Chromatographic column cutting positioning device

Abstract

The utility model relates to the technical field of chromatographic column experiments, in particular to a chromatographic column cutting and positioning device which comprises a base, a sliding seat is arranged at the top end of the base in a sliding mode, a cutting mechanism is arranged at the top end of the sliding seat, and the cutting mechanism comprises a support fixedly installed at the top end of the sliding seat. A ceramic blade and a cutter handle which are used for cutting are movably arranged on one side of the top of the support, a supporting mechanism is arranged at the position, close to the lower portion of the ceramic blade, of the support and comprises a supporting plate arranged on the side wall of the support in a sliding mode, and a through hole is formed in the position, close to the supporting plate, of the support. According to the utility model, by arranging the cutting mechanism, the chromatographic column is cut according to a fixed cutting angle and a fixed cutting track when being cut, so that the chromatographic column with a flat section can be quickly and simply obtained, and even experimenters lack of experience can also quickly and efficiently complete the experiment step.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatographic column experiments, in particular to a chromatographic column cutting and positioning device. Background Art

[0002] Chromatography is a method used to separate various compounds in a mixture. Chromatographic columns are required for chromatographic analysis. Chromatographic columns are used in conjunction with analytical equipment to separate the test substances in the test sample. When using chromatography, it is necessary to carefully check whether the column head is flat or blocked. If it is not flat or blocked, it needs to be cut with a special ceramic knife, and the column head cut surface must be flat.

[0003] However, in traditional laboratory operations, when a chromatographic column is cut manually with a ceramic knife, it is impossible to ensure that a smooth column head section can be obtained in one cut. When the experimenter holds the chromatographic column and the ceramic knife for cutting, a slight shake will cause peaks and burrs on the section. Especially for inexperienced experimenters, multiple cuts are often required to obtain a smooth section, which easily leads to a waste of chromatographic column materials and delays the progress of the experiment. Utility Model Content

[0004] The utility model aims to provide a chromatographic column cutting and positioning device to solve the problems raised in the above background technology.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A chromatographic column cutting and positioning device comprises a base, a slide seat is slidably arranged on the top of the base, a cutting mechanism is arranged on the top of the slide seat, the cutting mechanism comprises a support fixedly mounted on the top of the slide seat, a ceramic blade and a handle for cutting are movably arranged on one side of the top of the support, a supporting mechanism is arranged on the support below near the ceramic blade, the supporting mechanism comprises a supporting plate slidably arranged on the side wall of the support, and a through hole is opened on the support near the support plate.

[0007] Preferably, a limiting cap threadably connected to the through hole is provided on the support, and a circular hole is provided through the center of the limiting cap.

[0008] Preferably, a horizontal frame is fixedly connected to one side of the top of the support, a magnifying glass is fixedly installed on the top of the horizontal frame, an end of the horizontal frame away from the support is fixedly connected to an inclined frame, the knife handle is slidably set on the inclined surface of the inclined frame, the ceramic blade is fixedly connected to the bottom end of the knife handle, and the blade of the ceramic blade is opposite to the top of the support plate.

[0009] Preferably, a fixing frame is fixedly provided on one side of the support near the bottom of the ceramic blade, and an adjusting bolt is threadedly connected to the fixing frame in a vertical direction. A cylindrical block is rotatably provided at the bottom end of the support plate, and the bottom end of the cylindrical block is fixedly connected to the top end of the adjusting bolt.

[0010] Preferably, a fixing seat is fixedly provided at the top of the base opposite to the sliding seat, and a positioning mechanism is installed at the top of the fixing seat. The positioning mechanism includes a cylinder fixedly provided at the top of the fixing seat, and the center of the cylinder is circular and through-shaped and is concentric with the through hole.

[0011] Preferably, a boss is provided at the top of the cylinder, a compression bolt is threadedly connected to the top of the boss, the bottom end of the compression bolt extends into the boss and is fixedly connected to a round cake, a telescopic airbag is provided inside the boss, the top of the telescopic airbag is fixedly connected to the bottom end of the round cake, the bottom end of the telescopic airbag is fixedly connected to the outer wall of the cylinder, a plurality of expansion airbags are provided at the center of the cylinder, the expansion airbags are evenly distributed along the length direction of the cylinder, the expansion airbags are fixedly provided on the inner wall of the cylinder and are connected to the telescopic airbags.

[0012] Preferably, a support rod is fixedly provided on the top of the base at a position away from the fixing seat, and a scale is fixedly provided between the top of the support rod and the cylinder.

[0013] Preferably, a locking assembly is fixedly provided on one side of the support close to the scale, and the locking assembly is sleeved on the scale.

[0014] Beneficial effects of the utility model:

[0015] 1. The utility model provides a cutting mechanism to cut the chromatographic column according to a fixed cutting angle and a fixed cutting trajectory, so that a chromatographic column with a smooth cut surface can be obtained quickly and simply. Even an inexperienced experimenter can complete this experimental step quickly and efficiently without cutting multiple times to delay the experimental progress and waste chromatographic column materials. After cutting the chromatographic column, the experimenter can also clearly observe whether the cut surface of the chromatographic column is smooth through a magnifying glass.

[0016] 2. The utility model can help the experimenter quickly find the position of the notch on the chromatographic column through the coordinated use of the positioning mechanism and the cutting mechanism, and the magnifying glass and the ceramic blade can move synchronously, and can accurately cut off the chromatographic column section with the notch to ensure the normal progress of the experiment. When the cutting mechanism and the scale are used in combination, the chromatographic column can also be cut according to the required length size. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2It is a structural schematic diagram of the cutting mechanism of the utility model;

[0019] Figure 3 It is a front view of the cutting mechanism of the utility model;

[0020] Figure 4 It is a schematic diagram of the connection between the limit cap and the through hole of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the positioning mechanism of the utility model.

[0022] In the figure:

[0023] 1. Base; 2. Slide; 3. Cutting mechanism; 31. Support; 32. Horizontal frame; 33. Magnifying glass; 34. Tilt frame; 35. Knife handle; 36. Ceramic blade; 37. Support mechanism; 371. Cylindrical block; 372. Adjusting bolt; 373. Fixed frame; 374. Support plate; 4. Fixed seat; 5. Positioning mechanism; 51. Cylinder; 52. Boss; 53. Compression bolt; 54. Round cake; 55. Telescopic airbag; 56. Inflatable airbag; 6. Support rod; 7. Scale; 8. Through hole; 9. Limiting cap; 10. Locking assembly. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A chromatographic column cutting and positioning device, such as Figure 1-Figure 5 As shown, the structural relationship is as follows: it includes a base 1, a slide 2 is slidably provided at the top of the base 1, a cutting mechanism 3 is provided at the top of the slide 2, the cutting mechanism 3 includes a support 31 fixedly installed at the top of the slide 2, a ceramic blade 36 and a handle 35 for cutting are movably provided on one side of the top of the support 31, a support mechanism 37 is provided on the support 31 near the bottom of the ceramic blade 36, the support mechanism 37 includes a support plate 374 slidably provided on the side wall of the support 31, and a through hole 8 is opened on the support 31 near the support plate 374. When using this device to cut a capillary chromatographic column, the experimenter needs to first pass one end of the chromatographic column through the through hole 8, and let the support plate 374 be supported under the chromatographic column, so that the part of the chromatographic column to be cut is horizontal, and then the experimenter presses the handle 35 downward, and the ceramic blade 36 can quickly cut the chromatographic column, which is convenient to operate and has a smooth incision.

[0026] Furthermore, a limiting cap 9 threadedly connected to the through hole 8 is provided on the support 31 , and a circular hole is formed through the center of the limiting cap 9 . The diameter of the circular holes on the limiting cap 9 is different from that on the limiting cap 9 of different specifications. When in use, the limiting cap 9 matching the diameter of the chromatographic column is selected. During the experiment, the end of the chromatographic column needs to be passed through the through hole 8 with one hand, and the end of the chromatographic column needs to be passed into the circular hole on the limiting cap 9. Then, the other hand is used to support the end face of the limiting cap 9 exposed outside the support 31, so that the end face of the chromatographic column is flush with the end face of the limiting cap 9. The limiting cap 9 can limit the chromatographic column by using the circular hole opened thereon to prevent the position of the chromatographic column from shifting during the cutting process. The distance between the cutting point of the ceramic blade 36 on the support plate 374 and the end face of the limiting cap 9 exposed outside the support 31 is one centimeter. After the chromatographic column is cut according to the above operation, the cut part is exactly one centimeter, which meets the experimental requirements during the chromatographic column experiment. No additional ruler is required for measurement, and the operation is convenient.

[0027] Furthermore, a horizontal frame 32 is fixedly connected to one side of the top of the support 31, a magnifying glass 33 is fixedly installed on the top of the horizontal frame 32, an end of the horizontal frame 32 away from the support 31 is fixedly connected to a tilting frame 34, a knife handle 35 is slidably set on the inclined surface of the tilting frame 34, a ceramic blade 36 is fixedly connected to the bottom end of the knife handle 35, and the blade of the ceramic blade 36 is opposite to the top of the support plate 374. The tilting frame 34 is tilted at an angle of 45 degrees, so that the ceramic blade 36 is also tilted at 45 degrees. When the knife handle 35 is pressed to cut the chromatographic column, the knife handle 35 and the ceramic blade 36 move down together along the inclined surface direction of the tilting frame 34 until the blade cuts the chromatographic column. A reset spring is also provided at the position where the knife handle 35 is slidably connected to the tilting frame 34. When the knife handle 35 is released after the chromatographic column is cut, the knife handle 35 and the ceramic blade 36 are automatically reset. Some inexperienced experimenters often have trouble mastering the cutting angle of the blade, and a slight shake of the hand during cutting can cause an uneven cut surface. The present device uses a fixed cutting angle and a fixed cutting trajectory, and can quickly and easily obtain a chromatographic column with a smooth cut surface. Even inexperienced experimenters can quickly and efficiently complete this experimental step, and will not delay the experimental progress and waste chromatographic column materials by cutting multiple times. After cutting the chromatographic column, the experimenter can observe downward through the magnifying glass 33, which can help the experimenter clearly observe whether the cut surface of the chromatographic column is smooth. If the cut surface is uneven due to some uncontrollable reasons, the above-mentioned cutting operation can be continued.

[0028] Furthermore, a fixing frame 373 is fixedly provided on one side of the support 31 near the bottom of the ceramic blade 36, and an adjusting bolt 372 is threadedly connected to the fixing frame 373 in a vertical direction. A cylindrical block 371 is rotatably provided at the bottom end of the support plate 374, and the bottom end of the cylindrical block 371 is fixedly connected to the top end of the adjusting bolt 372. By rotating the adjusting bolt 372, the height of the support plate 374 can be adjusted so that it can support chromatographic columns of different diameters and provide a supporting plane for cutting.

[0029] Furthermore, a fixing seat 4 is fixedly provided at the top of the base 1 at a position opposite to the sliding seat 2, and a positioning mechanism 5 is installed at the top of the fixing seat 4. The positioning mechanism 5 includes a cylinder 51 fixedly provided at the top of the fixing seat 4, the center of the cylinder 51 is a circular through-shape, and is concentrically matched with the through hole 8, a boss 52 is provided at the top of the cylinder 51, a compression bolt 53 is threadedly connected to the top of the boss 52, the bottom end of the compression bolt 53 extends into the boss 52 and is fixedly connected to a round cake 54, a telescopic airbag 55 is provided inside the boss 52, the top of the telescopic airbag 55 is fixedly connected to the bottom end of the round cake 54, the bottom end of the telescopic airbag 55 is fixedly connected to the outer wall of the cylinder 51, a plurality of expansion airbags 56 are provided at the center of the cylinder 51, the expansion airbags 56 are evenly distributed along the length direction of the cylinder 51, the expansion airbags 56 are fixedly provided on the inner wall of the cylinder 51 and are connected to the telescopic airbag 55. Some air ducts are provided inside the cylinder 51 to allow air to circulate between the telescopic airbag 55 and the expansion airbag 56. When the compression bolt 53 is rotated to move the round cake 54 downward, the round cake 54 squeezes the telescopic airbag 55, and the air inside the telescopic airbag 55 enters the expansion airbag 56, causing the expansion airbag 56 to inflate. When the compression bolt 53 is rotated in the opposite direction, the air returns to the telescopic airbag 55 due to the return spring provided inside the telescopic airbag 55, causing the expansion airbag 56 to deflate.

[0030] Furthermore, a support rod 6 is fixedly provided at the top of the base 1 at a position away from the fixing seat 4, and a scale 7 is fixedly provided between the top of the support rod 6 and the cylinder 51. When performing a chromatographic experiment, the capillary chromatographic column needs to be installed or removed. During the installation and removal process, the chromatographic column is subjected to friction, extrusion and other forces, which easily lead to a gap on its outer wall. The existence of the gap will cause the chromatographic column to leak during the experiment, so the position of the gap must be located and that section must be cut off before continuing the experiment. When it is necessary to locate the notch on the chromatographic column, the slide 2 and the cutting mechanism 3 are moved to a position on the base 1 close to the support rod 6, and then one end of the chromatographic column is passed through the center of the cylinder 51 and the limiting cap 9, and the compression bolt 53 is rotated to inflate the expansion bag 56, so that the expansion bag 56 wraps a part of the chromatographic column and fixes it (the expansion bag 56 is soft and can protect the outer wall of the fixed chromatographic column from damage). Then, while moving the support 31 toward the fixing seat 4, the magnifying glass 33 is used to observe whether there is a notch on the tube wall of the chromatographic column. If the position of the notch is found, the cutting mechanism 3 is used to cut off the section of the chromatographic column with the notch. If the position of the notch is not found, the chromatographic column is rotated and the other side is observed. The traditional method of locating the notch is to search through a handheld magnifying glass 33 and then use a blade to cut it off, but the notch is often very small. Once the magnifying glass 33 is not used for auxiliary observation, it is easy to cut the wrong position. The present device uses the positioning mechanism 5 and the cutting mechanism 3 in coordination, and the magnifying glass 33 and the ceramic blade 36 can move synchronously, which can help the experimenter quickly find the position of the notch on the chromatographic column and accurately cut off the chromatographic column section with the notch to ensure the normal progress of the experiment.

[0031] Furthermore, a locking assembly 10 is fixedly provided on one side of the support 31 close to the scale 7, and the locking assembly 10 is sleeved on the scale 7. The locking assembly 10 is composed of a ferrule and a screw, the ferrule is sleeved on the scale 7, the screw is threadedly connected to the top of the ferrule, and its bottom end can abut on the top surface of the scale 7. When the position of the slide 2 and the cutting mechanism 3 needs to be locked, the screw can be tightened, and when the slide 2 and the cutting mechanism 3 need to be moved, the screw can be loosened. When a fixed length section needs to be cut on the chromatographic column, the cutting mechanism 3 is moved to the specified position according to the scale on the scale 7 for cutting.

[0032] When the utility model is used, the experimenter needs to first use one hand to pass the end of the chromatographic column through the through hole 8, and needs to pass the end of the chromatographic column into the circular hole on the limiting cap 9, and then use the other hand to hold the end face of the limiting cap 9 exposed outside the support 31, so that the end face of the chromatographic column is flush with the end face of the limiting cap 9, and then the experimenter needs to press the handle 35 downward, and the ceramic blade 36 can quickly cut the chromatographic column, which is easy to operate and the incision is smooth. After cutting the chromatographic column, the experimenter can observe downward through the magnifying glass 33, which can help the experimenter clearly observe whether the cut surface of the chromatographic column is smooth. If the cut surface is not smooth due to some difficult-to-control reasons, the above-mentioned cutting operation can be continued. When it is necessary to locate the notch on the chromatographic column, the slide 2 and the cutting mechanism 3 are moved to a position on the base 1 close to the support rod 6, and then one end of the chromatographic column is passed through the center of the cylinder 51 and the limiting cap 9, and the compression bolt 53 is rotated to inflate the expansion airbag 56. The expansion airbag 56 wraps a part of the chromatographic column therein and fixes it. Then, while moving the support 31 toward the fixing seat 4, the magnifying glass 33 is used to observe whether there is a notch on the tube wall of the chromatographic column. If the position of the notch is found, the cutting mechanism 3 is used to cut off the section of the chromatographic column with the notch. If the position of the notch is not found, the chromatographic column is rotated and the other side is observed.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, 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. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] 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 aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chromatographic column cutting and positioning device, comprising a base (1), characterized in that: A slide seat (2) is slidably disposed at the top of the base (1), a cutting mechanism (3) is disposed at the top of the slide seat (2), the cutting mechanism (3) comprises a support (31) fixedly mounted on the top of the slide seat (2), a ceramic blade (36) and a handle (35) for cutting are movably disposed on one side of the top of the support (31), a support mechanism (37) is disposed on the support (31) below the ceramic blade (36), the support mechanism (37) comprises a support plate (374) slidably disposed on a side wall of the support (31), and a through hole (8) is provided on the support (31) at a position close to the support plate (374).

2. A chromatographic column cutting and positioning device according to claim 1, characterized in that: The support (31) is provided with a limiting cap (9) threadedly connected to the through hole (8), and a circular hole is formed through the center of the limiting cap (9).

3. A chromatographic column cutting and positioning device according to claim 1, characterized in that: A horizontal frame (32) is fixedly connected to one side of the top of the support (31), a magnifying glass (33) is fixedly mounted on the top of the horizontal frame (32), an end of the horizontal frame (32) away from the support (31) is fixedly connected to an inclined frame (34), a knife handle (35) is slidably arranged on the inclined surface of the inclined frame (34), a ceramic blade (36) is fixedly connected to the bottom end of the knife handle (35), and a blade of the ceramic blade (36) is opposite to the top of the support plate (374).

4. A chromatographic column cutting and positioning device according to claim 1, characterized in that: A fixing frame (373) is fixedly provided on one side of the support (31) near the bottom of the ceramic blade (36), and an adjusting bolt (372) is threadedly connected to the fixing frame (373) in a vertical direction. A cylindrical block (371) is rotatably provided at the bottom end of the support plate (374), and the bottom end of the cylindrical block (371) is fixedly connected to the top end of the adjusting bolt (372).

5. A chromatographic column cutting and positioning device according to claim 1, characterized in that: A fixing seat (4) is fixedly arranged at the top of the base (1) at a position opposite to the sliding seat (2), and a positioning mechanism (5) is installed at the top of the fixing seat (4). The positioning mechanism (5) comprises a cylinder (51) fixedly arranged at the top of the fixing seat (4), and the center of the cylinder (51) is circular and through-shaped, and is concentrically matched with the through hole (8).

6. A chromatographic column cutting and positioning device according to claim 5, characterized in that: The top of the cylinder (51) is provided with a boss (52), the top of the boss (52) is threadedly connected with a compression bolt (53), the bottom end of the compression bolt (53) extends into the boss (52) and is fixedly connected with a round cake (54), a telescopic airbag (55) is provided inside the boss (52), the top of the telescopic airbag (55) is fixedly connected to the bottom end of the round cake (54), the bottom end of the telescopic airbag (55) is fixedly connected to the outer wall of the cylinder (51), a plurality of expansion airbags (56) are provided at the center of the cylinder (51), the expansion airbags (56) are evenly distributed along the length direction of the cylinder (51), the expansion airbags (56) are fixedly arranged on the inner wall of the cylinder (51) and are connected to the telescopic airbag (55).

7. A chromatographic column cutting and positioning device according to claim 1, characterized in that: A support rod (6) is fixedly arranged at the top end of the base (1) at a position away from the fixed seat (4), and a scale (7) is fixedly arranged between the top end of the support rod (6) and the cylinder (51).

8. A chromatographic column cutting and positioning device according to claim 1, characterized in that: A locking assembly (10) is fixedly provided on one side of the support (31) close to the scale (7), and the locking assembly (10) is sleeved on the scale (7).

Images