Automatic sample adding device for trifluoroacetic acid liquid taking

Abstract

The utility model relates to the technical field of sample transferring and adding, in particular to a trifluoroacetic acid liquid taking and automatic sample adding device which comprises an operation base station, a raw material container is installed in the center of the top end of the operation base station, and a rubber plug body is fixedly installed above the raw material container. The rubber plug comprises a rubber plug body, a sliding block, a grip, an inner ring plate, a lower guide column and a magnetic strip, four combined blocking covers are arranged at the four corner ends of the outer portion of the rubber plug body respectively, and an upper guide column is fixedly connected to the top of each combined blocking cover. The combined blocking covers, the upper guide columns, the sliding blocks, the grip, the inner ring plate, the lower guide columns and the magnetic strip are arranged; after the trifluoroacetic acid liquid taking and automatic sample adding device completes transferring and sample adding operation, under the connecting and limiting effects of the supporting frame and the guide groove, the four blocking cover structures are combined and spliced, shielding protection is provided from the position over the rubber plug body, and the situation that when the device is not used, the rubber plug body is blocked is avoided. Dirt such as dust is easy to adhere to the surface of the rubber plug body.

Description

Technical Field

[0001] The utility model relates to the technical field of sample transfer and addition, in particular to an automatic sample addition device for trifluoroacetic acid liquid extraction. Background Art

[0002] In chemical production and processing, trifluoroacetic acid is a colorless, volatile, fuming liquid with strong irritation and hygroscopicity. Its acidity is 100,000 times stronger than acetic acid. It is soluble in water, ethanol, ether, etc., making it a good solvent for many organic compounds. At the same time, in actual experimental processing of trifluoroacetic acid, it is usually necessary to perform operations such as liquid sample transfer and sample addition on trifluoroacetic acid.

[0003] When an automatic liquid sampling device is usually used, the prior art generally mainly uses the cooperation of a vacuum rubber stopper and a pipette to transfer and sample trifluoroacetic acid. However, during the process of inserting the needle at the bottom of the pipette into the vacuum rubber stopper, if dust and other dirt remain on the surface of the vacuum rubber stopper, there is a risk that such dirt will be easily brought into the container with the pipette needle, and it is also easy to cause relative contamination of the original liquid inside the container. Therefore, to address the above problems, an automatic liquid sampling device for trifluoroacetic acid is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic sampling device for trifluoroacetic acid liquid collection, so as to solve the problem in the prior art proposed in the above background technology that the surface of the vacuum rubber stopper is easily contaminated by dust and dirt when the automatic sampling device is not used.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A trifluoroacetic acid liquid automatic sampling device comprises an operating base, a raw material container is mounted at the top center of the operating base, a rubber stopper body is fixedly mounted above the raw material container, four combination shields are respectively provided at the four outer corners of the rubber stopper body, an upper guide column is fixedly connected to the top of the combination shield, a slider is fixedly connected to the top of the upper guide column, a handle is fixedly mounted on the outside of the upper guide column, an inner ring plate is fixedly connected to the lower inner side of the combination shield, a lower guide column extending downward through the inner ring plate is fixedly connected above the inner ring plate, and two adjacent combination shields are magnetically connected by a magnetic strip.

[0007] Preferably, the movable end of the telescopic cylinder provided inside the operating base is fixedly connected to the bottom end of the raw material container, and the top surface of the operating base is integrally formed with a guide groove, which is provided directly below the combined baffle.

[0008] Preferably, the slider has a spherical structure, and a support frame is slidably connected to the upper position of the slider. The two support frames are fixedly connected together through a center sleeve. The support frame has a "V"-shaped structure, and the front and rear ends of the support frame are respectively connected with columns that pass through the support frame, and the columns and the operating base are fixedly connected together.

[0009] Preferably, the internal thread of the central sleeve is connected to a threaded clamp joint, the top position of the threaded clamp joint is connected to the pipette body, the bottom position of the threaded clamp joint is connected to the needle body, the outer shape of the needle body is set in a conical structure, and the liquid outlet of the needle body is set opposite to the rubber stopper body.

[0010] Preferably, the magnetic strips are grouped into four groups of two, and the two magnetic strips in a single group are arranged in a longitudinal and a transverse structure respectively. The combined shield is a fan-shaped structure surrounding the outside of the rubber plug body. The diameter of the upper guide column is larger than the diameter of the lower guide column, and the lower end of the lower guide column extends to the inside of the guide groove and is slidably connected to the operating base.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] In the utility model, the combined shield, upper guide post, slider, handle, inner ring plate, lower guide post and magnetic strip are provided, which facilitates the automatic sampling device for trifluoroacetic acid liquid extraction to be able to complete the transfer and sampling operation. Under the connection and limitation of the support frame and the guide groove, the combined splicing of four shield structures composed of the combined shield, upper guide post, slider, handle, inner ring plate, lower guide post and magnetic strip is used to provide shielding protection from the position directly above the rubber stopper body, so as to prevent dust and other dirt from easily adhering to the surface of the rubber stopper body when the device is not in use, and at the same time reduce the risk of dirt accidentally entering the container, thereby reducing the relative contamination of the original liquid inside the container by dirt. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the splicing structure of the combined shield of the utility model;

[0015] Figure 3 This is a schematic diagram of the magnetic strip arrangement and installation structure of the utility model.

[0016] In the figure: 1. operating base; 2. raw material container; 3. rubber stopper body; 4. combined shield; 5. upper guide post; 6. slide block; 7. handle; 8. inner ring plate; 9. lower guide post; 10. magnetic strip; 11. support frame; 12. column; 13. center sleeve; 14. threaded connector; 15. pipette body; 16. needle body; 17. guide groove. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-3 , the utility model provides a technical solution:

[0019] A trifluoroacetic acid liquid automatic sampling device comprises an operating base 1, a raw material container 2 is mounted at the top center of the operating base 1, a rubber stopper body 3 is fixedly mounted above the raw material container 2, four combination shields 4 are respectively provided at the four corner ends of the outer side of the rubber stopper body 3, an upper guide column 5 is fixedly connected to the top of the combination shield 4, a slider 6 is fixedly connected to the top of the upper guide column 5, a handle 7 is fixedly mounted on the outer side of the upper guide column 5, an inner ring plate 8 is fixedly connected to the lower inner side of the combination shield 4, a lower guide column 9 extending downward and penetrating the inner ring plate 8 is fixedly connected above the inner ring plate 8, and two adjacent combination shields 4 are magnetically connected by a magnetic strip 10.

[0020] like Figure 1 As shown, the movable end of the telescopic cylinder provided inside the operating base 1 is fixedly connected to the bottom end of the raw material container 2, and the top surface of the operating base 1 is integrally formed with a guide groove 17, which is arranged just below the combined baffle 4. When the upper guide column 5 moves, the sliding cooperation between it and the guide groove 17 can play a role of relative guiding and limiting; the internal thread of the central sleeve 13 is connected to a threaded clamping joint 14, the top position of the threaded clamping joint 14 is connected to the pipette body 15, and the bottom of the threaded clamping joint 14 is connected to the needle body 16, the outer shape of the needle body 16 is set in a conical structure, and the liquid outlet of the needle body 16 is set opposite to the rubber stopper body 3, and is set relative to each other in the upper and lower positions. The outer shape of the needle body 16 is set in a conical structure, so that it can easily pass through the rubber stopper body 3 and penetrate into the interior of the raw material container 2.

[0021] like Figure 1 、 Figure 2 and Figure 3As shown, the slider 6 has a spherical structure, and a support frame 11 is slidably connected to the upper position of the slider 6. The two support frames 11 are fixedly connected together by a central sleeve 13. The shape of the support frame 11 is a "V"-shaped structure. The front and rear ends of the support frame 11 are respectively connected with columns 12 that pass through the support frame 11. The column 12 and the operating base 1 are fixedly connected together. When the pipette body 15 is installed, the setting of the column 12 and the support frame 11 mainly plays the role of auxiliary support of the central sleeve 13; the magnetic There are four groups of suction strips 10, each consisting of two. The two magnetic strips 10 in a single group are arranged in a longitudinal and a transverse structure respectively. The combined shield 4 is a fan-shaped structure surrounding the outside of the rubber stopper body 3. The diameter of the upper guide column 5 is larger than the diameter of the lower guide column 9. The lower end of the lower guide column 9 extends to the inside of the guide groove 17 and is slidably connected to the operating base 1. After the four combined shields 4 of this structure are moved close to the center position of the operating base 1, the splicing of the four combined shields 4 can be limited by the magnetic connection between the multiple groups of magnetic strips 10.

[0022] Working process: Before using the device, the needle body 16 can be passed through the interior of the central sleeve 13 and extended to the lower position of the central sleeve 13. At the same time, the upper guide column 5 can be stably installed on the central sleeve 13 through the threaded connection between the central sleeve 13 and the threaded clamp 14, so that it can be installed overhead. When the trifluoroacetic acid liquid automatic sampling device needs to be used, first hold the handle 7 tightly, and under the connection limit of the slider 6 and the lower guide column 9, respectively move the upper guide column 5, the combined shield 4 and the inner ring plate 8 away from the rubber stopper body 3 to expand and move outward, so that the four combined shields 4 remove the obstruction on the center position of the operating base 1, and then start the telescopic cylinder inside the operating base 1, and gradually move upward with the raw material container 2 and the rubber stopper body 3. When they are at the appropriate height, the needle body 16 will penetrate the rubber stopper body 3 and extend to the raw material container 2. The inside of the container 2 can be opened by opening the pipette body 15 so that the liquid inside can be transferred and added to the inside of the raw material container 2, and the entire trifluoroacetic acid transfer and sampling operation can be completed with the cooperation of the entire device. When the transfer and sampling operation is not needed, as the telescopic cylinder is reset, the raw material container 2 and the rubber stopper body 3 are moved downward and adjusted again, and retracted into the inside of the operating base 1. The handle 7 can be gripped again, and the upper guide column 5, the combined shield 4 and the inner ring plate 8 are respectively moved close to the rubber stopper body 3 for reset. The four combined shields 4 are reset and reassembled together, and the splicing is limited by the magnetic connection between adjacent magnetic strips 10, so that it can form a complete circular cover structure, thereby protecting the rubber stopper body 3 from dust and dirt adhering to its surface, resulting in the risk of contaminating the original liquid inside the container.

[0023] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic sampling device for trifluoroacetic acid liquid, comprising an operating base (1), characterized in that: A raw material container (2) is installed at the center of the top of the operating base (1), a rubber plug body (3) is fixedly installed above the raw material container (2), four combination shields (4) are respectively provided at the four corner ends of the outer side of the rubber plug body (3), an upper guide column (5) is fixedly connected to the top of the combination shield (4), a slider (6) is fixedly connected to the top of the upper guide column (5), a handle (7) is fixedly installed on the outer side of the upper guide column (5), an inner ring plate (8) is fixedly connected to the lower inner side of the combination shield (4), a lower guide column (9) extending downward and penetrating the inner ring plate (8) is fixedly connected above the inner ring plate (8), and two adjacent combination shields (4) are magnetically connected by a magnetic strip (10).

2. A trifluoroacetic acid liquid automatic sampling device according to claim 1, characterized in that: The movable end of the telescopic cylinder provided inside the operating base (1) is fixedly connected to the bottom end of the raw material container (2); the top surface of the operating base (1) is integrally formed with a guide groove (17); the guide groove (17) is provided directly below the combined baffle (4).

3. A trifluoroacetic acid liquid automatic sampling device according to claim 1, characterized in that: The slider (6) has a spherical structure, and a support frame (11) is slidably connected to the upper position of the slider (6). The two support frames (11) are fixedly connected together via a central sleeve (13). The support frames (11) have a "V"-shaped structure, and the front and rear ends of the support frames (11) are respectively connected with columns (12) that pass through the support frames (11), and the columns (12) and the operating base (1) are fixedly connected together.

4. A trifluoroacetic acid liquid automatic sampling device according to claim 3, characterized in that: The inner thread of the central sleeve (13) is connected to a threaded clamping joint (14), the top of the threaded clamping joint (14) is connected to a pipette body (15), and the bottom of the threaded clamping joint (14) is connected to a needle body (16), the outer shape of the needle body (16) is set in a conical structure, and the liquid outlet of the needle body (16) is set to face the rubber stopper body (3).

5. A trifluoroacetic acid liquid automatic sampling device according to claim 1, characterized in that: The magnetic strips (10) are arranged in groups of two, with a total of four groups. The two magnetic strips (10) in a single group are arranged in a longitudinal and a transverse structure respectively. The combined shield (4) is a fan-shaped structure surrounding the outside of the rubber plug body (3). The diameter of the upper guide column (5) is greater than the diameter of the lower guide column (9). The lower end of the lower guide column (9) extends to the inside of the guide groove (17) and is slidably connected to the operating base (1).

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