Crucible clamping device for soil digestion
By designing a crucible clamping device with two-hand operation, the problem of uneven shaking caused by traditional one-hand operation is solved, the solid clamping and uniform shaking of the crucible is achieved, and the accuracy and safety of soil digestion experiments are improved.
Patent Information
- Application Number
- CN202422562921.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-23
AI Technical Summary
In the prior art, the traditional crucible tongs have one-handed operation resulting in uneven shaking of the crucible during soil digestion, affecting the experimental results.
A crucible clamping device consisting of a first clamping part and a second clamping part is designed. The two are connected by a rotating shaft. The clamping part is equipped with a fastening notch and a clamping ring. The clamping ring has an anti-slip mark, a hand-held groove and a thumb groove. The clamping part is equipped with a heat insulation layer, a clamping groove and a mounting table structure, which is convenient for both hands and stable clamping.
The uniform shaking of the crucible is achieved, avoiding clamping instability and scalding, improving the accuracy of experimental results, reducing operating errors, and providing comfortable feel and safety.
Smart Images
Figure CN223251410U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of inspection and detection, and particularly relates to a crucible clamping device for soil digestion. Background Art
[0002] When determining total potassium in forest soil, the acid digestion-inductively coupled plasma optical emission spectrometry method is often used according to the "Determination of Potassium in Forest Soils" (LY / T 1234-2015). Before beginning the measurement, the test solution must be prepared. The specific process involves weighing a sieved, air-dried sample into a platinum or polytetrafluoroethylene crucible and using a plastic pipette to add concentrated nitric acid, perchloric acid, and hydrofluoric acid. Cover the crucible, place it on a hot plate, and heat it in a fume hood from a low temperature of 130°C to a high temperature of 200°C. Shake the crucible occasionally to achieve good silicon removal (HF reacts with silicon to form SiF4, which evaporates). Once a large amount of white smoke emerges, continue heating until the smoke disappears and the sample is nearly dry. Depending on the amount of residue in the crucible, continue adding hydrofluoric acid and perchloric acid and repeat the digestion process. If only a white residue remains in the crucible, add hydrofluoric acid to remove the residual silicon. Then, add a few drops of perchloric acid and heat until nearly dry. Remove the crucible and cool it. Add hydrochloric acid solution and heat until the residue dissolves. Transfer the solution to a volumetric flask with water, adjust to volume, and mix thoroughly. Achieving good silicon removal during the preparation of the test solution is crucial to the success of the experiment. Among the factors that determine the effectiveness of silicon removal, the most critical one is whether the crucible can be shaken properly during the digestion process.
[0003] In the prior art, traditional crucible clamps are often used to shake the crucible during the digestion process. However, these conventional crucibles can only be operated with one hand, resulting in unsatisfactory shaking effects and thus affecting the final results of the experiment. Therefore, developing a crucible clamping device that can be easily operated with both hands is an urgent problem to be solved in the prior art. Utility Model Content
[0004] The purpose of the utility model is to solve the deficiencies of the prior art and provide a crucible clamping device for soil digestion, specifically a device for clamping the crucible and conveniently shaking it during the process of determining total potassium in forest soil and digesting the soil when preparing the test solution.
[0005] The utility model is realized through the following technical solutions:
[0006] A crucible clamping device for soil digestion consists of a first clamping part and a second clamping part, one end of the first clamping part is rotatably arranged on one end of the second clamping part through a rotating shaft, and the other end of the first clamping part is provided with a fastening recess; a fastening buckle is rotatably provided on the end of the second clamping part corresponding to the fastening recess; the middle parts of the first clamping part and the second clamping part are both bent to form a semicircular clamping ring, and the clamping ring is provided with anti-slip grooves; a wavy hand-holding groove is respectively provided at both ends of the first clamping part, and two thumb grooves are also provided on the second clamping part, and the two thumb grooves are respectively provided on both sides of the clamping ring.
[0007] The minimum distance between the midpoint of the thumb groove and the end point of the second clamping part is 9-13 cm, and the minimum distance between the end point of the hand-holding groove close to the clamping ring and the end point of the second clamping part is 10-14 cm.
[0008] The first clamping part and the second clamping part are both provided with a heat insulation layer; the length of the heat insulation layer is 8-12 cm.
[0009] The thermal insulation layer provided on the first clamping part completely covers and wraps the hand-holding groove; the thermal insulation layer provided on the second clamping part has the same length as the thermal insulation layer provided on the first clamping part; the minimum distance between the midpoint of the thermal insulation layer provided on the second clamping part and the end point of the second clamping part = the minimum distance between the midpoint of the thermal insulation layer provided on the first clamping part and the end point of the first clamping part.
[0010] The second clamping part is provided with two bosses on one end of the rotating shaft, and the two bosses and the second clamping part together form a "concave" type slot; the first clamping part is provided with a convex block on one end of the rotating shaft, and the convex block and the first clamping part form a "convex" type mounting platform; the convex block is set in the slot, and the rotating shaft passes through the boss and the convex block to set the first clamping part on the second clamping part.
[0011] A cover cap is respectively provided at both ends of the rotating shaft.
[0012] The thickness of the heat insulation layer is 1-3 mm.
[0013] The distance between the bump and the two bosses is 3-5 mm.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. When the device of the present invention is in use, the crucible is clamped by the clamping ring, and the operator holds the two ends of the clamping part (the first clamping part and the second clamping part) with both hands to shake it, so that the shaking is more uniform and sufficient, which can better meet the requirements of the test.
[0016] 2. The utility model provides a fastening notch and a fastening buckle, and through the cooperation of the fastening notch and the fastening buckle, the clamping device of the utility model can be locked after clamping the crucible, thereby avoiding operational errors caused by unstable crucible clamping during the test.
[0017] 3. The utility model provides a hand-holding groove and a thumb groove so that the operator can place his palms in them better during use, thus avoiding excessive friction of the clamping part on the hand during long-term testing.
[0018] 4. Since the crucible needs to be continuously heated during the digestion process, an insulation layer is provided to block the heat transferred from the crucible, thereby preventing the test personnel from being burned.
[0019] 5. By providing a card slot and a mounting platform, and setting the protrusion in the card slot, passing the rotating shaft through the protrusion and the protrusion, and setting the first clamping part on the second clamping part, the device of the utility model is opened and closed more smoothly.
[0020] 6. The utility model is provided with anti-slip grooves in the clamping ring, which makes it more stable to clamp the crucible and can effectively prevent the crucible from shaking and sliding during the shaking process. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the structure of the utility model.
[0022] Figure 2 This is a schematic diagram of the connection between the first clamping part and the second clamping part.
[0023] In the figure: 1-first clamping part, 2-second clamping part, 3-clamping ring, 4-anti-slip groove, 5-heat insulation layer, 6-fastening notch, 7-fastening buckle, 8-thumb groove, 9-handling groove, 10-rotating shaft, 11-boss, 12-bump, 13-cap. DETAILED DESCRIPTION
[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, but the protection scope of the present invention is not limited by the embodiments. Example 1
[0025] A crucible clamping device for soil digestion comprises a first clamping portion and a second clamping portion. One end of the first clamping portion is rotatably mounted on one end of the second clamping portion via a rotating shaft, and the other end of the first clamping portion is provided with a fastening notch. A fastening buckle is rotatably mounted on the end of the second clamping portion corresponding to the fastening notch. The middle portions of the first and second clamping portions are curved to form a semicircular clamping ring, each of which has anti-slip grooves. A wavy gripping groove is provided at each end of the first clamping portion, and two thumb grooves are provided on the second clamping portion, one on each side of the clamping ring. The minimum distance between the midpoint of the thumb groove and the endpoint of the second clamping portion is 9 cm, and the minimum distance between the endpoint of the gripping groove on the side closest to the clamping ring and the endpoint of the second clamping portion is 10 cm.
[0026] The first and second clamping parts are both covered with a thermal insulation layer; the insulation layer is 8 cm long and 1 mm thick. The insulation layer on the first clamping part completely covers and encloses the gripping groove; the insulation layer on the second clamping part is the same length as the insulation layer on the first clamping part; and the minimum distance between the midpoint of the insulation layer on the second clamping part and the endpoint of the second clamping part is equal to the minimum distance between the midpoint of the insulation layer on the first clamping part and the endpoint of the first clamping part.
[0027] The second clamping portion has two bosses on one end, which are equipped with the rotating shaft. Together, the bosses and the second clamping portion form a concave slot. The first clamping portion has a bump on one end, which forms a convex mounting platform with the first clamping portion. The bump is mounted in the slot, and the rotating shaft passes through the bosses and the bumps, securing the first clamping portion to the second clamping portion. A cap is provided at each end of the rotating shaft. The distance between the bump and the two bosses is 3-5 mm.
[0028] During use, the fastening ring is removed from the fastening notch, the first and second clamping parts are opened, the crucible to be clamped is placed in the clamping ring, the first and second clamping parts are closed, and the fastening ring is then buckled onto the fastening notch. The experimenter grasps the hand-held grooves with both hands, places the thumbs in the thumb grooves, and shakes the clamping device of this embodiment according to the test conditions to achieve shaking of the crucible. After digestion is completed, the fastening ring is removed from the fastening notch, the first and second clamping parts are opened, and the crucible is placed down. Example 2
[0029] The minimum distance between the midpoint of the thumb groove and the endpoint of the second clamping portion is 13 cm, and the minimum distance between the endpoint of the grip groove near the clamping ring and the endpoint of the second clamping portion is 14 cm. The length of the thermal insulation layer is 12 cm. The thickness of the thermal insulation layer is 3 mm. The distance between the protrusion and the two bosses is 5 mm. Other configurations are the same as in Example 1. Example 3
[0030] The minimum distance between the midpoint of the thumb groove and the end point of the second clamping part is 11 cm, and the minimum distance between the end point of the hand-holding groove close to the clamping ring and the end point of the second clamping part is 12 cm.
[0031] The length of the heat insulation layer is 10 cm and the thickness of the heat insulation layer is 2 mm.
[0032] The distance between the projection and the two bosses is 4 mm.
Claims
1. A crucible clamping device for soil digestion, consisting of a first clamping part and a second clamping part, characterized in that: One end of the first clamping part is rotatably arranged on one end of the second clamping part through a rotating shaft, and a fastening notch is provided at the other end of the first clamping part; a fastening buckle is rotatably provided on the end of the second clamping part corresponding to the fastening notch; the middle parts of the first clamping part and the second clamping part are both bent to form a semicircular clamping ring, and the clamping ring is provided with anti-slip grooves; a wavy hand-holding groove is also provided at each end of the first clamping part, and two thumb grooves are also provided on the second clamping part, and the two thumb grooves are respectively provided on both sides of the clamping ring.
2. A crucible clamping device for soil digestion according to claim 1, characterized in that: The minimum distance between the midpoint of the thumb groove and the end point of the second clamping part is 9-13 cm, and the minimum distance between the end point of the hand-holding groove close to the clamping ring and the end point of the second clamping part is 10-14 cm.
3. The crucible clamping device for soil digestion according to claim 1, characterized in that: The first clamping part and the second clamping part are both provided with a heat insulation layer; the length of the heat insulation layer is 8-12 cm.
4. The crucible clamping device for soil digestion according to claim 3, characterized in that: The thermal insulation layer provided on the first clamping part completely covers and wraps the hand-holding groove; the thermal insulation layer provided on the second clamping part has the same length as the thermal insulation layer provided on the first clamping part; the minimum distance between the midpoint of the thermal insulation layer provided on the second clamping part and the end point of the second clamping part = the minimum distance between the midpoint of the thermal insulation layer provided on the first clamping part and the end point of the first clamping part.
5. The crucible clamping device for soil digestion according to claim 1, characterized in that: The second clamping part is provided with two bosses on one end of the rotating shaft, and the two bosses and the second clamping part together form a "concave" type slot; the first clamping part is provided with a convex block on one end of the rotating shaft, and the convex block and the first clamping part form a "convex" type mounting platform; the convex block is set in the slot, and the rotating shaft passes through the convex block and the convex block to set the first clamping part on the second clamping part.
6. A crucible clamping device for soil digestion according to claim 1 or 5, characterized in that: A cover cap is respectively provided at both ends of the rotating shaft.
7. A crucible clamping device for soil digestion according to claim 3 or 4, characterized in that: The thickness of the heat insulation layer is 1-3 mm.
8. The crucible clamping device for soil digestion according to claim 1, characterized in that: The distance between the bump and the two bosses is 3-5 mm.