A clamp for gripping graphite tubes

Abstract

This utility model provides a clamp for gripping graphite tubes, relating to the field of elemental detection technology. The clamp is an insulated clamp and includes: two rods, which are arranged crosswise and hinged at the intersection; two elastic members, one end of which is connected to one end of each of the two rods; two rotation adjustment mechanisms, each connected to the other end of each of the two elastic members; and two clamps, which are arranged opposite each other, with grooves on their opposite sides for gripping the graphite tube. The two clamps are connected to the rotating ends of the two rotation adjustment mechanisms, and the rotation angle of the two clamps can be adjusted according to the setting angle of the graphite tube in the atomic absorption spectrometer. This design facilitates operation and installation by experimental personnel, while preventing the rods or hands from obstructing the operator's view, thus improving the accuracy of graphite tube installation.

Description

Technical Field

[0001] This utility model belongs to the field of element detection technology, and more specifically, relates to a clamp for gripping graphite tubes. Background Technology

[0002] In atomic absorption spectrometry (AAS) for heavy metal detection, the graphite tube is a crucial component. After the AAS is started and the program is set, the sample is tested. The graphite furnace heats the sample according to the program requirements, typically reaching a maximum temperature of 1200℃. Repeated high-temperature cycles can damage the graphite tube. After approximately 200 cycles, the graphite tube will develop cracks, small holes, and deformation, rendering it unusable. High concentrations of acid in the sample will also cause wear and tear on the graphite tube. These are normal experimental losses, therefore, the graphite tube needs to be replaced periodically.

[0003] Because the graphite tube is located at the center of the high-voltage power supply of the atomic absorption spectrometer, direct contact by the experimenter could easily cause an electric shock, and currently there is no clearly defined tool for its use. Figure 1 As shown, most laboratories use traditional wooden clamps (12) as tools. These tools are prone to deformation, instability, and inconvenience in use. Traditional wooden clamps present two problems when gripping graphite tubes: firstly, the handles are too short, easily obstructing the operator's view and hindering accurate placement of the graphite tube; secondly, the clamping point is prone to loosening and shifting when holding the graphite tube. This loosening and shifting prevents the clamp from firmly holding the tube, making it impossible to install in the correct position, thus affecting the accuracy and success rate of the operation and easily leading to failure. Utility Model Content

[0004] The purpose of this invention is to provide a clamp for holding graphite tubes to address the shortcomings of existing technologies. This solves the problem mentioned in the background art that when replacing graphite tubes in an atomic absorption spectrometer, wooden clamps are used for clamping and replacing, but these wooden clamps are inconvenient to use and unstable.

[0005] To achieve the above objectives, this utility model provides a clamp for gripping graphite tubes, the clamp being an insulating clamp, which includes:

[0006] Two lever arms are arranged crosswise, and the two lever arms are hinged at the point of intersection;

[0007] Two elastic elements, one end of each of the two elastic elements being connected to one end of each of the two lever arms;

[0008] Two rotary adjustment mechanisms are provided, each of which is connected to the other end of one of the two elastic elements.

[0009] Two clamps are arranged opposite each other, and the opposite side of the two clamps is provided with a groove for clamping the graphite tube. The two clamps are respectively connected to the rotating ends of the two rotation adjustment mechanisms, and the rotation angle of the two clamps can be adjusted according to the setting angle of the graphite tube in the atomic absorption spectrometer.

[0010] Preferably, the groove is arc-shaped.

[0011] Preferably, the groove is V-shaped.

[0012] Preferably, the insulating clamp is a plastic clamp.

[0013] Preferably, the rotation adjustment mechanism includes:

[0014] Two cylindrical bodies, one end of each of the two cylindrical bodies being connected to the opposite sides of the two clamps, and the sidewalls of the cylindrical bodies being provided with threaded holes;

[0015] Two shafts, one end of each shaft is rotatably connected to the two cylinders, and the other end of each shaft is connected to the other end of each elastic element.

[0016] Two bolts, each of which is threaded into one of the two threaded holes.

[0017] Preferably, the clamp for gripping the graphite tube further includes:

[0018] Two bases are provided, each of which is connected to one end of one of the two clamps. Both bases are provided with through holes. When the rotation angles of the two clamps are the same, the center lines of the two through holes are on the same straight line.

[0019] The needle body is capable of penetrating both of the through holes.

[0020] Preferably, the other end of both arms is bent to form a finger opening.

[0021] Preferably, the elastic element is a spring.

[0022] Preferably, when the two clamps are close to each other, the two grooves can form a circular hole with a diameter of 0.5 cm.

[0023] Preferably, the length of the lever arm is 10cm.

[0024] This utility model provides a clamp for gripping graphite tubes, which has the following advantages: the clamp is an insulated clamp, preventing electric shock accidents during use; the two arms of the clamp are cross-hinged, and operating the other end of the two arms controls the two clamps to grip or release the graphite tube; an elastic element is provided between one end of the clamp arm and the mating clamp, and grooves are provided on the opposite sides of the two clamps. When the grooves of the two clamps grip the graphite tube, the grooves can restrict the position of the graphite tube, and the elastic element can play a buffering role, preventing the graphite tube from being rigidly clamped and damaged. At the same time, the elastic element can also improve the elastic clamping force and prevent damage. The fixture prevents graphite tubes from shifting during clamping, ensuring accurate installation in their designated positions. It allows for free clamping and detachment of the graphite tube without displacement, improving installation accuracy and success rate. The fixture's two rotary adjustment mechanisms are connected to the other ends of two elastic components, and the two clamps are connected to the rotating ends of the two adjustment mechanisms. The rotation angle of the two clamps can be adjusted according to the set angle of the graphite tube within the atomic absorption spectrometer, or according to the internal space of the spectrometer. This facilitates operation and installation by experimental personnel, preventing the rod or hand from obstructing their view and improving the accuracy of graphite tube installation.

[0025] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0026] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0027] Figure 1 A schematic diagram of the wooden clip structure is shown;

[0028] Figure 2 A schematic diagram of the structure of a clamp for gripping a graphite tube according to an embodiment of the present invention is shown when the groove is arc-shaped;

[0029] Figure 3 It shows Figure 2 Schematic diagram of the structure at point A in the middle;

[0030] Figure 4 A schematic diagram of the structure of a clamp for gripping a graphite tube according to an embodiment of the present invention is shown when the groove is V-shaped.

[0031] Figure 5 A schematic diagram of the structure of a clamp for gripping a graphite tube according to an embodiment of the present invention is shown when the chuck is rotated at a certain angle.

[0032] Figure 6 The diagram shows a schematic representation of the structure of a clamp for gripping a graphite tube in an atomic absorption spectrometer, according to an embodiment of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Lever arm; 2. Elastic element; 3. Rotation adjustment mechanism; 4. Clamp; 5. Graphite tube; 6. Atomic absorption spectrometer; 7. Cylinder; 8. Shaft; 9. Bolt; 10. Base; 11. Needle; 12. Wooden clamp. Detailed Implementation

[0035] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0036] like Figures 2-6 As shown, this utility model provides a clamp for gripping graphite tubes. The clamp is an insulating clamp and includes:

[0037] Two lever arms 1 are arranged crosswise, and the two lever arms 1 are hinged at the point of intersection;

[0038] Two elastic elements 2, one end of each elastic element 2 is connected to one end of each of the two lever arms 1;

[0039] Two rotary adjustment mechanisms 3 are respectively connected to the other end of two elastic elements 2;

[0040] Two clamps 4 are arranged opposite each other, and the opposite side of the two clamps 4 is provided with a groove for clamping the graphite tube 5. The two clamps 4 are respectively connected to the rotating ends of two rotation adjustment mechanisms 3. The rotation angle of the two clamps 4 can be adjusted according to the setting angle of the graphite tube 5 in the atomic absorption spectrometer 6.

[0041] Specifically, to address the issue of using wooden clamps for graphite tube replacement in atomic absorption spectrometers, which are inconvenient and unstable, this invention provides a clamp for gripping graphite tubes. The clamp's elastic element 2 is a spring, and the clamp itself is insulated to prevent electric shock. The two lever arms 1 are cross-hinged, allowing the two clamps 4 to grip or release the graphite tube when the other end of the lever arms 1 is operated. An elastic element 2 is provided between one end of each lever arm 1 and the corresponding clamp 4. The opposing sides of the two clamps 4 have grooves. When the grooves of the two clamps 4 grip the graphite tube 5, the grooves restrict the position of the graphite tube 5, and the elastic element 2 acts as a buffer, preventing damage from rigid clamping. Simultaneously, the elastic element 2 also increases the elastic clamping force, preventing damage to the graphite tube 5. The loosening and shifting during clamping allows the graphite tube 5 to be accurately installed in the corresponding position, enabling the graphite tube 5 to be freely clamped and separated without displacement, thus improving installation accuracy and success rate. To avoid the limited internal installation space of the atomic absorption spectrometer 6, which makes it difficult to freely extend and move, the fixture is equipped with two rotation adjustment mechanisms 3. The two rotation adjustment mechanisms 3 are respectively connected to the other end of two elastic elements 2, and the two clamps 4 are respectively connected to the rotating ends of the two rotation adjustment mechanisms 3. The rotation angle of the two clamps 4 can be adjusted according to the setting angle of the graphite tube 5 in the atomic absorption spectrometer 6, or according to the internal space of the atomic absorption spectrometer 6. Preferably, the rotation angle of the clamps 4 based on the fixture body is 120 degrees, which facilitates the installation and operation of the experimenter, and at the same time avoids the rod arm 1 or the hand from blocking the experimenter's line of sight, thus improving the installation accuracy of the graphite tube 5.

[0042] Preferably, a hinge hole is provided at the intersection of the two rod arms 1, and a hinge shaft passes through the hinge hole.

[0043] Specifically, the existing wooden clamps are prone to loosening at the joints and deformation after long-term use. This loosening and deformation prevents the wooden clamps from firmly gripping the graphite tube 5, thus affecting the accuracy and success rate of the operation and easily leading to operation failure. To solve this problem, a hinge shaft is used to connect the two lever arms 1 to clamp the graphite tube 5 in a cross-hinged manner. Compared with the wooden clamps, this clamp is less prone to loosening at the joints and deformation during long-term use, and can firmly grip the graphite tube 5, thereby improving the accuracy and success rate of the operation and avoiding operation failure.

[0044] like Figure 2 As shown, preferably, the groove is arc-shaped.

[0045] Specifically, when clamping the graphite tube 5, the arc-shaped groove can restrict the position of the graphite tube 5, prevent the graphite tube 5 from shifting, and accurately install the graphite tube 5 into the corresponding position.

[0046] like Figure 4 As shown, preferably, the groove is V-shaped.

[0047] Specifically, when clamping the graphite tube 5, the V-shaped groove can restrict the position of the graphite tube 5, prevent the graphite tube 5 from shifting, and accurately install the graphite tube 5 into the corresponding position.

[0048] Preferably, the insulating clamp is a plastic clamp.

[0049] Specifically, the plastic clamps are made of high-temperature resistant plastic to prevent electric shock accidents during operation.

[0050] like Figure 3 As shown, preferably, the rotary adjustment mechanism includes:

[0051] Two cylinders 7, one end of each cylinder 7 is connected to the opposite side of two clamps 4, and the side wall of each cylinder 7 is provided with threaded holes.

[0052] Two shafts 8, one end of each shaft 8 is rotatably connected to two cylinders 7, and the other end of each shaft 8 is connected to the other end of two elastic elements 2.

[0053] Two bolts 9 are threaded into two threaded holes respectively.

[0054] Specifically, when adjusting the angle of the chuck 4, first loosen the bolt 9 and rotate the chuck 4. At this time, the cylinder 7 and the shaft 8 rotate. When the chuck 4 rotates to the set angle, tighten the bolt 9 so that the bolt 9 presses against the side wall of the shaft 8 to prevent the cylinder 7 from rotating. At this time, the chuck 4 is adjusted.

[0055] like Figure 3 As shown, preferably, the clamp for gripping the graphite tube further includes:

[0056] Two bases 10 are connected to one end of two chucks 4 respectively. Both bases 10 are provided with through holes. When the rotation angles of the two chucks 4 are the same, the center lines of the two through holes are on the same straight line.

[0057] Needle body 11, needle body 11 can penetrate two through holes.

[0058] Specifically, when adjusting the angle of the chuck 4, the needle body 11 can be passed through the two through holes to connect the two seats 10 together. At this time, the angle of the two chucks 4 can be adjusted to avoid errors in the adjustment angle of the two chucks 4, which would prevent the graphite tube 5 from being clamped.

[0059] Preferably, the other end of both lever arms 1 is bent to form a finger opening.

[0060] Specifically, the finger opening is for inserting fingers, making it easier for the experimenter to operate the clamp.

[0061] Preferably, when the two clamps 4 are close to each other, the two grooves can form a circular hole with a diameter of 0.5 cm.

[0062] Specifically, the two grooves can be brought close together to hold the graphite tube 5.

[0063] Preferably, the length of lever arm 1 is 10cm.

[0064] Specifically, lever arm 1 is a slender lever arm with a length of 10cm, which can keep the hand a certain distance from the graphite tube 5 to prevent the hand from blocking the tester's view.

[0065] In summary, when replacing the graphite tube 5 inside the atomic absorption spectrometer 6, the rotation angle of the two clamps 4 can be adjusted according to the setting angle of the graphite tube 5 inside the atomic absorption spectrometer 6, or according to the internal space of the atomic absorption spectrometer 6. This facilitates the operation and installation by the experimenter, while preventing the rod arm 1 or the hand from obstructing the experimenter's view, thus improving the accuracy of the graphite tube 5 installation. Then, by operating the other end of the two rod arms 1, the two clamps 4 are controlled to grip or release the graphite tube 5. When the grooves of the two clamps 4 grip the graphite tube 5... The groove restricts the position of the graphite tube 5, and the elastic element 2 acts as a buffer to prevent the graphite tube 5 from being damaged by rigid clamping. At the same time, the elastic element 2 can also improve the elastic clamping force to prevent the graphite tube 5 from loosening or shifting during clamping. The graphite tube 5 can be accurately installed in the corresponding position, and the graphite tube 5 can be freely clamped and separated without displacement. The central injection port of the graphite tube 5 can be aligned with the center, and the injection needle can accurately enter the interior of the graphite tube 5, avoiding damage and deformation of the injection needle. This improves the installation accuracy and success rate, and avoids the need for multiple installations that extend the experimental cycle.

[0066] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A clamp for gripping graphite tubes, characterized in that, The clamp is an insulating clamp, which includes: Two lever arms are arranged crosswise, and the two lever arms are hinged at the point of intersection; Two elastic elements, one end of each of the two elastic elements being connected to one end of each of the two lever arms; Two rotary adjustment mechanisms are provided, each of which is connected to the other end of one of the two elastic elements. Two clamps are arranged opposite each other, and the opposite side of the two clamps is provided with a groove for clamping the graphite tube. The two clamps are respectively connected to the rotating ends of the two rotation adjustment mechanisms. The rotation angle of the two clamps can be adjusted according to the setting angle of the graphite tube in the atomic absorption spectrometer. The groove is arc-shaped or V-shaped.

2. The clamp for gripping graphite tubes according to claim 1, characterized in that, The insulating clamp is a plastic clamp.

3. The clamp for gripping graphite tubes according to claim 1, characterized in that, The rotary adjustment mechanism includes: Two cylindrical bodies, one end of each of the two cylindrical bodies being connected to the opposite sides of the two clamps, and the sidewalls of the cylindrical bodies being provided with threaded holes; Two shafts, one end of each shaft is rotatably connected to the two cylinders, and the other end of each shaft is connected to the other end of each elastic element. Two bolts, each of which is threaded into one of the two threaded holes.

4. The clamp for gripping graphite tubes according to claim 1, characterized in that, The clamp for gripping the graphite tube also includes: Two bases are provided, each of which is connected to one end of one of the two clamps. Both bases are provided with through holes. When the rotation angles of the two clamps are the same, the center lines of the two through holes are on the same straight line. The needle body is capable of penetrating both of the through holes.

5. The clamp for gripping graphite tubes according to claim 1, characterized in that, The other end of both of the lever arms is bent to form a finger opening.

6. The clamp for gripping graphite tubes according to claim 1, characterized in that, The elastic element is a spring.

7. The clamp for gripping graphite tubes according to claim 1, characterized in that, When the two clamps are brought close together, the two grooves can form a circular hole with a diameter of 0.5 cm.

8. The clamp for gripping graphite tubes according to claim 1, characterized in that, The length of the lever arm is 10cm.

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