Nuclear magnetic resonance experimental instrument

Abstract

The utility model relates to a nuclear magnetic resonance experimental instrument, which comprises an instrument main body, a rear chamber is formed on the back surface of the instrument main body, a communication port is formed in the middle of the rear chamber, the nuclear magnetic resonance experimental instrument further comprises a flip cover assembly, and the flip cover assembly is movably connected in the rear chamber, so that the flip cover assembly can cover the communication port. The flip cover assembly comprises a cover plate, a rotating shaft and at least one group of supporting structures, the rotating shaft penetrates through the upper end of the cover plate and is fixedly connected with the inner wall of the rear chamber, the cover plate is rotatably arranged on the rotating shaft in a sleeving manner, and the at least one group of supporting structures are mounted at the inner bottom of the rear chamber; the supporting structure is provided with a movable part which can deflect and stretch out and draw back. Through the arrangement of the flip cover assembly in the rear chamber on the back of the instrument main body, when the instrument main body does not need to inject and add liquid nitrogen, the communication port can be shielded by the flip cover assembly, so that impurities are prevented from entering the communication port to block and influence subsequent liquid nitrogen addition, and the safety and the stability of equipment use are improved.

Description

Technical Field

[0001] The present application relates to the technical field of spectrometer equipment, and in particular to a nuclear magnetic resonance experimental instrument. Background Art

[0002] At present, nuclear magnetic resonance is increasingly used in many fields. Among them, the main work of nuclear magnetic resonance spectrometer is to observe the correspondence between organic chemical structure and relevant characteristic information of nuclear magnetic resonance spectrum, which is an important tool for chemical structure analysis.

[0003] The primary purpose of maintaining a nuclear magnetic resonance spectrometer is to maintain the superconductivity of the magnet, so it is necessary to regularly add liquid helium and liquid nitrogen. Generally, the filling cycle of liquid nitrogen is one to two weeks, and the filling cycle of liquid helium is three to six months. The filling cycle of the magnet varies slightly according to different models of nuclear magnetic resonance spectrometers. If liquid nitrogen is not added in time, the evaporation rate of liquid helium will be accelerated, and the magnet will lose superconductivity in severe cases. The addition port of the existing nuclear magnetic resonance spectrometer for adding liquid nitrogen is prone to the entry of debris when it is not connected to an external liquid nitrogen storage tank. For this reason, we propose a nuclear magnetic resonance experimental instrument to improve the above problem. Utility Model Content

[0004] In order to improve the problem that foreign matter is easily introduced into the addition port of a nuclear magnetic resonance spectrometer for injecting and adding liquid nitrogen when the instrument is not connected to an external liquid nitrogen storage tank, the present application provides a nuclear magnetic resonance experimental instrument.

[0005] The present application provides a nuclear magnetic resonance experimental instrument adopting the following technical solution:

[0006] A nuclear magnetic resonance experiment instrument comprises an instrument body, a rear chamber is formed on the back of the instrument body, a connecting port is arranged in the middle of the rear chamber, and a flip cover assembly is movably connected in the rear chamber so that the flip cover assembly can cover the connecting port.

[0007] Wherein, the flip cover assembly includes a cover plate, a rotating shaft, and at least one group of supporting structures, wherein the rotating shaft passes through the upper end of the cover plate and is fixedly connected to the inner wall of the rear chamber, the cover plate is rotatably mounted on the rotating shaft, and at least one group of supporting structures is installed on the inner bottom of the rear chamber, and the supporting structure has a movable part that can be deflected and retracted, and the movable part is hinged to the side of the cover plate facing the connecting port.

[0008] Furthermore, the support structure includes a support frame, a deflection seat, a hydraulic cylinder and a connecting ring. The support frame is installed and fixed on the bottom inner wall of the rear chamber, and the lower end of the deflection seat is rotatably connected to the support frame. The bottom of the hydraulic cylinder is fixed to the upper end of the deflection seat, and the output end of the hydraulic cylinder is fixedly connected to the outer wall of the connecting ring. The connecting ring is hinged to the cover plate, and the output end of the hydraulic cylinder and the connecting ring constitute the movable part of the support structure.

[0009] Furthermore, the supporting structure also includes a corner bracket, fixing bolts and a boss, the side of the corner bracket facing the cover plate is fixedly connected to the cover plate by means of fixing bolts, the boss is fixedly connected to the side of the corner bracket facing the connecting ring, and the connecting ring is sleeved on the outside of the boss and rotatably connected thereto, so that the connecting ring and the cover plate are hinged.

[0010] Furthermore, the support structure is provided in two groups, and the two groups of the support structure are respectively connected to two opposite ends of the cover plate.

[0011] Furthermore, a holding groove is formed at the lower end of the cover plate, and an elastic rubber layer is bonded and fixed to the inner wall of the holding groove.

[0012] Furthermore, the shape and size of the cover plate are respectively matched with the shape and size of the rear compartment.

[0013] Furthermore, a sealing ring is sleeved on the outer wall of the cover plate, and there is an interference fit between the sealing ring and the rear chamber.

[0014] Furthermore, at least one group of torsion springs is sleeved on the rotating shaft, and two ends of the torsion springs are fixedly connected to the cover plate and the rotating shaft respectively.

[0015] The beneficial technical effects of the present application are as follows: by disposing the flip cover assembly in the rear chamber on the back of the instrument body, when the instrument body does not need to inject or add liquid nitrogen, the connecting port can be covered by the flip cover assembly, thereby preventing debris from entering the connecting port and clogging it to affect the subsequent addition of liquid nitrogen, thereby improving the safety and stability of the equipment; the flip-open cover can be supported by the supporting structure, so that when injecting or adding liquid nitrogen at the connecting port, the cover can be prevented from falling and interfering with the connecting pipe used for liquid nitrogen injection, thereby facilitating the operation of injecting and adding liquid nitrogen on the instrument body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the nuclear magnetic resonance experiment instrument in the embodiment of the present application when the flip cover assembly is closed;

[0017] Figure 2 yes Figure 1 Schematic diagram of the structure of the NMR experimental instrument when the inner cover assembly is opened;

[0018] Figure 3 It is a schematic diagram of the structure of the flip cover assembly according to an embodiment of the present application.

[0019] Figure numerals: 10, instrument body; 11, rear chamber; 12, connecting port; 20, flip cover assembly; 21, cover plate; 22, rotating shaft; 23, angle bracket; 24, fixing bolt; 25, boss; 26, support frame; 27, deflection seat; 28, hydraulic cylinder; 29, connecting ring. DETAILED DESCRIPTION

[0020] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0021] The present application embodiment discloses a nuclear magnetic resonance experimental instrument. Figure 1 and Figure 2 The nuclear magnetic resonance experiment instrument includes an instrument body 10 and a flip cover assembly 20. A rear chamber 11 is formed on the back of the instrument body 10, and a connecting port 12 is provided in the middle of the rear chamber 11 for adding and injecting liquid nitrogen. The flip cover assembly 20 is movably connected to the rear chamber 11, and when liquid nitrogen does not need to be added, the flip cover assembly 20 can cover the connecting port 12; when liquid nitrogen needs to be added, the flip cover assembly 20 can be flipped open.

[0022] See also Figure 3 The flip cover assembly 20 includes a cover plate 21, a rotating shaft 22, and at least one group of supporting structures. The rotating shaft 22 passes through the upper end of the cover plate 21 and is fixedly connected to the inner wall of the rear chamber 11. The cover plate 21 is rotatably mounted on the rotating shaft 22, so that the cover plate 21 can be deflected with the rotating shaft 22 as the rotation center axis. At least one group of supporting structures is installed on the inner bottom of the rear chamber 11. The supporting structure has a movable part that can be deflected and retracted. The movable part is hinged to the side of the cover plate 21 facing the connecting port 12, so that the movable part of the supporting structure can be used to support the cover plate 21 after it is deflected and opened. At this time, the connecting pipe of the external liquid nitrogen tank can be inserted into the connecting port 12 to inject liquid nitrogen into the interior. In the figure, the supporting structure is arranged in two groups, and the two groups of supporting structures are respectively connected to the opposite ends of the cover plate 21, so that the two groups of supporting structures can stably support the flipped open cover plate 21.

[0023] In this embodiment, the shape and size of the cover plate 21 are respectively matched with the shape and size of the rear chamber 11, so that the cover plate 21 can cover the rear chamber 11 when it is in a vertical state. A sealing ring is sleeved on the outer wall of the cover plate 21, and the sealing ring and the rear chamber 11 are interference fit, so that the cover plate 21 can seal the rear chamber 11 more tightly when covering it. A gripping groove is formed at the lower end of the cover plate 21, and an elastic rubber layer is bonded and fixed on the inner wall of the gripping groove, so that the user can pull the cover plate 21 in the gripping groove to flip the cover plate 21 outward to open it.

[0024] In this embodiment, the support structure may include an angle frame 23, a fixing bolt 24, a boss 25, a support frame 26, a deflection seat 27, a hydraulic cylinder 28 and a connecting ring 29. The support frame 26 is mounted and fixed on the bottom inner wall of the rear compartment 11, and the lower end of the deflection seat 27 is rotatably connected to the support frame 26. The bottom of the hydraulic cylinder 28 is fixed to the upper end of the deflection seat 27, and the output end of the hydraulic cylinder 28 is fixedly connected to the outer wall of the connecting ring 29. The output end of the hydraulic cylinder 28 and the connecting ring 29 constitute the movable part of the support structure. The hydraulic cylinder 28 can adjust its tilt angle by using the deflection seat 27, and its output end can adjust its extended length by telescoping along the cylinder body. The side of the angle frame 23 facing the cover plate 21 is fixedly connected to the cover plate 21 by using the fixing bolt 24, the boss 25 is fixedly connected to the side of the angle frame 23 facing the connecting ring 29, and the connecting ring 29 is sleeved on the outer side of the boss 25 and rotatably connected thereto, so that the connecting ring 29 is hinged to the cover plate 21. When the cover plate 21 is pulled and deflected outward, the boss 25 can exert force on the connecting ring 29 to make it move accordingly, and enable the output end of the hydraulic cylinder 28 to extend outward and generate deflection to assist in supporting the cover plate 21 .

[0025] In this embodiment, at least one group of torsion springs is sleeved on the rotating shaft 22, and the two ends of the torsion springs are fixedly connected to the cover plate 21 and the rotating shaft 22 respectively, so that after the user removes the connecting tube for inputting liquid nitrogen connected to the connecting port 12, the cover plate 21 can be deflected downward driven by the elastic deformation of the torsion springs, and the user applies force to buckle the cover plate 21 in the rear chamber 11 and flush with its outer wall to complete the shielding and protection of the connecting port 12.

[0026] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described one by one here. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A nuclear magnetic resonance experiment instrument, comprising an instrument body (10), a rear chamber (11) formed on the back of the instrument body (10), a communication port (12) provided in the middle of the rear chamber (11), characterized in that: It also includes a flip cover assembly (20), wherein the flip cover assembly (20) is movably connected to the rear chamber (11), so that the flip cover assembly (20) can cover the communication port (12). The flip cover assembly (20) comprises a cover plate (21), a rotating shaft (22), and at least one group of supporting structures, wherein the rotating shaft (22) passes through the upper end of the cover plate (21) and is fixedly connected to the inner wall of the rear chamber (11), the cover plate (21) is rotatably mounted on the rotating shaft (22), and at least one group of supporting structures is installed on the inner bottom of the rear chamber (11), and the supporting structure has a movable part that can be deflected and retracted, and the movable part is hinged to the side of the cover plate (21) facing the connecting port (12).

2. A nuclear magnetic resonance experimental instrument according to claim 1, characterized in that: The support structure comprises a support frame (26), a deflection seat (27), a hydraulic cylinder (28) and a connecting ring (29); the support frame (26) is fixedly mounted on the bottom inner wall of the rear chamber (11), and the lower end of the deflection seat (27) is rotatably connected to the support frame (26); the bottom of the hydraulic cylinder (28) is fixed to the upper end of the deflection seat (27), and the output end of the hydraulic cylinder (28) is fixedly connected to the outer wall of the connecting ring (29); the connecting ring (29) is hinged to the cover plate (21); the output end of the hydraulic cylinder (28) and the connecting ring (29) constitute the movable part of the support structure.

3. A nuclear magnetic resonance experimental instrument according to claim 2, characterized in that: The support structure further comprises an angle bracket (23), a fixing bolt (24) and a convex column (25); the side of the angle bracket (23) facing the cover plate (21) is fixedly connected to the cover plate (21) by means of the fixing bolt (24); the convex column (25) is fixedly connected to the side of the angle bracket (23) facing the connecting ring (29); and the connecting ring (29) is sleeved on the outside of the convex column (25) and rotatably connected thereto, so that the connecting ring (29) and the cover plate (21) are hingedly connected.

4. A nuclear magnetic resonance experimental instrument according to any one of claims 1 to 3, characterized in that: The support structure is arranged in two groups, and the two groups of the support structure are respectively connected to two opposite ends of the cover plate (21).

5. A nuclear magnetic resonance experimental instrument according to claim 1, characterized in that: A gripping groove is formed at the lower end of the cover plate (21), and an elastic rubber layer is bonded and fixed to the inner wall of the gripping groove.

6. A nuclear magnetic resonance experimental instrument according to claim 5, characterized in that: The shape and size of the cover plate (21) are respectively adapted to the shape and size of the rear chamber (11).

7. A nuclear magnetic resonance experimental instrument according to claim 6, characterized in that: A sealing ring is sleeved on the outer wall of the cover plate (21), and an interference fit is formed between the sealing ring and the rear chamber (11).

8. A nuclear magnetic resonance experimental instrument according to claim 1, characterized in that: At least one group of torsion springs is sleeved on the rotating shaft (22), and two ends of the torsion springs are respectively fixedly connected to the cover plate (21) and the rotating shaft (22).

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