Batch operation clamp for fire assaying

Abstract

The utility model provides a batch operation clamp for fire assaying, and relates to the field of mineral precious metal analysis and detection. The device comprises a first clamping part far away from a mechanical arm (far end) and a second clamping part close to the mechanical arm (near end), and the opening of a first crucible clamping ring and the opening of a second crucible clamping ring are arranged in a certain taper, so that the fitting degree of the clamping rings and the crucible is improved, it is guaranteed that the crucible does not incline or fall off due to shaking in the transferring process, and the transferring efficiency of the crucible is improved. And the stability of the crucible in the transfer process is improved. The anti-clamping gasket is arranged on the first clamping part, so that the problem that the crucible is easily clamped by the crucible clamping ring at one end far away from the mechanical arm due to expansion of the clamp for fire assaying caused by high temperature is effectively solved. By arranging the positioning device, the purpose of clamping a crucible and a cupel tray by using one fixture is achieved, and the problem that tools need to be frequently replaced in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mineral precious metal analysis and detection, in particular to a batch operation fixture for fire assay. Background Art

[0002] Due to its wide applicability, good enrichment effect, good sampling representativeness, and high accuracy of analysis results, the fire assay method has always been an important means for gold and silver analysis and an important method for gold arbitration. During the operation of the fire assay method, in the prior art, a crucible fork is usually used to transfer crucibles (a kind of container for holding samples in the fire assay method) to the furnace chamber of a high-temperature electric furnace one by one. It is necessary to repeat the operation many times to transfer dozens or even hundreds of crucibles in each batch to the furnace chamber. This not only has low efficiency, but also the personnel will be harmed by high-temperature radiation during long-term operation in front of the furnace, and the contact time with the high-temperature steam of harmful reagents is relatively long.

[0003] In addition, when using a crucible fork to send a crucible into a high-temperature furnace, since the crucible fork expands after being heated, it is easy to clamp the crucible tightly, resulting in the problem that the crucible cannot fall off after being transferred to the furnace chamber. Moreover, during the subsequent "cupellation" operation of the fire assay, tools such as duckbill pliers are needed to clamp and transfer the tray carrying the ash dish (another kind of container for holding samples in the fire assay method) to the furnace chamber of the high-temperature electric furnace. That is, a variety of operation tools are needed throughout the fire assay operation process; in an automated operation scenario, the robotic arm needs to continuously change tools to work, greatly reducing the work efficiency.

[0004] In view of this, it is necessary to design a batch operation fixture for fire assay to solve the above problems. Content of the Utility Model

[0005] Aiming at the defects of the above-mentioned prior art, the purpose of the utility model is to provide a batch operation fixture for fire assay. By setting a plurality of crucible clamping rings and setting the opening of the crucible clamping ring to be tapered, the stability of the batch transfer process of the crucibles is ensured; by setting a positioning device, it is realized that one fixture can be used to complete the stable batch transfer of crucibles and the stable transfer of the ash dish tray, without the need to frequently change tools, thus improving the work efficiency.

[0006] To achieve the above object, the utility model provides a batch operation fixture for fire assay, which comprises a clamping part for clamping a crucible and a connecting part for connecting with a robotic arm; the clamping part comprises a first clamping part and a second clamping part; the first clamping part comprises a first substrate, a stepped surface formed by recessing downward from the upper surface of the first substrate, and a plurality of first crucible clamping rings penetrating through the stepped surface up and down; the second clamping part comprises a second substrate connected to the first substrate and a plurality of second crucible clamping rings penetrating through the second substrate up and down; both the first crucible clamping ring and the second crucible clamping ring are provided with side openings, and the included angle between the tangent line at the opening and the horizontal line ranges from 3.8° to 19.8°; a positioning device for fixing an ash pan tray is arranged on the first substrate and the second substrate.

[0007] Further, a plurality of anti-clamping gaskets are arranged on the stepped surface; an arc-shaped hollow area for the crucible to pass through is arranged on the anti-clamping gasket, the central axis of the hollow area is collinear with the central axis of the first crucible clamping ring, and the radius of the hollow area is smaller than the radius of the first crucible clamping ring.

[0008] Further, the difference between the radius of the hollow area and the radius of the first crucible clamping ring is 0.15 mm - 0.5 mm.

[0009] Further, the positioning device comprises positioning through holes penetrating through the first substrate and the second substrate up and down, and positioning pins connecting the ash pan tray with the first substrate or the second substrate.

[0010] Further, a plurality of first through holes are arranged on the anti-clamping gasket, and a plurality of second through holes are arranged on the stepped surface, and the positions of the first through holes correspond to the positions of the second through holes.

[0011] Further, the material of the anti-clamping gasket is refractory material or other metal materials with a linear expansion coefficient different from that of the first substrate.

[0012] Further, the radius of the mouth of the first crucible clamping ring gradually decreases from top to bottom along the thickness direction of the first substrate; the radius of the mouth of the second crucible clamping ring gradually decreases from top to bottom along the thickness direction of the second substrate.

[0013] Further, the first clamping part and the second clamping part are integrally arranged.

[0014] Further, the first clamping part is arranged away from the connecting part.

[0015] Further, the positioning through holes on the first substrate are arranged on the stepped surface.

[0016] The beneficial effects of the utility model are:

[0017] 1. The batch operation fixture for fire assay provided by the present utility model includes a first clamping portion away from the robotic arm (the distal end) and a second clamping portion close to the robotic arm (the proximal end). By setting the opening of the clamping ring (the first crucible clamping ring and the second crucible clamping ring) to have a certain taper, the fit between the clamping ring and the crucible is improved, ensuring that the crucible will not be skewed or dropped due to shaking during the transfer process, and greatly improving the stability during the crucible transfer process. By setting the positioning device, the purpose of using one fixture to clamp the crucible and the ash pan tray can be achieved, avoiding the problem of frequent tool replacement in the prior art.

[0018] 2. The batch operation fixture for fire assay provided by the present utility model is provided with an anti-clamping gasket on the first clamping portion. The thermal expansion coefficient of the anti-clamping gasket is smaller than that of the first substrate, and the radius of the hollow area on the anti-clamping gasket is slightly smaller than the radius of the second crucible clamping ring. During application, it is mainly the anti-clamping gasket that fits with the crucible, effectively solving the problem that the crucible clamping ring at the end away from the robotic arm is likely to clamp the crucible due to the expansion of the fire assay fixture at high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the batch operation fixture for fire assay provided by the present utility model;

[0020] Figure 2 is Figure 1 a schematic structural diagram of the first clamping portion in without the anti-clamping gasket placed;

[0021] Figure 3 is Figure 1 a schematic structural diagram of the first clamping portion in with the anti-clamping gasket placed;

[0022] Figure 4 is a schematic diagram of the batch operation fixture for fire assay provided by the present utility model when clamping the crucible;

[0023] Figure 5 is a schematic diagram of the batch operation fixture for fire assay provided by the present utility model when clamping the ash pan tray. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail below with reference to the drawings and specific embodiments.

[0025] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted. In addition, it should also be noted that the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] See also Figures 1 to 5 As shown, the utility model provides a batch operation fixture 100 for fire assaying, including a clamping portion for clamping a crucible and a connecting portion 30 for connecting to a robot arm. The clamping portion includes a first clamping portion 10 away from the connecting portion 30 and a second clamping portion 20 connected to the first clamping portion 10. Specifically, the first clamping portion 10 includes a first substrate 11, a step surface 12 formed by being recessed downward from the upper surface of the first substrate 11, and a plurality of first crucible clamping rings 13 that penetrate the step surface 12 from top to bottom. The second clamping portion 20 includes a second substrate 21 connected to the first substrate 11 and a plurality of second crucible clamping rings 22 that penetrate the second substrate 21 from top to bottom. The radius of the opening of the first crucible clamping ring 13 gradually decreases from top to bottom along the thickness direction of the first substrate 11. The radius of the opening of the second crucible clamping ring 22 gradually decreases from top to bottom along the thickness direction of the second substrate to adapt to the outer wall of the crucible.

[0027] The first crucible clamping ring 13 and the second crucible clamping ring 22 are both circular with side openings, and the openings are set with a certain taper. In the present utility model, the angle between the tangent line at the opening and the horizontal line ranges from 3.8° to 19.8°. Those skilled in the art should understand that in actual applications, the angle is set according to the specific crucible to be clamped, and it is sufficient to ensure that the taper at the opening matches the outer wall of the crucible to be clamped.

[0028] With such arrangement, when the crucible 200 is mounted on the crucible clamping ring, the ring opening of the crucible clamping ring fits more closely to the wall surface of the crucible 200 , and the crucible 200 will not tilt or fall due to shaking during the transfer process, thereby greatly improving the stability of the crucible 200 during the transfer process.

[0029] In this embodiment, the first clamping portion 10 and the second clamping portion 20 are integrally provided. The second clamping portion 20 is connected to the connecting portion 30, and the first clamping portion 10 is provided at one end away from the connecting portion 30. Specifically, a plurality of anti-clamping gaskets 40 are provided on the stepped surface 12 of the first clamping portion 10. A plurality of first through holes 41 are provided on the anti-clamping gasket 40, and a plurality of second through holes 121 are provided on the stepped surface 12. The positions of the first through holes 41 correspond to the positions of the second through holes 121 for fixing the anti-clamping gasket 40 on the stepped surface 12 by screws.

[0030] Specifically, an arc-shaped hollowed-out area 42 for the crucible 200 to pass through is provided on the anti-clamping gasket 40. The central axis of the hollowed-out area 42 is collinear with the central axis of the first crucible clamping ring 13, and the radius of the hollowed-out area 42 is slightly smaller than the radius of the ring opening of the first crucible clamping ring 13. Generally, the difference between the radius of the hollowed-out area 42 and the radius of the ring opening of the first crucible clamping ring 13 is 0.15 mm - 0.5 mm. In this embodiment, the difference between the radius of the hollowed-out area 42 and the radius of the ring opening of the first crucible clamping ring 13 is 0.5 mm. That is, during application, mainly the anti-clamping gasket 40 is in contact with the crucible 200.

[0031] Specifically, the material of the anti-clamping gasket 40 is a refractory material or other metal material. Preferably, the thermal expansion coefficient of the anti-clamping gasket 40 is smaller than the thermal expansion coefficient of the first substrate 11.

[0032] Those skilled in the art understand that in the prior art, when the fixture is used in connection with the robotic arm, after the robotic arm places the crucible in the furnace chamber, it will move downward and then move laterally to disengage the fixture from the crucible. Because the fixture is relatively long, during the downward movement in the furnace chamber, the distal end of the fixture is likely to get stuck on the crucible and unable to descend, while the proximal end moves downward under the action of the robotic arm, resulting in the fixture being bent and deformed, causing damage to the fixture or bringing the crucible out of the furnace chamber. The present utility model effectively solves the problem that the crucible clamping ring at the end far from the robotic arm gets stuck on the crucible due to the expansion of the fire assay fixture caused by high temperature by providing the anti-clamping gasket 40 on the first clamping portion 10 at the distal end.

[0033] Please refer to Figure 5 and in combination with Figures 1 to 2 As shown, positioning devices for fixing the ash pan tray 300 are provided on the first substrate 11 and the second substrate 21. Specifically, the positioning device includes positioning through holes 51 penetrating the first substrate 11 (second substrate 21) up and down and positioning pins 52 connecting the ash pan tray 300 to the first substrate 11 or the second substrate 21. In this embodiment, the positioning through holes 51 on the first substrate 11 are provided on the stepped surface 12.

[0034] Correspondingly, through holes for the positioning pins 52 to pass through are provided at both ends of the ash pan tray 300, and the stable connection between the ash pan tray and the fixture is achieved by using the positioning device. With such a setting, the purpose of using one fixture to clamp both the crucible 200 and the ash pan tray 300 is realized, avoiding the problem of frequent tool replacement in the prior art.

[0035] In this embodiment, three first crucible clamping rings 13 are provided on the first clamping portion 10, and five second crucible clamping rings 22 are provided on the second clamping portion 20. Those skilled in the art should understand that the number of clamping rings can be set according to actual application needs and is not limited thereto.

[0036] The working principle of the batch operation fixture 100 for fire assay provided by the present utility model will be described below:

[0037] Please refer to Figures 1 to 5 As shown, the working process is as follows: In an automated fire assay scenario, after the batch operation fixture 100 for fire assay is installed on the robotic arm through the connecting portion 30, if it is necessary to transfer eight crucibles 200 containing samples to the furnace, the eight target crucibles 200 are correspondingly clamped on the first crucible clamping rings 13 and the second crucible clamping rings 22 of the batch operation fixture for fire assay, and then the crucibles 200 containing samples can be stably transferred to the furnace in batches; if it is necessary to transfer the ash pan tray 300 containing samples to the furnace, the ash pan tray 300 is installed on the batch operation fixture 100 for fire assay through the positioning pins 52, and then the samples can be stably transferred to the furnace.

[0038] In summary, the present utility model provides a batch operation fixture 100 for fire assay, which includes a first clamping portion 10 away from the robotic arm (the distal end) and a second clamping portion 20 close to the robotic arm (the proximal end). By setting the openings of the clamping rings (the first crucible clamping rings 13 and the second crucible clamping rings 22) with a certain taper, the fitting degree between the clamping rings and the crucible 200 is improved, ensuring that the crucible 200 will not be skewed or dropped due to shaking during the transfer process, and greatly improving the stability of the crucible 200 during the transfer process; by providing the anti-clamping gasket 40 on the first clamping portion 10, the problem that the crucible clamping ring at the end away from the robotic arm is likely to clamp the crucible due to the expansion of the fire assay fixture caused by high temperature is effectively solved; by setting the positioning device, the purpose of using one fixture to clamp both the crucible 200 and the ash pan tray 300 is realized, avoiding the problem of frequent tool replacement in the prior art.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A batch operation fixture for fire assay, characterized in that, It includes a clamping part for clamping a crucible and a connecting part for connecting with a robotic arm; the clamping part includes a first clamping part and a second clamping part; the first clamping part includes a first substrate, a stepped surface formed by recessing downward from the upper surface of the first substrate, and a plurality of first crucible clamping rings penetrating through the stepped surface vertically; the second clamping part includes a second substrate connected to the first substrate and a plurality of second crucible clamping rings penetrating through the second substrate vertically; both the first crucible clamping ring and the second crucible clamping ring are arranged with side openings, and the included angle between the tangent line at the opening and the horizontal line ranges from 3.8° to 19.8°; a positioning device for fixing an ash tray is arranged on the first substrate and the second substrate.

2. The batch operation fixture for fire assay according to claim 1, characterized in that: A plurality of anti-clamping gaskets are arranged on the stepped surface; an arc-shaped hollow area for the crucible to pass through is arranged on the anti-clamping gasket, the central axis of the hollow area is collinear with the central axis of the first crucible clamping ring, and the radius of the hollow area is smaller than the radius of the first crucible clamping ring.

3. The batch operation fixture for cupellation according to claim 2, characterized in that: The difference between the radius of the hollow area and the radius of the first crucible clamping ring is 0.15 mm - 0.5 mm.

4. The batch operation fixture for fire assay according to claim 1, wherein: The positioning device includes a positioning through hole penetrating through the first substrate and the second substrate vertically and a positioning pin connecting the ash tray with the first substrate or the second substrate.

5. The batch operation fixture for fire assay according to claim 2, characterized in that: A plurality of first through holes are arranged on the anti-clamping gasket, a plurality of second through holes are arranged on the stepped surface, and the positions of the first through holes correspond to the positions of the second through holes.

6. The batch operation fixture for fire assay according to claim 1, characterized in that: The radius of the mouth of the first crucible clamping ring gradually decreases from top to bottom along the thickness direction of the first substrate; the radius of the mouth of the second crucible clamping ring gradually decreases from top to bottom along the thickness direction of the second substrate.

7. The batch operation fixture for fire assay according to claim 1, wherein: The first clamping part and the second clamping part are integrally arranged.

8. The batch operation fixture for fire assay according to claim 7, wherein: The first clamping part is arranged away from the connecting part.

9. The batch operation fixture for fire assay according to claim 4, characterized in that: The positioning through hole on the first substrate is arranged on the stepped surface.

Images