setting in the outside of current nuclear-magnetism equipment moreover, the convenient repacking upgrading.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the mounting end of the arcuate adjustment block of the present invention.
FIG. 3 is an internal cross-sectional view of the mounting end of the arcuate adjustment block and the external mounting frame of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The conveying device for monitoring the nuclear magnetic liquid helium leakage monitoring alarm module shown in the figures 1, 2 and 3 comprises a nuclear magnetic device 1, arc-shaped guide chutes 2 symmetrically arranged on the outer walls of two sides of the nuclear magnetic device 1, an external assembly frame 3 arranged on the periphery of the nuclear magnetic device 1, an adjusting motor 4, a helium sensor module 5, an electric control switch 6 matched with the helium sensor module 5, a buzzer 7, an LED warning lamp 8 and a centrifugal cooling fan 9, wherein an arc-shaped driving tooth socket 10 is arranged on the arc-shaped surface of the outer side of the arc-shaped guide chute 2, an arc-shaped adjusting block 11 used for installing the adjusting motor 4 is slidably assembled in the arc-shaped guide chute 2, an arc-shaped upper transmission port internally provided with a main driving gear 12 is arranged on the arc-shaped surface of the upper end of the arc-shaped adjusting block 11, and an internal transmission component used for connecting the adjusting motor 4 and the main driving gear 12 in a transmission way is movably assembled in the arc-shaped adjusting block 11, the two ends of the external assembly frame 3 are fixed on the outer side of the arc-shaped adjusting block 11, the helium sensor module 5, the centrifugal cooling fan 9 and the LED warning lamp 8 are fixedly assembled on the external assembly frame 3, an L-shaped structure external assembly pipe 13 for fixing the adjusting motor 4 is arranged on the outer side surface of the arc-shaped adjusting block 11, and the electric control switch 6 and the buzzer 7 are installed inside the external assembly pipe 13.
Wherein nuclear magnetism equipment 1, accommodate motor 4, helium sensor module 5, electric control switch 6, bee calling organ 7, LED warning light 8 and centrifugal radiator fan 9 are prior art, obtain through adopting market direct purchase, wherein accommodate motor 4 cooperation inside transmission assembly drives main drive gear 12 and rotates, arc regulating block 11 is along 2 inside rotations of arc direction spout, helium sensor module 5 is arranged in the helium concentration of monitoring the air, when monitoring that helium concentration is too high, helium sensor module 5 transmits the start signal to electric control switch 6, electric control switch 6 control bee calling organ 7 starts, LED warning light 8 becomes red from normal green.
Further, in order to be matched with lateral installation and fixation, an L-shaped structure external assembly pipe 13 used for fixing the adjusting motor 4 is arranged on the outer side surface of the arc adjusting block 11, two ends of the external assembly frame 3 are fixedly connected with the arc adjusting block 11 through being sleeved on the outer side of the external assembly pipe 13, a lateral locking port with a built-in elastic limiting block 14 is formed in the outer side surface of the external assembly frame 3, and an outer limiting clamping groove 15 matched with the elastic limiting block 14 is formed in the outer side surface of the external assembly pipe 13.
Further, in order to cooperate with the internal transmission adjustment, the internal transmission assembly includes an internally threaded shaft tube 16 in mesh transmission with the inner end of the main driving gear 12, a first bevel gear 17 coaxially fixed to the top end of the internally threaded shaft tube 16, and a second bevel gear 18 coaxially fixed to the inner side rotating shaft of the adjustment motor 4.
Further, in order to cooperate with helium monitoring and light warning, a longitudinal lateral mounting groove 19 for mounting the helium sensor module 5 and a transverse lateral mounting groove 20 for mounting the LED warning light 8 are formed in the inner side included angle position of the external assembly frame 3.
Further, in order to adopt different monitoring methods, a top monitoring fixing groove for installing the helium sensor module 5 is formed in the inner top surface of the arc-shaped guide chute 2.
Further, in order to cooperate the dismouting separation and promote the monitoring of initiatively bleeding, external assembly frame 3 is including fixing the fixed frame 21 of first lateral in the external assembly pipe 13 outside, the fixed frame 22 of second lateral and cup joint the honeycomb duct 23 in between the fixed frame 21 of first lateral and the fixed frame 22 of second lateral, in have on the lateral surface of honeycomb duct 23 and be used for installing centrifugal radiator fan 9 side direction kuppe 24, first lateral fixed frame 21 and the fixed frame 22 of second lateral are close to the side wall of arc direction spout 2 and are seted up the side direction air inlet of built-in detachable metal filter screen 25.
Example 1: the liquid helium leakage monitoring and alarming module can be longitudinally arranged at the topmost end, so that a top monitoring fixing groove for installing the helium sensor module 5 is not required to be formed in the inner top surface of the arc-shaped guide sliding groove 2, the centrifugal cooling fan 9 is started in a normal state, heat on two sides of the nuclear magnetic equipment 1 is extracted, the heat dissipation performance of the equipment is improved, once helium is monitored, the centrifugal cooling fan 9 is closed, then the arc-shaped adjusting block 11 drives the external assembling frame 3 to overturn along the periphery of the nuclear magnetic equipment 1, and the leakage position is accurately positioned;
example 2: can adopt liquid helium to reveal monitoring alarm module and transversely set up at the bottom, utilize helium sensor module 5 on the top surface in the arc direction spout 2 to monitor the helium of revealing, in case monitor the helium and reveal, accommodate motor 4 and centrifugal radiator fan 9 start, arc regulating block 11 drives outside assembly frame 3 at this time along the peripheral upset of nuclear magnetic equipment 1, carries out accurate location to the position of leaking.
Further, in order to match with bottom limit, a side arc-shaped transmission groove 27 with a built-in guide roller 26 is formed in the arc-shaped inner side surface of the arc-shaped adjusting block 11.
Further, in order to reduce the bottom transmission friction force in a matching manner, lateral extrusion frames 28 for installing the guide rollers 26 are elastically assembled on the inner walls of the two sides of the bottom side arc-shaped transmission groove 27, and an arc-shaped limit transmission groove 29 matched with the guide rollers 26 is formed in the arc-shaped surface of the inner side of the arc-shaped guide chute 2.
Further, in order to cooperate with the disassembly of the whole monitoring and alarming module, a lateral disassembly opening 30 communicated with the inside of the arc-shaped driving tooth groove 10 and the arc-shaped limiting transmission groove 29 is formed in the opening position of the outer side of the side arc-shaped transmission groove 27.
When the device is installed, the guide roller 26 needs to be extruded into the side arc-shaped transmission groove 27, and then the guide roller is inserted into the arc-shaped guide sliding groove 2 and the arc-shaped driving tooth groove 10 from the side disassembly opening 30, and the disassembly principle is the same.
The conveying device for monitoring the nuclear magnetic liquid helium leakage monitoring and alarming module comprises arc-shaped guide sliding chutes 2 symmetrically arranged on two sides of a nuclear magnetic device 1 and arc-shaped adjusting blocks 11 slidably assembled in the arc-shaped guide sliding chutes 2, wherein the arc-shaped adjusting blocks 11 are controlled by an adjusting motor 4 to move in the arc-shaped guide sliding chutes 2 and matched with helium sensor modules 5 positioned on the inner top surfaces of the arc-shaped guide sliding chutes 2, so that the conveying device can be automatically started and operated when liquid helium leaks, the monitoring modules are controlled to convey outside the device, and meanwhile, leakage points are warned, the control mode is very simple and efficient, and the monitoring is very accurate; the conveying device is composed of an arc-shaped adjusting block 11 positioned in the arc-shaped guide sliding chute 2 and an external assembling frame 3 positioned on the periphery of the nuclear magnetic equipment 1 in a split mode, and is convenient to disassemble and assemble and convenient to maintain and use in a later period; the helium sensor module 5, the electric control switch 6, the buzzer 7, the centrifugal cooling fan 9 and the LED warning lamp 8 are fixedly assembled on the external assembly frame 3, an active suction type design is adopted, the positioning accuracy can be improved, and the warning effect is greatly improved by matching with high-pitched sound and light warning; adopt external structural design, not only can the easy to assemble setting, can directly install the setting in the outside of current nuclear-magnetism equipment 1 moreover, the convenient repacking upgrading.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The utility model provides a conveyor for monitoring nuclear magnetic liquid helium reveals monitoring alarm module, includes nuclear magnetic equipment (1), arc direction spout (2) on nuclear magnetic equipment (1) both sides outer wall are seted up to the symmetry, install in nuclear magnetic equipment (1) outlying external assembly frame (3), accommodate motor (4), helium sensor module (5), with helium sensor module (5) matched with electric control switch (6), bee calling organ (7), LED warning light (8) and centrifugal radiator fan (9), characterized by: the arc guide sliding groove (2) is provided with an arc driving tooth groove (10) on the arc surface at the outer side, the arc guide sliding groove (2) is internally provided with an arc adjusting block (11) used for installing an adjusting motor (4) in a sliding manner, the arc surface at the upper end of the arc adjusting block (11) is provided with an arc upper transmission port of a built-in main driving gear (12), the arc adjusting block (11) is internally movably provided with an internal transmission component used for being in transmission connection with the adjusting motor (4) and the main driving gear (12), the internal transmission component comprises an internal thread shaft tube (16) in meshing transmission with the inner end of the main driving gear (12), a first bevel gear (17) coaxially fixed at the top end of the internal thread shaft tube (16) and a second bevel gear (18) coaxially fixed on the rotating shaft at the inner side of the adjusting motor (4), the two ends of the external assembly frame (3) are fixed at the outer side of the arc adjusting block (11), helium sensor module (5), centrifugal radiator fan (9) and LED warning light (8) fixed assembly outside on assembly frame (3), arc regulating block (11) on the lateral surface have L type structure outside assembly pipe (13) that are used for fixed accommodate motor (4), automatically controlled switch (6) and bee calling organ (7) install inside outside assembly pipe (13).
2. The conveying device for monitoring the nuclear magnetic liquid helium leakage monitoring alarm module as claimed in claim 1, wherein: the outer assembling frame is characterized in that two ends of the outer assembling frame (3) are fixedly connected with the arc-shaped adjusting block (11) through sleeves on the outer side of the outer assembling pipe (13), a lateral locking port with a built-in elastic limiting block (14) is formed in the outer side surface of the outer assembling frame (3), and an outer limiting clamping groove (15) matched with the elastic limiting block (14) is formed in the outer side surface of the outer assembling pipe (13).
3. The conveying device for monitoring the nuclear magnetic liquid helium leakage monitoring alarm module as claimed in claim 1, wherein: the inside contained angle position of outside assembly frame (3) offer and be used for installing indulging of helium sensor module (5) and put side direction mounting groove (19) and be used for installing horizontal side direction mounting groove (20) of LED warning light (8).
4. The conveying device for monitoring the nuclear magnetic liquid helium leakage monitoring alarm module as claimed in claim 1, wherein: and a top monitoring fixing groove for installing a helium sensor module (5) is formed in the inner top surface of the arc-shaped guide sliding groove (2).
5. The conveying device for monitoring the nuclear magnetic liquid helium leakage monitoring and alarming module as claimed in claim 1, wherein the conveying device comprises: the external assembly frame (3) including fix first lateral fixed frame (21), the fixed frame of second lateral (22) in outside assembly pipe (13) outside and cup joint in honeycomb duct (23) between first lateral fixed frame (21) and the fixed frame of second lateral (22), in honeycomb duct (23) lateral surface on have lateral kuppe (24) that are used for installing centrifugal radiator fan (9), first lateral fixed frame (21) and second lateral fixed frame (22) close on the lateral wall of arc guide spout (2) and on set up the lateral air inlet of built-in detachable metal filter screen (25).
6. The conveying device for monitoring the nuclear magnetic liquid helium leakage monitoring alarm module as claimed in claim 1, wherein: the arc-shaped inner side surface of the arc-shaped adjusting block (11) is provided with a side arc-shaped transmission groove (27) internally provided with a guide roller (26).
7. The delivery device of claim 6, wherein the delivery device is used for monitoring the nuclear magnetic liquid helium leakage monitoring alarm module and comprises: the side put arc driving groove (27) on the inner wall of both sides on elasticity be equipped with side direction extrusion frame (28) that are used for installing guide roller (26), arc guide chute (2) inboard arcwall on seted up with guide roller (26) matched with spacing driving groove of arc (29).
8. The delivery device of claim 7, wherein the delivery device is configured to monitor a nuclear magnetic liquid helium leak monitoring alarm module, and further comprises: and a lateral dismounting opening (30) communicated with the inside of the arc-shaped driving tooth groove (10) and the arc-shaped limiting transmission groove (29) is formed in the opening position of the outer side of the side arc-shaped transmission groove (27).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210478233.7A CN114572669B (en) | 2022-05-05 | 2022-05-05 | Conveying device for monitoring nuclear magnetic liquid helium leakage monitoring and alarming module |
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| CN202210478233.7A CN114572669B (en) | 2022-05-05 | 2022-05-05 | Conveying device for monitoring nuclear magnetic liquid helium leakage monitoring and alarming module |
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| CN114572669B CN114572669B (en) | 2022-09-02 |
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