Sample introduction assembly of high performance liquid chromatograph

Abstract

The utility model relates to the technical field of liquid chromatographs, in particular to a sample introduction assembly of a high performance liquid chromatograph, which comprises a base, a first clamping plate is fixedly connected to one end, close to the center of a placing hole, of each of a plurality of first springs, and a plurality of elastic balls are fixedly connected to the inner wall surfaces of the first clamping plates; vertical plates are fixedly connected to the left portion and the right portion of the upper end of the base correspondingly, threaded rods are in threaded connection to the upper portions of the outer side faces of the two vertical plates correspondingly, rotary knobs are fixedly connected to the outer side faces of the two threaded rods correspondingly, and second springs are fixedly connected to the upper portions of the inner side faces of the two vertical plates correspondingly. Second clamping plates are fixedly connected to the inner side faces of the two second springs correspondingly, and elastic pads are fixedly connected to the inner wall faces of the two second clamping plates correspondingly. According to the sample introduction assembly of the high performance liquid chromatograph, the screw rod is arranged, so that the sample bottle is clamped and fixed, the placement stability of the sample bottle can be effectively improved, and the sampling stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid chromatographs, in particular to a sample injection component of a high performance liquid chromatograph. Background Art

[0002] Liquid chromatograph is an instrument that uses the difference in the distribution ratio of the mixture between liquid-solid or two immiscible liquids to separate the mixture first and then analyze and identify it. Liquid chromatographs are divided into liquid-liquid chromatography (LLC) and liquid-solid chromatography (LSC) according to whether the stationary phase is liquid or solid. Modern liquid chromatographs are composed of high-pressure infusion pumps, injection systems, temperature control systems, chromatographic columns, detectors, signal recording systems, etc. Compared with the classic liquid column chromatography device, it has the characteristics of high efficiency, rapidity, and sensitivity. The injection component of the high-performance liquid chromatograph is generally placed on the desktop for sampling operations. Generally, the placement stability of the sample bottle is low and it is easy to tip over when touched, which will have a certain impact on the work efficiency of the staff, and the stability of the sampling process is not high. Therefore, we have introduced an injection component for high-performance liquid chromatograph. Utility Model Content

[0003] The main purpose of the utility model is to provide a sample injection component for a high performance liquid chromatograph, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A sample injection assembly for a high performance liquid chromatograph comprises a base, wherein the front end and the rear end of the base are fixedly connected to two fixing blocks, the upper ends of the four fixing blocks are provided with fixing holes that pass through from top to bottom, a placement seat is fixedly connected to the middle part of the upper end of the base, a placement hole is provided at the upper end of the placement seat, a plurality of No. 1 springs are fixedly connected to the inner wall surface of the placement hole, a plurality of No. 1 springs are fixedly connected to one end close to the center of the placement hole, a plurality of No. 1 clamping plates are fixedly connected to the inner wall surfaces of a plurality of No. 1 clamping plates, a plurality of elastic balls are fixedly connected to the left and right parts of the upper end of the base, The upper parts of the outer sides of the two vertical plates are threadedly connected with screws, the outer sides of the two screws are fixedly connected with knobs, the upper parts of the inner sides of the two vertical plates are fixedly connected with No. 2 springs, the inner sides of the two No. 2 springs are fixedly connected with No. 2 plywood, the inner walls of the two No. 2 plywood are fixedly connected with elastic pads, the middle part of the rear end of the base is fixedly connected with a support plate, the upper part of the front end of the support plate is fixedly connected with a top plate, the front part of the lower end of the top plate is fixedly installed with an electric push rod, the output end of the electric push rod is fixedly installed with a liquid cylinder, and the lower end of the liquid cylinder is fixedly connected with a needle tube.

[0006] Preferably, a plurality of said No. 1 springs are distributed in a central annular array of placement holes.

[0007] Preferably, the plurality of elastic balls are distributed in a rectangular array.

[0008] Preferably, the plurality of elastic balls and the two elastic pads are all made of rubber material.

[0009] Preferably, a circular hole is opened in the middle of the outer surface of the two second clamping plates, and the inner side surfaces of the two screw rods are movably sleeved in the corresponding two circular holes respectively.

[0010] Preferably, the two screw rods are respectively located in the corresponding two No. 2 springs and there are gaps between the two screw rods and the inner wall surfaces of the corresponding two No. 2 springs.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. By setting a No. 1 spring, a No. 1 clamping plate and an elastic ball, the corresponding No. 1 clamping plates are moved by using the action of several No. 1 springs, so that the spacing between the several No. 1 clamping plates becomes larger, and then the sample bottle is placed in the placement hole and located between the several No. 1 clamping plates, and then the No. 1 springs are slowly loosened to reset the several No. 1 clamping plates until the several elastic balls contact the sample bottle, so as to clamp the lower part of the sample bottle and improve the stability of the lower part of the sample bottle.

[0013] 2. By setting a screw rod, the corresponding two screw rods are rotated through two knobs to drive the corresponding two No. 2 clamps to move respectively, and at the same time the corresponding two No. 2 springs are deformed until the two elastic pads are in contact with the upper part of the sample bottle and tightly against the sample bottle, thereby achieving the clamping and fixing of the sample bottle, which can effectively improve the placement stability of the sample bottle, thereby improving the sampling stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a sample injection assembly of a high performance liquid chromatograph of the utility model;

[0015] Figure 2 It is a schematic diagram of the combined connection structure of a placement seat, a No. 1 spring, a No. 1 clamping plate and an elastic ball of a sample injection assembly of a high performance liquid chromatograph of the utility model;

[0016] Figure 3 This is a schematic diagram of the combined connection structure of a vertical plate, a screw rod, a knob, a No. 2 spring, a No. 2 clamping plate and an elastic pad of an injection assembly of a high performance liquid chromatograph of the utility model;

[0017] Figure 4 The utility model is a schematic diagram of the combined connection structure of an electric push rod, a liquid cylinder and a needle tube of an injection component of a high performance liquid chromatograph.

[0018] In the figure: 1. base; 2. fixing block; 3. fixing hole; 4. placement seat; 5. placement hole; 6. No. 1 spring; 7. No. 1 clamping plate; 8. elastic ball; 9. vertical plate; 10. screw; 11. knob; 12. No. 2 spring; 13. No. 2 clamping plate; 14. elastic pad; 15. support plate; 16. top plate; 17. electric push rod; 18. liquid cylinder; 19. needle tube. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1-4 , the utility model provides a technical solution:

[0023] A sample injection assembly for a high performance liquid chromatograph comprises a base 1, wherein the front end and the rear end of the base 1 are fixedly connected to two fixed blocks 2, the upper ends of the four fixed blocks 2 are all provided with fixing holes 3 that pass through from top to bottom, a placement seat 4 is fixedly connected to the middle of the upper end of the base 1, a placement hole 5 is provided at the upper end of the placement seat 4, a plurality of No. 1 springs 6 are fixedly connected to the inner wall surface of the placement hole 5, a plurality of No. 1 springs 6 are fixedly connected to one end close to the center of the placement hole 5, a plurality of No. 1 clamps 7 are fixedly connected to the inner wall surfaces of the plurality of No. 1 clamps 7, a plurality of elastic balls 8 are fixedly connected to the inner wall surfaces of the plurality of No. 1 clamps 7, a vertical plate 9 is fixedly connected to the upper left and upper right parts of the base 1, and the outer sides of the two vertical plates 9 are fixedly connected to the outer sides of the two vertical plates 9. The upper part of the surface is threadedly connected with a screw rod 10, the outer side surfaces of the two screw rods 10 are fixedly connected with a knob 11, the upper part of the inner side surfaces of the two vertical plates 9 are fixedly connected with a No. 2 spring 12, the inner side surfaces of the two No. 2 springs 12 are fixedly connected with a No. 2 clamping plate 13, the inner wall surfaces of the two No. 2 clamping plates 13 are fixedly connected with an elastic pad 14, a support plate 15 is fixedly connected to the middle part of the rear end of the base 1, a top plate 16 is fixedly connected to the upper front end of the support plate 15, an electric push rod 17 is fixedly installed at the front part of the lower end of the top plate 16, a liquid cylinder 18 is fixedly installed at the output end of the electric push rod 17, and a needle tube 19 is fixedly connected to the lower end of the liquid cylinder 18.

[0024] In this embodiment, a plurality of No. 1 springs 6 are distributed in a central annular array of the placement hole 5; a plurality of elastic balls 8 are distributed in a rectangular array; a plurality of elastic balls 8 and two elastic pads 14 are all made of rubber material; a circular hole is opened in the middle of the outer surface of the two No. 2 splints 13, and the inner side surfaces of the two screw rods 10 are movably sleeved in the corresponding two circular holes respectively; the two screw rods 10 are respectively located in the corresponding two No. 2 springs 12 and there are gaps between them and the inner wall surfaces of the corresponding two No. 2 springs 12 respectively.

[0025] It should be noted that the utility model is a sample injection assembly for a high performance liquid chromatograph. During use, the base 1 is fixed at a suitable position of the liquid chromatograph by using four fixing holes 3, and the corresponding number of number one clamping plates 7 are moved by using the function of a number of number one springs 6, so that the spacing between the number one clamping plates 7 becomes larger, and then the sample bottle is placed in the placement hole 5 and located between the number one clamping plates 7, and then the number one springs 6 are slowly loosened to reset the number one clamping plates 7 until the number of elastic balls 8 contact the sample bottle, so as to achieve the effect of placing the sample bottle in the sample bottle. The lower part of the sample bottle is clamped, which improves the stability of the lower part of the sample bottle. The two corresponding screws 10 are rotated by the two knobs 11 to drive the corresponding two No. 2 clamps 13 to move respectively, and the corresponding two No. 2 springs 12 are deformed at the same time, until the two elastic pads 14 are in contact with the upper part of the sample bottle and tightly against the sample bottle, thereby achieving the clamping and fixing of the sample bottle, which can effectively improve the placement stability of the sample bottle, thereby improving the sampling stability, and then the electric push rod 17 drives the needle tube 19 to move downward, insert it into the sample bottle for sampling and then inject the sample.

[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A sample injection assembly for a high performance liquid chromatograph, comprising a base (1), characterized in that: The front and rear ends of the base (1) are fixedly connected to two fixing blocks (2), and the upper ends of the four fixing blocks (2) are each provided with a fixing hole (3) that passes through from top to bottom. The middle of the upper end of the base (1) is fixedly connected to a placement seat (4), and the upper end of the placement seat (4) is provided with a placement hole (5). The inner wall surface of the placement hole (5) is fixedly connected to a plurality of No. 1 springs (6), and one end of the plurality of No. 1 springs (6) close to the center of the placement hole (5) is fixedly connected to a No. 1 clamping plate (7), and the inner wall surfaces of the plurality of No. 1 clamping plates (7) are fixedly connected to a plurality of elastic balls (8). The left and right upper ends of the base (1) are fixedly connected to a vertical plate (9), and the upper parts of the outer surfaces of the two vertical plates (9) are threadedly connected to screw rods. (10), the outer side surfaces of the two screw rods (10) are fixedly connected with knobs (11), the upper inner side surfaces of the two vertical plates (9) are fixedly connected with No. 2 springs (12), the inner side surfaces of the two No. 2 springs (12) are fixedly connected with No. 2 clamps (13), the inner wall surfaces of the two No. 2 clamps (13) are fixedly connected with elastic pads (14), the middle part of the rear end of the base (1) is fixedly connected with a support plate (15), the upper front end of the support plate (15) is fixedly connected with a top plate (16), the front lower end of the top plate (16) is fixedly installed with an electric push rod (17), the output end of the electric push rod (17) is fixedly installed with a liquid cylinder (18), and the lower end of the liquid cylinder (18) is fixedly connected with a needle tube (19).

2. The sample injection assembly of a high performance liquid chromatograph according to claim 1, characterized in that: A plurality of the No. 1 springs (6) are distributed in a central annular array of the placement hole (5).

3. The sample injection assembly of a high performance liquid chromatograph according to claim 1, characterized in that: The plurality of elastic balls (8) are distributed in a rectangular array.

4. The sample injection assembly of a high performance liquid chromatograph according to claim 1, characterized in that: The plurality of elastic balls (8) and the two elastic pads (14) are all made of rubber material.

5. The sample injection assembly of a high performance liquid chromatograph according to claim 1, characterized in that: A circular hole is opened in the middle of the outer surface of the two second clamping plates (13), and the inner side surfaces of the two screw rods (10) are movably sleeved in the corresponding two circular holes.

6. The sample injection assembly of a high performance liquid chromatograph according to claim 1, characterized in that: The two screw rods (10) are respectively located in the corresponding two No. 2 springs (12) and there are gaps between the two screw rods and the inner wall surfaces of the corresponding two No. 2 springs (12).

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