Liquid sample injector

Abstract

The utility model discloses a liquid sample injector, which belongs to the field of liquid sample injectors and comprises a sample injector body, the sample injector body comprises a rack, a stand column and a slide rail, the rack is slidably connected with the slide rail, the stand column is perpendicular to the slide rail and is in up-down sliding fit with the slide rail, and the left side of the bottom of the rack is fixedly connected with a detection head. A rotating assembly is arranged on the left side of the bottom of the rack and sleeves the upper part of the detection head; the rotating assembly comprises a plane bearing, the top of the plane bearing is fixedly connected to the left side of the bottom of the rack, the bottom of the plane bearing is fixedly connected with a rotating ring, the plane bearing and the rotating ring sleeve the upper portion of a detection head, the outer wall of the rotating ring is fixedly sleeved with a first gear, the upper portion of the detection head is in clearance fit with the bottom of the rack, and the outer wall of the upper portion of the detection head is in clearance fit with the inner wall of the rotating ring.

Description

Technical Field

[0001] The utility model belongs to the field of liquid injectors, and in particular relates to a liquid injector. Background Art

[0002] The injector is a device in the chromatography system that can quantitatively deliver analytical samples into the chromatographic column. Its principle is to place the sample to be tested in a closed container, heat it to make the volatile components evaporate from the sample matrix, and reach equilibrium in the gas-liquid (or gas-solid) two phases. Chromatographic analysis is performed directly on the top to verify the composition and content of the volatile components in the sample.

[0003] Most of the existing sample injectors use a turntable to place multiple reagent tubes. The sample turntable device and the sample injector need to cooperate to position each reagent tube. In actual use, the sample injector needle is not cleaned one by one during the process of continuous contact with multiple reagent tubes, which will cause cross contamination of reagents and affect the accuracy of detection. Utility Model Content

[0004] In view of one or more of the above defects or improvement requirements in the prior art, the utility model provides a liquid injector.

[0005] To achieve the above-mentioned purpose, the utility model provides a liquid injector, including an injector body, the injector body including a frame, a column and a slide rail, the frame is slidably connected to the slide rail, the column is arranged perpendicular to the slide rail, the column and the slide rail slide up and down, a detection head is fixedly connected to the left side of the bottom of the frame, a rotating assembly is arranged on the left side of the bottom of the frame, and the rotating assembly is sleeved on the upper part of the detection head;

[0006] The rotating assembly includes a plane bearing, the top of the plane bearing is fixedly connected to the left side of the bottom of the frame, the bottom of the plane bearing is fixedly connected to a swivel, the plane bearing and the swivel are respectively sleeved on the upper part of the detection head, the outer wall of the swivel is fixedly sleeved with a gear 1, the upper part of the detection head and the bottom of the frame are clearance matched, and the outer wall of the upper part of the detection head and the inner wall of the swivel are clearance matched;

[0007] A servo motor is fixedly connected to the right side of the bottom of the frame, and a gear 2 is fixedly connected to the output shaft of the servo motor. The gear 2 is clearance-matched with the bottom of the frame, and the gear 1 and the gear 2 are meshed. A cleaning mechanism is arranged at the bottom of the rotating ring.

[0008] The cleaning mechanism includes a mounting plate, the top of the mounting plate is fixedly connected to the left side of the bottom of the swivel, the bottom of the mounting plate is provided with a rotating plate, a hinge buckle is provided between the mounting plate and the rotating plate, and the mounting plate and the rotating plate are rotatably connected by the hinge buckle; the two ends of the hinge buckle are respectively fixedly connected to the bottom of the mounting plate and the top of the rotating plate, the rotating plate is L-shaped, and the rotating plate and the left side of the mounting plate are respectively fixedly connected with hinge seats, the two hinge seats are connected by a micro cylinder, the two ends of the micro cylinder are hinged to the two hinge seats, and the inner wall of the bottom of the rotating plate is fixedly connected with cleaning cotton, and the cleaning cotton is in contact with the outer wall and bottom wall of the detection head.

[0009] In general, compared with the prior art, the above technical solutions conceived by the utility model have the following beneficial effects:

[0010] The liquid sampler of the utility model drives the cleaning cotton to rotate, and the cleaning cotton can wipe and clean the surface of the detection head during the process, thereby avoiding the influence of the detection result caused by the repeated use of the detection head without cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the rotating assembly of the utility model;

[0013] Figure 3 This is a schematic diagram of the structure of an embodiment of the utility model after the rotating plate rotates;

[0014] Figure 4 It is a schematic diagram of the cross-sectional structure of the swivel of the utility model.

[0015] In all the drawings, the same figure numbers represent the same technical features, specifically: 1. Sampler body; 2. Frame; 3. Detection head; 4. Rotating assembly; 41. Plane bearing; 42. Swivel; 43. Gear 1; 5. Servo motor; 6. Gear 2; 7. Cleaning mechanism; 71. Mounting plate; 72. Turntable; 73. Articulated buckle; 74. Articulated seat; 75. Micro cylinder; 76. Cleaning cotton; 8. Slide rail; 9. Turntable; 10. Test tube; 11. Column. DETAILED DESCRIPTION

[0016] Depend on Figure 1-4 A liquid injector is provided, comprising an injector body 1, the injector body 1 comprising a frame 2, a column 11 and a slide rail 8, the frame 2 is slidably connected to the slide rail 8, the column 11 is arranged perpendicular to the slide rail 8, and the column 11 and the slide rail 8 slide up and down in cooperation; a detection head 3 is fixedly connected to the left side of the bottom of the frame 2, a rotating assembly 4 is arranged on the left side of the bottom of the frame 2, and the rotating assembly 4 is sleeved on the upper part of the detection head 3;

[0017] The rotating assembly 4 includes a plane bearing 41, the top of the plane bearing 41 is fixedly connected to the left side of the bottom of the frame 2, the bottom of the plane bearing 41 is fixedly connected to a swivel 42, the plane bearing 41 and the swivel 42 are respectively sleeved on the upper part of the detection head 3, the outer wall of the swivel 42 is fixedly sleeved with a gear 1 43, the upper part of the detection head 3 and the bottom of the frame 2 are clearance matched, and the upper outer wall of the detection head 3 and the inner wall of the swivel 42 are clearance matched;

[0018] A servo motor 5 is fixedly connected to the right side of the bottom of the frame 2, and a gear 2 6 is fixedly connected to the output shaft of the servo motor 5. The gear 2 6 is clearance-matched with the bottom of the frame 2, and the gear 1 43 and the gear 2 6 are meshed; a cleaning mechanism 7 is provided at the bottom of the rotating ring 42.

[0019] The cleaning mechanism 7 includes a mounting plate 71, the top of which is fixedly connected to the left side of the bottom of the rotating ring 42, a rotating plate 72 is provided at the bottom of the mounting plate 71, a hinge buckle 73 is provided between the mounting plate 71 and the rotating plate 72, and the mounting plate 71 and the rotating plate 72 are rotatably connected via the hinge buckle 73; the two ends of the hinge buckle 73 are respectively fixedly connected to the bottom of the mounting plate 71 and the top of the rotating plate 72, the rotating plate 72 is L-shaped, and the rotating plate 72 and the left side of the mounting plate 71 are respectively fixedly connected with hinge seats 74, the two hinge seats 74 are connected by a micro cylinder 75, the two ends of the micro cylinder 75 are hinged to the two hinge seats 74, and a cleaning cotton 76 is fixedly connected to the inner wall of the bottom of the rotating plate 72, and the cleaning cotton 76 is in contact with the outer wall and the bottom wall of the detection head 3.

[0020] The present invention only protects the devices outside the sampler body 1. The sampler body 1 also includes a turntable 9 and a test tube 10. The turntable 9 is plugged with the test tube 10. The detection head 3 is inserted into the test tube 10 for detection. The test tube 10 contains the sample liquid to be detected. In the liquid sampler of the present invention, when the detection head 3 needs to be cleaned, the servo motor 5 is powered on and drives the gear 2 6, the gear 1 43, the swivel 42, the mounting plate 71, the rotating plate 72 and the cleaning cotton 76 to rotate in sequence. The cleaning cotton 76 can wipe and clean the surface of the detection head 3 during this process, and the cleaning liquid can be manually added to the cleaning cotton 76; thereby preventing the detection head 3 from being reused without being cleaned and affecting the detection result. After the cleaning is completed, the micro cylinder 75 contracts and pulls the rotating plate 72 to rotate with the hinge buckle 73 as the center (such as Figure 3 state), so that the rotating plate 72 and the cleaning cotton 76 are away from the detection head 3, and the normal use of the detection head 3 and the injector body 1 is not affected.

Claims

1. A liquid injector, comprising an injector body (1), the injector body (1) comprising a frame (2), a column (11) and a slide rail (8), the frame (2) and the slide rail (8) are slidably connected, the column (11) is arranged perpendicular to the slide rail (8), the column (11) and the slide rail (8) are slidably matched up and down, characterized in that: A detection head (3) is fixedly connected to the left side of the bottom of the frame (2); a rotating assembly (4) is arranged on the left side of the bottom of the frame (2); and the rotating assembly (4) is sleeved on the upper part of the detection head (3); The rotating assembly (4) comprises a plane bearing (41), the top of the plane bearing (41) is fixedly connected to the left side of the bottom of the frame (2), the bottom of the plane bearing (41) is fixedly connected to a rotating ring (42), the plane bearing (41) and the rotating ring (42) are respectively sleeved on the upper part of the detection head (3), the outer wall of the rotating ring (42) is fixedly sleeved with a gear 1 (43), the upper part of the detection head (3) and the bottom of the frame (2) are clearance-matched, and the outer wall of the upper part of the detection head (3) and the inner wall of the rotating ring (42) are clearance-matched; A servo motor (5) is fixedly connected to the right side of the bottom of the frame (2); a gear 2 (6) is fixedly connected to the output shaft of the servo motor (5); the gear 2 (6) is clearance-matched with the bottom of the frame (2); the gear 1 (43) and the gear 2 (6) are meshed; a cleaning mechanism (7) is provided at the bottom of the rotating ring (42); The cleaning mechanism (7) comprises a mounting plate (71), the top of the mounting plate (71) is fixedly connected to the left side of the bottom of the rotating ring (42), the bottom of the mounting plate (71) is provided with a rotating plate (72), a hinge buckle (73) is provided between the mounting plate (71) and the rotating plate (72), the mounting plate (71) and the rotating plate (72) are rotatably connected via the hinge buckle (73); the two ends of the hinge buckle (73) are respectively fixedly connected to the bottom of the mounting plate (71) and the top of the rotating plate (72), the rotating plate (72) is L-shaped, the rotating plate (72) and the left side of the mounting plate (71) are respectively fixedly connected with hinge seats (74), the two hinge seats (74) are connected via a micro cylinder (75), the two ends of the micro cylinder (75) are hinged to the two hinge seats (74), the inner wall of the bottom of the rotating plate (72) is fixedly connected with a cleaning cotton (76), and the cleaning cotton (76) is in contact with the outer wall and the bottom wall of the detection head (3).

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