Filamentous sample fixing clamp for spark spectrometer detection

Abstract

The utility model discloses a filamentous sample fixing clamp for detection of a spark spectrometer, which comprises a frame sleeve and a sample frame, and the height of the sample frame is greater than that of the frame sleeve; the sample rack is composed of a handle and an outer cylinder, and the outer surface of the outer cylinder is provided with a rectangular through hole and a sample table which is formed by the rectangular through hole and used for placing a filamentous sample; the frame sleeve is connected with the outer cylinder of the sample frame and is pressed downwards to fix a filamentous sample placed on the sample table, the fixture can effectively fix the filamentous sample, such as an iron wire, with the diameter being less than or equal to 3.5 mm and even less than or equal to 1 mm, the position of the sample is ensured to be stable in the excitation process, and the detection precision is improved; the sealing cover is arranged, and the cavity is designed to be small in size, so that a closed argon gas environment can be quickly formed during use, inert gas shielding gas leakage is avoided, a pure atmosphere required by excitation is met, and the excitation quality is improved.

Description

Technical Field

[0001] The utility model relates to the field of filamentous sample detection, and particularly relates to a fixing jig for filamentous samples used in spark spectrometers. Background Art

[0002] Existing spark direct-reading spectrometers are mainly used to analyze the chemical composition of metal materials. By placing the sample to be tested on the excitation hole and using an electric spark to excite the surface of the sample, the sample changes from a solid state to a gaseous state and is ionized. Different elements have different absorptions of the spectrum. By analyzing the spectrum of the electric spark, qualitative and quantitative analysis of the elements contained in the measured substance can be carried out. However, for filamentous samples with a small diameter, such as iron wires and copper wires, since their diameters are smaller than the diameter of the excitation hole, they cannot completely cover the excitation hole, resulting in serious leakage of the inert gas protective gas and the inability to form an effective gas atmosphere. At the same time, filamentous samples are not easy to fix, and the excitation position is difficult to locate, ultimately resulting in poor excitation effects and inaccurate analysis data.

[0003] In the prior art, some spark direct-reading spectrometers are equipped with rod-shaped sample jigs for fixing rod-shaped samples with a small diameter. However, these jigs are usually only applicable to rod-shaped samples with a larger diameter, and for filamentous samples with a diameter of ≤3.5 mm, these jigs cannot effectively fix them. On the other hand, some jigs cannot form a closed argon gas environment during use, which affects the excitation effect.

[0004] The prior art CN212207075U discloses a filamentous sample jig device for direct-reading spectrometer analysis, including a compression cap, a connecting rod, a jig outer sleeve, a jig middle sleeve, and a jig inner sleeve. This device is applicable to the direct-reading spectrometer analysis of regular or irregular filamentous samples with a cross-sectional length and width of ≤5 mm, and can be applicable to excitation holes of sample stages with different diameters. It has a sample positioning function and a fixing function, and has a simple structure and is easy to operate. However, when this device is applicable to filamentous samples of different sizes and shapes, the transverse dimensions and quantities of the grooves need to be adjusted to better fix and position different samples.

[0005] Existing filamentous sample jigs cannot combine multiple sections of filamentous samples into a larger flat surface, and only excite the sides of one or a few sections of samples, thus not being able to better meet the excitation requirements. Further, existing filamentous sample jigs can only fix filamentous samples with a diameter of more than 1 mm, while samples with a diameter of ≤1 mm do not have a very good fixing effect.

[0006] Therefore, for filamentous samples with a relatively small diameter, the prior art lacks effective auxiliary detection tools and cannot broaden the types of samples that can be analyzed by spark spectroscopy. There is an urgent need to design a new type of fixing jig to solve the above problems and improve the detection effect of filamentous samples. Summary of the Utility Model

[0007] To solve the above technical problems, the present utility model provides a filamentous sample fixing fixture for spark spectrometer detection. Using this fixture can effectively fix filamentous samples with a diameter ≤ 3.5 mm, or even ≤ 1 mm, such as iron wire, etc., ensuring the stable position of the sample during the excitation process and improving the detection accuracy; it is equipped with a sealing cover and designed with a relatively small cavity volume, which can quickly form a sealed argon environment during use, avoid the leakage of inert gas protective gas, meet the pure atmosphere required for excitation, and improve the excitation quality.

[0008] The technical solution of the present utility model is: a filamentous sample fixing fixture for spark spectrometer detection, including a frame sleeve and a sample holder, and the height of the sample holder is greater than the height of the frame sleeve;

[0009] The sample holder consists of a handle and an outer cylinder. The outer surface of the outer cylinder is provided with a rectangular through-hole and a sample table for placing filamentous samples formed by the rectangular through-hole;

[0010] The frame sleeve is connected to the outer cylinder of the sample holder and is pressed down to fix the filamentous sample placed on the sample table.

[0011] Further, the frame sleeve is a hollow structure and is provided with a first cavity and a second cavity. The inner diameter of the first cavity is smaller than the inner diameter of the second cavity, and the frame sleeve is threadedly connected to the outer cylinder through the first cavity.

[0012] Further, the inner diameter of the outer cylinder is smaller than the inner diameter of the second cavity.

[0013] Further, a hollow arc top is provided in the rectangular through-hole, and the hollow arc top is located directly above the filamentous sample.

[0014] Further, it also includes a sealing cover that wraps the frame sleeve. The inside of the sealing cover has a shape structure that cooperates with the frame sleeve and the sample holder, and the sealing cover is inserted along the height direction of the sample holder to cover the frame sleeve and the sample holder.

[0015] Further, the sealing cover has a positioning cavity that cooperates with the sample holder, a limiting cavity that cooperates with the frame sleeve, and a reserved cavity. The limiting cavity is also provided with a limiting groove for fixing a spring, and the spring is located above the frame sleeve.

[0016] Further, the inner diameter of the limiting cavity is greater than the inner diameter of the positioning cavity, and the inner diameter of the reserved cavity is greater than the inner diameter of the limiting cavity.

[0017] Further, it also includes a spark table for exciting the filamentous sample. The spark table is provided with an excitation hole, and an excitation groove that cooperates with the sample holder is provided outside the excitation hole.

[0018] The beneficial technical effects of the present utility model are:

[0019] 1. Compared with the old - type fixture, the relative standard deviation of the detection data of the same sample by the new fixture has been reduced by several to dozens of times, significantly improving the repeatability of the sample detection data. At the same time, multiple segments of filamentous samples can be closely arranged side - by - side to form a larger flat surface and placed on the sample stage, increasing the excitation area of the sample and improving the excitation effect;

[0020] It can effectively fix filamentous samples with a diameter ≤ 3.5 mm, or even ≤ 1 mm, such as iron wires, etc., ensuring the stable position of the sample during the excitation process and improving the detection accuracy.

[0021] 2. Equipped with a sealing cover and designed with a relatively small cavity volume, it can quickly form a sealed argon environment during use, avoiding the leakage of inert gas protective gas, meeting the pure atmosphere required for excitation, and improving the excitation quality.

[0022] 3. The frame sleeve and the sample holder are rotatably connected, and it can adapt to filamentous samples of different sizes without adjusting the fixed fixture, reducing the use cost and workload.

[0023] 4. The fixed fixture is small in volume and has the ability of self - positioning. It does not require an additional positioning device, and its structure is simple, improving the detection efficiency.

[0024] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly and be able to implement it according to the content of the description, the following takes the preferred embodiments of the present utility model and combines with the attached drawings to elaborate in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the overall structural schematic diagram of the present utility model;

[0026] Figure 2 is the cross - sectional view of the sealing cover of the present utility model;

[0027] Figure 3 is the structural schematic diagram of the fixed fixture of the present utility model;

[0028] Figure 4 is the structural schematic diagram of the frame sleeve of the present utility model;

[0029] Figure 5 is the structural schematic diagram of the filamentous sample placed on the sample holder of the present utility model;

[0030] Figure 6 is another perspective of the structural schematic diagram of the sample holder of the present utility model;

[0031] Figure 7 is the structural schematic diagram of the surface of the spark table of the present utility model.

[0032] The reference numerals are as follows:

[0033] 100, spark table; 110, excitation hole; 120, excitation groove; 200, sealing cover; 210, positioning cavity; 220, limiting cavity; 230, limiting groove; 240, reserved cavity; 300, fixing fixture; 310, sample holder; 311, handle; 312, outer cylinder; 313, rectangular through-hole; 3131, sample stage; 314, hollow arc top; 315, opening; 320, holder sleeve; 321, first cavity; 322, second cavity; 400, filamentous sample. Detailed implementation manners

[0034] In order to better understand the technical means of the present utility model and be able to implement it in accordance with the content of the specification, the following further describes the detailed implementation manners of the present utility model in combination with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of this application described herein.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship recorded in the embodiments and shown in the drawings, or the orientation or positional relationship in which the product of this utility model is usually placed when in use. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0037] As Figures 1-7 shown, the present utility model specifically relates to a fixing fixture 300 for a filamentous sample 400 used in a spark spectrometer detection, which includes a holder sleeve 320 and a sample holder 310, and the height of the sample holder 310 is greater than the height of the holder sleeve 320;

[0038] The sample holder 310 is composed of a handle 311 and an outer cylinder 312. The outer surface of the outer cylinder 312 is provided with a rectangular through-hole 313 and a sample stage 3131 for placing the filamentous sample 400 formed by the rectangular through-hole 313;

[0039] The sleeve 320 is connected to the outer cylinder 312 of the sample holder 310 and pressed down to fix the filamentous sample 400 placed on the sample stage 3131.

[0040] It should be noted that the sleeve 320 is sleeved on the surface of the sample holder 310 and can move up and down relative to the sample holder 310 to fix the filamentous sample 400 placed on the sample holder 310.

[0041] A rectangular through-hole 313 is provided on the outer surface of the outer cylinder 312, and an opening 315 is provided at the bottom of the outer cylinder 312. The opening 315 is communicated with the rectangular through-hole 313. A sample stage 3131 for placing the filamentous sample 400 is formed through the rectangular through-hole 313. The filamentous sample 400 is laid flat on the filamentous sample 400 to form an excitation surface, and the spark stage 100 performs excitation processing on the excitation surface through the opening 315.

[0042] The assembly process is as follows:

[0043] After inserting the sample holder 310 into the sleeve 320 by holding the handle 311, the filamentous sample 400 passes through the space of the rectangular through-hole 313. Multiple filamentous samples 400 with the same length are placed on the sample stage 3131 and neatly and tightly arranged in a layer. Then, the sleeve 320 is controlled to move relative to the sample holder 310 until the sample is clamped by the lower surface of the sleeve 320. At this time, the lower surface of the sleeve 320 and the sample stage 3131 form a shearing structure to firmly clamp both ends of the sample.

[0044] The sleeve 320 is of a hollow structure and is provided with a first cavity 321 and a second cavity 322. The inner diameter of the first cavity 321 is smaller than the inner diameter of the second cavity 322. The sleeve 320 is threadedly connected to the outer cylinder 312 through the first cavity 321.

[0045] Because the sleeve 320 is threadedly connected to the sample holder 310, the clamping force of the sleeve 320 on the sample is adjustable and the clamping is stable. The stability of clamping can be grasped according to the feedback of the tightening force.

[0046] In addition, the upper part of the first cavity 321 is provided with internal threads (not marked in the figure), and the lower part has no threads, which reduces the processing cost on the premise of ensuring rotational fixation.

[0047] The upper part of the surface of the outer cylinder 312 is provided with external threads (not marked in the figure) for use in conjunction with the internal threads, and the external threads are located above the rectangular through-hole 313. Due to the existence of the rectangular through-hole 313, the lower part of the surface structure of the outer cylinder 312 is complex, and removing the threads can reduce the processing difficulty.

[0048] The inner diameter of the second cavity 322 is larger than the inner diameter of the first cavity 321, which facilitates the insertion of the outer cylinder 312 into the sleeve 320.

[0049] The inner diameter of the outer cylinder 312 is smaller than that of the second cavity 322, facilitating the insertion of the outer cylinder 312 into the sleeve 320.

[0050] A hollow arc top 314 is provided in the rectangular through hole 313, and the hollow arc top 314 is located directly above the filamentous sample 400.

[0051] The hollow arc top 314 is also located directly above the opening 315. The hollow arc top 314 is the area where the filamentous sample 400 is excited. The arc-shaped top is far from the sample, ensuring that only the sample can be excited by the electric spark, avoiding inaccurate sample detection. At the same time, it can also reduce the cavity volume, and the arc top is more conducive to fluid flow, ensuring that the excitation environment can be quickly and residue-free replaced with a pure argon environment, ensuring good excitation effect.

[0052] It further includes a sealing cover 200 that wraps the sleeve 320. The inside of the sealing cover 200 has a shape structure for cooperating with the sleeve 320 and the sample holder 310. The sealing cover 200 is inserted along the height direction of the sample holder 310 to cover the sleeve 320 and the sample holder 310.

[0053] The sealing cover 200 is provided with a plurality of cavities and includes a positioning cavity 210 for cooperating with the sample holder 310, a limiting cavity 220 for cooperating with the sleeve 320, and a reserved cavity 240. The limiting cavity 220 is also provided with a limiting groove 230 for fixing a spring (not marked in the figure), and the spring is located above the sleeve 320.

[0054] The inner diameter of the limiting cavity 220 is larger than that of the positioning cavity 210, and the inner diameter of the reserved cavity 240 is larger than that of the limiting cavity 220.

[0055] It further includes a spark table 100 for exciting the filamentous sample 400. The spark table 100 is provided with an excitation hole 110, and an excitation groove 120 for cooperating with the sample holder 310 is provided outside the excitation hole 110.

[0056] Among them, the sealing cover 200 is for cooperating with the fixing fixture 300. Under normal circumstances, the sealing cover 200 is assembled on an external instrument. After the fixing fixture 300 fixes the filamentous sample 400 and places it on the spark table 100, the instrument covers the entire fixing fixture 300 through the sealing cover 200.

[0057] When the fixed fixture 300 is placed, it is necessary to ensure that the excitation surface of the filamentous sample 400 is at the exact center position of the excitation hole 110. By using the excitation groove 120 that most spark tables 100 are equipped with and matching it with the outer cylinder 312 of the sample holder 310, precise positioning can be achieved without the need to add a positioning device, saving costs and reducing installation operations. When the fixed fixture 300 is placed into the excitation hole 110, the outer cylinder 312 just falls into the excitation groove 120 of the spark table 100 to achieve positioning.

[0058] In addition, the height of the sample stage 3131 of the fixed fixture 300 is designed to be the same as the depth of the excitation groove 120. After the two are matched, the sample excitation surface and the upper surface of the spark table 100 are exactly on the same plane, and a good excitation effect can be obtained, avoiding the defects of the existing fixtures.

[0059] After the fixed fixture 300 is positioned, the sealed cover 200 with a spring is placed over the fixed fixture 300, and the spring presses down on the fixture to firmly fix the fixture on the spark table 100.

[0060] At the same time, the sealed cover 200 is a structure that closely fits the fixed fixture 300. When designing, the volume of the cavity remaining after the fit is minimized as much as possible, which can ensure the rapid replacement of the gas in the cavity during excitation, forming a pure argon environment and being beneficial to the excitation effect of the sample.

[0061] The above embodiments are only specific implementation manners of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: Any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention.

Claims

1. A filamentous sample fixing fixture for spark spectrometer detection, characterized in that, It includes a jacket (320) and a sample holder (310), and the height of the sample holder (310) is greater than the height of the jacket (320); The sample holder (310) is composed of a handle (311) and an outer cylinder (312). A rectangular through-hole (313) is provided on the outer surface of the outer cylinder (312), and a sample table (3131) for placing a filamentous sample (400) is formed due to the rectangular through-hole (313); The jacket (320) is connected to the outer cylinder (312) of the sample holder (310) and is pressed down to fix the filamentous sample (400) placed on the sample table (3131).

2. The filamentous sample fixing fixture for spark spectrometer detection according to claim 1, characterized in that, The jacket (320) is of a hollow structure and is provided with a first cavity (321) and a second cavity (322). The inner diameter of the first cavity (321) is smaller than the inner diameter of the second cavity (322). The jacket (320) is threadedly connected to the outer cylinder (312) through the first cavity (321).

3. The filamentous sample fixing fixture for spark spectrometer detection according to claim 2, characterized in that, The inner diameter of the outer cylinder (312) is smaller than the inner diameter of the second cavity (322).

4. The filament sample fixing fixture for spark spectrometer detection according to claim 1, wherein A hollow arc top (314) is provided in the rectangular through-hole (313), and the hollow arc top (314) is located directly above the filamentous sample (400).

5. The filamentous sample fixing fixture for spark spectrometer detection according to claim 1, characterized in that, It further includes a sealing cover (200) that covers the jacket (320). The inside of the sealing cover (200) has a shape structure for cooperating with the jacket (320) and the sample holder (310). The sealing cover (200) is inserted along the height direction of the sample holder (310) to cover the jacket (320) and the sample holder (310).

6. The filament sample fixing fixture for spark spectrometer detection according to claim 5, characterized in that, The sealing cover (200) has a positioning cavity (210) for cooperating with the sample holder (310), a limiting cavity (220) for cooperating with the jacket (320), and a reserved cavity (240). The limiting cavity (220) is further provided with a limiting groove (230) for fixing a spring, and the spring is located above the jacket (320).

7. The filament sample fixing jig for spark spectrometer detection according to claim 6, characterized in that, The inner diameter of the limiting cavity (220) is greater than the inner diameter of the positioning cavity (210), and the inner diameter of the reserved cavity (240) is greater than the inner diameter of the limiting cavity (220).

8. The filamentous sample fixing fixture for spark spectrometer detection according to claim 1, characterized in that, It further includes a spark table (100) for exciting the filamentous sample (400). The spark table (100) is provided with an excitation hole (110), and an excitation groove (120) for cooperating with the sample holder (310) is provided outside the excitation hole (110).

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