Small automatic sample changing device suitable for low-temperature environment

Abstract

The utility model discloses a small automatic sample changing device suitable for a low-temperature environment, the small automatic sample changing device comprises a vacuum cover and an adapter flange, the lower surface of the vacuum cover is fixedly connected with a supporting guide rail, and the inner wall of the supporting guide rail is provided with a screw rod; a sample box is arranged on the outer surface of the lead screw and comprises a sample tube, and a first servo motor is fixedly connected to one side of the inner wall of the vacuum cover. According to the small automatic sample changing device suitable for the low-temperature environment, through the arrangement of a first servo motor, a lead screw, a second servo motor, a supporting shaft system and a sample rotating disc, due to the fact that a sampling mechanism and a sample transferring mechanism can conduct automatic sampling and sample injection in the experiment process, automatic sample changing in the experiment process is achieved, and the experiment efficiency is improved. Therefore, the operations of closing ray beams, disassembling equipment, calibrating the positions of the samples and the like are not needed in sample replacement in the experiment process, personal errors in repeated experiments are reduced, the experiment efficiency is improved, and the waste of beam time is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of neutron scattering, and particularly relates to a small automatic sample changer applicable to low-temperature environments. Background Art

[0002] Neutron scattering and synchrotron radiation are two complementary means for characterizing the internal microstructure of sample materials. At low temperatures, it is beneficial to improve the accuracy of neutron scattering experiments or cause phase transitions in some sample materials or exhibit excellent properties. Therefore, low-temperature conditions are crucial for many disciplinary studies.

[0003] Since the sample environment needs to be reloaded every time the sample is changed, this process often takes a lot of time, and inevitable human errors will occur during the process of re-sampling. Automatic sample changers can be roughly divided into two types: the sample-changing mechanism is in direct or indirect contact with the sample environment; the former is prone to jamming, so high requirements are imposed on the design and processing accuracy of the equipment, while the latter is often huge in volume and mass. This device aims to reduce the volume of the sample-changing mechanism and is not prone to jamming when in direct contact with the low-temperature environment. Therefore, it is necessary to design a small automatic sample changer applicable to low-temperature environments. Summary of the Invention

[0004] The main object of the present invention is to provide a small automatic sample changer applicable to low-temperature environments, which can effectively solve the problems in the background art.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A small automatic sample changer applicable to low-temperature environments includes a vacuum chamber and an adapter flange. The lower surface of the vacuum chamber is fixedly connected with a support guide rail, and a lead screw is arranged on the inner wall of the support guide rail; a sample box is arranged on the outer surface of the lead screw. The sample box includes a sample tube. One side of the inner wall of the vacuum chamber is fixedly connected with a first servo motor, and the other side of the inner wall of the vacuum chamber is fixedly connected with a second servo motor.

[0007] To achieve the purpose of being able to place samples, as a small automatic sample changer applicable to low-temperature environments of the present invention, the output end of the first servo motor is fixedly connected with a sample turntable, and the output end of the second servo motor is fixedly connected with a support shaft system.

[0008] To achieve the purpose of being able to adjust, as a small automatic sample changer applicable to low-temperature environments of the present invention, a nut is threadedly connected to one side of the outer surface of the lead screw.

[0009] In order to achieve the purpose of convenient rotation, as a small automatic sample changer applicable to low-temperature environments in the present invention, the output end of the first servo motor is fixedly connected to a lead screw, and a first coupling is arranged on one side of the outer surface of the lead screw.

[0010] In order to achieve the purpose of convenient rotation, as a small automatic sample changer applicable to low-temperature environments in the present invention, a second coupling is arranged on one side of the outer surface of the sample turntable.

[0011] In order to achieve the purpose of convenient sealing, as a small automatic sample changer applicable to low-temperature environments in the present invention, a sample cap is arranged on one side of the outer surface of the sample tube, a sealing ring is arranged on one side of the inner wall of the sample cap, and a connecting piece is arranged on the upper surface of the sample cap.

[0012] In order to achieve the purpose of convenient observation, as a small automatic sample changer applicable to low-temperature environments in the present invention, a grating scale is fixedly connected to the upper surface of the support guide rail, and a glass screen is fixedly connected to one side of the outer surface of the vacuum chamber.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In the present invention, through the settings of the first servo motor, lead screw, second servo motor, support shaft system and sample turntable, since the sampling mechanism and sample transfer mechanism can automatically sample and load samples during the experiment, realizing automatic sample change during the experiment, it makes the operations such as closing the beam current, disassembling the equipment, and calibrating the sample position unnecessary during sample change in the experiment, reducing the human error in repetitive experiments, improving the experimental efficiency, and avoiding the waste of beam time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the small low-temperature automatic sample changer of the present invention;

[0016] Figure 2 It is a schematic transmission structure diagram of the small low-temperature automatic sample changer of the present invention;

[0017] Figure 3 It is a schematic structural diagram of the sample box dedicated to this set of devices of the present invention;

[0018] Figure 4 It is a schematic structural diagram of the turntable of the present invention and the sample box installed on it;

[0019] Figure 5 It is a schematic structural diagram of the lead screw nut of the present invention;

[0020] Figure 6 It is a schematic structural diagram of the grating scale of the present invention.

[0021] In the figure: 1. Vacuum chamber; 2. Adapter flange; 3. Support guide rail; 4. Lead screw; 5. Sample tube; 6. First servo motor; 7. Second servo motor; 8. Sample turntable; 9. Support shaft system; 10. Nut; 11. First coupling; 12. Second coupling; 13. Sample cap; 14. Sealing O-ring; 15. Connecting piece; 16. Grating scale; 17. Glass screen. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] As Figure 1-6 shown, a small automatic sample changer applicable to low-temperature environments includes a vacuum chamber 1 and an adapter flange 2. The lower surface of the vacuum chamber 1 is fixedly connected with a support guide rail 3, and a lead screw 4 is arranged on the inner wall of the support guide rail 3;

[0024] In this embodiment, a sample box is arranged on the outer surface of the lead screw 4. The sample box includes a sample tube 5. One side of the inner wall of the vacuum chamber 1 is fixedly connected with a first servo motor 6, and the other side of the inner wall of the vacuum chamber 1 is fixedly connected with a second servo motor 7.

[0025] During specific use, the first servo motor 6 can drive the lead screw 4 to rotate, the second servo motor 7 can drive the support shaft system 9 to rotate, and at the same time, the support guide rail 3 can support the lead screw 4.

[0026] In this embodiment, the output end of the first servo motor 6 is fixedly connected with a sample turntable 8, and the output end of the second servo motor 7 is fixedly connected with a support shaft system 9.

[0027] During specific use, when the first servo motor 6 rotates, it can drive the sample turntable 8 to rotate together, and the second servo motor 7 can drive the support shaft system 9 to rotate.

[0028] In this embodiment, a nut 10 is threadedly connected to one side of the outer surface of the lead screw 4.

[0029] During specific use, when the lead screw 4 rotates, the nut 10 can slide along the lead screw 4.

[0030] In this embodiment, the output end of the first servo motor 6 is fixedly connected with the lead screw 4, and a first coupling 11 is arranged on one side of the outer surface of the lead screw 4.

[0031] During specific use, with the setting of the first servo motor 6 and the first coupling 11, the lead screw 4 can be driven to rotate relatively conveniently.

[0032] In this embodiment, a second coupling 12 is provided on one side of the outer surface of the sample turntable 8.

[0033] During specific use, with the setting of the second coupling 12, the sample turntable 8 can be rotated relatively conveniently.

[0034] In this embodiment, a sample cap 13 is provided on one side of the outer surface of the sample tube 5, a sealing ring 14 is provided on one side of the inner wall of the sample cap 13, and a connecting member 15 is provided on the upper surface of the sample cap 13.

[0035] During specific use, the sample cap 13 can seal the sample tube 5, and by pressing the sample cap 13, the sealing ring 14 can be used to completely seal the sample tube 5.

[0036] In this embodiment, a grating scale 16 is fixedly connected to the upper surface of the support rail 3, and a glass screen 17 is fixedly connected to one side of the outer surface of the vacuum chamber 1.

[0037] During specific use, the grating scale 16 is used to real-time feedback the position of the sample, and the glass screen 17 can observe the internal sample replacement situation, and can be processed in time in case of an accident.

[0038] Working principle: During use, the first sample is located at the detection position for preloading the relevant sample environment, such as pre-cooling. The neutron beam irradiates the sample. After the detection of the first sample is completed, the first servo motor 6 transmits the power to the lead screw 4 through the first coupling 11. At this time, the nut 10 starts to move through the trapezoidal thread engagement and drives the first sample to move vertically upward at the "1a" position until the height of the sample tube 5 is a certain distance higher than the support platform at the 1b position. At this time, the first servo motor 6 stops providing power. The second servo motor 7 transmits the power to the support shaft system 9 through the second coupling 12, driving the sample turntable 8 to rotate until the sample tube 5 (or the sample cap 13) reaches the position tangent to the turntable wall. The second servo motor 7 stops rotating. At this time, the first sample is accurately located at the "1b" position. The first servo motor 6 continues to transmit power to make the nut 10 move vertically downward. Subsequently, at a certain height, the convex groove of the first sample tube 8 is in a small clearance fit with the concave groove of the support platform to complete the support, ensuring that while the support is smooth, the first sample does not tilt significantly. After the first sample is installed back at the "1b" position of the sample turntable 8, the nut 10 continues to move downward to a position lower than the sample tube 5 by a certain distance, and the first servo motor 6 stops providing power. Subsequently, the second servo motor 7 starts to provide power until the "2b" is aligned with the sample cavity and stops rotating. The first servo motor 6 provides power to make the nut 10 move vertically upward. The concave groove of the nut 10 cooperates with the convex groove of the second sample tube 5 and jacks it up, and the two move vertically together until the height of the second sample tube 5 is a certain height higher than the sample turntable 8. The first servo motor 6 stops operating. The second servo motor 7 rotates the sample turntable 8 to the "2a" to align with the sample cavity, and the nut 10 conveys the sample tube 5 to the detection position. After the detection of a batch of samples is completed, the glass screen 17 is opened, and all the actions are continued to repeat to start the detection of the next batch of samples.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A small automatic sample changer applicable to low-temperature environments, comprising a vacuum chamber (1) and an adapter flange (2), characterized in that: The lower surface of the vacuum chamber (1) is fixedly connected with a support guide rail (3), and a lead screw (4) is arranged on the inner wall of the support guide rail (3); A sample box is arranged on the outer surface of the lead screw (4). The sample box includes a sample tube (5). One side of the inner wall of the vacuum chamber (1) is fixedly connected with a first servo motor (6), and the other side of the inner wall of the vacuum chamber (1) is fixedly connected with a second servo motor (7).

2. The small automatic sample-changing device suitable for low-temperature environment according to claim 1, characterized in that: The output end of the first servo motor (6) is fixedly connected with a sample turntable (8), and the output end of the second servo motor (7) is fixedly connected with a support shaft system (9).

3. The small automatic sample changer applicable to low-temperature environment according to claim 1, characterized in that: One side of the outer surface of the lead screw (4) is threadedly connected with a nut (10).

4. The small automatic sample changer applicable to low-temperature environments according to claim 1, wherein: The output end of the first servo motor (6) is fixedly connected with the lead screw (4), and a first coupling (11) is arranged on one side of the outer surface of the lead screw (4).

5. The small automatic sample changer applicable to low-temperature environments according to claim 2, wherein: One side of the outer surface of the sample turntable (8) is provided with a second coupling (12).

6. The small automatic sample changer applicable to low-temperature environments according to claim 1, wherein: One side of the outer surface of the sample tube (5) is provided with a sample cap (13). One side of the inner wall of the sample cap (13) is provided with a sealing O-ring (14), and a connecting piece (15) is arranged on the upper surface of the sample cap (13).

7. The small automatic sample changer applicable to low-temperature environments according to claim 1, characterized in that: The upper surface of the support guide rail (3) is fixedly connected with a grating scale (16), and one side of the outer surface of the vacuum chamber (1) is fixedly connected with a glass screen (17).

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