Clamping device for detecting sample

Abstract

The utility model relates to the technical field of clamping, in particular to a clamping device for detecting a sample, which comprises a base and a clamping mechanism, a rectangular groove is arranged in the middle of the base, and test paper for detecting the sample is placed in the rectangular groove; the clamping mechanism comprises a clamping cover plate and a positioning block, four inserting grooves are formed in the top of the base and located in the outer side of the side length of the rectangular groove, and the positioning block is arranged at the bottom of the clamping cover plate and matched with the inserting grooves. Clamping blocks are telescopically arranged on the side walls of the positioning blocks, clamping grooves are formed in the side walls of the inserting grooves, and the clamping blocks are clamped and matched with the clamping grooves; a pressing block is arranged at the bottom of the clamping cover plate and is used for pressing corners of the test paper of the detection sample. According to the utility model, the displacement of the test paper sample in the observation process of the electron microscope due to vibration and the like can be effectively prevented, and the accuracy of the observation result is ensured.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, specifically a clamping device for testing samples. Background Technology

[0002] In the field of chemical raw material quality testing, the accurate determination of the metal particulate matter content in chemical raw materials such as ethyl acetate and methyl acetate is crucial. The content of these metal particulate matter not only affects the purity and quality of chemical raw materials, but may also have a significant impact on subsequent production processes using these raw materials. For example, in some precision chemical synthesis reactions, excessive metal particulate matter may act as impurities to catalyze side reactions, reducing product quality and yield.

[0003] Currently, the common detection method involves filtering chemical raw materials with test strips to trap metal particles on the strips. The test strips are then observed using an electron microscope. By analyzing the quantity, size, and other characteristics of the metal particles on the strips, the content of metal particles in the chemical raw materials can be calculated, thereby determining whether they meet quality standards.

[0004] Traditional methods of mounting test strips are relatively simple, commonly using simple clips or tape to fix the strips to the stage. Some laboratories use universal clips made of plastic or metal to secure the strips by clamping their edges. Others simply use tape to stick the strips to the stage.

[0005] When using clips or tape to secure the test strips, the clips may come loose due to vibration or improper handling, and the tape's adhesiveness may decrease after contact with chemical raw materials. This can cause the test strips to shift easily during electron microscope observation, and it is difficult to ensure that the edges and corners of the test strips are evenly and effectively pressed. This may result in wrinkles or unevenness of the test strips on the stage, affecting the clear imaging and accurate analysis of metallic particles on the test strips by the electron microscope. Utility Model Content

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a clamping device for testing samples, which solves the problem of test strips shifting or wrinkling during testing.

[0007] To achieve the above objectives, according to an embodiment of the first aspect of this utility model, a clamping device for testing samples is provided, comprising a base and a clamping mechanism. A rectangular groove is formed in the center of the base, and a test sample strip is placed within the rectangular groove. The clamping mechanism includes a clamping cover plate and positioning blocks. Four slots are formed on the top of the base, located outside the sides of the rectangular groove. The positioning blocks are provided at the bottom of the clamping cover plate, and the positioning blocks are adapted to the slots. A locking block is telescopically provided on the side wall of the positioning block, and a locking groove is provided on the side wall of the slot, with the locking block engaging with the locking groove. A pressing block is provided at the bottom of the clamping cover plate, pressing down on the corners of the test sample strip.

[0008] As a further embodiment of this utility model: the side wall of the positioning block is provided with a telescopic groove, a spring is provided in the telescopic groove, the locking block is provided in the telescopic groove, and the side of the locking block near the telescopic groove is connected to the spring.

[0009] As a further embodiment of this utility model: the test sample strip has a circular test end in the middle, and the clamping cover plate has a circular through hole in the middle.

[0010] As a further embodiment of this utility model: the diameter of the circular through hole is larger than that of the circular detection end.

[0011] As a further embodiment of this utility model: the outer wall of the base is provided with an unlocking mechanism, the unlocking mechanism includes a limit cover, an unlocking plate and a pressing plate, the slot is connected to the outside, the limit cover is fixedly installed on the outer wall of the base, one end of the unlocking plate is installed in the slot and abuts against the side wall of the card block, and the other end is provided with a connecting rod, the connecting rod passes through the limit cover and connects to the pressing plate.

[0012] As a further embodiment of this utility model, an arc surface is provided on one side of the bottom of the card block.

[0013] As a further embodiment of this invention, the clamping block is made of an elastic material.

[0014] As a further embodiment of this utility model, the size of the clamping cover plate is adapted to the base.

[0015] As a further embodiment of this invention, an elastic pad is provided at the bottom of the slot.

[0016] As a further embodiment of this utility model: the clamping block is inserted along the corner of the rectangular groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model, through the cooperation of the positioning block and the slot, and the snap-fit ​​of the card block and the card slot, can firmly fix the clamping cover plate on the base. Combined with the pressing block pressing the corners of the test paper, it can effectively prevent the test paper of the test sample from shifting due to vibration or other reasons during the observation of the electron microscope, thus ensuring the accuracy of the observation results. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a clamping device for detecting samples.

[0020] Figure 2 This is a schematic diagram of the clamping cover installation.

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure for mounting the cover plate.

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the base.

[0023] The attached diagram shows the following labels: 1. Base; 11. Rectangular groove; 12. Slot; 13. Card slot; 2. Test sample strip; 21. Circular test end; 3. Clamping cover; 31. Positioning block; 32. Card block; 33. Pressing block; 34. Circular through hole; 4. Telescopic groove; 41. Spring; 5. Limit cover; 51. Unlocking plate; 52. Connecting rod; 53. Pressing plate. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] like Figures 1 to 4 As shown, a sample clamping device includes a base 1 and a clamping mechanism. The base 1 has a rectangular groove 11 in the middle, and a test sample strip 2 is placed in the rectangular groove 11. The clamping mechanism includes a clamping cover plate 3 and a positioning block 31. The top of the base 1 has four slots 12, which are located outside the sides of the rectangular groove 11. The bottom of the clamping cover plate 3 is provided with the positioning block 31, which is adapted to the slot 12. The side wall of the positioning block 31 is provided with a locking block 32, and the side wall of the slot 12 is provided with a locking groove 13, which engages with the locking block 32. The bottom of the clamping cover plate 3 is provided with a pressing block 33, which presses the corners of the test sample strip 2.

[0026] By cooperating with the positioning block 31 and the slot 12, and by engaging with the card block 32 and the card slot 13, the clamping cover plate 3 can be firmly fixed on the base 1. Combined with the pressing block 33 pressing the corners of the test paper, it can effectively prevent the test paper 2 of the test sample from shifting due to vibration or other reasons during the observation of the electron microscope, thus ensuring the accuracy of the observation results.

[0027] The positioning block 31 has a telescopic groove 4 on its side wall, and a spring 41 is provided in the telescopic groove 4. The locking block 32 is provided in the telescopic groove 4, and the side of the locking block 32 closest to the telescopic groove 4 is connected to the spring 41.

[0028] When the positioning block 31 is inserted into the slot 12, the side wall of the slot 13 presses against the locking block 32, causing the locking block 32 to move into the telescopic groove 4 and compress the spring 41. When the locking block 32 moves to the position aligned with the slot 13, the elastic force of the spring 41 pushes the locking block 32 out and into the slot 13, thus achieving the locking and fixing of the positioning block 31 and the slot 12. This elastic locking structure makes the connection between the positioning block 31 and the slot 12 more convenient and stable. When the positioning block 31 is inserted, the locking block 32 can automatically retract and pop out without additional operation, improving clamping efficiency; at the same time, the elastic force of the spring 41 can ensure a certain fastening force between the locking block 32 and the slot 13, enhancing the stability of the clamping device.

[0029] The test strip 2 has a circular detection end 21 in the middle, and the clamping cover plate 3 has a circular through hole 34 in the middle; the diameter of the circular through hole 34 is larger than that of the circular detection end 21.

[0030] The circular through-hole 34 in the middle of the clamping cover plate 3 corresponds to the circular detection end 21 in the middle of the test sample strip 2. After clamping, the circular detection end 21 can be exposed through the circular through-hole 34, facilitating observation of the detection end by an electron microscope. This design ensures that the clamping cover plate 3 fixes the test strip without affecting the observation of the key detection area of ​​the test strip by the electron microscope, ensuring that the observation process is not obstructed by the clamping device, thus improving the accuracy and convenience of observation.

[0031] The outer wall of the base 1 is provided with an unlocking mechanism, which includes a limit cover 5, an unlocking plate 51 and a pressing plate 53. The slot 13 is connected to the outside. The limit cover 5 is fixedly installed on the outer wall of the base 1. One end of the unlocking plate 51 is installed in the slot 13 and abuts against the side wall of the block 32. The other end is provided with a connecting rod 52. The connecting rod 52 passes through the limit cover 5 and is connected to the pressing plate 53.

[0032] When it is necessary to remove the clamping cover plate 3, the operator presses the pressing plate 53. The pressing plate 53 drives the unlocking plate 51 to move in the slot 13 through the connecting rod 52. The unlocking plate 51 pushes the locking block 32 into the telescopic groove 4, so that the locking block 32 is disengaged from the slot 13, thereby releasing the locking of the positioning block 31 and the slot 12, making it convenient to remove the clamping cover plate 3.

[0033] The bottom side of the card block 32 is provided with an arc surface. During the process of inserting the positioning block 31 into the slot 12, the side wall of the slot 12 first contacts the arc surface at the bottom of the card block 32. As the positioning block 31 is inserted, the arc surface guides the card block 32 to gradually retract into the telescopic groove 4, reducing the friction between the card block 32 and the side wall of the slot 12.

[0034] The clamping block 33 is made of elastic material; when the clamping block 33 of elastic material comes into contact with the corner of the test sample paper 2, it will deform to a certain extent due to its own elasticity, thereby better fitting the corner of the test paper and providing uniform pressure.

[0035] The size of the clamping cover plate 3 is adapted to the size of the base 1. The adaptation of the size of the clamping cover plate 3 to the base 1 allows the clamping cover plate 3 to accurately cover the base 1, and the positional relationship between the positioning block 31 and the slot 12, the pressing block 33 and the edge of the test paper and other components is accurately corresponded, ensuring the normal operation of the clamping device.

[0036] An elastic pad is provided at the bottom of the slot 12. When the positioning block 31 is inserted into the slot 12, the bottom of the positioning block 31 will contact the elastic pad. The elastic pad will undergo elastic deformation when subjected to pressure, providing a certain buffer for the positioning block 31. At the same time, it provides an upward thrust when the clamping cover plate 3 is removed, making it easy to remove.

[0037] The clamping block 33 is inserted along the corner of the rectangular groove 11 to effectively fix the corner of the test paper, prevent the test paper from shifting or wrinkling in the rectangular groove 11, and ensure that the test paper is in a flat state during observation, which is beneficial to improving the accuracy of electron microscope observation.

[0038] The working principle of this utility model is as follows: The clamping device for testing samples is mainly used to fix the test sample paper 2 so that the chemical raw materials such as ethyl acetate or methyl acetate containing metal particles after being filtered by the test paper can be observed under an electron microscope to calculate whether the content of metal particles is qualified.

[0039] During operation, the filtered chemical raw material test sample strip 2 is first placed in the rectangular groove 11 in the middle of the base 1. Then, the positioning block 31 on the clamping cover plate 3 is aligned with the slot 12 at the top of the base 1 and inserted. The locking block 32, which is telescopically set on the side wall of the positioning block 31, will compress the spring 41 and retract inward under the action of the locking groove 13 on the side wall of the slot 12. When the locking block 32 is aligned with the locking groove 13, the spring 41 rebounds, causing the locking block 32 to lock into the locking groove 13, thus achieving a fixed connection between the clamping cover plate 3 and the base 1. At this time, the clamping block 33 at the bottom of the clamping cover plate 3 will press the edges and corners of the test sample strip 2 to ensure that the test strip will not move during observation.

[0040] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.

Claims

1. A clamping device for detecting samples, comprising a base (1) and a clamping mechanism, a rectangular slot (11) is formed in the middle of the base (1), and a detection sample test paper (2) is placed in the rectangular slot (11); characterized in that The clamping mechanism comprises a clamping cover plate (3) and a positioning block (31), four insertion grooves (12) are formed in the top of the base (1), the insertion grooves (12) are located outside the length of the rectangular slot (11), the positioning block (31) is arranged at the bottom of the clamping cover plate (3), and the positioning block (31) is matched with the insertion grooves (12); a clamping block (32) is arranged on the side wall of the positioning block (31) in an extending and retracting mode, a clamping groove (13) is arranged on the side wall of the insertion groove (12), and the clamping block (32) is matched with the clamping groove (13); a pressing block (33) is arranged at the bottom of the clamping cover plate (3), and the pressing block (33) presses the corners of the detection sample test paper (2).

2. The clamping device for detecting a sample according to claim 1, wherein A retractable slot (4) is formed in the side wall of the positioning block (31), a spring (41) is arranged in the retractable slot (4), the clamping block (32) is arranged in the retractable slot (4), and one side of the clamping block (32) close to the retractable slot (4) is connected with the spring (41).

3. The clamping device for detecting a sample according to claim 1, wherein A circular detection end (21) is arranged in the middle of the detection sample test paper (2), and a circular through hole (34) is formed in the middle of the clamping cover plate (3).

4. The clamping device for detecting a sample according to claim 3, wherein The diameter of the circular through hole (34) is larger than that of the circular detection end (21).

5. The clamping device for detecting a sample according to claim 1, wherein An unlocking mechanism is arranged on the outer side wall of the base (1), the unlocking mechanism comprises a limiting cover (5), an unlocking plate (51) and a pressing plate (53), the clamping groove (13) is communicated with the outside, the limiting cover (5) is fixedly arranged on the outer side wall of the base (1), one end of the unlocking plate (51) is arranged in the clamping groove (13) and abuts against the side wall of the clamping block (32), the other end of the unlocking plate (51) is provided with a connecting rod (52), and the connecting rod (52) penetrates through the limiting cover (5) and is connected with the pressing plate (53).

6. The clamping device for detecting a sample according to claim 5, wherein An arc surface is arranged on one side of the bottom of the clamping block (32).

7. The clamping device for detecting a sample according to claim 1, wherein The pressing block (33) is made of an elastic material.

8. The clamping device for detecting a sample according to claim 1, wherein The size of the clamping cover plate (3) is matched with that of the base (1).

9. The clamping device for detecting a sample according to claim 1, wherein An elastic pad is arranged at the bottom of the insertion groove (12).

10. The clamping device for detecting a sample according to claim 1, wherein The pressing block (33) is inserted along the corners of the rectangular slot (11).

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