Sample loading device for carbon rod electrode in arc direct-reading emission spectrum measurement

Abstract

The utility model discloses a sample loading device for a carbon rod electrode in arc direct-reading emission spectrum measurement, which comprises a motor, a speed regulator, a rotating shaft, a grip and a sample loading tank for uniformly mixing a sample to be measured and a buffering agent, an assembling cavity with one end penetrating through is formed in the grip in the length direction, the motor is arranged at the bottom of the assembling cavity, a power line of the motor extends out of the assembling cavity and is connected with the speed regulator, and the rotating shaft is assembled in the assembling cavity through a bearing and is connected with an output shaft of the motor through a spline. The other end of the rotating shaft extends out of the assembling cavity and is provided with a chuck for assembling a carbon rod electrode, and the carbon rod electrode can be inserted into the sample loading tank after being assembled on the chuck. According to the utility model, the motor, the speed regulator, the rotating shaft and the grip are matched with one another to form a rotating mechanism with a controllable rotating speed so as to replace manual holding of a carbon rod electrode for rotary sample loading, so that the analysis and test efficiency is ensured while the labor cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of geological experimental measurement, and in particular to a sample loading device for carbon rod electrodes in arc direct-reading emission spectroscopy measurement. Background Technology

[0002] Arc emission spectroscopy is a commonly used inorganic analytical instrument in geological and mineral laboratories. It is frequently used to determine the content of elements such as silver, boron, and tin in geological samples including rocks, soils, and stream sediments, as illustrated in the published geological and mineral industry standard, "Regional Geochemical Sample Analysis Methods Part 11: Determination of Silver, Boron, and Tin Content by AC Arc-Emission Spectroscopy (DZ / T 0279.11-2016)". Because the accompanying chemical analysis methods typically do not require the consumption of chemical reagents such as acids and alkalis, it is significantly environmentally friendly. Therefore, in recent years, there have been increasing reports on the application of this instrument for the accurate determination of the content of elements such as copper, lead, zinc, and molybdenum in geological samples.

[0003] Although the chemical analysis method for geological samples based on direct-reading emission spectroscopy using electric arc is a typical green chemical analysis technique, its sample preparation process requires considerable manpower and time. Current sample preparation typically involves three steps: weighing, mixing, and loading. Weighing is the simplest, and mixing is already automated. However, loading requires the operator to manually insert a carbon electrode into the sample repeatedly until it is full, compacted, and smoothed. This prolonged, repetitive manual loading process causes hand pain and stiffness, affecting loading efficiency and increasing the risk of hand muscle strain and other health problems for the operator. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a sample loading device for carbon rod electrodes in arc direct-reading emission spectroscopy.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A sample loading device for carbon rod electrodes in direct-reading emission spectroscopy of electric arc includes a motor, a speed controller, a rotating shaft, and a handle, as well as a sample loading container for mixing the sample and buffer. The handle has a through-hole assembly cavity along its length. A motor is located at the bottom of the assembly cavity, with its power cord extending out of the cavity and connected to the speed controller. The rotating shaft is mounted inside the assembly cavity via bearings and connected to the motor's output shaft via a spline. The other end of the rotating shaft extends out of the assembly cavity and is equipped with a chuck for loading the carbon rod electrode. Once the carbon rod electrode is loaded onto the chuck, it can be inserted into the sample loading container. This invention utilizes the motor, speed controller, rotating shaft, and handle to form a controllable rotation mechanism. The chuck is then used to load the carbon rod electrode onto the rotating mechanism, replacing the need to manually rotate the carbon rod electrode during sample loading.

[0007] Preferably, the grip is provided with a clearance hole at the bottom of the assembly cavity to allow the power cord to pass through.

[0008] Preferably, the chuck includes a connecting rod and a clamping component. The clamping component includes multiple jaws that are uniformly fixed to the end of the connecting rod along the circumferential direction, and there is a gap between two adjacent jaws. The multiple jaws form a clamping groove. The carbon rod electrode is detachably inserted into the clamping groove. The end of the rotating shaft away from the motor is provided with a threaded groove, and the connecting rod is screwed onto the threaded groove to facilitate the replacement of the chuck.

[0009] Preferably, the chuck further includes a tension cap, which has tension holes through both ends. One end of the tension hole passes through the carbon rod electrode, the clamping groove, and the connecting rod in sequence, and is then screwed onto the rotating shaft. The diameter of the other end decreases. The outer diameter of the clamping groove decreases in the direction away from the carbon rod electrode and matches the decreasing end of the tension hole, so that the carbon rod electrode is securely assembled on the clamping groove.

[0010] Preferably, the motor speed is less than 2 r / s.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This invention utilizes a motor, speed controller, rotating shaft, and handle to form a controllable rotation mechanism, replacing manual hand-held carbon rod electrode rotation for sample loading. This reduces the risk of hand muscle strain and avoids the problem of decreased loading efficiency due to finger fatigue during sample loading. It effectively reduces labor costs while ensuring analytical testing efficiency. Attached Figure Description

[0013] Figure 1 This is a side view of the present invention;

[0014] Figure 2 This is a cross-sectional view of the present invention;

[0015] Figure 3 This is a cross-sectional view of the chuck of this utility model.

[0016] Attached diagram labels: 1. Motor, 11. Power cord, 2. Speed ​​controller, 3. Rotating shaft, 4. Handle, 41. Assembly cavity, 5. Bearing, 6. Carbon rod electrode, 7. Chuck, 71. Connecting rod, 72. Clamp, 73. Tensioning cap, 731. Tensioning hole. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0018] Example 1

[0019] like Figure 1-2 The device shown is a sample loading device for carbon rod electrodes in direct-reading emission spectroscopy of electric arc, including a motor 1, a speed controller 2, a rotating shaft 3, and a handle 4, as well as a sample loading container for mixing the sample to be tested and a buffer. The handle 4 has an assembly cavity 41 that extends through one end along its length. The bottom of the assembly cavity 41 is equipped with the motor 1. The power cord 11 of the motor 1 extends out of the assembly cavity 41 and is connected to the speed controller 2. The rotating shaft 3 is assembled in the assembly cavity 41 through a bearing 5 and is connected to the output shaft of the motor 1 through a spline. The other end of the rotating shaft 3 extends out of the assembly cavity 41 and is equipped with a chuck 7 for assembling a carbon rod electrode 6. After the carbon rod electrode 6 is assembled on the chuck 7, it can be inserted into the sample loading container. In practice, the sample to be tested and the buffer are first mixed in the sample container. Then, the carbon rod electrode 6 is mounted on the chuck 7. Next, the operator holds the handle 4 and starts the motor 1, which drives the carbon rod electrode 6 to rotate via the rotating shaft 3. Finally, the operator inserts the carbon rod electrode 6 into the sample container using the handle 4 and pushes it towards the bottom of the container. During this process, the mixture in the sample container enters the grooved end of the carbon rod electrode 6. When it reaches the bottom of the container, it is slightly compacted. This operation is then repeated to areas with more mixture until the sample is fully filled. Finally, the friction at the bottom of the container is used to flatten the filled end of the carbon rod electrode 6. After filling, the speed controller 2 is reset to zero, and the carbon rod electrode 6 is replaced on the chuck 7 for a new round of sample filling until all samples to be tested are filled. Preferably, during the filling process, the speed controller 2 controls the motor 1 to rotate below 2 r / s to prevent the sample in the sample container from splashing due to excessive rotation of the carbon rod electrode 6.

[0020] This invention utilizes a motor 1, a speed controller 2, a rotating shaft 3, and a handle 4 to form a rotating mechanism with controllable rotation speed. The carbon rod electrode 6 is assembled onto the rotating mechanism using a clamp 7. During the sample loading process of the carbon rod electrode 6, the rotating mechanism replaces manual hand-held rotation of the carbon rod electrode 6 to reduce the risk of hand muscle strain for experimental personnel and avoid the problem of decreased loading efficiency caused by finger fatigue during sample loading. It effectively reduces labor costs while ensuring analytical testing efficiency.

[0021] As a preferred embodiment of the above, the grip 4 is provided with a clearance hole at the bottom of the assembly cavity 41 for the power cord 11 to pass through.

[0022] As a preferred embodiment of the above, the chuck 7 includes a connecting rod 71 and a clamping member. The clamping member includes a plurality of jaws 72 that are uniformly fixed to the end of the connecting rod 71 along the circumferential direction, and there is a gap between two adjacent jaws 72. The plurality of jaws 72 together form a clamping groove. The carbon rod electrode 6 is detachably inserted into the clamping groove. The end of the rotating shaft 3 away from the motor 1 is provided with a threaded groove, and the connecting rod 71 is screwed onto the threaded groove to realize the detachable connection between the chuck 7 and the rotating shaft 3. In this embodiment, the chuck 7 is made of plastic. By utilizing its deformation ability and deformation recovery ability, carbon rod electrodes 6 of different diameters can be assembled into the clamping groove.

[0023] As a preferred embodiment of the above, the chuck 7 further includes a tension cap 73, which has a tension hole 731 extending through both ends. One end of the tension hole 731 passes through the carbon rod electrode 6, the clamping groove, and the connecting rod 71 in sequence before being fitted onto the rotating shaft 3 and screwed on. The diameter of the other end decreases, and the outer diameter of the clamping groove decreases in the direction away from the carbon rod electrode 6, matching the decreasing end of the tension hole 731. By rotating and adjusting the position of the tension cap 73 on the rotating shaft 3, the relative position of the tension cap 73 and the clamping groove changes. During this process, the decreasing end of the tension hole 731 and the decreasing end of the outer diameter of the clamping groove cooperate with each other, causing the gap between two adjacent jaws 72 to change, thereby changing the opening diameter of the clamping groove to ensure that the carbon rod electrode 6 is securely assembled on the clamping groove.

[0024] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A sample loading device for a carbon rod electrode in direct-reading emission spectroscopy of an electric arc, characterized in that, Includes a motor (1), a speed controller (2), a rotating shaft (3) and a handle (4), as well as a sample container for mixing the sample to be tested and the buffer. The handle (4) has an assembly cavity (41) extending through one end along its length. The motor (1) is located at the bottom of the assembly cavity (41). The power cord (11) of the motor (1) extends out of the assembly cavity (41) and is connected to the speed controller (2). The rotating shaft (3) is mounted in the assembly cavity (41) via a bearing (5) and is connected to the output shaft of the motor (1) via a spline. The other end of the rotating shaft (3) extends out of the assembly cavity (41) and is provided with a chuck (7) for mounting a carbon rod electrode (6). When the carbon rod electrode (6) is mounted on the chuck (7), it can be inserted into the sample container.

2. The sample loading device for carbon rod electrodes in direct-reading emission spectroscopy of electric arcs according to claim 1, characterized in that, The grip (4) is provided with a clearance hole at the bottom of the assembly cavity (41) for the power cord (11) to pass through.

3. The sample loading device for carbon rod electrodes in direct-reading emission spectroscopy of electric arcs according to claim 2, characterized in that, The chuck (7) includes a connecting rod (71) and a clamping member. The clamping member includes a plurality of jaws (72) evenly fixed along the circumferential direction at the end of the connecting rod (71), and there is a gap between two adjacent jaws (72). The plurality of jaws (72) form a clamping groove. The carbon rod electrode (6) is detachably inserted into the clamping groove. The end of the rotating shaft (3) away from the motor (1) is provided with a threaded groove, and the connecting rod (71) is screwed onto the threaded groove.

4. The sample loading device for carbon rod electrodes in direct-reading emission spectroscopy of electric arcs according to claim 3, characterized in that, The clamp (7) also includes a tension cap (73), which has a tension hole (731) through both ends. One end of the tension hole (731) is successively fitted onto the rotating shaft (3) after passing through the carbon rod electrode (6), the clamping groove and the connecting rod (71) and screwed on. The diameter of the other end decreases. The outer wall diameter of the clamping groove decreases in the direction away from the carbon rod electrode (6) and matches the decreasing end of the tension hole (731).

5. The sample loading apparatus for carbon rod electrodes in direct-reading emission spectroscopy of electric arcs according to any one of claims 1-4, characterized in that, The speed of the motor (1) is less than 2 r / s.

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