Sample injector of high performance liquid chromatograph

Abstract

The utility model discloses a sample injector of a high performance liquid chromatograph, which relates to the technical field of liquid chromatographs and comprises a base station, a turntable is movably mounted in the middle of the upper side of the base station, and two first fixing mechanisms which are symmetrically distributed left and right are fixedly connected to positions, close to the left side and the right side, of the upper side of the base station; a supporting frame is movably connected to the inner side of the first fixing mechanism in a sleeving mode, a sample injection mechanism is movably installed on the upper side of the supporting frame, and a second fixing mechanism is rotationally connected to the inner side of the rotating disc. According to the high performance liquid chromatograph sample injector, the clamping blocks are driven to move by rotating the rotating seat, so that bottles are clamped by the clamping blocks, the state of the rotating seat is stabilized by the clamping teeth, and a direct moving mode is adopted, so that the fixation is more stable, and unstable fixation caused by a spring mode is avoided; and when the bottle is put into the bottle, a plurality of springs are squeezed together and are difficult to separate.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid chromatograph technical field, especially a kind of high performance liquid chromatograph sample injector. BACKGROUND

[0002] Liquid chromatography is the method for separating components by the different distribution coefficients of separated substances in two phases in solution. The two phases are mobile phase and stationary phase respectively, and the stationary phase in liquid chromatography is usually a substance with adsorption activity; the mobile phase is solvent, and the measured substance is dissolved in solvent and injected into liquid chromatograph, so that different components of the measured substance are separated in different positions on the chromatographic column due to the different binding capacities of different components of the measured substance and the stationary phase, and the specific components of each component of the measured substance are obtained by comparing with standard chromatogram.

[0003] Chinese patent document CN215768414U discloses a high performance liquid chromatograph sample injector, which comprises a base, support rods fixedly installed on the top surface of the base, a top plate fixedly installed on the top surface of the support rods, a conveying device fixedly installed on the inner top surface of the top plate, a clamping device arranged below the conveying device, a needle fixedly installed on one side of the bottom surface of the top plate, a cavity formed in the inside of the base, a drive motor fixedly installed on the inner bottom surface of the cavity, and a storage tray fixedly installed on the output end of the drive motor. In the utility model, the installation plate, the limiting springs, the movable blocks, the protective pads and the pulleys are used in cooperation, the movable blocks are driven to approach each other by the limiting springs, so that the bottle can be clamped, the possibility of shaking of the bottle is reduced, the stability of the bottle during rotation is improved, and the risk of clamping the bottle by the movable blocks is reduced due to the arrangement of the non-slip pads.

[0004] The existing technology has the following problems:

[0005] The spring is directly used on the sample injector to fix the bottle, but this form is difficult to fix the bottle stably, because the spring has elasticity. If the compression amount of the spring after fixing is too large, it is difficult to put the bottle into the position between the springs. If the compression amount is insufficient, the spring may shrink during rotation, resulting in unstable fixation of the bottle. UTILITY MODEL CONTENTS

[0006] The utility model provides a kind of high performance liquid chromatograph sample injector to solve the problems in the above background.

[0007] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0008] A high performance liquid chromatograph sample injector, including a base, the upper middle of the base is movably mounted with a turntable, the upper side of the base is fixedly connected with two first fixing mechanisms which are symmetrically distributed on the left and right sides, the inner side of the first fixing mechanism is movably sleeved with a support frame, the upper side of the support frame is movably mounted with a sample injection mechanism, the inner side of the turntable is rotationally connected with a second fixing mechanism.

[0009] The second fixing mechanism includes a rotating seat, the inner side of the lower surface of the rotating seat is provided with a plurality of annularly distributed arc grooves, and the inner side of the plurality of arc grooves is slidably connected with a clamping block.

[0010] Preferably, the first fixing mechanism includes a fixed seat, the inner side of the fixed seat is movably sleeved with a support frame, the inner side of the side wall of the fixed seat is movably sleeved with a plurality of annularly distributed balls, the outer side of the ball is movably sleeved in the ball groove which is provided on the outer side of the support frame near the left and right sides, and the outer side of the fixed seat is rotationally connected with a rotating sleeve.

[0011] Preferably, the first spring is movably mounted between the inner side of the rotating sleeve and the outer side of the fixed seat.

[0012] Preferably, the outer side of the rotating sleeve is movably sleeved with a limiting sleeve, a plurality of annularly distributed limiting grooves are provided on the outer side of the fixed seat near the upper side, and the inner side of the protrusion of the limiting sleeve near the upper side is slidably connected to the inner side of the limiting groove.

[0013] Preferably, the rotating ring is rotationally connected to the outer side of the rotating seat near the upper side, the lower side of the rotating ring is fixedly connected with a gear ring, one side of the gear ring near the upper middle of the turntable is meshingly connected with a pawl, the side of the pawl away from the rotating seat is fixedly connected with a telescopic rod, and the outer side of the telescopic rod is movably sleeved with a second spring.

[0014] Preferably, the third spring is movably mounted between the gear ring and the outer side of the rotating seat.

[0015] Preferably, the side of each of the plurality of clamping blocks close to each other is fixedly connected with a rubber pad.

[0016] Due to the adoption of the above technical scheme, the technical progress achieved by the present application relative to the prior art is:

[0017] 1. The utility model provides a high efficiency liquid chromatograph sample injector adopts the cooperation of second fixed establishment, rotating seat, clamping block, arc groove, gear ring, pawl, telescopic link, second spring, third spring and rotating ring, through rotating rotating seat, drive multiple clamping blocks to move, make clamping block hold the bottle, the state of pawl to rotating seat is stable, this kind adopts the form of direct movement, make fixed more stable, avoid the problem that multiple springs are pressed together and are difficult to separate when putting in the bottle.

[0018] 2. The utility model provides a high efficiency liquid chromatograph sample injector adopts the cooperation of first fixed establishment, fixed seat, ball, rotating sleeve, first spring, dislocation groove, limit sleeve, limit groove and support frame, through rotating limit sleeve, can directly insert support frame the inside of fixed seat, reset limit sleeve, support frame is fixed, reverse operation makes support frame can be taken out from the inside of fixed seat fast, cause support frame can be installed and disassembled from the base quick, avoid when saving the part of component of this sample injector protrude, lead to the problem of difficult to save. ACCURACY OF DRAWINGS

[0019] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0020] Figure 2 It is the partial section three-dimensional structure schematic diagram of first fixed establishment part of the utility model;

[0021] Figure 3 It is the partial section three-dimensional structure schematic diagram of rotating disc part of the utility model;

[0022] Figure 4 It is the partial section three-dimensional structure schematic diagram of second fixed establishment part of the utility model;

[0023] Figure 5 It is the utility model Figure 4 Enlarged structure schematic diagram of A part in the utility model.

[0024] In the drawing: 1, base; 2, rotating disc; 3, first fixed establishment; 31, fixed seat; 32, ball; 33, rotating sleeve; 34, first spring; 35, dislocation groove; 36, limit sleeve; 37, limit groove; 4, support frame; 5, sample mechanism; 6, second fixed establishment; 61, rotating seat; 62, clamping block; 63, arc groove; 64, gear ring; 65, pawl; 66, telescopic link; 67, second spring; 68, third spring; 69, rotating ring. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific implementation manners.

[0026] As Figures 1-5 shown, a high-performance liquid chromatograph sampler includes a base 1, a rotating disc 2 movably mounted on the upper middle part of the base 1, two first fixing mechanisms 3 symmetrically distributed and fixedly connected to the upper side of the base 1 near the left and right sides, a support frame 4 movably sleeved on the inner side of the first fixing mechanism 3, a sampling mechanism 5 movably mounted on the upper side of the support frame 4, and a second fixing mechanism 6 rotationally connected to the inner side of the rotating disc 2.

[0027] The second fixing mechanism 6 includes a rotating seat 61, and a plurality of arc grooves 63 symmetrically distributed and formed in the inner lower surface of the rotating seat 61. A clamping block 62 is slidably connected to the inner side of each arc groove 63.

[0028] It should be noted that the base 1 is provided with a motor for driving the rotating disc 2 to rotate. The sampling mechanism 5 has the same components as the structure with the same function in the reference case. The inner bottom of the rotating disc 2 is provided with a straight groove, and the lower side of the clamping block 62 is also slidably connected to the straight groove. When the rotating seat 61 rotates, the clamping block 62 slides in the arc grooves 63 and the straight groove, so that the clamping blocks 62 move closer to or away from each other, thereby clamping the bottle.

[0029] As Figure 2 shown, the first fixing mechanism 3 includes a fixed seat 31, a support frame 4 movably sleeved on the inner side of the fixed seat 31, a plurality of ball bearings 32 movably sleeved on the inner side of the sidewall of the fixed seat 31, the outer side of the ball bearings 32 movably sleeved in the ball grooves formed on the outer side of the support frame 4 near the left and right sides, a rotating sleeve 33 rotationally connected to the outer side of the fixed seat 31, and a plurality of dislocation grooves 35 symmetrically distributed and formed in the inner side of the rotating sleeve 33.

[0030] It should be noted that when the dislocation grooves 35 and the ball bearings 32 are misaligned, the ball bearings 32 cannot move, thereby fixing the support frame 4 and preventing it from being separated from the inner side of the fixed seat 31. Rotating the rotating sleeve 33 aligns the dislocation grooves 35 with the ball bearings 32, allowing the ball bearings 32 to move and enabling the support frame 4 to be separated from the inner side of the fixed seat 31.

[0031] As Figure 2 shown, a first spring 34 is movably mounted between the inner side of the rotating sleeve 33 and the outer side of the fixed seat 31.

[0032] It should be noted that the first spring 34 is a torsion spring, which prevents the rotating sleeve 33 from rotating on its own without human intervention.

[0033] As Figure 2As shown, the outer side of the rotating sleeve 33 movably sleeves the limiting sleeve 36, and the outer side of the fixed seat 31 close to the upper side is provided with a plurality of annular limiting grooves 37, and the inner side of the limiting sleeve 36 close to the upper side is slidably connected to the inner side of the limiting groove 37.

[0034] It should be noted that the rotating sleeve 33 cannot rotate relative to the up-down movement on the inner side of the limiting sleeve 36, the limiting groove 37 is L-shaped, and the limiting groove 37 limits the limiting sleeve 36, so that the limiting sleeve 36 drives the rotating sleeve 33 to rotate, and the dislocation groove 35 is aligned with the ball 32, the limiting sleeve 36 is pushed down, and the rotating sleeve 33 cannot be reset.

[0035] As shown in the figure, Figure 5 The outer side of the rotating seat 61 close to the upper side is rotatably connected with a rotating ring 69, the lower side of the rotating ring 69 is fixedly connected with a gear ring 64, one side of the gear ring 64 close to the upper middle part of the rotating disc 2 is meshingly connected with a clamping tooth 65, the side of the clamping tooth 65 away from the rotating seat 61 is fixedly connected with an extension rod 66, and the outer side of the extension rod 66 movably sleeves a second spring 67.

[0036] It should be noted that the rotating ring 69 drives the rotating seat 61 to rotate, the gear ring 64 rotates when the rotating ring 69 rotates, the gear ring 64 and the clamping tooth 65 are meshed, and the second spring 67 pushes the clamping tooth 65, so that the gear ring 64 cannot rotate by itself without human operation.

[0037] As shown in the figure, Figure 5 The third spring 68 is movably installed between the outer side of the gear ring 64 and the rotating seat 61.

[0038] It should be noted that the third spring 68 is a torsion spring, which is used to stabilize the state between the rotating ring 69 and the rotating seat 61, and after the clamping block 62 and the bottle are clamped, the rotating ring 69 can continue to rotate a small distance, so that the clamping of the clamping block 62 on the bottle is more stable.

[0039] As shown in the figure, Figure 4 The side close to each other of the plurality of clamping blocks 62 is fixedly connected with a rubber pad.

[0040] It should be noted that the rubber pad is used to avoid rigid contact between the clamping block 62 and the bottle, so as to cause damage to the surface of the bottle by the clamping block 62.

[0041] The utility model discloses a working principle: first, the inside bottom of carousel 2 is equipped with straight flute, and the downside of clamping block 62 is also slidably connected in the straight flute, so that when rotating seat 61 rotates, clamping block 62 slides in arc groove 63 and straight flute, so that clamping block 62 is close to each other or separates, and clamping block 62 clamps the bottle, and rotating ring 69 drives rotating seat 61 to rotate, and when rotating ring 69 rotates, gear ring 64 rotates, and gear ring 64 and catch 65 are engaged, and catch 65 is pushed by second spring 67, so that gear ring 64 cannot rotate automatically under non-human operation, and third spring 68 is torsional spring, and is used for stabilizing the state between rotating ring 69 and rotating seat 61, and at the same time after clamping block 62 and clamping the bottle, rotating ring 69 can continue to rotate a small distance, so that clamping block 62 clamps the bottle more stably, rotating rotating seat 61 drives multiple clamping blocks 62 to move, so that clamping block 62 clamps the bottle, and catch 65 stabilizes the state of rotating seat 61, and this mode adopts direct moving form, so that the fixing is more stable, and the problem that multiple springs are crowded together and difficult to separate when the bottle is put in is avoided, finally, when dislocation groove 35 and ball 32 are staggered, ball 32 cannot move, so that ball 32 fixes support frame 4, so that support frame 4 cannot separate from the inside of fixed seat 31, rotating sleeve 33 makes dislocation groove 35 align with ball 32, so that ball 32 can move, so that support frame 4 can separate from the inside of fixed seat 31, first spring 34 is torsional spring, avoiding rotating sleeve 33 from rotating automatically under non-human operation, and by rotating limiting sleeve 36, support frame 4 can be directly inserted into the inside of fixed seat 31, and resetting limiting sleeve 36 fixes support frame 4, and reverse operation makes support frame 4 can be quickly taken out from the inside of fixed seat 31, so that support frame 4 can be quickly installed and disassembled from base 1, avoiding the problem that part components protrude when saving the sample feeder, leading to the difficulty of saving.

[0042] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. The skilled person in the art should understand that the utility model is not limited by the above examples, and the above examples and the description in the specification only illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high performance liquid chromatograph injector comprising a base (1) characterised in that: The upper middle part of the base (1) is movably provided with a rotating disc (2), the upper side of the base (1) is fixedly connected with two first fixing mechanisms (3) which are symmetrically distributed left and right, the inner side of the first fixing mechanism (3) is movably sleeved with a supporting frame (4), the upper side of the supporting frame (4) is movably provided with a sample feeding mechanism (5), and the inner side of the rotating disc (2) is rotatably connected with a second fixing mechanism (6). The second fixing mechanism (6) comprises a rotating seat (61), and the inner side of the lower surface of the rotating seat (61) is provided with a plurality of annularly distributed arc grooves (63), and the inner side of each of the arc grooves (63) is slidably connected with a clamping block (62).

2. The high performance liquid chromatograph sample injector of claim 1 wherein: The first fixing mechanism (3) comprises a fixed seat (31), the inner side of the fixed seat (31) is movably sleeved with a supporting frame (4), the inner side of the side wall of the fixed seat (31) is movably sleeved with a plurality of annularly distributed balls (32), the outer side of the ball (32) is movably sleeved in the ball groove which is formed on the outer side of the supporting frame (4) and is close to the left and right sides, the outer side of the fixed seat (31) is rotatably connected with a rotating sleeve (33), and the inner side of the rotating sleeve (33) is provided with a plurality of annularly distributed dislocation grooves (35).

3. The high performance liquid chromatograph injector of claim 2 wherein: The inner side of the rotating sleeve (33) and the outer side of the fixed seat (31) are movably provided with a first spring (34).

4. The high performance liquid chromatograph sample injector of claim 2 wherein: The outer side of the rotating sleeve (33) is movably sleeved with a limiting sleeve (36), a plurality of annularly distributed limiting grooves (37) are formed on the outer side of the fixed seat (31) and are close to the upper side, and the inner side of the limiting sleeve (36) is close to the upper side The protrusion is slidably connected to the inner side of the limiting groove (37).

5. The high performance liquid chromatography injector of claim 1, wherein: The outer side of the rotating seat (61) is rotatably connected with a rotating ring (69) which is close to the upper side, the lower side of the rotating ring (69) is fixedly connected with a gear ring (64), one side of the gear ring (64) which is close to the upper middle part of the rotating disc (2) is meshingly connected with a clamping tooth (65), the side of the clamping tooth (65) away from the rotating seat (61) is fixedly connected with a telescopic rod (66), and the outer side of the telescopic rod (66) is movably sleeved with a second spring (67).

6. The high performance liquid chromatograph injector of claim 5 wherein: The third spring (68) is movably installed between the outer side of the gear ring (64) and the rotating seat (61).

7. The high performance liquid chromatography injector of claim 1, wherein: The side close to each other of the plurality of clamping blocks (62) is fixedly connected with a rubber pad.

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