A sampling device for testing crystal rod samples
By designing a sampling device for testing crystal rod samples, a near-square sample is formed by pressing the crystal rod sample with first and second sampling pins, which solves the problem of sample position displacement, improves the accuracy of testing, and reduces the risk of metal contamination.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 四川永祥光伏科技有限公司
- Filing Date
- 2025-07-03
- Publication Date
- 2026-06-30
AI Technical Summary
The lack of a direct and effective sampling device for crystal rods in the existing technology leads to the inability to accurately fix the sample position, resulting in sampling position deviation and affecting the accuracy of carbon and oxygen content detection values.
A sampling device for testing crystal rod samples was designed, including a base, a sampling container, a support, a movable column, a pressing head, and a driving mechanism. The device uses first and second sampling pins to press different points on the crystal rod sample to form an approximately square sample, thus avoiding uncontrollable cracks caused by simultaneous contact.
This method enables accurate positioning and fixation of the sample, ensuring the accuracy of carbon and oxygen content detection and reducing the risk of metal contamination introduced by manual operation.
Smart Images
Figure CN224435816U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic monocrystalline silicon technology, and in particular to a sampling device for testing crystal rod samples. Background Technology
[0002] In the field of photovoltaic-grade monocrystalline silicon, monocrystalline silicon rods are raw materials for manufacturing chips and other products. The carbon (C) and oxygen (O) content of monocrystalline silicon rods (referred to as rods) are key impurity indicators affecting cell efficiency and long-term stability. Carbon is the nucleation center for oxygen precipitation, and high-temperature processes (such as PERC cell annealing) can induce oxygen evolution, forming defects (such as clusters), leading to a decrease in minority carrier lifetime. Therefore, oxygen content testing is necessary on samples cut from rods. Because the edges of rods dissipate heat quickly and have a high degree of supercooling, the oxygen atom diffusion rate is low, making it difficult for oxygen atoms to migrate to the edges. Thus, the oxygen content of the sample gradually decreases from the center to the edge.
[0003] In the process of detecting the carbon and oxygen content of samples, the tapping sampling step must be handled with care to avoid introducing metal contamination, or causing data deviation due to sample displacement or inconsistent sampling position. Currently, there is no directly effective tooling for tapping samples; it is basically done manually by hand. The sample position cannot be accurately fixed, and the sampling point is easily offset, affecting the final carbon and oxygen content detection value. The main objective of this application is to develop and design a crystal rod sample sampling device to help standardize operations and achieve accurate and convenient sampling. Utility Model Content
[0004] In view of the above situation, this utility model provides a sampling device for testing crystal rod samples, which aims to solve the technical problem that there is currently no direct and effective tooling for tapping samples, and the samples are basically tapped manually by hand. The sample position cannot be accurately fixed, and the sampling position of the sample is easily offset, which affects the final carbon and oxygen content detection value.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] This utility model provides a sampling device for testing crystal rod samples, comprising:
[0007] The base has independent sampling and installation areas;
[0008] A sampling container, disposed in the sampling area, is used to place crystal rod samples;
[0009] A bracket is installed in the installation area, with one end of the bracket extending above the sampling area;
[0010] The movable column is vertically slidably connected to the bracket and is located above the sampling area;
[0011] An extrusion head is connected to the lower end of the movable column;
[0012] A drive mechanism is used to move the movable column downwards, and the movable column can move upwards to reset after moving downwards;
[0013] The bottom of the extrusion head is provided with a first sampling nail and a second sampling nail, wherein the length of the first sampling nail is greater than the length of the second sampling nail.
[0014] In some embodiments of this utility model, an outer sleeve is connected to the bracket, and the outer wall of the movable column slides in conjunction with the inner wall of the outer sleeve.
[0015] In some embodiments of this utility model, the first sampling nail and / or the second sampling nail are conical.
[0016] In some embodiments of this utility model, the sampling container is made of PPE material.
[0017] In some embodiments of this utility model, the sampling container includes a bottom plate and three side plates; the three side plates are located on the same side of the bottom plate and are connected in sequence, so that the sampling container has a box-shaped structure with openings on both sides, one of which faces the extrusion head.
[0018] In some embodiments of this utility model, a gasket is detachably provided inside the sampling container.
[0019] In some embodiments of this invention, the gasket is circular.
[0020] In some embodiments of this utility model, the gasket is made of PVC material; the side of the gasket can abut against the inner side of the three side plates.
[0021] In some embodiments of this utility model, the driving mechanism includes:
[0022] The handle is rotatably connected to the bracket at one end;
[0023] At least one tension spring is used to move the movable column upwards and reset it.
[0024] In some embodiments of this utility model, the driving mechanism further includes a pressing wheel, which is rotatably connected to the pressure handle and can contact the upper end of the movable column.
[0025] The embodiments of this utility model have at least the following advantages or beneficial effects:
[0026] In use, a shim is placed in the sampling container, and the crystal rod sample is placed on the shim. Then, the movable column is moved downwards by the drive mechanism, causing the first sampling pin on the extrusion head to contact the crystal rod sample first, compressing a point on the sample to create a crack. Subsequently, the second sampling pin contacts the sample, compressing another point on the sample. Since the positions of the first and second sampling pins can be considered as being at opposite corners of a virtual positive / negative rectangle, an approximately positive / negative rectangular sample can be obtained from the central area of the crystal rod sample. The reason for the sequential contact of the first and second sampling pins is that if they contact simultaneously, the crystal rod sample would be subjected to complex forces, easily generating uncontrollable cracks and making it difficult to obtain the desired sample shape.
[0027] Other features and advantages of this invention will be set forth in the following description. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram of a sampling device used for testing crystal rod samples.
[0030] Figure 2 This is a schematic diagram of the extrusion head, the first sampling pin, and the second sampling pin.
[0031] icon:
[0032] 1-Base, 11-Sampling area, 12-Installation area
[0033] 2-Sampling container, 21-Bottom plate, 22-Side plate
[0034] 3-Gasket,
[0035] 4-Bracket, 41-Support, 42-Connecting plate
[0036] 5-Active column,
[0037] 6-Extrusion head, 61-First sampling pin, 62-Second sampling pin
[0038] 7-Outerwear Cuff,
[0039] 81-Pressure handle, 82-Extrusion roller,
[0040] 9-Fixing bolt. Detailed Implementation
[0041] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention.
[0042] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "left", "right", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.
[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0044] "Several" means one or more, unless otherwise explicitly specified.
[0045] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.
[0046] The embodiments of this utility model will be described in detail below.
[0047] Example 1
[0048] See Figures 1-2 This embodiment provides a sampling device for testing crystal rod samples, including a base 1, a sampling container 2, a gasket 3, a bracket 4, a movable column 5, a pressing head 6, and a driving mechanism.
[0049] The base 1 has an independent sampling area 11 and an installation area 12.
[0050] Sampling container 2 is placed on sampling area 11.
[0051] The gasket 3 is detachably installed inside the sampling container 2; the gasket 3 is used to hold the crystal rod sample. Preferably, the size of the gasket 3 is the same as the size of the crystal rod sample.
[0052] The bracket 4 is installed in the installation area 12, and one end of the bracket 4 extends above the sampling area 11.
[0053] The movable column 5 is vertically slidably connected to the bracket 4 and is located above the sampling area 11.
[0054] The extrusion head 6 is connected to the lower end of the movable column 5. The bottom of the extrusion head 6 has a first sampling pin 61 and a second sampling pin 62. The length of the first sampling pin 61 is greater than the length of the second sampling pin 62. The first sampling pin 61 and / or the second sampling pin 62 are conical and made of wear-resistant diamond material.
[0055] The drive mechanism is used to move the movable column 5 downward, and the movable column 5 can move upward to reset after it moves downward.
[0056] In use, the pad 3 is placed in the sampling container 2, and the crystal rod sample is placed on the pad 3. Then, the movable column 5 is moved downward by the drive mechanism, so that the first sampling nail 61 on the extrusion head 6 first contacts the crystal rod sample, extruding a crack at one point on the crystal rod sample. Then, the second sampling nail 62 contacts the crystal rod sample, extruding and sampling at another point on the crystal rod sample (in this embodiment, the sampling points are mainly concentrated in the central area of the crystal rod sample). Since the positions of the first sampling nail 61 and the second sampling nail 62 can be regarded as being at opposite corners of a virtual positive and negative shape / rectangle, an approximately positive and negative shape / rectangle sample can be obtained from the central area of the crystal rod sample. The reason why the first sampling nail 61 and the second sampling nail 62 contact the crystal rod sample one after the other is that if they contact simultaneously, the crystal rod sample will be subjected to complex forces, which will easily produce uncontrollable cracks and make it difficult to obtain the expected sample shape (approximately positive and negative shape / rectangle).
[0057] The sampling device for testing crystal rod samples also includes an outer sleeve 7, the outer wall of which is welded to the support 4; the outer wall of the movable column 5 is slidably fitted with the inner wall of the outer sleeve 7 to better guide the up and down movement of the movable column 5 and the extrusion head 6.
[0058] The drive mechanism includes a pressure handle 81, a pressure wheel 82, a tension spring, and a handle.
[0059] One end of the pressure handle 81 is bent downwards and rotatably connected to the bracket 4, while the other end is narrowed. Specifically, the bracket 4 has a support 41, and one end of the pressure handle 81 is bent downwards and rotatably connected to the support 41.
[0060] The extrusion roller 82 is rotatably connected to the pressure handle 81 and is located below the center of the pressure handle 81; the extrusion roller 82 can contact the upper end of the movable column 5.
[0061] One end of the tension spring (not shown in the figure) is connected to the bracket 4 / outer sleeve 7, and the other end is connected to the lower end of the movable column 5 / side of the extrusion head 6; there can be multiple tension springs. Specifically, a fixing bolt 9 is installed on the bracket 4 / outer sleeve 7, and a fixing bolt 9 is also installed on the lower end of the movable column 5 / extrusion head 6, and the two ends of the tension spring are respectively hung on the corresponding fixing bolt 9.
[0062] The handle (not shown in the figure) is connected to the narrow end of the pressure handle 81, which serves to extend the lever arm and facilitate squeezing for sampling.
[0063] The working principle of the drive mechanism is as follows: the operator presses down the handle 81 or the gripper with his hand, which pushes the movable column 5 and the extrusion head 6 downward through the extrusion wheel 82, causing the movable column 5 to move downward. At this time, the tension spring is in a stretched state. After releasing the hand, the handle 81, the gripper, the movable column 5 and the extrusion head 6 move upward and reset under the action of the tension spring's reset force.
[0064] It should be noted that the above-mentioned drive mechanism uses manual power to drive the movable column 5 and the extrusion head 6, which helps to reduce equipment costs; in other embodiments, electric, pneumatic, hydraulic or other power sources can also be used to drive the movable column 5 and the extrusion head 6.
[0065] The following section will provide supplementary explanations for some of the aforementioned components.
[0066] The base 1 is rectangular (480mm × 320mm × 8mm) and made of stainless steel. The sampling area 11 is located on the right side of the base 1, and the mounting area 12 is located on the left side of the base 1. The mounting area 12 has several holes with diameters of 10mm and 15mm to facilitate the connection of the bracket 4 with hex bolts.
[0067] The sampling container 2 is made of PPE material. The sampling container 2 includes a base plate 21 and three side plates 22. The base plate 21 is square (320mm × 320mm × 5mm). The height of the three side plates 22 is 20mm. The three side plates 22 are located on the same side of the base plate 21 and are connected in sequence, so that the sampling container 2 has a box-shaped structure with two openings. One opening faces the extrusion head 6, and the other opening facilitates the placement and removal of crystal rod samples.
[0068] The gasket 3 is circular (310mm in diameter and 5mm thick) and made of PVC. Its main function is to act as a protective pad during sample compression sampling, protecting the sample from metal contamination. The side of the gasket 3 can abut against the inner side of the three side plates 22 to provide a certain positioning function for the gasket 3.
[0069] Understandably, gasket 3 may not be necessary in scenarios where metal contamination will not be introduced.
[0070] The bracket 4 is arc-shaped and made of stainless steel. A connecting plate 42 is welded to the bottom of the bracket 4. The connecting plate 42 is fastened to the mounting area 12 of the base 1 by internal hex bolts.
[0071] The outer sleeve 7 is a circular sleeve (inner diameter 35mm, length 150mm, wall thickness 5mm) made of stainless steel.
[0072] The movable column 5 is a round stainless steel column (280mm long and 30mm in diameter), and the lower end of the movable column 5 has a 20mm high threaded thread (1.5mm deep).
[0073] The extrusion head 6 is a circular stainless steel cylinder (37mm in diameter and 30mm in length). The upper end of the extrusion head 6 has a screw hole that matches the thread, so that the extrusion head 6 can be threaded to the lower end of the movable column 5.
[0074] The extrusion roller 82 is made of round, hollow, rigid plastic material (35mm in diameter).
[0075] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A sampling device for detecting crystal rod samples, characterized in that, include: The base has independent sampling and installation areas; A sampling container, disposed in the sampling area, is used to place crystal rod samples; A bracket is installed in the installation area, with one end of the bracket extending above the sampling area; The movable column is vertically slidably connected to the bracket and is located above the sampling area; An extrusion head is connected to the lower end of the movable column; A drive mechanism is used to move the movable column downwards, and the movable column can move upwards to reset after moving downwards; The bottom of the extrusion head is provided with a first sampling nail and a second sampling nail, wherein the length of the first sampling nail is greater than the length of the second sampling nail.
2. The sampling device for detecting crystal rod samples according to claim 1, characterized in that, An outer sleeve is connected to the bracket, and the outer wall of the movable column slides in conjunction with the inner wall of the outer sleeve.
3. The sampling device for detecting crystal rod samples according to claim 1, characterized in that, The first sampling pin and / or the second sampling pin are conical.
4. The sampling device for detecting crystal rod samples according to claim 1, characterized in that, The sampling container is made of PPE material.
5. The sampling device for detecting crystal rod samples according to claim 1, characterized in that, The sampling container includes a base plate and three side plates; the three side plates are located on the same side of the base plate and are connected in sequence, so that the sampling container has a box-shaped structure with openings on two sides, one of which faces the extrusion head.
6. The sampling device for detecting crystal rod samples according to claim 5, characterized in that, The sampling container is equipped with a detachable gasket.
7. The sampling device for detecting crystal rod samples according to claim 6, characterized in that, The gasket is circular.
8. The sampling device for detecting crystal rod samples according to claim 7, characterized in that, The gasket is made of PVC material; the side of the gasket can abut against the inner side of the three side plates.
9. The sampling device for detecting crystal rod samples according to any one of claims 1 to 8, characterized in that, The drive mechanism includes: The handle is rotatably connected to the bracket at one end; At least one tension spring is used to move the movable column upwards and reset it.
10. The sampling device for detecting crystal rod samples according to claim 9, characterized in that, The drive mechanism also includes a pressing wheel, which is rotatably connected to the pressure handle and can contact the upper end of the movable column.