Column scanning selection device for rod-shaped thin-layer chromatographic instrument

Abstract

The utility model relates to the technical field of chromatographic instrument equipment, in particular to a column scanning selection device for a rod-shaped thin-layer chromatographic instrument. The column scanning selection device for the rod-shaped thin-layer chromatograph comprises a base and side plates symmetrically installed on the two sides of the base, linear guide rails are installed on the inner side arms of the side plates, and a sliding frame is installed on the linear guide rails; the sliding rods are symmetrically installed on the sliding frame and are perpendicular to the linear guide rail, the two sets of sliding rods are slidably provided with the rod frame base, the inserting box is installed at the top end of the rod frame base, the rod frame supporting plate is movably inserted into the inserting box, and the limiting blocks are symmetrically inserted into the two sides of the top end of the inserting box. Limiting grooves matched with the limiting blocks in an inserted mode are formed in the two sides of the rod frame supporting plate, and a push plate assembly is installed at the tail end of the insertion box. The column scanning selection device for the rod-shaped thin-layer chromatographic instrument has the advantages of being stable in insertion and convenient to withdraw.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatograph equipment, in particular to a column scanning and selecting device for a rod thin layer chromatograph. Background Art

[0002] The rod thin layer chromatograph has the characteristics of simple operation, fast analysis speed, short analysis period, accurate analysis data, etc. This instrument is mainly used for the analysis and detection of organic compounds that are difficult to separate by gas chromatography and difficult to analyze by liquid chromatography. In particular, it is the only effective means for analyzing the group composition of macromolecular compounds. Rod thin layer chromatography is a new tool for analyzing the group components of organic matter and the content of macromolecular compounds. Its emergence makes up for the deficiencies of previous gas chromatography, liquid chromatography, plate thin layer chromatography, etc. in organic content analysis.

[0003] Among them, the rod thin layer chromatograph includes a detector and a column scanning and selecting device for chromatography. The column scanning and selecting device for chromatography sets a horizontal slide rail and a vertical slide rail, and then transmits the power of the driving motor through a lead screw nut pair, so as to select the chromatography column arranged on it to be in the scanning area of the detector for scanning. At present, a rod thin layer chromatograph disclosed in CN2924532Y has a guide rail, a motor and a screw rod that is in transmission connection with the motor and arranged parallel to the guide rail on the horizontal plane of the machine base. A slide plate is slidably arranged on the guide rail. A nut is arranged on the slide plate and is in transmission connection with the screw rod. A rod frame guide rail and a rod frame motor and a rod frame screw rod that is in transmission connection with the rod frame motor and arranged parallel to the rod frame guide rail are arranged on the slide plate. The setting direction of the rod frame guide rail is horizontally perpendicular to the setting direction of the guide rail. A rod frame assembly is slidably arranged on the rod frame guide rail. A rod frame nut is arranged on the rod frame assembly and is in transmission connection with the rod frame screw rod. A rod frame support table assembly is arranged on the rod frame assembly. The hydrogen flame detector is fixedly installed on the machine base. The scanning and selecting device of this chromatograph uses a drawer type to insert the rod frame support plate on the rod frame support table assembly. In this way, when scanning and moving, the rod frame support plate lacks limit fixation, and it is easy to shake and shift during the movement, affecting the scanning and observation.

[0004] Therefore, it is necessary to provide a new column scanning and selecting device for a rod thin layer chromatograph to solve the above technical problems. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides a column scanning and selecting device for a rod thin layer chromatograph.

[0006] The column scanning and selecting device for a rod thin layer chromatograph provided by the utility model includes: a base, and side plates symmetrically installed on both sides of the base. Linear guide rails are installed on the inner arms of the side plates, and sliding frames are installed on the linear guide rails.

[0007] The slide bars are symmetrically installed on the sliding frame, perpendicular to the linear guide rails, and a rod holder base is slidably installed on the two groups of slide bars. An insertion box is installed at the top of the rod holder base. A rod holder tray is movably inserted into the insertion box. On both sides of the top of the insertion box, limiting blocks are symmetrically inserted. Limiting grooves that are inserted and matched with the limiting blocks are formed on both sides of the rod holder tray. A push plate assembly is installed at the end of the insertion box.

[0008] Preferably, a lead screw is rotatably installed on the base, and a threaded through hole that is threadedly connected to the lead screw is formed in the bottom horizontal plate of the sliding frame. A servo motor for driving the lead screw to rotate is installed on the base.

[0009] Preferably, an electric telescopic rod is fixedly installed on the sliding frame, and the telescopic end of the electric telescopic rod is fixedly connected to the rod holder base.

[0010] Preferably, an arc chamfer is formed on one side of the bottom end of the limiting block, and the arc chamfer faces the outside of the insertion box.

[0011] Preferably, the push plate assembly includes a connecting plate. Insertion rods are symmetrically installed on the connecting plate. The insertion rods are movably inserted into the end of the insertion box, and a return spring is sleeved on the insertion rods. One end of the return spring is fixedly connected to the insertion box, and the other end of the return spring is fixedly connected to the connecting plate. A top plate for pushing the rod holder tray is installed in the middle of the connecting plate. A through groove through which the top plate passes is formed in the insertion box.

[0012] Preferably, a plurality of placement grooves are formed on the upper surface of the rod holder tray, and a baffle for blocking the plurality of placement grooves is installed on the upper surface of the insertion box.

[0013] Preferably, a pull handle is installed at one end of the rod holder tray close to the limiting groove, and insertion holes that are inserted and matched with the insertion rods are symmetrically formed at the other end of the rod holder tray.

[0014] Compared with the related art, the column scanning and selection device for a rod-shaped thin layer chromatograph provided by the present utility model has the following beneficial effects:

[0015] 1. The present utility model provides a column scanning and selection device for a rod-shaped thin layer chromatograph. By arranging an insertion box on the rod holder base, a rod holder tray that is movably inserted is arranged on the insertion box, and it is limited and fixed by a limiting block, so as to ensure the stability during the movement after insertion;

[0016] 2. A push plate assembly is arranged on the insertion box. After the limiting of the limiting block is released, the rod holder tray can be automatically pushed out of the insertion box under the pushing of the top plate, improving the convenience of taking out and inserting the rod holder tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1Schematic diagram of a preferred embodiment of the column scanning selection device for a rod-shaped thin layer chromatograph provided by the present utility model;

[0018] Figure 2 Schematic diagram of another perspective of the column scanning selection device for a rod-shaped thin layer chromatograph provided by the present utility model;

[0019] Figure 3 Schematic diagram of the structure with an insertion box installed on the rod holder base provided by the present utility model;

[0020] Figure 4 Schematic diagram of the rod holder support plate provided by the present utility model;

[0021] Figure 5 Schematic diagram of the limiting block provided by the present utility model.

[0022] Reference numerals in the figure: 1, base; 11, side plate; 12, linear guide rail; 13, lead screw; 14, servo motor; 2, sliding frame; 21, electric telescopic rod; 3, sliding rod; 4, rod holder base; 5, insertion box; 51, baffle; 6, rod holder support plate; 61, pull handle; 601, limiting groove; 602, placement groove; 603, insertion hole; 7, limiting block; 71, arc chamfer; 8, push plate assembly; 81, connecting plate; 82, insertion rod; 83, return spring; 84, top plate. Detailed implementation manners

[0023] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] The following describes the specific implementation of the present utility model in detail with reference to specific embodiments.

[0025] Please refer to Figures 1 to 5 , a column scanning selection device for a rod-shaped thin layer chromatograph provided by an embodiment of the present utility model, the column scanning selection device for a rod-shaped thin layer chromatograph includes:

[0026] Base 1, and side plates 11 symmetrically installed on both sides of the base 1, linear guide rails 12 are installed on the inner arms of the side plates 11, and a sliding frame 2 is installed on the linear guide rails 12;

[0027] There are two sets of sliding rods 3, which are symmetrically installed on the sliding frame 2 and are perpendicularly distributed to the linear guide rail 12. A rod holder seat 4 is slidably installed on the two sets of sliding rods 3. An insertion box 5 is installed at the top end of the rod holder seat 4. A rod holder tray 6 is movably inserted into the insertion box 5. Limiting blocks 7 are symmetrically inserted on both sides of the top end of the insertion box 5. Limiting slots 601 for plugging and cooperating with the limiting blocks 7 are formed on both sides of the rod holder tray 6. A push plate assembly 8 is installed at the end of the insertion box 5.

[0028] Among them, a lead screw 13 is rotatably installed on the base 1, and a threaded through hole for threaded connection with the lead screw 13 is formed in the bottom horizontal plate of the sliding frame 2. A servo motor 14 for driving the lead screw 13 to rotate is installed on the base 1. An electric telescopic rod 21 is fixedly installed on the sliding frame 2, and the telescopic end of the electric telescopic rod 21 is fixedly connected to the rod holder seat 4.

[0029] It should be noted that: during use, place the rod holder sample on the rod holder tray 6, then insert it into the insertion box 5. After insertion, insert the limiting block 7 into the limiting slot 601 on the rod holder tray 6 to fix the rod holder tray 6 in the insertion box 5. After placing it, when it needs to be moved, control the servo motor 14 to drive the lead screw 13 to rotate, so as to drive the sliding frame 2 to move along the linear guide rail 12, and then control the electric telescopic rod 21 to push the rod holder seat 4 to slide along the sliding rod 3, so as to realize combined movement for scanning and selection. When it is necessary to remove the rod holder tray 6 for cleaning or replacing the rod holder sample, pull out the limiting block 7 and the rod holder tray 6 can be directly pushed out through the push plate assembly 8, which is convenient for taking.

[0030] In this embodiment: an arc chamfer 71 is formed on one side of the bottom end of the limiting block 7, and the arc chamfer 71 faces the outside of the insertion box 5. In this way, when inserting the rod holder tray 6, the limiting block 7 is inserted into the insertion box 5. When the front end of the rod holder tray 6 contacts the arc chamfer 71, the limiting block 7 can be pushed up until the limiting slot 601 moves below the limiting block 7 and then automatically falls and is inserted into the limiting slot 601 to complete plugging and limiting.

[0031] It should be noted that: in order to prevent the limiting block 7 from falling off when removed, a connecting spring can be arranged between the limiting block 7 and the insertion box 5 for connection.

[0032] In the embodiment of the present utility model, please refer to Figures 1 to 5 , the push plate assembly 8 includes a connecting plate 81, insertion rods 82 are symmetrically installed on the connecting plate 81, the insertion rods 82 are movably inserted into the end of the insertion box 5, and a return spring 83 is sleeved on the insertion rods 82. One end of the return spring 83 is fixedly connected to the insertion box 5, and the other end of the return spring 83 is fixedly connected to the connecting plate 81. A top plate 84 for pushing the rod holder tray 6 is installed in the middle of the connecting plate 81. A through groove through which the top plate 84 passes is formed in the insertion box 5;

[0033] One end of the rod rack support plate 6 close to the limit groove 601 is provided with a pull handle 61, and the other end of the rod rack support plate 6 is symmetrically provided with insertion holes 603 which are in plug-in fit with the insertion rods 82.

[0034] It should be noted that when the push plate assembly 8 is in use, after the limit block 7 is pulled out of the limit groove 601, under the pulling of the return spring 83, the connecting plate 81 drives the top plate 84 to push out the rod rack support plate 6 in the insertion box 5. At this time, the limit block 7 is lifted, and the rod rack support plate 6 can be pulled out of the insertion box 5 by pulling the pull handle 61. When inserting, the cooperation of the insertion holes 603 and the insertion rods 82 can further limit and fix the rod rack support plate 6.

[0035] In this embodiment: a plurality of placement grooves 602 are formed on the upper surface of the rod rack support plate 6, and a baffle 51 for blocking the plurality of placement grooves 602 is installed on the upper surface of the insertion box 5. In this way, by the cooperation of the placement grooves 602 and the baffle 51, adjacent rod rack specimens can be prevented from contacting and interfering with each other due to movement, avoiding scanning interference.

[0036] The working principle of the column scanning and selection device for the rod-shaped thin-layer chromatograph provided by the present invention is as follows:

[0037] When in use, the rod rack specimen is placed in the placement groove 602 on the rod rack support plate 6, and then inserted onto the insertion box 5. When inserting, when the front end of the rod rack support plate 6 contacts the arc chamfer 71, the limit block 7 can be pushed upward until the limit groove 601 moves below the limit block 7 and automatically falls and is inserted into the limit groove 601 to complete the plug-in limit and fix the rod rack support plate 6 in the insertion box 5. After placing, when it needs to be moved, the servo motor 14 is controlled to drive the lead screw 13 to rotate, so as to drive the sliding frame 2 to move along the linear guide rail 12, and then the electric telescopic rod 21 is controlled to push the rod rack seat 4 to slide along the sliding rod 3, so as to realize combined movement for scanning and selection. When it is necessary to remove the rod rack support plate 6 for cleaning or replacing the rod rack specimen, after the limit block 7 is pulled out of the limit groove 601, under the pulling of the return spring 83, the connecting plate 81 drives the top plate 84 to push out the rod rack support plate 6 in the insertion box 5. At this time, the limit block 7 is lifted, and the rod rack support plate 6 can be pulled out of the insertion box 5 by pulling the pull handle 61.

[0038] The circuits and controls involved in the present invention are all prior arts and will not be elaborated here too much.

[0039] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. A column scanning selection device for a rod-shaped thin-layer chromatograph, comprising: a base (1), and side plates (11) symmetrically installed on both sides of the base (1). Linear guide rails (12) are installed on the inner arms of the side plates (11), and a sliding frame (2) is installed on the linear guide rails (12); It is characterized in that it further comprises: slide bars (3), there are two groups, the two groups of slide bars (3) are symmetrically installed on the sliding frame (2), and are vertically distributed with the linear guide rails (12). A rod holder seat (4) is slidably installed on the two groups of slide bars (3). An insertion box (5) is installed at the top end of the rod holder seat (4). A rod holder support plate (6) is movably inserted into the insertion box (5). Limiting blocks (7) are symmetrically inserted on both sides of the top end of the insertion box (5). Limiting grooves (601) inserted and matched with the limiting blocks (7) are formed on both sides of the rod holder support plate (6). A push plate assembly (8) is installed at the end of the insertion box (5).

2. The column scanning selection device for a rod thin layer chromatograph according to claim 1, wherein A lead screw (13) is rotatably installed on the base (1), and a threaded through hole threadedly connected with the lead screw (13) is formed in the bottom cross plate of the sliding frame (2). A servo motor (14) for driving the lead screw (13) to rotate is installed on the base (1).

3. The column scanning selection device for the rod thin layer chromatograph according to claim 1, characterized in that An electric telescopic rod (21) is fixedly installed on the sliding frame (2), and the telescopic end of the electric telescopic rod (21) is fixedly connected with the rod holder seat (4).

4. The column scanning selection device for a rod thin layer chromatograph according to claim 1, characterized in that, An arc chamfer (71) is formed on one side of the bottom end of the limiting block (7), and the arc chamfer (71) faces the outside of the insertion box (5).

5. The column scanning selection device for the rod thin layer chromatograph according to claim 1, wherein The push plate assembly (8) includes a connecting plate (81). Plug rods (82) are symmetrically installed on the connecting plate (81). The plug rods (82) are movably inserted into the end of the insertion box (5). A return spring (83) is sleeved on the plug rods (82). One end of the return spring (83) is fixedly connected with the insertion box (5), and the other end of the return spring (83) is fixedly connected with the connecting plate (81). A top plate (84) for pushing the rod holder support plate (6) is installed in the middle of the connecting plate (81). A through groove through which the top plate (84) passes is formed in the insertion box (5).

6. The column scanning selection device for a rod thin layer chromatograph according to claim 5, characterized in that, A plurality of placement grooves (602) are formed on the upper surface of the rod holder support plate (6). A baffle (51) for blocking the plurality of placement grooves (602) is installed on the upper surface of the insertion box (5).

7. The column scanning selection device for a rod thin layer chromatograph according to claim 5, characterized in that, A pull handle (61) is installed at one end of the rod holder support plate (6) close to the limiting groove (601). Plug holes (603) inserted and matched with the plug rods (82) are symmetrically formed at the other end of the rod holder support plate (6).

Images