A radio frequency coil inductance adjustment device for mass spectrometry

Abstract

The present invention relates to the technical field of coil inductance adjustment, and discloses a radio frequency coil inductance adjustment device for mass spectrometry, comprising a winding ring, an inner coil and an outer coil are respectively wound around the outside of the winding ring, a circular ring is fixedly installed in the middle of the inner wall of the winding ring, an inner adjustment rod is threadedly connected to the middle of the circular ring, and an outer adjustment rod is connected to the inside of the inner adjustment rod. The present invention adjusts the inductance of the inner coil by adding a magnetic ring to the inner adjustment rod and moving the position of the magnetic ring in the coil, and adjusts the inductance of the outer coil by adding a magnetic ring to the outer adjustment rod and moving the position of the magnetic ring in the coil. The whole process is easy to operate, and the inner adjustment rod and the outer adjustment rod are connected and separated by a connecting assembly, so that when the positions of the inner adjustment rod and the outer adjustment rod are adjusted, the inner adjustment rod and the outer adjustment rod do not interfere with each other, thereby making it easier to perform the adjustment operation.

Description

Technical Field

[0001] The invention belongs to the technical field of coil inductance adjustment, and in particular relates to a radio frequency coil inductance adjustment device for mass spectrometry. Background Art

[0002] The radio frequency coil primarily consists of an RF transmitter system, a radio frequency coil, and a signal receiver system. It is a crucial component of magnetic resonance imaging systems. All MRI scans rely on the coil, and its operating condition directly impacts image quality. Therefore, proper use and maintenance are crucial to extending coil life, maintaining coil stability, and obtaining high-quality images.

[0003] Current RF coils generally have fixed inductance. Adjusting the inductance requires adjusting the number of coil turns and winding diameter, which is very troublesome. The inductance cannot be easily adjusted during application, making the inductor coil processing very complex and the consistency very poor. Summary of the Invention

[0004] In view of the above problems, the present invention provides a device for adjusting the inductance of a radio frequency coil for mass spectrometry to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device for adjusting the inductance of a radio frequency coil for mass spectrometry comprises a winding ring, an inner coil and an outer coil are respectively wound around the outside of the winding ring, a circular ring is fixedly mounted on the middle portion of the inner wall of the winding ring, an inner adjustment rod is threadedly connected to the middle portion of the circular ring, an outer adjustment rod is connected to the inside of the inner adjustment rod, a rectangular block is provided at one end of the outer adjustment rod away from the inner adjustment rod, a magnetic ring is fixedly sleeved on the outside of the rectangular block and the outside of the inner adjustment rod, a socket is provided on the outside of the rectangular block, and the inner and outer adjustment rods are connected by a connecting assembly.

[0007] Furthermore, the connecting assembly includes four arc panels, the inner adjusting rod is provided with a movable groove at one end close to the outer adjusting rod, the four arc panels are arranged in the movable groove, the inner wall of the movable groove on the side away from the outer adjusting rod is provided with a sliding groove corresponding to the arc panel, a slider is slidably installed in the sliding groove, the slider is fixedly connected to the corresponding arc panel, a limit rod is fixedly installed on the inner wall of the sliding groove, the slider is slidably sleeved outside the limit rod, the outside of the slider is provided with a driving assembly for driving it to move along the sliding groove, the outer side of the outer adjusting rod is provided with threaded teeth, the inner side of the arc panel is provided with threads matching the threaded teeth, and the outside of the outer adjusting rod is provided with a positioning assembly for positioning it.

[0008] The cam is connected to the sliding seat of the sliding seat and the sliding seat is fixedly mounted on the sliding seat, and the sliding seat is connected to the sliding seat by a connecting rod.

[0009] Furthermore, the fixing assembly includes a pull plate, a movable groove is provided on the outer side of the inner adjusting rod, the pull plate is slidably arranged in the movable groove, the side of the pull plate away from the fixed block is fixedly connected to the inner wall of the movable groove through a second spring, the side of the fixed block close to the pull plate is provided with a card slot, and the side of the pull plate close to the card slot is fixedly installed with a card plate that cooperates with the card slot.

[0010] Furthermore, the positioning assembly includes a connecting plate, which is arranged in a rectangular shape. A transverse groove cooperating with the connecting plate is provided on the side of the rectangular block close to the external adjusting rod. The connecting plate is slidably arranged in the transverse groove. The end of the connecting plate away from the external adjusting rod is fixedly connected to the inner wall of the transverse groove through a third spring. The connecting plate is fixedly connected to one end of the external adjusting rod, and an adsorption assembly is provided on the outside of the connecting plate for adsorbing and fixing it.

[0011] Furthermore, the adsorption assembly includes an electromagnet, a mounting groove is provided on the bottom wall of the transverse groove, the electromagnet is fixed in the mounting groove, the connecting plate is made of iron, a push rod is fixedly installed on the side of the pull plate away from the fixed block, the inner wall of the movable groove is provided with a push switch corresponding to the push rod, and the side of the fixed block away from the external adjustment rod is provided with a wireless controller that cooperates with the push switch to control the power on and off of the electromagnet.

[0012] Furthermore, the spring constant of the first spring is greater than the spring constant of the third spring.

[0013] Furthermore, the magnetic ring is in contact with the inner wall of the winding ring, and the friction between the magnetic ring and the winding ring is sufficient to maintain the rectangular block and the magnetic ring in a static state when the outer adjusting rod and the connecting plate move to squeeze and stretch the third spring.

[0014] Technical effects and advantages of the present invention:

[0015] 1. The present invention adjusts the inductance of the inner coil by adding a magnetic ring to the inner adjustment rod and moving the position of the magnetic ring in the coil, and adjusts the inductance of the outer coil by adding a magnetic ring to the outer adjustment rod and moving the position of the magnetic ring in the coil. The whole process is easy to operate;

[0016] 2. The present invention connects and separates the inner and outer adjusting rods through a connecting assembly, so that when adjusting the positions of the inner and outer adjusting rods, the inner and outer adjusting rods do not interfere with each other, thereby making the adjustment operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a radio frequency coil inductance adjustment device for mass spectrometry according to an embodiment of the present invention is shown;

[0018] Figure 2 A schematic cross-sectional view of an inductance adjustment device for a radio frequency coil for mass spectrometry according to an embodiment of the present invention is shown;

[0019] Figure 3 The embodiment of the present invention is shown Figure 2 A in the middle is an enlarged structural diagram;

[0020] Figure 4 The embodiment of the present invention is shown Figure 2 The enlarged structural diagram at B in the middle;

[0021] Figure 5 A schematic diagram showing a partial structure of an embodiment of the present invention Figure 1 ;

[0022] Figure 6 A schematic diagram showing a partial structure of an embodiment of the present invention Figure 2 ;

[0023] Figure 7 A schematic diagram showing a partial structure of an embodiment of the present invention Figure 3 ;

[0024] In the figure: 1. Winding ring; 2. Inner coil; 3. Outer coil; 4. Circular ring; 5. Inner adjustment rod; 6. Outer adjustment rod; 7. Rectangular block; 8. Magnetic ring; 9. Socket; 10. Arc panel; 11. Push rod; 12. Slider; 13. Limit rod; 14. Movable seat; 15. Connecting rod; 16. Thread; 17. Fixed block; 18. Pull plate; 19. Second spring; 20. Card plate; 21. Connecting plate; 22. Third spring; 23. Electromagnet; 24. Push rod; 25. Push switch; 26. Wireless controller; 27. First spring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0026] The present invention provides a device for adjusting the inductance of a radio frequency coil for mass spectrometry, such as Figures 1 to 7 As shown, it includes a winding ring 1, and the outside of the winding ring 1 is respectively wound with an inner coil 2 and an outer coil 3. The inner coil 2 and the outer coil 3 are both radio frequency coils for mass spectrometry, referred to as inductor coils. A circular ring 4 is fixedly installed in the middle of the inner wall of the winding ring 1, and an inner adjusting rod 5 is threadedly connected to the middle of the circular ring 4. The inner adjusting rod 5 is connected to the outer adjusting rod 6. A rectangular block 7 is provided at the end of the outer adjusting rod 6 away from the inner adjusting rod 5. The outside of the rectangular block 7 and the outside of the inner adjusting rod 5 are fixedly sleeved with a magnetic ring 8. The outside of the rectangular block 7 is provided with a socket 9, and the inner adjusting rod 5 and the outer adjusting rod 6 are connected by a connecting component.

[0027] When in use, insert the tool into the socket 9 and rotate the rectangular block 7 to rotate it with the connected magnetic ring 8 and the outer adjusting rod 6 and move it in the direction close to the inner adjusting rod 5 to adjust the position of the magnetic ring 8 inside the outer coil 3 and adjust the inductance of the outer coil 3. Similarly, rotate the inner adjusting rod 5 to move it with the connected magnetic ring 8 along the circular ring 4 to adjust the position of the magnetic ring 8 inside the inner coil 2, making it easy to adjust the inductance of the inner coil 2 and the outer coil 3. The magnetic ring 8 is provided in the internal position of the winding ring 1 to form a magnetic core, which cooperates with the coil to increase the inductance. When it is necessary to fine-tune the position of the magnetic ring 8 on the inner adjusting rod 5, the connecting component separates the inner adjusting rod 5 from the outer adjusting rod 6, so that when adjusting the position of the inner adjusting rod 5, it will not affect the position of the outer adjusting rod 6. When the adjustment is completed, the connecting component connects the inner adjusting rod 5 to the outer adjusting rod 6 again. When it is necessary to adjust the outer adjusting rod 6, just rotate the outer adjusting rod 6. Therefore, the inner adjusting rod 5 and the outer adjusting rod 6 do not interfere with each other when adjusting the position, making it easy to adjust.

[0028] The principle of increasing inductance by adding a magnetic core to a coil is mainly based on the concentration and enhancement of the magnetic field by the magnetic core. The magnetic core is usually made of magnetic materials. These materials can concentrate and enhance the magnetic field lines, thereby making the magnetic field generated by the coil more concentrated and powerful. Since inductance is proportional to the strength of the magnetic field, the enhancement of the magnetic field will lead to an increase in inductance. The influence of the magnetic core on the magnetic field;

[0029] Magnetic domains: There are many small areas inside magnetic materials, called magnetic domains. Each magnetic domain contains a large number of atoms, which are arranged like small magnets. When the magnetic material is magnetized, the magnetic domains are arranged in a regular pattern, making the material appear magnetic.

[0030] Magnetic field strength and magnetic induction strength: A energized solenoid coil generates a magnetic field strength H. When inserted into a magnetic core, the magnetic domains inside the core are magnetized, generating their own magnetic field M. The superposition of these two magnetic fields forms a magnetic induction strength B, B=μ0(H+M), where μ0 is the magnetic permeability of a vacuum.

[0031] Magnetic permeability is a physical quantity that measures a material's ability to influence the magnetic field. Materials with high magnetic permeability can more effectively gather and conduct magnetic fields, making the magnetic field more concentrated, thereby reducing the diffusion and loss of the magnetic field.

[0032] like Figures 2 to 4 As shown, the connecting component includes four arc panels 10, and a movable groove is provided at one end of the inner adjusting rod 5 close to the outer adjusting rod 6. The four arc panels 10 are arranged in the movable groove, and a sliding groove corresponding to the arc panel 10 is provided on the inner wall of the movable groove away from the outer adjusting rod 6. A slider 12 is slidably installed in the sliding groove, and the slider 12 is fixedly connected to the corresponding arc panel 10. A limiting rod 13 is fixedly installed on the inner wall of the sliding groove, and the slider 12 is slidably sleeved on the outside of the limiting rod 13. The outside of the slider 12 is provided with a driving component for driving it to move along the sliding groove, the outer side of the outer adjusting rod 6 is provided with threaded teeth, and the inner side of the arc panel 10 is provided with a thread 16 matching the threaded teeth, and the outside of the outer adjusting rod 6 is provided with a positioning component for positioning it.

[0033] The arc panel 10 is completely reset, and then the positioning assembly positions the position of the outer adjusting rod 6 to fix it.

[0034] like Figures 2 to 4As shown, the driving assembly includes a push rod 11, a movable cavity is provided in the middle of the inner adjusting rod 5, and the movable cavity is connected to the slide groove. The push rod 11 is slidably arranged in the movable cavity, and a movable seat 14 is fixedly installed on one end of the push rod 11 close to the slider 12 and the side of the slider 12 close to the push rod 11. The relative movable seats 14 are connected by a connecting rod 15, and the connecting rod 15 is rotatably connected to the movable seat 14. A rectangular groove communicating with the movable cavity is provided in the middle of the end of the inner adjusting rod 5 away from the outer adjusting rod 6, and a matching fixed block 17 is slidably installed in the rectangular groove. The fixed block 17 is fixedly connected to the push rod 11, and a bayonet is provided on the middle part of the outer side of the fixed block 17. A first spring 27 is provided on the outside of the push rod 11 and between the fixed block 17 and the rectangular groove. The two ends of the first spring 27 are fixedly connected to the inner wall of the rectangular groove and the fixed block 17 respectively, and a fixing component for fixing it is provided on the outside of the fixed block 17.

[0035] Cancel the fixation of the fixing assembly on the fixing block 17, insert the tool into the bayonet, and then squeeze the fixing block 17 so that it moves with the push rod 11 in the direction close to the outer adjusting rod 6. At the same time, the fixing block 17 compresses the first spring 27 to deform it. As the push rod 11 moves, the movable seat 14 and the connecting rod 15 move with the slider 12 and the arc panel 10, so that the multiple arc panels 10 move away from each other. Then, the tool is rotated to cooperate with the bayonet to drive the fixing block 17 to rotate, and then rotate the inner adjusting rod 5 to adjust its position. The tool is a screwdriver that cooperates with the bayonet and the socket 9. Remove the tool, and the compressed first spring 27 releases the force to reset the fixing block 17. Contrary to the above principle, the reset of multiple arc panels 10 can be achieved.

[0036] like Figure 4 As shown, the fixing assembly includes a pull plate 18, a movable groove is provided on the outer side of the inner adjusting rod 5, the pull plate 18 is slidably set in the movable groove, the side of the pull plate 18 away from the fixed block 17 is fixedly connected to the inner wall of the movable groove through the second spring 19, and a card slot is provided on the side of the fixed block 17 close to the pull plate 18, and a card plate 20 that cooperates with the card slot is fixedly installed on the side of the pull plate 18 close to the card slot.

[0037] Pull the pull plate 18 so that it moves with the card plate 20 in the direction away from the card slot, so that the card plate 20 leaves the card slot. When the pull plate 18 moves, the second spring 19 is compressed to deform it and generate a force, and then the fixed block 17 is pushed toward the direction close to the outer adjustment rod 6, so that the card slot and the card plate 20 are staggered. When the fixed block 17 is reset, the card plate 20 is aligned with the card slot, and the compressed second spring 19 releases the force to reset the pull plate 18 and the card plate 20, so that the card plate 20 enters the card slot, thereby fixing the fixed block 17.

[0038] like Figure 2As shown, the positioning assembly includes a connecting plate 21, which is set to a rectangular shape. A transverse groove that cooperates with the connecting plate 21 is opened on the side of the rectangular block 7 close to the outer adjusting rod 6. The connecting plate 21 is slidably set in the transverse groove. The end of the connecting plate 21 away from the outer adjusting rod 6 is fixedly connected to the inner wall of the transverse groove through a third spring 22. The connecting plate 21 is fixedly connected to one end of the outer adjusting rod 6, and an adsorption assembly for adsorbing and fixing it is provided on the outside of the connecting plate 21.

[0039] When the card plate 20 is completely out of the card slot, the adsorption component cancels the adsorption and fixation of the connecting plate 21, and the connecting plate 21 and the outer adjustment rod 6 can move horizontally. When the arc panel 10 is reset, its thread 16 squeezes the thread teeth of the outer adjustment rod 6, so that the outer adjustment rod 6 and the connecting plate 21 can be driven to move horizontally, thereby compressing or stretching the third spring 22. When the arc panel 10 is separated from the outer adjustment rod 6 next time, the third spring 22 is reset, so that the connecting plate 21 and the outer adjustment rod 6 are reset.

[0040] like Figure 2 and Figure 4 As shown, the adsorption component includes an electromagnet 23, a mounting groove is provided on the bottom wall of the horizontal groove, the electromagnet 23 is fixed in the mounting groove, the connecting plate 21 is made of iron, a push rod 24 is fixedly installed on the side of the pull plate 18 away from the fixed block 17, and a push switch 25 corresponding to the push rod 24 is provided on the inner wall of the movable groove. A wireless controller 26 is provided on the side of the fixed block 17 away from the outer adjustment rod 6 for cooperating with the push switch 25 to control the power on and off of the electromagnet 23.

[0041] The card plate 20 is completely out of the card slot. At this time, the pull plate 18 carries the push rod 24 to press the push switch 25, and cooperates with the wireless controller 26 to drive the electromagnet 23 to cut off the power, so that it loses its magnetism and loses its fixation to the connecting plate 21. When the card plate 20 is reset, the pressing of the push switch 25 is canceled. At this time, the wireless controller 26 drives the electromagnet 23 to energize it so that it has magnetism, so that the electromagnet 23 fixes the connecting plate 21, thereby fixing the external adjustment rod 6.

[0042] like Figure 2 As shown, the spring constant of the first spring 27 is greater than the spring constant of the third spring 22 .

[0043] The force provided by the first spring 27 can ensure that the outer adjustment rod 6 and the connecting plate 21 move in cooperation with the thread 16 and the thread teeth during the resetting process of the arc panel 10, thereby compressing or stretching the third spring 22.

[0044] like Figure 2 As shown, the magnetic ring 8 is in contact with the inner wall of the winding ring 1, and the friction between the magnetic ring 8 and the winding ring 1 is sufficient to maintain the rectangular block 7 and the magnetic ring 8 in a stationary state when the outer adjusting rod 6 and the connecting plate 21 move to squeeze and stretch the third spring 22.

[0045] Working principle: When in use, insert the tool into the socket 9, rotate the rectangular block 7 to rotate the connected magnetic ring 8, connecting plate 21, and outer adjusting rod 6 and move it in the direction close to the inner adjusting rod 5, so as to adjust the position of the magnetic ring 8 inside the outer coil 3 and adjust the inductance of the outer coil 3. When adjusting the position of the inner adjusting rod 5, pull the pull plate 18 to move it with the card plate 20 in the direction away from the card slot, so that the card plate 20 leaves the card slot. When the pull plate 18 moves, the second spring 19 is compressed to deform it and generate a force, so that the card plate 20 completely leaves the card slot. At this time, the pull plate 18 presses the push switch 25 with the push rod 24, and cooperates with the wireless controller 26 to drive the electromagnet 23 to cut off the power, so that it loses its magnetism and loses its fixation to the connecting plate 21. At this time The outer adjusting rod 6 and the connecting plate 21 can move freely horizontally. Insert the tool into the bayonet, and then squeeze the fixing block 17 to make it move with the push rod 11 in the direction close to the outer adjusting rod 6. At the same time, the fixing block 17 compresses the first spring 27 to deform it. With the movement of the push rod 11, the movable seat 14 and the connecting rod 15 move with the slider 12 and the arc panel 10, so that the multiple arc panels 10 move away from each other, thereby canceling the contact state between the outer adjusting rod 6 and the thread 16 leaving the thread tooth. Due to the movement of the fixing block 17, the card slot and the card plate 20 are staggered. Then the tool is rotated to cooperate with the bayonet to drive the fixing block 17 to rotate, and then the inner adjusting rod 5 is rotated to adjust its position, so that it moves along the ring 4 with the connected magnetic ring 8, thereby achieving the magnetic ring 8 When adjusting the internal position of the inner coil 2, since the inner adjusting rod 5 is separated from the outer adjusting rod 6, when adjusting the position of the inner adjusting rod 5, it will not affect the position of the outer adjusting rod 6. When the adjustment is completed, the tool is removed, and the compressed first spring 27 releases the force to carry out the reset movement with the fixing block 17. Contrary to the above principle, the arc panel 10 is reset accordingly, so that it contacts the outer adjusting rod 6 again to wrap it. If the thread teeth and the thread 16 are not aligned at this time, the arc panel 10 can cooperate with the arc surface of the thread 16 itself to squeeze the arc surface of the thread teeth itself, so as to drive the outer adjusting rod 6 to move horizontally. When the arc panel 10 is reset, it cooperates with its thread 16 to squeeze the thread teeth of the outer adjusting rod 6, so as to drive the outer adjusting rod 6 and the connecting plate 2 1 moves horizontally, thereby compressing or stretching the third spring 22. Due to the friction between the magnetic ring 8 and the inner wall of the winding ring 1, the magnetic ring 8 remains stationary, so that the thread teeth are aligned with the thread 16, and the thread teeth are embedded in the thread 16, completing the complete reset of the arc panel 10. As the arc panel 10 is reset, the fixed block 17 is completely reset, the slot is aligned with the card plate 20, and the compressed second spring 19 releases the force to carry the pulling plate 18 and the card plate 20 to reset, so that the card plate 20 enters the slot, thereby fixing the fixed block 17, so that the push rod 24 cancels the pressing of the press switch 25. At this time, the wireless controller 26 drives the electromagnet 23 to energize it to make it magnetic, so that the electromagnet 23 fixes the connecting plate 21, thereby fixing the external adjustment rod 6.This makes it easier to adjust the inductance of the inner coil 2 and the outer coil 3, and during the adjustment process, the inner adjustment rod 5 and the outer adjustment rod 6 do not interfere with each other, making the adjustment operation more convenient.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A radio frequency coil inductance adjustment device for mass spectrometry, comprising a winding ring (1), characterized in that: The outer part of the winding ring (1) is respectively wound with an inner coil (2) and an outer coil (3); a circular ring (4) is fixedly mounted in the middle of the inner wall of the winding ring (1); an inner adjusting rod (5) is threadedly connected to the middle of the circular ring (4); an outer adjusting rod (6) is connected to the inner part of the inner adjusting rod (5); a rectangular block (7) is provided at one end of the outer adjusting rod (6) away from the inner adjusting rod (5); a magnetic ring (8) is fixedly sleeved on the outer part of the rectangular block (7) and the outer part of the inner adjusting rod (5); a socket (9) is provided on the outer side of the rectangular block (7); and the inner adjusting rod (5) and the outer adjusting rod (6) are connected via a connecting assembly; The connecting component comprises four arc panels (10), one end of the inner adjustment rod (5) close to the outer adjustment rod (6) is provided with a movable groove, the four arc panels (10) are arranged in the movable groove, the inner wall of the movable groove away from the outer adjustment rod (6) is provided with a sliding groove corresponding to the arc panel (10), a slider (12) is slidably installed in the sliding groove, the slider (12) is fixedly connected to the corresponding arc panel (10), a limit rod (13) is fixedly installed on the inner wall of the sliding groove, the slider (12) is slidably sleeved outside the limit rod (13), the outside of the slider (12) is provided with a driving component for driving it to move along the sliding groove, the outer side of the outer adjustment rod (6) is provided with thread teeth, the inner side of the arc panel (10) is provided with a thread (16) matching the thread teeth, and the outside of the outer adjustment rod (6) is provided with a positioning component for positioning it; The driving assembly comprises a push rod (11), a movable cavity is provided in the middle of the inner adjustment rod (5), the movable cavity is communicated with the slide groove, the push rod (11) is slidably arranged in the movable cavity, a movable seat (14) is fixedly installed on one end of the push rod (11) close to the slider (12) and on one side of the slider (12) close to the push rod (11), the movable seats (14) opposite to each other are connected by a connecting rod (15), the connecting rod (15) is rotatably connected to the movable seat (14), and the inner adjustment rod (5) is away from the outer adjustment rod (6). A rectangular groove communicating with the movable cavity is provided in the middle of one end, a matching fixed block (17) is slidably installed in the rectangular groove, the fixed block (17) is fixedly connected to the push rod (11), a bayonet is provided in the middle of the outer side of the fixed block (17), a first spring (27) is provided outside the push rod (11) and between the fixed block (17) and the rectangular groove, two ends of the first spring (27) are respectively fixedly connected to the inner wall of the rectangular groove and the fixed block (17), and a fixing component for fixing the fixed block (17) is provided outside the fixed block (17).

2. The device for adjusting the inductance of a radio frequency coil for mass spectrometry according to claim 1, characterized in that: The fixing assembly comprises a pull plate (18), a movable groove is provided on the outer side of the inner adjustment rod (5), the pull plate (18) is slidably arranged in the movable groove, a side of the pull plate (18) away from the fixing block (17) is fixedly connected to the inner wall of the movable groove via a second spring (19), a side of the fixing block (17) close to the pull plate (18) is provided with a clamping groove, and a clamping plate (20) matching the clamping groove is fixedly installed on the side of the pull plate (18) close to the clamping groove.

3. The device for adjusting the inductance of a radio frequency coil for mass spectrometry according to claim 2, characterized in that: The positioning assembly comprises a connecting plate (21), the connecting plate (21) being arranged in a rectangular shape, a transverse groove cooperating with the connecting plate (21) being provided on a side of the rectangular block (7) close to the outer adjusting rod (6), the connecting plate (21) being slidably arranged in the transverse groove, an end of the connecting plate (21) away from the outer adjusting rod (6) being fixedly connected to an inner wall of the transverse groove via a third spring (22), the connecting plate (21) being fixedly connected to one end of the outer adjusting rod (6), and an adsorption assembly for adsorbing and fixing the connecting plate (21) being provided on the outside.

4. The device for adjusting the inductance of a radio frequency coil for mass spectrometry according to claim 3, characterized in that: The adsorption assembly comprises an electromagnet (23), a mounting groove is provided on the bottom wall of the transverse groove, the electromagnet (23) is fixed in the mounting groove, the connecting plate (21) is made of iron, a push rod (24) is fixedly installed on the side of the pull plate (18) away from the fixed block (17), a push switch (25) corresponding to the push rod (24) is provided on the inner wall of the movable groove, and a wireless controller (26) is provided on the side of the fixed block (17) away from the outer adjustment rod (6) for cooperating with the push switch (25) to control the power on and off of the electromagnet (23).

5. The device for adjusting the inductance of a radio frequency coil for mass spectrometry according to claim 4, characterized in that: The stiffness coefficient of the first spring (27) is greater than the stiffness coefficient of the third spring (22).

6. The device for adjusting the inductance of a radio frequency coil for mass spectrometry according to claim 5, characterized in that: The magnetic ring (8) is in contact with the inner wall of the winding ring (1), and the friction force between the magnetic ring (8) and the winding ring (1) is sufficient to maintain the rectangular block (7) and the magnetic ring (8) in a stationary state when the outer adjustment rod (6) and the connecting plate (21) move to squeeze and stretch the third spring (22).

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