Positive pressure sample loading device of full-automatic sample injector

Abstract

The utility model discloses a full-automatic positive pressure sample loading device of a sample injector, which comprises a sealing module and a lifting module, when the lifting module conveys a container to a specified sealing position by a lead screw lifting device, the sealing module sequentially applies three groups of elastic forces with different strengths through full-automatic positive pressure sample loading operation, so that the container is loaded to the specified sealing position; capillary column samples are loaded and act on corresponding containers step by step, so that the functions that the bottle openings of the containers are centered, the rubber plugs are punctured by the hollow needles and the capillaries of the hollow needles directly extend into liquid are realized. According to the full-automatic positive-pressure sample loading device, the sample loading speed is increased through full-automatic positive-pressure sample loading, the capillary column is efficiently matched for sample injection, and only the capillary tube is in direct contact with liquid in the sample loading process, so that the capillary tube is convenient to clean.

Description

Technical Field

[0001] The utility model relates to a machine for carrying out sample injection processing on a capillary column, in particular to a full-automatic sample injector positive pressure sample loading device, belonging to the technical field of sample injectors. Background Art

[0002] Injectors are devices that can quantitatively deliver analytical samples into chromatographic columns in chromatographic systems. They are widely used in the fields of petroleum, chemistry, agricultural chemistry, biochemistry, medicine, health, food, etc. Common negative pressure injection systems use syringe pumps for injection, which is not suitable for capillary column injection. In addition, the injection speed is slow, the cannula hole is easily blocked, and the cleaning operation is complicated, and the maintenance and replacement are cumbersome.

[0003] Therefore, it is necessary to propose a positive pressure sample loading device for a fully automatic sample injector to improve the sample loading applicability performance of the sample injector. Summary of the invention

[0004] The purpose of the utility model is to solve the above problems and provide a full-automatic sample injector positive pressure sample loading device to overcome the problems of slow injection speed, easy clogging, complicated cleaning operation and cumbersome maintenance and replacement, so as to improve the performance.

[0005] The technical solution of the utility model is: a fully automatic sample injector positive pressure loading device, including a lower plate support and an upper plate support arranged in parallel with each other in the upper and lower directions, and also including two support columns, the two support columns are respectively connected to the outer sides of the lower plate support and the upper plate support to form a frame body, and a lifting module and a sealing module are provided on the frame body.

[0006] On the one hand, the lifting module is fixedly connected to the die table arranged on the lower plate support, and the central part of the lifting module is transmission-connected with a driving screw, and a driven wheel is installed on the first end of the driving screw, and the driven wheel and a driving wheel are mutually sleeved through a transmission belt, and the driving wheel is installed on the output shaft of the driving motor, and a positioning seat for fixing the container is provided on the die table.

[0007] On the other hand, the sealing module is connected to a mounting plate for upward and downward movement through two symmetrically arranged force transmission rods, the mounting plate is fixedly connected to the upper plate support, and a first connecting pipe is provided inside the mounting plate located at the upper position, and a silicone column tube is also provided on the sealing module, the bottom end of the silicone column tube passes through the sealing module and is connected to a compression sealing head, and the compression sealing head is connected to the interior of the silicone column tube and is provided with a second connecting pipe.

[0008] Furthermore, in the above-mentioned positive pressure sample loading device for the fully automatic sample injector, a positioning protrusion for limiting the position of the first connecting tube is provided at the bottom end of the mounting plate.

[0009] Furthermore, the above-mentioned fully automatic sample injector positive pressure sample loading device, wherein: the compression seal head is sleeved with a second spring for transmitting pressure

[0010] Furthermore, in the above-mentioned positive pressure sample loading device for the fully automatic sample injector, the force transmission rods are all sleeved with a first spring for transmitting pressure.

[0011] Furthermore, in the above-mentioned fully automatic sample injector positive pressure loading device, the first end of the force transmission rod is embedded in the mounting plate through a self-locking nail, and a fixed cross pin is transversely penetrated through the self-locking nail; the second end of the force transmission rod is connected with an adjustment screw.

[0012] Furthermore, in the above-mentioned fully automatic sample injector positive pressure loading device, two driven screws are symmetrically arranged on the lifting module based on the center line of the active screw, and a movable sleeve is sleeved on one of the driven screws.

[0013] Furthermore, the above-mentioned fully automatic sample injector positive pressure loading device, wherein: the limit rod is fixed on the lower plate support and is arranged adjacent to the lifting module, and a positioning block is fixed on the upper part of the limit rod, and a sliding block is slidably connected to the lower part of the limit rod, and the sliding block is slidably matched with the driven screw rod up and down through a movable tube sleeve.

[0014] Furthermore, in the above-mentioned fully automatic sample injector positive pressure sample loading device, the first connecting tube and the second connecting tube are arranged in vertical alignment, and the calibers of the first connecting tube and the second connecting tube are matched with the caliber of the capillary.

[0015] Compared with the prior art, after adopting the technical solution of the utility model, when the lifting module sends the container to the designated sealing position by the screw lifting device, the sealing module applies three sets of elastic forces of different strengths in turn through the fully automatic positive pressure loading operation, and the capillary column loading is applied to the corresponding container in steps, realizing the functions of centering the container mouth, piercing the rubber stopper with a hollow needle, and directly extending the capillary into the liquid. In addition, the fully automatic positive pressure loading speed of this case is fast, and it efficiently matches the capillary column injection. In addition, the part that directly contacts the liquid during the loading process is only the capillary, making it easy to clean; in addition, in the case of blockage, this case can be solved by replacing the fast capillary as a consumable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the utility model;

[0017] Figure 2 It is a side view of the utility model;

[0018] Figure 3 It is a schematic cross-sectional view of the utility model along the AA direction;

[0019] Figure 4 It is a cross-sectional schematic diagram of the utility model along the BB direction;

[0020] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at point C.

[0021] The meanings of the reference numerals in the figure are as follows: 1-lower plate support, 2-upper plate support, 3-support column, 4-lifting module, 5-active screw, 6-driven screw, 7-movable sleeve, 8-driving motor, 9-active wheel, 10-transmission belt, 11-driven wheel, 12-limiting rod, 13-sliding block, 14-positioning block, 15-mounting plate, 16-calibration protrusion, 17-silicone column tube, 18-sealing module, 19-force transmission rod, 191-self-locking nail, 192-fixed cross pin, 20-first spring, 21-adjusting screw, 22-die table, 23-positioning seat, 24-first connecting plug, 25-second connecting plug, 26-compression sealing head, 27-second spring, 28-capillary, 29-container. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further described below in conjunction with the accompanying drawings to make it easier to understand and grasp. The components involved, such as the driving motor 8, the driving wheel 9, the transmission belt 10, the driven wheel 11, the spring, the adjustment screw 21 and the connecting plug, are all commonly used by ordinary technicians in the field, and there is no special requirement for them in this case.

[0023] like Figure 1-2 As shown, the utility model is a positive pressure loading device for a fully automatic sample injector, comprising a lower plate support 1 and an upper plate support 2 which are arranged in parallel with each other in the upper and lower directions, and also comprising two support columns 3, wherein the two support columns 3 are respectively connected to the outer sides of the lower plate support 1 and the upper plate support 2 to form a frame body, and a lifting module 4 and a sealing module 18 are provided on the frame body.

[0024] like Figure 3 to Figure 5As shown, according to the technical solution of the utility model, the lifting module 4 is fixedly connected to the die table 22 arranged on the lower plate support 1, and the central part of the lifting module 4 is transmission-connected with an active screw 5, and the first end of the active screw 5 is installed with a driven wheel 11, and the driven wheel 11 and a driving wheel 9 are mutually sleeved through a transmission belt 10, and the driving wheel 9 is installed on the output shaft of the driving motor 8, and the die table 22 is provided with a positioning seat 23 for fixing the container 19; the sealing module 18 is connected to a mounting plate 15 for upward and downward movement through two symmetrically arranged force transmission rods 19, and the mounting plate 15 is fixedly connected to the upper plate support 2, and a first connecting plug 24 is provided inside the mounting plate 15 located at the upper position, and a silicone column tube 17 is also provided on the sealing module 18, and the bottom end of the silicone column tube 17 passes through the sealing module 18 and is connected with a compression sealing head 26, and the compression sealing head 26 is connected to the inside of the silicone column tube 17 and is provided with a second connecting plug 25.

[0025] The first connecting tube 24 and the second connecting tube 25 are arranged in vertical alignment, and the calibers of the first connecting tube 24 and the second connecting tube 25 are matched with the caliber of the capillary tube 27 .

[0026] Preferably, in the above structure: two driven screws 6 are symmetrically arranged on the lifting module 4 based on the center line of the active screw 5, and a movable sleeve 7 is sleeved on one of the driven screws 6. The limit rod 12 is fixedly arranged on the lower plate support 1 and is arranged adjacent to the lifting module 4, and a positioning block 14 is fixedly arranged on the upper part of the limit rod 12, and a sliding block 13 is slidably connected to the lower part of the limit rod 12. The sliding block 13 slides up and down with the driven screw 6 through the movable sleeve 7, thereby controlling the upper and lower positions of the driven screw 6 and realizing the limiting of the lifting module 4.

[0027] Furthermore, a positioning protrusion 16 is provided at the bottom end of the mounting plate 15 , and the first connecting tube 24 is limited by the positioning protrusion 16 , so as to facilitate guiding the capillary tube 28 connected to the first connecting tube 24 .

[0028] Furthermore, a second spring 27 is sleeved on the compression sealing head 26 so as to transmit pressure downwards through the second spring 27 .

[0029] Furthermore, the force transmission rods 19 are sleeved with first springs 20 so as to transmit pressure downwards through the first springs 20 .

[0030] Specifically, in the structure of the above-mentioned fully automatic sample injector positive pressure loading device, the first end of the force transmission rod 19 is embedded in the mounting plate 15 through a self-locking pin 191, and a fixed cross pin 192 is horizontally passed through the self-locking pin 191; the second end of the force transmission rod 19 is connected with an adjustment screw 21, and the upper and lower positions and transmission distances of the force transmission rod 19 can be adjusted by adjusting the screw 21, thereby changing the size of its transmission force.

[0031] In the technical solution of the utility model, the lifting module 4 and the sealing module 18 are arranged to work together to realize the fully automatic positive pressure loading operation, which is the technical key of this case. Figure 3~Figure 4 The focus is on the operation process of the relevant components involved in the operation of the lifting module 4 and the sealing module 18. Figure 5 The specific structure of the sealing module 18 is shown. For the first spring 20 and the second spring 27 and other components, ordinary technicians in this field can make conventional settings according to the existing technology. This case has no special requirements for their model selection and combined use.

[0032] In this way, the technical solution of the utility model is adopted, by starting the driving motor 8 to control the rotation of the active wheel 9, and the active wheel 9 transmits power to the driven wheel 11 through the transmission belt 10, so that the driven wheel 11 drives the lifting module 4 to move up and down to carry out the lifting operation, and then when the container 29 is sent to the designated sealing position through the lifting module 4, based on the operation mechanism of fully automatic positive pressure loading, the positive pressure applied force of the sealing module 18 acts on the force transmission rod 19, and acts on the container 29 through the first spring 20 and the second spring 27 located on the outside of the compression sealing head 26, and completes the operations of centering the container bottle mouth, piercing the rubber stopper of the container bottle mouth with a hollow needle, and directly extending the capillary 28 into the liquid in turn, and finally after reaching the designated position, the silicone column tube 17 and the compression sealing head 26 are used to complete the sealing of various parts of the container 29.

[0033] From the above description, it can be found that compared with the prior art, after adopting the technical solution of the utility model, through the fully automatic positive pressure loading operation, the sealing module applies three groups of elastic forces of different strengths in turn, and the capillary column loading action is applied to the corresponding container in steps, thereby realizing the functions of centering the container bottle mouth, piercing the rubber stopper with a hollow needle, and directly extending the capillary into the liquid; moreover, the loading speed is accelerated by the fully automatic positive pressure loading, and the capillary column injection is efficiently matched, and the part that is in direct contact with the liquid during the loading process is only the capillary, so that it is easy to clean.

[0034] The technical scheme, working process and implementation effect of the utility model are described in detail above. It should be noted that what is described is only a typical example of the utility model. In addition, the utility model can also have many other specific implementation methods. All technical schemes formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model.

Claims

1. A fully automatic sample injector positive pressure loading device, comprising a lower plate support (1) and an upper plate support (2) arranged in parallel and spaced apart in the upper and lower directions, and also comprising two support columns (3), wherein the two support columns (3) are respectively connected to the outer sides of the lower plate support (1) and the upper plate support (2) to form a frame body, wherein the frame body is provided with a lifting module (4) and a sealing module (18), Features: The lifting module (4) is fixedly connected to a die table (22) arranged on the lower plate support (1); the central part of the lifting module (4) is drivingly connected to a driving screw (5); a driven wheel (11) is installed on the first end of the driving screw (5); the driven wheel (11) and a driving wheel (9) are mutually sleeved via a transmission belt (10); the driving wheel (9) is installed on the output shaft of the driving motor (8); and a positioning seat (23) for fixing the container (29) is provided on the die table (22); The sealing module (18) is connected to a mounting plate (15) for vertical movement via two symmetrically arranged force transmission rods (19); the mounting plate (15) is fixedly connected to an upper plate support (2); and a first connecting plug (24) is provided inside the mounting plate (15) located at an upper position; a silicone column tube (17) is also provided on the sealing module (18); the bottom end of the silicone column tube (17) passes through the sealing module (18) and is connected to a compression sealing head (26); and a second connecting plug (25) is provided between the compression sealing head (26) and the inside of the silicone column tube (17).

2. The fully automatic sample injector positive pressure sample loading device according to claim 1, Features: Two driven screw rods (6) are symmetrically arranged on the lifting module (4) with the center line of the active screw rod (5) as a reference, and a movable sleeve (7) is sleeved on one of the driven screw rods (6).

3. The positive pressure sample loading device of the fully automatic sample injector according to claim 1, Features: A limiting rod (12) is fixedly provided on the lower plate support (1) and is arranged adjacent to the lifting module (4), and a positioning block (14) is fixedly provided on the upper part of the limiting rod (12), and a sliding block (13) is slidably connected to the lower part of the limiting rod (12), and the sliding block (13) is slidably matched with the driven screw (6) through the movable sleeve (7).

4. The positive pressure sample loading device for the fully automatic sample injector according to claim 1, Features: A positioning protrusion (16) for limiting the position of the first connecting plug tube (24) is provided at the bottom end of the mounting plate (15).

5. The fully automatic sample injector positive pressure sample loading device according to claim 1, Features: The force transmission rods (19) are sleeved with first springs (20) for transmitting pressure.

6. The positive pressure sample loading device for the fully automatic sample injector according to claim 5, Features: The first end of the force transmission rod (19) is embedded in the mounting plate (15) via a self-locking pin (191), and a fixed transverse pin (192) is transversely connected to the self-locking pin (191); the second end of the force transmission rod (19) is connected to an adjustment screw (21).

7. The positive pressure sample loading device for the fully automatic sample injector according to claim 1, Features: The first connecting cannula (24) and the second connecting cannula (25) are arranged in an aligned manner up and down, and the calibers of the first connecting cannula (24) and the second connecting cannula (25) are matched to the caliber of the capillary tube (28).

8. The positive pressure sample loading device for the fully automatic sample injector according to claim 1, Features: The compression sealing head (26) is sleeved with a second spring (27) for transmitting pressure.

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