Novel fixed turntable for automatic sample injection of liquid chromatograph

Abstract

The utility model discloses a novel fixed turntable for automatic sample injection of a liquid chromatograph, and particularly relates to the technical field of liquid chromatographs, the novel fixed turntable comprises a turntable body arranged at the bottom of an automatic sample injection device of the liquid chromatograph, and a motor for driving the turntable body to rotate is arranged at the bottom of the automatic sample injection device of the liquid chromatograph. The end of an output shaft of the motor is fixedly connected to the middle of the rotating disc body, a plurality of through grooves are annularly formed in the rotating disc body at equal intervals, a rotating rod is inserted into the middle of the rotating disc body in the vertical direction, and the top end of the rotating rod extends to the position above the rotating disc body and is fixedly connected with a hand wheel. A gear is fixedly connected to the position, below the hand wheel, of the outer portion of the rotating rod, and a locking mechanism for limiting the gear is connected to the top end of the rotating disc body. According to the utility model, a structure for clamping, fixing and loosening the test tube is designed on the turntable, the structural design is simple, the operation is easy, and the test tube placed on the turntable can be clamped, fixed and loosened at the same time at one time.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid chromatograph technical field more specifically, the utility model relates to a kind of novel fixed carousel for automatic sampling of liquid chromatograph. BACKGROUND

[0002] Liquid chromatograph is the instrument that is separated first to mixture using the difference of distribution ratio of mixture between liquid-solid or two immiscible liquids, and then analyzed and identified. According to the liquid or solid of stationary phase, it is also divided into liquid-liquid chromatography, which consists of high-pressure liquid pump, sample introduction system, temperature control system, chromatographic column, detector, signal recording system and other parts. Compared with classical liquid column chromatography device, it has the characteristics of high efficiency, rapidness and sensitivity.

[0003] Through retrieval, the Chinese patent with publication number CN214953275U discloses an automatic sampling device for liquid chromatograph, which discloses the position setting and use mode of carousel structure on the automatic sampling device for liquid chromatograph.

[0004] In the above-mentioned patent, a through slot is left on the carousel for placing test tubes. After placing the test tubes, the spring is used to achieve clamping and fixing of the test tubes. However, in actual use, the rotating carousel itself will generate a rotating force, causing the spring to shake. Therefore, it is necessary to improve the fixing and clamping structure of the test tubes on the carousel. UTILITY MODEL CONTENT

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a novel fixed carousel for automatic sampling of liquid chromatograph.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a novel fixed carousel for automatic sampling of liquid chromatograph, comprising a carousel body installed at the bottom of an automatic sampling device for liquid chromatograph. The bottom of the automatic sampling device for liquid chromatograph is provided with a motor for driving the carousel body to rotate. The output shaft end of the motor is fixedly connected to the middle part of the carousel body. The inside of the carousel body is provided with a plurality of through slots arranged at equal intervals in a ring shape. A rotating rod is inserted into the middle part of the carousel body in a vertical direction. A hand wheel is fixedly connected to the top end of the rotating rod extending above the carousel body. A gear is fixedly connected to the outside of the rotating rod below the hand wheel. A locking mechanism is connected to the top end of the carousel body to limit the gear. A rotating block is fixedly connected to the bottom end of the rotating rod inside the carousel body. The outer wall of the rotating block is provided with a plurality of connecting rods arranged at equal intervals in a ring shape, the same as the number of through slots. The end of each connecting rod is fixedly connected to an arc-shaped rod. The end of each arc-shaped rod is fixedly connected to an arc-shaped clamping plate inside one through slot.

[0007] As a further improvement to the technical solution of this utility model, a bearing is installed on the top of the turntable body at the external position corresponding to the rotating rod.

[0008] As a further improvement to the technical solution of this utility model, the top end of the rotating rod is welded and fixed to the bottom of the handwheel, and the gear is fixedly connected to the rotating rod by screws.

[0009] As a further improvement to the technical solution of this utility model, the locking mechanism includes a fixed shell disposed on the outside of the gear, a fixed rod fixedly connected between the bottom end of the fixed shell and the top of the turntable body, and a telescopic rod connected to the inner side of the end of the fixed shell near the gear, and a locking block that engages with the outer teeth of the gear is fixedly connected to the end of the telescopic rod.

[0010] As a further improvement to the technical solution of this utility model, a toggle rod is fixedly connected to the top of the telescopic rod near the toothed block, and a movable plate is fixedly connected to the end of the telescopic rod inside the fixed shell. A telescopic cavity is provided in the horizontal direction inside the fixed shell corresponding to the outside of the movable plate, and a spring is connected between the end of the movable plate and the inner wall of the telescopic cavity.

[0011] As a further improvement to the technical solution of this utility model, the turntable body is provided with a circular cavity for mounting the rotating block, and the turntable body is provided with a first cavity and a second cavity respectively in the direction of the movement trajectory of each connecting rod and the arc rod, and the second cavity is connected to the first cavity.

[0012] As a further improvement to the technical solution of this utility model, the end of the arc-shaped rod is welded and fixed to the arc-shaped card plate.

[0013] The beneficial effects of this utility model are:

[0014] This invention features a structure on a turntable for clamping and releasing test tubes. The structure is simple and easy to operate, enabling simultaneous clamping, fixing, and releasing of test tubes placed on the turntable in one operation. During operation, first, push the lever on the locking mechanism to extend and retract the telescopic rod inside the fixed housing, facilitating adjustment of the distance between the clamping block and the gear. When clamping and fixing the test tube, pull the lever to move the clamping block away from the gear. At this time, turning the handwheel drives the rotating rod, gear, and rotating block to rotate. The rotating block's rotation drives the connecting rod and arc-shaped rod to rotate, pushing the arc-shaped clamping plate inside the slot to clamp and lock the test tube. Then, release the lever; under the action of the spring, the telescopic rod extends and pushes the clamping block to lock the gear, maintaining the test tube's fixed position. When removing the test tube, similarly pull the lever to move the clamping block away from the gear. Then, turn the handwheel in the opposite direction to disengage the arc-shaped clamping plate from the test tube. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation structure of the rotary table body of this utility model on the automatic sample injection device of a liquid chromatograph.

[0016] Figure 2 This is a schematic diagram of the structure of the turntable body in this utility model.

[0017] Figure 3 This is a cross-sectional view of the turntable body in this utility model.

[0018] Figure 4 This is a cross-sectional view of the locking mechanism in this utility model.

[0019] The attached figures are labeled as follows: 1. Turntable body; 2. Through groove; 3. Rotating rod; 4. Handwheel; 5. Gear; 6. Fixed shell; 7. Telescopic rod; 8. Gear block; 9. Actuating rod; 10. Fixed rod; 11. Movable plate; 12. Telescopic cavity; 13. Spring; 14. Rotating block; 15. Connecting rod; 16. Arc rod; 17. Arc-shaped clamping plate; 18. First cavity; 19. Second cavity. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] As attached Figures 1-4 The illustration shows a novel fixed rotary table for automatic sample injection in a liquid chromatograph, comprising a rotary table body 1 mounted at the bottom of the automatic sample injection device of the liquid chromatograph. A motor for driving the rotary table body 1 to rotate is mounted at the bottom of the automatic sample injection device. The output shaft of the motor is fixedly connected to the middle of the rotary table body 1. The interior of the rotary table body 1 has a plurality of annularly spaced through slots 2. A rotating rod 3 is inserted vertically into the middle of the rotary table body 1, and the top end of the rotating rod 3 extends to the top of the rotary table body 1 and is fixed thereon. A handwheel 4 is connected, and a gear 5 is fixedly connected to the outside of the rotating rod 3 below the handwheel 4. A locking mechanism for limiting the gear 5 is connected to the top of the turntable body 1. A rotating block 14 is fixedly connected to the bottom of the rotating rod 3 inside the turntable body 1. The outer wall of the rotating block 14 is connected in a ring with the same number of connecting rods 15 as the through slot 2. An arc-shaped rod 16 is fixedly connected to the end of each connecting rod 15. An arc-shaped clamping plate 17 is fixedly connected to the end of each arc-shaped rod 16 inside a through slot 2.

[0022] As attached Figures 1-2As shown, a bearing is installed on the top of the turntable body 1 at the external position corresponding to the rotating rod 3, which facilitates the stable rotation of the rotating rod 3 on the turntable body 1.

[0023] As attached Figures 1-2 As shown, the top of the rotating rod 3 is welded and fixed to the bottom of the handwheel 4, and the gear 5 is fixed to the rotating rod 3 by screws, which facilitates the connection and fixation between the handwheel 4 and the gear 5 and the rotating rod 3.

[0024] As attached Figures 1-2 and attached Figure 4 As shown, the locking mechanism includes a fixed housing 6 disposed outside the gear 5. A fixed rod 10 is fixedly connected between the bottom end of the fixed housing 6 and the top of the turntable body 1. A telescopic rod 7 is connected to the inner side of the fixed housing 6 near the gear 5. A locking block 8 that engages with the external teeth of the gear 5 is fixedly connected to the end of the telescopic rod 7. A toggle rod 9 is fixedly connected to the top end of the telescopic rod 7 near the locking block 8. A movable plate 11 is fixedly connected to the end of the telescopic rod 7 inside the fixed housing 6. The interior of the fixed housing 6 corresponds to the exterior of the movable plate 11 along the waterline. A telescopic cavity 12 is provided in the horizontal direction. A spring 13 is connected between the end of the movable plate 11 and the inner wall of the telescopic cavity 12. The locking mechanism facilitates the extension and retraction of the telescopic rod 7 inside the fixed shell 6 by pushing the actuating rod 9 during use, which makes it easy to adjust the distance between the locking block 8 and the gear 5. When it is necessary to rotate the rotating rod 3, the actuating rod 9 is pulled to control the locking block 8 to move away from the gear 5. After rotating to the desired position, the actuating rod 9 is released. Under the action of the spring 13, the telescopic rod 7 extends to push the locking block 8 to lock the gear 5.

[0025] As attached Figure 3 As shown, the turntable body 1 has a circular cavity inside for mounting the rotating block 14. The turntable body 1 also has a first cavity 18 and a second cavity 19 located in the direction of the movement trajectory of each connecting rod 15 and the arc rod 16. The second cavity 19 is connected to the first cavity 18, so that when in use, the rotating rod 3 can be rotated by turning the handwheel 4. The rotating rod 3 drives the rotating block 14 inside the turntable body 1 to rotate, which in turn drives the connecting rod 15 and the arc rod 16 to rotate. The arc rod 16 pushes the arc-shaped clamping plate 17 to move inside the through groove 2 to clamp and lock the test tube placed inside.

[0026] As attached Figure 3 As shown, the end of the arc-shaped rod 16 is welded and fixed to the arc-shaped clamping plate 17, which facilitates the connection and fixation between the arc-shaped clamping plate 17 and the arc-shaped rod 16.

[0027] Working principle: This utility model designs a novel fixed rotary table for automatic sample injection in a liquid chromatograph. The specific structure is shown in the attached instruction manual. Figures 1-4As shown, in this technical solution, the turntable body 1 is provided with a through groove 2 for placing test tubes. After the test tubes are placed, a structure for clamping, fixing, and releasing the test tubes is also designed. In specific operation, first push the lever 9 on the locking mechanism to drive the telescopic rod 7 to extend and retract inside the fixed shell 6, which facilitates the adjustment of the distance between the toothed block 8 and the gear 5. When it is necessary to rotate the rotating rod 3, pull the lever 9 to control the toothed block 8 to move away from the gear 5. At this time, turn the handwheel 4 to drive the rotating rod 3, the gear 5, and the rotating block 14 to rotate. When the moving block 14 rotates, it can drive the connecting rod 15 and the arc rod 16 to rotate. The arc rod 16 pushes the arc-shaped clamping plate 17 to move inside the through groove 2 to clamp and lock the test tube placed inside. Then, the lever 9 is released. Under the action of the spring 13, the telescopic rod 7 extends to push the locking tooth block 8 to lock the gear 5, and the test tube is kept in a fixed position. When it is necessary to remove the test tube, the lever 9 is pulled to drive the locking tooth block 8 away from the gear 5. At this time, the handwheel 4 is rotated in the opposite direction to drive the arc-shaped clamping plate 17 to disengage from the test tube.

[0028] It should be noted that for the parts not disclosed in this solution, such as the structure of the automatic sample feeder of the liquid chromatograph, please refer to the patent documents cited in the background art. This application only involves improvements to the turntable, and other parts that are not within the scope of protection of this application will not be elaborated.

[0029] In the accompanying drawings of the embodiments disclosed in this utility model, only the structures involved in the embodiments of this utility model are shown. Other structures can be referred to with ordinary design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel fixed rotary table for automatic sample injection in a liquid chromatograph, comprising a rotary table body (1) mounted on the bottom of an automatic sample injection device for a liquid chromatograph, wherein a motor for driving the rotary table body (1) to rotate is mounted on the bottom of the automatic sample injection device for a liquid chromatograph, and the output shaft end of the motor is fixedly connected to the middle of the rotary table body (1), characterized in that: The turntable body (1) has several through slots (2) arranged in a ring at equal intervals inside. A rotating rod (3) is inserted vertically in the middle of the turntable body (1). A handwheel (4) is fixedly connected to the top of the rotating rod (3) above the turntable body (1). A gear (5) is fixedly connected to the outside of the rotating rod (3) below the handwheel (4). A locking mechanism for limiting the gear (5) is connected to the top of the turntable body (1). A rotating block (14) is fixedly connected to the bottom of the rotating rod (3) inside the turntable body (1). The outer wall of the rotating block (14) is connected with the same number of connecting rods (15) as the through slots (2) in a ring at equal intervals. An arc-shaped rod (16) is fixedly connected to the end of each connecting rod (15). An arc-shaped plate (17) is fixedly connected to the end of each arc-shaped rod (16) inside a through slot (2).

2. The novel fixed rotary table for automatic sample injection in a liquid chromatograph according to claim 1, characterized in that: A bearing is installed on the top of the turntable body (1) at the external position corresponding to the rotating rod (3).

3. The novel fixed rotary table for automatic sample injection in a liquid chromatograph according to claim 1, characterized in that: The top of the rotating rod (3) is welded and fixed to the bottom of the handwheel (4), and the gear (5) is fixedly connected to the rotating rod (3) by screws.

4. The novel fixed rotary table for automatic sample injection in a liquid chromatograph according to claim 1, characterized in that: The locking mechanism includes a fixed shell (6) disposed on the outside of the gear (5), a fixed rod (10) is fixedly connected between the bottom end of the fixed shell (6) and the top of the turntable body (1), and a telescopic rod (7) is connected to the inner side of the end of the fixed shell (6) near the gear (5), and a tooth block (8) that engages with the outer tooth of the gear (5) is fixedly connected to the end of the telescopic rod (7).

5. The novel fixed rotary table for automatic sample injection in a liquid chromatograph according to claim 4, characterized in that: A lever (9) is fixedly connected to the top of the telescopic rod (7) near the toothed block (8), and a movable plate (11) is fixedly connected to the end of the telescopic rod (7) inside the fixed shell (6). A telescopic cavity (12) is provided in the horizontal direction inside the fixed shell (6) corresponding to the outside of the movable plate (11). A spring (13) is connected between the end of the movable plate (11) and the inner wall of the telescopic cavity (12).

6. The novel fixed rotary table for automatic sample injection in a liquid chromatograph according to claim 1, characterized in that: The turntable body (1) has a circular cavity for mounting the rotating block (14) inside. The turntable body (1) also has a first cavity (18) and a second cavity (19) respectively located in the direction of the movement trajectory of each connecting rod (15) and arc rod (16). The second cavity (19) is connected to the first cavity (18).

7. The novel fixed rotary table for automatic sample injection in a liquid chromatograph according to claim 1, characterized in that: The end of the arc-shaped rod (16) is welded and fixed to the arc-shaped clamping plate (17).

Images