Small sample clamp of direct-reading spectrometer

Abstract

The embodiment of the utility model relates to a small sample clamp for a direct-reading spectrometer, which is characterized by comprising a bracket, a clamping device and a clamping device, the number of the clamping pieces is at least two, the clamping pieces are matched with the shape of the sample and used for clamping the sample, and the clamping pieces abut against at least part of the periphery of the sample in the state that the clamping pieces clamp the sample; the first driving mechanism is used for driving the clamping piece to move along the direction of the track so as to clamp the sample; and the second driving mechanism is used for driving the clamping piece to rotate and can keep the state of the clamping piece after rotation. The clamp has the advantages that the clamp can effectively cover the excitation hole while clamping a sample with a smaller size or an irregular shape, argon overflow is reduced, the analysis effect of the direct-reading spectrometer on the small-size sample is improved, and the clamp is simple in overall structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the detection field, in particular to a small sample clamp of a direct-reading spectrometer. Background Art

[0002] As a device for elemental analysis of metal materials, direct reading spectrometer is widely used in furnace pre-analysis and laboratory testing due to its convenience, speed and sensitivity. During use, the metal sample needs to be placed on the excitation table and cover the excitation hole on the instrument, and the diameter of the excitation hole is usually 10-15mm. However, metal samples vary in size and shape. If the excitation hole cannot be completely covered, argon leakage will occur, which will affect the analysis results. Therefore, many samples that cannot completely cover the excitation hole due to small size or irregular shape will be limited in measurement on the direct reading spectrometer. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a small sample fixture for a direct reading spectrometer which can assist small-size samples to effectively cover the excitation holes in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a small sample fixture of a direct reading spectrometer, characterized in that it includes:

[0005] a bracket having a track;

[0006] There are at least two clamping members, which match the shape of the sample and are used to clamp the sample. When the clamping members clamp the sample, the clamping members abut against at least part of the periphery of the sample;

[0007] A first driving mechanism, used for driving the clamping member to move along the track direction, thereby clamping the sample;

[0008] The second driving mechanism is used to drive the clamping member to rotate and can maintain the clamping member in a rotated state.

[0009] In order to enable the first driving mechanism to drive the clamping member to move along the track direction but not directly drive the clamping member to protect the clamping member, the first driving mechanism includes a moving block and a driving member, the moving block is connected to the clamping member, and the driving member is driven and connected to the moving block to drive the clamping member to move.

[0010] The driving member can be directly a motor, but in order to save cost and space, preferably, the driving member includes a screw, a clamping joint and a baffle, the clamping joint is arranged at the end of the screw, the baffle has a through hole, and the clamping joint passes through the through hole to be connected with the moving block.

[0011] In order to facilitate pushing the screw rod, the bracket has a screw hole, and the screw rod passes through the screw hole and can move back and forth in the screw hole.

[0012] The second driving mechanism can be directly a motor, but in order to save cost and space, preferably, the second driving mechanism includes a bolt and a nut, the nut is movably arranged on the track, the bolt passes through the track, one end of the bolt is threadedly connected to the nut, and the other end is connected to the clamping member.

[0013] The bracket has a variety of structures. From the perspective of structural simplicity, preferably, the bracket includes a base plate and support plates arranged on both sides of the base plate, the track is arranged on the base plate, and the screw holes are arranged on the support plates.

[0014] In order to be able to directly replace the corresponding clamping member according to the shape and size of the sample during use, the clamping member is detachably connected to the first driving mechanism and the second driving mechanism respectively.

[0015] In order to further improve the stability of the clamping member when clamping the sample, the rails have two rails and are arranged in parallel. The clamping member, the first drive mechanism and the second drive mechanism each have four, and each clamping member is driven by its own first drive mechanism and second drive mechanism.

[0016] Compared with the prior art, the advantages of the utility model are that the shape of the clamping piece in the small sample clamp of the direct-reading spectrometer matches that of the sample. When the clamping piece clamps the sample, the clamp abuts against at least part of the periphery of the sample. In this way, for samples with small size or irregular shape, the clamp can effectively cover the excitation hole while clamping the sample, reduce argon gas overflow, and improve the effect of the direct-reading spectrometer on the analysis of small-size samples. The overall structure is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a sample fixture for a direct-reading spectrometer in Embodiment 1 of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the first driving mechanism in the first embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the second driving mechanism connected to the clamping member in the first embodiment of the utility model;

[0020] Figure 4 This is a bottom view of the sample clamp of the direct-reading spectrometer in the first embodiment of the utility model after clamping the sample;

[0021] Figure 5 This is a bottom view of the sample clamp of the direct-reading spectrometer in the second embodiment of the utility model after clamping the sample;

[0022] Figure 6This is a bottom view of the direct-reading spectrometer sample fixture in the second embodiment of the utility model after clamping the triangular prism sample. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] Embodiment 1

[0025] like Figure 1-4 As shown, a small sample fixture of a direct-reading spectrometer of this embodiment includes a bracket 1, a clamping member 2, a first driving mechanism 3 and a second driving mechanism 4, and the fixture is made of conductive metal.

[0026] The bracket 1 includes a base plate 11 and support plates 12 disposed on both sides of the base plate 11, and the support plates 12 are used to support the base plate 11. The base plate 11 has two rails 1a disposed in parallel, and four screw holes 1b, each of which is a group of two screw holes 1b disposed on each support plate 12.

[0027] The clamping member 2 matches the shape of the sample 5 and is used to clamp the sample 5. The clamping member 2 is detachably connected to the first driving mechanism 3 and the second driving mechanism 4. There are four clamping members 2, four first driving mechanisms 3 and four second driving mechanisms 4, and each clamping member 2 is driven by its own first driving mechanism 3 and second driving mechanism 4.

[0028] like Figure 2 As shown, the first driving mechanism 3 includes a moving block 31 and a driving member, and the driving member includes a screw rod 32, a clamping joint 33 and a baffle 34. Among them, the moving block 31 is arranged above the clamping member 2 and connected to the clamping member 2, the screw rod 32 passes through the screw hole 1b and can move forward and backward in the screw hole 1b, the clamping joint 33 is arranged at the end of the screw rod 32, and the baffle 34 has a through hole 341, and the clamping joint 33 passes through the through hole 341 and is connected to the moving block 31. In this way, the screw rod 32 rotates in the screw hole 1b and moves forward and backward, but due to the existence of the baffle 34, the clamping joint 33 can only drive the moving block 31 to move and does not drive the moving block 31 to rotate, thereby driving the clamping member 2 to move.

[0029] like Figure 3 As shown, the second driving mechanism 4 includes a bolt 41 and a nut 42. The nut 42 is movably arranged on the track 1a. The bolt 41 passes through the track 1a. One end of the bolt 41 is threadedly connected with the nut 42, and the other end passes through the moving block 31 and enters the clamping member 2 to be connected with the clamping member 2. Each track 1a is provided with two second driving mechanisms 4. As long as the nut 42 is loosened, the clamping member 2 can be rotated at any angle. When the nut 42 is tightened, the corresponding clamping member 2 will remain fixed at the angle, thereby realizing that the clamping member 2 can change any angle.

[0030] In this way, the first driving mechanism 3 can drive the clamping member 2 to move along the track 1a, thereby clamping the sample 5. The second driving mechanism 4 can drive the clamping member 2 to rotate, and can maintain the state of the clamping member 2 after rotation.

[0031] In this embodiment, the sample is a rectangular parallelepiped, and the clamping member 2 is also a rectangular parallelepiped. The working principle of this embodiment is: place the sample 5 with the test surface facing downward on a horizontal table, then place the direct reading spectrometer sample fixture above the sample 5, rotate the screw 32, and adjust the angle of the clamping member 2 to fix the sample 5. Figure 4 As shown, when the clamping member 2 clamps the sample 5, the clamping member 2 abuts against at least part of the periphery of the sample 5. Then the clamped sample 5 is placed on the excitation table for excitation, and the chemical composition of the sample can be obtained. If the surface of the sample 5 to be tested is larger than the excitation hole, the sample 5 can directly cover the excitation hole, otherwise, the clamping member 2 and the sample 5 will cover the excitation hole together, thereby ensuring that the excitation hole is effectively covered.

[0032] Embodiment 2

[0033] The difference between this embodiment and the first embodiment is that the sample 5 is a cylinder and the clamping member 2 is also a cylinder. When the clamping member 2 clamps the sample 5, the clamping member 2 abuts against at least part of the periphery of the sample 5. Figure 5 shown.

[0034] The clamping member 2 in the first embodiment can be directly disassembled, and then the clamping member 2 in this embodiment can be installed. Of course, the clamping member 2 can also be integrally arranged with other adjacent connected components.

[0035] Of course, the samples can have other shapes, e.g. Figure 6 The triangular prism or other irregular shapes shown in the figure can be obtained by simply replacing the clamping member 2 with a corresponding shape that can effectively clamp, and the details will not be repeated.

[0036] Furthermore, the shapes of the four clamping members 2 do not need to be uniform, and they can be adjusted according to the different shapes of the samples to ensure that the samples are effectively clamped while helping the samples to completely cover the excitation holes as much as possible.

Claims

1. A small sample fixture for a direct reading spectrometer, characterized in that: include: A support (1) having a track (1a); The clamping members (2) have at least two parts, match the shape of the sample (5), and are used to clamp the sample (5). When the clamping members (2) clamp the sample (5), the clamping members (2) abut against at least part of the periphery of the sample (5); A first driving mechanism (3) for driving the clamping member (2) to move along the track (1a) to clamp the sample (5); The second driving mechanism (4) is used to drive the clamping member (2) to rotate and can maintain the state of the clamping member (2) after rotation.

2. The small sample fixture for direct reading spectrometer according to claim 1, characterized in that: The first driving mechanism (3) comprises a moving block (31) and a driving member, wherein the moving block (31) is connected to the clamping member (2), and the driving member is drivingly connected to the moving block (31) to drive the clamping member (2) to move.

3. The small sample fixture for direct reading spectrometer according to claim 2, characterized in that: The driving member comprises a screw rod (32), a clamping joint (33) and a baffle (34); the clamping joint (33) is arranged at the end of the screw rod (32); the baffle (34) has a through hole (341); the clamping joint (33) passes through the through hole (341) and is connected to the moving block (31).

4. The small sample fixture for direct reading spectrometer according to claim 3, characterized in that: The bracket (1) has a screw hole (1b), and the screw rod (32) passes through the screw hole (1b) and can move forward and backward in the screw hole (1b).

5. The small sample fixture for direct reading spectrometer according to claim 4, characterized in that: The second driving mechanism (4) comprises a bolt (41) and a nut (42); the nut (42) is movably arranged on the track (1a); the bolt (41) passes through the track (1a); one end of the bolt (41) is threadedly connected to the nut (42) and the other end is connected to the clamping member (2).

6. The small sample fixture for direct reading spectrometer according to claim 4, characterized in that: The bracket (1) comprises a base plate (11) and support plates (12) arranged on both sides of the base plate (11); the track (1a) is arranged on the base plate (11); and the screw hole (1b) is arranged on the support plate (12).

7. The small sample fixture for direct reading spectrometer according to claim 1, characterized in that: The clamping member (2) is detachably connected to the first driving mechanism (3) and the second driving mechanism (4) respectively.

8. The small sample fixture for direct reading spectrometer according to claim 1, characterized in that: The rails (1a) have two tracks arranged in parallel, the clamping members (2), the first drive mechanisms (3) and the second drive mechanisms (4) each have four tracks, and each clamping member (2) is driven by its own first drive mechanism (3) and second drive mechanism (4).

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