CN107402273B - Automatic sampling assembly and three-dimensional automatic sampling system - Google Patents

Abstract

An automatic sampling assembly for mounting on a sampling assembly fixture of an automatic sampling system, the automatic sampling assembly comprising: the device comprises a tension spring fixing plate, two tension springs, a guide rail, a sliding block, a connecting block, a bottle pressing block and a sampling needle seat, wherein the connecting block is fixedly connected with a sampling assembly fixing part, and the sliding block and the sampling needle seat are respectively fixed on the connecting block; the guide rail is arranged on the sliding block in a penetrating way, so that the guide rail and the sliding block form a sliding structure; the tension spring fixing plate is fixed at the upper end of the guide rail, and the bottle pressing block is fixed at the lower end of the guide rail; the two tension springs are respectively arranged at two sides of the guide rail, are arranged between the tension spring fixing plate and the connecting block, and are in a stretched state under the action of the tension spring fixing plate and the connecting block; a sampling needle is fixed on the sampling needle seat. The automatic sampling assembly can quickly and reasonably press the sample bottle to realize sampling, and the sampling needle can be quickly separated from the sample bottle.

Description

Automatic sampling components and three-dimensional automatic sampling system

Technical field

The invention relates to an automatic sampling system, and in particular to an automatic sampling component and a three-dimensional automatic sampling system including the automatic sampling component.

Background technique

In the fields of biology, chemistry, medical care, and chemical industry, with the development of automation technology, automatic sampling systems have gradually replaced manual sampling and become one of the key links in obtaining samples. Using the automatic sampling system, users can automatically obtain a certain amount of samples from a specific sample container, and then transport the sample to a target container such as a mixer, waiting for further testing and other processing of the sample.

For example, a chromatographic analysis instrument includes at least: infusion pump, automatic sampling system, chromatographic column, chromatographic detection system, analysis system, etc.

The infusion pump is used to provide mobile phase for the entire chromatographic analysis instrument. The mobile phase is the substance in the chromatographic analysis instrument that carries the detected sample forward, such as acetonitrile-aqueous solution, methanol-aqueous solution, etc.

The automatic sampling system is used to automatically take out the detected sample from the sample container, then mix the sample with the mobile phase through a proportional valve, and then send it into the chromatographic column.

The chromatographic column is used for liquid separation after the sample and the mobile phase are mixed, because each component in the sample is different from the stationary phase in the chromatographic column (the stationary phase is the phase that is stationary and separates the sample in the chromatographic analysis instrument, for example Silica gel, etc.) have different polarities. When the mobile phase flows through the chromatographic column, after separation by the stationary phase, the sample is sequentially precipitated from the mobile phase, waiting for detection by the detection system.

The chromatographic detection system is used to detect the separated samples in the chromatographic column, convert them into corresponding optical signals or electrical signals, and then send them to the analysis system for qualitative and/or quantitative analysis. The chromatographic detection system can be a fluorescence detection system or a diode array detection system. , electrochemical detection system, etc.

The analysis system is a host computer software that is used to store and analyze the optical signals or electrical signals detected by the chromatographic detection system, and display the analysis results to the user.

The automatic sampling system needs to automatically sample from the sample bottle. The sample bottle is placed in the sample tray. The automatic sampling system generally needs to first press the corresponding sample bottle through the bottle pressing component, and then pierce the rubber gasket of the sample bottle with the sampling needle. Make the sampling needle come into contact with the sample, and then take the sample. After the sampling is completed, the sampling needle needs to be separated from the rubber gasket of the sample bottle, return to its original position, and wait for the next sampling.

During the entire sampling process, you need to face the following problems:

1. There are various sizes of sample bottles. How to press the sample bottles correctly without using too much force is always a problem;

2. How to quickly detach the sampling needle from the sample bottle without taking up the sample bottle is also one of the problems that needs to be solved.

Contents of the invention

In order to solve the above technical problems, the present invention provides an automatic sampling assembly that can quickly and reasonably press the sample bottle to achieve sampling, and the sampling needle can quickly separate from the sample bottle.

The automatic sampling component provided by the invention is installed on a sampling component fixing part of the automatic sampling system:

The automatic sampling assembly includes: a tension spring fixed plate, two tension springs, a guide rail, a slide block, a connecting block, a bottle pressing block, and a sampling needle holder,

The connecting block is fixedly connected to the fixed part of the sampling assembly, and the slider and the sampling needle holder are respectively fixed on the connecting block;

The guide rail is installed on the slider, so that the guide rail and the slider form a sliding structure;

The tension spring fixing plate is fixed on the upper end of the guide rail, and the bottle pressing block is fixed on the lower end of the guide rail;

The two tension springs are respectively arranged on both sides of the guide rail and installed between the tension spring fixing plate and the connecting block, and are in a position under the action of the tension spring fixing plate and the connecting block. being stretched;

A sampling needle is fixed on the sampling needle seat.

The automatic sampling assembly provided by the invention has a connecting block as the main body fixedly connected to the fixed part of the sampling assembly. A sampling needle holder and a sliding block are installed on the connecting block. A guide rail is provided through the slide block. The guide rail and the slide block form a sliding structure. The guide rail It can slide up and down along the slider, fix the tension spring fixed plate at the upper end of the guide rail, install the tension spring between the tension spring fixed plate and the slider, the tension spring is always in a stretched state, and install the bottle pressure block at the lower end of the guide rail. During specific work, the fixed part of the sampling assembly drives the connecting block to move downward. Since the force on the guide rail is only the tension of the tension spring, the guide rail moves downward together with the connecting block; when the bottle pressing block at the lower end of the guide rail presses the sampling bottle, The fixed part of the sampling assembly continues to drive the connecting block to move downward. At this time, because the lower end of the guide rail is held up by the sampling bottle, the guide rail no longer moves relative to the sampling bottle, while the connecting block and the slider continue to move downward relative to the guide rail. During this process, the The spring is gradually stretched by the fixed tension spring fixing plate and the downward-moving connecting block, so that the force of the tension spring gradually increases. In this process, the sampling needle installed on the sampling needle seat can pierce the rubber of the sampling bottle. After the sampling is completed, the fixed part of the sampling component moves upward, driving the sampling needle away from the sampling bottle, and then during the further upward movement of the fixed part of the full component, due to the tension of the tension spring, the guide rail is driven It moves upward together with the bottle pressing block to complete a sampling process. During the entire sampling process, due to the existence of the guide rail, the guide rail can freely slide along the slider under the action of force. Regardless of the height of the sample bottle, the guide rail and the tension spring can adaptively realize rapid bottle compression while sampling. At this time, due to the action of the guide rail and the tension spring, the sampling needle will not bring up the sample bottle. The entire sampling process for the sample bottle is a process of gradually receiving force and gradually releasing force, rather than a process of hard force. Therefore, the entire sampling process The force is very smooth.

As an example, in the automatic sampling assembly of the present invention, two tension springs are respectively fixed on the connecting block, and the two tension springs are installed between the tension spring fixing plate and the tension spring. space, and make the axes of the two tension springs parallel to the guide rail.

As another example, in the automatic sampling assembly of the present invention, the slider is installed in a space surrounded by the sampling needle holder and the connecting block.

As another example, in the automatic sampling assembly of the present invention, the bottle pressure block is provided with a through hole, and the sampling needle fixed on the sampling needle seat is disposed through the through hole.

As another example, in the automatic sampling assembly of the present invention, the pressure bottle block includes a connecting layer and a supporting layer, the cross section of the connecting layer is in a U-shaped structure, and the upper part of the U-shaped structure is arranged to be in line with the The guide rail matches the square groove; the support layer is arranged at the bottom of the connection layer and is cylindrical; the through hole passes through the lower part of the connection layer and the support layer.

As another example, in the automatic sampling assembly of the present invention, a photocoupler detector is provided on the connection block, a photocoupler block is fixed on the guide rail, and the photocoupler detector and the The optocoupler block is used to detect that the automatic sampling component is in the initial zero position.

As another example, in the automatic sampling assembly of the present invention, the photocoupler baffle is L-shaped, one side is fixed to the guide rail, and the other side corresponds to the detection position of the photocoupler detector.

As another example, in the automatic sampling assembly of the present invention, a plurality of tension spring fixing holes are arranged on the tension spring piece.

In order to solve the above problems existing in the background technology, the present invention also provides a three-dimensional automatic sampling system. The three-dimensional automatic sampling system includes an automatic sampling component. The automatic sampling component is installed on a sampling component fixing part of the automatic sampling system. superior:

The automatic sampling assembly includes: a tension spring fixed plate, two tension springs, a guide rail, a slide block, a connecting block, a bottle pressing block, and a sampling needle holder,

The connecting block is fixedly connected to the fixed part of the sampling assembly, and the slider and the sampling needle holder are respectively fixed on the connecting block;

The guide rail is installed on the slider, so that the guide rail and the slider form a sliding structure;

The tension spring fixing plate is fixed on the upper end of the guide rail, and the bottle pressing block is fixed on the lower end of the guide rail;

The two tension springs are respectively arranged on both sides of the guide rail and installed between the tension spring fixing plate and the connecting block, and are in a position under the action of the tension spring fixing plate and the connecting block. being stretched;

A sampling needle is fixed on the sampling needle seat.

The automatic sampling assembly provided by the present invention uses a guide rail slider structure and a tension spring structure as a buffer structure for the force during the sampling process. Regardless of the height of the sample bottle, the guide rail and the tension spring can adaptively realize rapid bottle compression, while sampling Due to the action of the guide rail and the tension spring, the sampling needle will not bring up the sample bottle. The entire sampling process is a process of gradual stress and gradual release of force for the sample bottle, rather than a process of hard force. Therefore, the entire sampling process is affected by The force is very smooth.

Description of the drawings

Figure 1 is a schematic structural diagram of the three-dimensional automatic sampling system 100 of the present invention;

Figure 2 is a schematic structural diagram of the front view of the three-dimensional automatic sampling system 100 of the present invention;

Figure 3 is a schematic structural diagram of the three-dimensional automatic sampling system 100 of the present invention;

Figure 4 is a schematic structural diagram of the X-direction moving component 1 of the present invention;

Figure 5 is a schematic structural diagram of the Y-direction moving component 2 of the present invention;

Figure 6 is another structural schematic diagram of the Y-direction moving component 2 of the present invention;

Figure 7 is a schematic structural diagram of the Z-direction moving component 3 of the present invention;

Figure 8 is another structural schematic diagram of the Z-direction moving component 3 of the present invention;

Figure 9 is a schematic structural diagram of the bottle pressing block 511 of the present invention;

Among them, 100 is a three-dimensional automatic sampling system, 1 and 1' are X-direction moving parts, 2 and 2' are Y-direction moving parts, 3 and 3' are Z-direction moving parts, 4 is the bottom plate, 5 is the sampling part, and 6 is Injection valve, 11 and 12 are mounting plates, 13 and 15 are optical shafts, 14 is the first screw, 16 is the square shaft, 17 is the first screw driving part, 18 is the moving block, and 21 is the second screw , 22 is the second screw driving part, 23 is the screw nut, 24 is the adapter plate, 25 and 26 are slide rails, 27 is the moving cover plate, 28 is the sample rack, 29 is the sample bottle, 210 is the first slide block, 211 is the second slide block, 31 is the gear, 32 is the square shaft driving part, 33 is the rack, 51 is the first guide rail, 52 is the third slide block, 53 is the fourth slide block, 54 is the connecting block, 55 is the second guide rail, 56 is the fifth slide block, 57 is the sampling needle seat, 58 is the tension spring fixed plate, 59 and 510 are tension springs, 511 is the bottle pressure block, 512 is the sampling needle, 513 and 514 are tension springs piece, 515 is an optocoupler detector, 516 is an optocoupler blocking plate, 517 is a through hole, 61 is a connection layer, 62 is a support layer, and 63 is a square groove.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

With reference to accompanying drawing 1, accompanying drawing 1 shows a three-dimensional automatic sampling system 100 of the present invention, including an X-direction movement system, a Y-direction movement system, a Z-direction movement system and a base plate 4. The X-direction movement system includes a parallel Two sets of X-direction moving parts 1 and 1' are provided. The Y-direction motion system includes two sets of Y-direction moving parts 2 and 2' arranged in parallel. The Z-direction motion system includes two sets of X-direction motion systems 1 and 2' installed respectively. Two sets of Z-direction moving parts 3 and 3' on 1', where X-direction moving parts 1 and 1' are installed on the base plate 4, and Y-direction moving parts 2 and 2' are installed between X-direction moving parts 1 and 1' on the base plate 4.

With reference to Figure 2 and Figure 4, this embodiment uses the X-direction movement component 1 as a specific embodiment to describe the X-direction movement system in detail.

In this embodiment, the X-direction moving component 1 includes mounting plates 11 and 12 arranged vertically on both sides, optical axes 13 and 15, a first screw 14, a moving block 18, and a first screw driving part 17.

The mounting plates 11 and 12 are vertically installed on the base plate 4. The mounting plates 11 and 12 and the base plate 4 together form the support structure of the three-dimensional automatic sampling system 1.

The optical axes 13 and 15 and the screw 14 are installed between the two mounting plates 11 and 12 along the X direction. In this embodiment, the X direction is the horizontal direction, and the screw 14 is installed in the middle of the optical axis 13 and the optical axis 15 , so that the screw 14, the optical axis 13, and the optical axis 15 form a straight line in the Z direction.

One end of the screw 14 is connected to a screw driving part 17. In this embodiment, the screw driving part 17 is installed on the outside of the mounting plate 11, and the screw driving part 17 can drive the screw 14 to rotate. The screw driving part 17 can be directly composed of a stepper motor, which is directly connected to the screw 14, or it can be implemented by a stepper motor through a synchronous belt, and the stepper motor drives the screw 14 to rotate through the synchronous belt.

The moving block 18 is arranged through the screw 14 and the optical axes 13 and 15. The moving block 18 and the screw 14 form a transmission structure. The screw driving part 17 can drive the screw 14 to rotate, and the rotation of the screw 14 can drive the screw 14 to rotate. The movement block 18 moves left and right along the X direction, that is, the rotational movement of the motor is converted into the linear movement of the movement block 18. The movement direction, movement speed, movement position, etc. of the movement block 18 are controlled by the motor rotation parameters.

The moving block 18 and the screw 14 are generally connected through a screw nut. A matching screw nut is provided on the screw 14, and then the moving block 18 and the screw nut are fixed to realize the screw nut. 14 and the transmission connection between the moving block 18.

Since the moving block 18 is also disposed through the two optical axes 13 and 15, the moving block 18 is simultaneously restricted by the optical axes 13, 15 and the screw 14 when moving in the X direction, so that the moving block 18 will not swing or rock back and forth. , ensuring that the moving block 18 moves left and right on a straight line in the X direction, thereby improving the accuracy of the automatic sampling system 100 .

As a modification, the screw driving part 17 can also be provided on the outside of the mounting plate 12 .

As a modification, the X-direction moving part 1 may include only one of the optical axes 13 and 15 .

As a modification, the position of the screw 14 may not be between the optical axis 13 and the optical axis 15 , for example, the screw 14 is disposed above the optical axis 13 and the optical axis 15 .

As another modification, the screw 14 and the optical axes 13 and 15 can be staggered in the Z direction.

With reference to Figures 1, 2, 3, 5 and 6, this embodiment uses the Y-direction movement component 2 as a specific embodiment to describe the Y-direction movement system in detail.

The Y-direction moving parts 2 and 2' are installed on the base plate 4 between the two mounting plates 11 and 12, and are installed in parallel in the Y-direction. The structures of the two Y-direction moving parts 2 and 2' are consistent.

The Y-direction moving part 2 includes a fixed frame, a second screw screw 21, a second screw driving part 22, and a sample tray. The screw 21 is arranged on the fixed frame along the Y direction, and the screw driving part 22 is fixed on the fixed frame. , and the output shaft of the screw driving part 22 is fixedly connected to the screw 21. The screw driving part 22 can drive the screw 21 to rotate. The screw 21 and the sample tray form a transmission structure. The rotation of the screw 21 can drive the sample tray along Y. direction of linear motion.

In this embodiment, the Y-direction moving part 2 also includes two slide rails 25 and 26, and the sample tray includes an adapter plate 24, a moving cover plate 27, and a sample rack 28.

The slide rails 25 and 26 are parallel to the screw 21 and are respectively installed on both sides of the screw 21 and fixed on the fixed frame. The bottom of the sample tray is provided with a screw nut 23. The screw nut 23 and the screw 21 directly form a transmission structure. , the two slide rails 25 and 26 are also respectively provided with first slide blocks 210 and second slide blocks 211 that cooperate with them. The screw driving part 22 can drive the screw 21 to rotate, and the rotation of the screw 21 drives the screw nut 23 to linearly move forward or backward in the Y direction. The screw nut 23 is fixed to the sample tray, so the sample tray moves in the screw direction. Driven by the lever nut 23, it moves forward or backward linearly in the Y direction.

Since the sample tray is generally set as a tray that can prevent many sample bottles 29 and has a certain length and width, in order to prevent the sample tray from tilting to a certain side, two slide rails 25 and 26 are provided to support the sample tray, so that the sample tray is When the screw 21 is driven by the movement, the gravity is evenly distributed, and the sliding along the Y direction is smooth and accurate; especially when the sampling part exerts a downward force on the sample bottle 29, the slide rails 25 and 26 can effectively support the sample tray.

The adapter plate 24 is the lowermost part of the sample tray. The bottom of the adapter plate 24 is fixedly connected to the screw nut 23 and the slide blocks 25 and 26 respectively. The movable cover 27 is installed on the upper part of the adapter plate 24. The movable cover The sample rack 28 is installed on the upper part of the plate 27, and the sample rack 28 is used to place the sample bottles 29. This arrangement makes it easy to assemble the Y-direction moving part 2 and to replace the sample tray.

As an example, the slide rails 210 and 211 in this embodiment are cylindrical slide rails, and the inner sides of the corresponding slide blocks 210 and 211 are cylindrical structures.

As a modification, the slide rails 25 and 26 can also adopt square slide rails or other shaped slide rails.

As another modification, in this embodiment, more slide blocks corresponding to the slide rails 25 and 26 can be provided.

As another modification, the slide rails 25 and 26 in this embodiment can also be omitted, and only the screw 21 itself is used as the support structure of the sample tray.

As another modification, the sample tray in this embodiment can also be an integrally formed structure instead of being separately designed as the adapter plate 24 , the movable cover 27 , and the sample rack 28 .

As an explanation, the screw driving part 22 can be directly composed of a stepper motor, and the stepper motor is directly connected to the screw 21, or it can be realized by a stepper motor through a synchronous belt, and the stepper motor drives the screw 21 to rotate through the synchronous belt. .

As an illustration, the sample bottle 29 can be any existing sample bottle used for placing liquid samples.

As an illustration, the Y-direction moving parts 2 and 2' can be arranged to be completely consistent, and the screw driving parts of the two can also be arranged on both sides of the Y-direction respectively.

With reference to Figures 1, 2, 4, 7 and 8, this embodiment uses the Z-direction movement component 3 as a specific embodiment to describe the Y-direction movement system in detail.

The Z-direction moving part 3 and the Z-direction moving part 3' are of completely identical structures. They are installed on the two X-direction moving parts 1 and 1' respectively. Driven by the X-direction moving parts 1 and 1', they move left and right along the X direction. .

The Z-direction moving part 3 includes a square shaft 16, a gear 31, a square shaft driving part 32, a rack 33, and a sampling part 5.

Among them, the square shaft 16 is arranged between the two mounting plates 11 and 12 and is arranged parallel to the screw 14 and the optical axis 13 and the optical axis 15. The gear 31 is arranged on the moving block 18 and sleeved on the square shaft 16. The shaft driving part 32 is fixedly connected to the square shaft 16, and the gear 31 is provided with a rack 33 along the Z direction. The sampling part 5 and the rack 33 are fixedly installed, and can drive the sampling part 5 to move left and right in the X direction and up and down in the Z direction. , the square shaft driving part 32 is arranged outside the mounting plate 12 , or may be arranged outside the mounting plate 11 .

Since the gear 31 is fixedly connected to the moving block 18, it can be driven by the moving block 18 to move left or right along the X direction, thereby driving the sampling part 5 to move left or right along the X direction. The square shaft driving part 32 can drive the square shaft 16 to rotate, and the rotation of the square shaft 16 can drive the gear 31 to rotate. The rotation of the gear 31 can drive the rack 33 to move upward or downward along the Z direction, and then drive the sampling part 5 along the Move upward or downward in the Z direction for sampling.

The sampling unit 5 will be described in detail below.

The sampling part 5 includes a first guide rail 51, a third slide block 52, a fourth slide block 53, a connecting block 54, a second guide rail 55, a fifth slide block 56, a sampling needle seat 57, a tension spring fixed plate 58, and a tension spring. 59 and 510, bottle pressing block 511, sampling needle 512, tension springs 513 and 514, photocoupler detector 515, photocoupler block 516, among which the connecting block 54, the second guide rail 55, the fifth slider 56, and the sampling needle The seat 57, the tension spring fixed plate 58, the tension springs 59 and 510, the pressure bottle block 511, the sampling needle 512, the tension springs 513 and 514, the photocoupler detector 515, the photocoupler baffle 516, etc. constitute the (automatic) sampling assembly. , and the gear 31, rack 33, moving block 18, first guide rail 51, etc. constitute the sampling component fixing part of the (automatic) sampling component.

The first guide rail 51 and the rack 33 are fixed together along the Z direction, so that the first guide rail 51 can move up and down along the Z direction driven by the rack 33 .

The slide blocks 52 and 53 are both fixedly installed on the moving block 18. The slide blocks 52 and 53 form a sliding fit structure with the guide rail 51, so that when the guide rail 51 moves up and down in the Z direction, it slides on the path composed of the slide blocks 52 and 53, rather than on the path formed by the slide blocks 52 and 53. There will be left and right offsets.

The connecting block 54 is fixedly connected to the guide rail 51 , and the connecting block 54 can move up and down along the Z direction driven by the guide rail 51 .

The fifth slide block 56 and the sampling needle holder 57 are both installed on the connecting block 54, and the slide block 56 is installed in the space surrounded by the sampling needle holder 57 and the connecting block 54, which saves space and also makes the slide block 56 The installation is more solid and less prone to offset.

The second guide rail 55 is disposed on the slide block 56 so that the guide rail 55 and the slide block 56 form a sliding structure. The guide rail 55 can move up and down along the straight line defined by the slide block 56 .

A tension spring fixing plate 58 is fixed on the upper end of the guide rail 55. The tension spring fixing plate 58 has a roughly T-shaped structure, and the two sides are used to install the tension springs 59 and 510. The tension springs 59 and 510 are respectively arranged on both sides of the guide rail 55, and are both Installed between the tension spring fixing plate 58 and the connecting block 54, the tension springs 59 and 510 are always in a stretched state under the action of the tension spring fixing plate 58 and the connecting block 54.

In this embodiment, two tension springs 513 and 514 are respectively fixed on both sides of the connecting block 54. The tension springs 59 and 510 are installed between the tension springs 513 and 514 and the tension spring fixing plate 58, and the tension springs 59 and 510 are installed between the tension springs 513 and 514. The axes of the springs 59 and 510 are parallel to the guide rail 55, that is, the axes of the two tension springs 59 and 510 are in a straight line along the Z-axis direction, so that the best effect can be achieved.

The axis center of the tension spring 59 and 510 refers to: Since the tension spring is generally a cylindrical structure, the axis center of the cylinder is the straight line defined by the center of the circular section of the cylinder, and this straight line is the axis center of the tension spring. .

A bottle pressing block 511 is installed at the lower end of the guide rail 55. The bottle pressing block 511 is used to fix the sample bottle 29 during sampling so that the sample bottle 29 will not shake during sampling.

The sampling needle 512 is installed on the sampling needle seat 57, and a through hole 517 is provided on the bottle pressing block 511, so that the sampling needle 512 can pass through the through hole 517.

In this embodiment, with reference to Figure 9, the bottle pressing block 511 includes a connecting layer 61 and a supporting layer 62. The cross section of the connecting layer 61 is a U-shaped structure, and the upper part of the U-shaped structure is configured to match the guide rail 55. The square groove 63 has a through hole 517 at the lower part of the U-shaped structure. The support layer 62 is cylindrical and is arranged at the bottom of the connecting layer 61. When sampling, the support layer 62 is in direct contact with the sample bottle 29. The middle part of the support layer 62 is also The through hole 517 , that is, the through hole 517 passes through the lower part of the connection layer 61 and the support layer 62 , so that the sampling needle 512 can pass through the through hole 517 and enter the sample bottle 29 .

The square groove 63 of the bottle pressing block 511 can also be provided with a screw hole for fixing the bottle pressing block 511 and the guide rail 55 together with a screw.

In this embodiment, a photocoupler detector 515 is also provided on the connection block 54, and a photocoupler blocker 516 is provided correspondingly on the guide rail 55. The photocoupler detector 515 and the photocoupler blocker 516 can be used for detection. The sampling part 5 (or automatic sampling component) is at the initial zero position, or at a certain predetermined position.

As a modification, the axial direction of the tension springs 59 and 510 can also deviate from the Z-axis direction. For example, the lower parts of the two tension springs 59 and 510 can be retracted in the direction of the guide rail 55 .

As a modification, the connecting block 54 can be directly connected to the tension springs 59 and 510 without the need for the tension springs 513 and 514 .

As a modification, the slider 56 may not be in the space surrounded by the connecting block 54 and the sampling needle holder 57, but may be installed separately.

As a modification, the sample bottle 29 can also be fixed on the bottle pressing block 511 by providing a semi-surrounding hole, and the sampling needle 512 can pass through the bottle pressing block 511 and enter the sample bottle 29 .

As a modification, the bottle pressing block 511 can also only adopt a structure such as a trapezoid, a rectangle, etc., which can also achieve the effect of fixing the sample bottle 29.

As an example, the optocoupler baffle 516 is L-shaped, with one side fixed to the guide rail 55 and the other side corresponding to the detection position of the optocoupler detector 515. The optocoupler baffle 516 can be driven by the guide rail 55. down to the detection position of the photocoupler detector 515. At this time, it indicates that the sampling part 5 (or automatic sampling component) has reached the predetermined initial zero position. When sampling, the photocoupler baffle 516 is driven by the guide rail 55 and leaves the photocoupler. The detection bit of detector 515 is sampled.

As an example, the tension springs 513 and 514 are arranged with a plurality of tension spring fixing holes, and different tension spring fixing holes can be selected according to the magnitude of the pulling force of the tension springs 59 and 510 .

The specific sampling process will be described in detail below with reference to Figures 1 to 9.

Taking the direction shown in Figure 2 as the forward direction, when the user uses the three-dimensional automatic sampling system 100 of the present invention for sampling, the user needs to place a sample containing the sample on the sample rack 28 of the Y-direction moving parts 2 and 2'. Sample bottles 29. Different models of sample bottles 29 can be selected according to needs. Many sample bottles 29 can be placed on the sample rack 28. The same sample can be placed in the sample bottles on the two Y-direction moving parts 2 and 2'. , you can also place different samples.

The fixed ends of the two sampling needles 512 of the two Z-direction moving parts 3 and 3' are connected to the same injection valve 6 through their respective conduits. The injection valve 6 can be a six-way valve, an eight-way valve, etc. The injection valve 6 shown in Figure 1 is a six-way valve.

In specific connection, the sampling needle 512 of the Z-direction moving part 3 is connected to one of the injection ends of the injection valve 6 through a conduit, and the sampling needle 512 of the Z-direction moving part 3' is connected to the other injection end of the injection valve 6 through a conduit. end.

When specifically sampling, in the X-direction moving part 1, the first screw driving part 17 drives the screw 14 to rotate, and the screw 14 drives the moving block 18 and the entire Z-direction moving part 3 connecting the moving block 18 to move leftward in the X direction. To the top of the Y-direction moving part 2, the Y-direction moving part 2, driven by the second screw driving part 22, rotates the screw 21 to drive the sample holder 28 to move forward in the Y direction to below the X-direction moving part 1, Make the sampling needle 512 of the Z-direction moving part 3 align with the sample bottle 29 on the Y-direction moving part 2; in the X-direction moving part 1', the first screw driving part drives the screw to rotate, and the screw drives the moving block and the connection movement. The entire Z-direction moving part of the block moves to the right along the Move backward in the Y direction to the bottom of the X-direction moving part 1', so that the sampling needle of the Z-direction moving part 3' is aligned with the sample bottle on the Y-direction moving part 2'.

The sampling valve 6 is switched to the passage connected to the sampling needle 512 of the Z-direction moving part 3, and then the square shaft driving part 32 of the Z-direction moving part 3 moves, driving the square shaft 16 and the gear 31 to rotate, and the rotation of the gear 31 will drive the teeth. The rack 33 moves downward. The rack 33 will drive the guide rail 51 fixedly connected to the rack 33 to move downward synchronously. The guide rail 51 will drive the connecting block 54 to move downward. The entire sampling part 5 connected to the connecting block 54 will move downward. During the downward movement, the bottle pressing block 511 first contacts and presses the sample bottle 29. Driven by the square shaft driving part 32, the entire sampling part 5 continues to move downward. At this time, the bottle pressing block 511 has In fixed contact with the sample bottle 29, the bottle pressing block 511 and the guide rail 55 no longer move, while the rack 33, the guide rail 51, the connecting block 54, the sampling needle 512, etc. all continue to move downward. The downward movement of the connecting block 54 and the guide rail The stationary movement of 55 will continuously stretch the two tension springs 59 and 510. The tension springs 59 and 510 will continue to be further stretched by the tensile force until the sampling needle 512 pierces the rubber bottle cap of the sample bottle 29 and enters the sample bottle 29. During sampling, the sampling needle 512 enters the sample bottle 29 and the sample obtained will enter the quantitative loop of the injection valve 6 to complete one sampling. Then the square shaft driving part 32 rotates in the opposite direction and drives the square shaft 16 to rotate in the opposite direction. 16 will drive the gear 31 to rotate in the opposite direction. The reverse rotation of the gear 31 will drive the rack 33 and the guide rail 51 to move upward. The guide rail 51 will drive the connecting block 54 and others to move upward. Since the tension springs 59 and 510 continue to exert force on the guide rail 55 With the downward force, the bottle pressing block 511 remains stationary, and the sampling needle 512 gradually detaches from the rubber bottle cap of the sample bottle 29. Then, when the connecting block 54 continues to move upward, the pulling force of the tension springs 59 and 510 gradually decreases, and the guide rail 55 The degree of freedom is gradually released, driving the bottle pressing block 511 to leave the sample bottle and return to the initial position, and the first step of the sampling process is completed.

When the above-mentioned first step of sampling is completed, the first screw driving part 17 will drive the entire sampling part 5 to continue moving to the left to the needle washing position to perform needle washing (including the inner and outer walls of the sampling needle 512, etc.).

During the above-mentioned needle washing operation, the sampling valve 6 is switched to the sampling needle connection passage of the Z-direction moving part 3', and the Z-direction moving part 3' repeats the above-mentioned sampling process of the Z-direction moving part 3: Z-direction moving part 3 The movement of the square shaft driving part drives the square shaft and the gear to rotate. The rotation of the gear will drive the rack to move downward. The rack will drive the guide rail fixedly connected to the rack to move downward synchronously. The guide rail will drive the connecting block downward. movement, the entire sampling part connected to the connecting block will move downward. During the downward movement, the bottle pressing block first contacts and presses the sample bottle. Driven by the square shaft driving part, the entire sampling part continues to move downward. , at this time, since the bottle pressing block has been in fixed contact with the sample bottle, the bottle pressing block and the guide rail no longer move, while the rack, guide rail, connecting block, sampling needle, etc. continue to move downward. The downward movement of the connecting block and the guide rail The two tension springs and springs will continue to stretch when they are still. The tension springs and tension springs will continue to be further stretched under the action of tension until the sampling needle pierces the rubber bottle cap of the sample bottle and enters the sample bottle for sampling. The sampling needle enters the sample. The sample obtained from the bottle will enter the quantitative loop of the injection valve to complete a sampling. Then the square shaft driving part rotates in the opposite direction, driving the square shaft to rotate in the opposite direction. The square shaft will drive the gear to rotate in the opposite direction, and the reverse rotation of the gear will The rack and guide rail are driven to move upward, and the guide rail will drive the connecting block and the like to move upward. Since the tension spring and the pulling force continue to exert downward force on the guide rail, the bottle pressing block remains stationary, and the sampling needle gradually loses force on the rubber bottle cap of the sample bottle. Then, as the connecting block continues to move upward, the tension of the tension spring and the tension spring gradually decreases, and the degree of freedom of the guide rail is gradually released, driving the bottle pressing block to leave the sample bottle and return to the initial position. The second step of the sampling process is completed.

When the sampling in the second step above is completed, the first screw driving part will drive the entire sampling part to continue to move left (or right) to the needle washing position to perform needle washing (including the inner and outer walls of the sampling needle, etc.), X The direction moving part 1 and the Z direction moving part 3 continue the next sampling operation, and repeat the above process in sequence.

It should be noted that during the above sampling process, the two Y-direction moving parts 2 and 2' can be interchanged, or the above-mentioned sampling process can also be completed using only one Y-direction moving part, but the Y-direction moving part needs to be moved every time Perform forward and backward movements while sampling.

It should be further explained that since the three-dimensional automatic sampling system 100 of the present invention includes two groups of sampling systems that can freely form a sampling system, it can also complete the sampling work of two samples at the same time, such as the X-direction moving part 1 and the Y-direction moving part. Part 2 and Z-direction moving part 3 are used to sample the sample 1 therein, and X-direction moving part 1', Y-direction moving part 2', and Z-direction moving part 3' are used to sample the sample 2, so that sampling Programs are more diverse.

It can be seen from the above description of the sampling process that the sampling part 5 (or automatic sampling component) of the present invention uses the free guide rail 55 and the tension springs 59 and 510 as the fixing method of the bottle pressure block 511, so it can perfectly adapt to different conditions. The high sample bottle 29 will not press the sample bottle 29 with excessive force. When the sampling needle 512 is separated from the sample bottle 29, the force generated by the tension springs 59 and 510 can press the bottle pressing block 511, so that the bottle is pressed. The block 511 can keep pressing the sample bottle 29 before the sampling needle 512 is separated from the sample bottle 29. The entire sampling process is fast, accurate and efficient. Therefore, the solution of the sampling part 5 (or automatic sampling assembly) of the present invention solves the problem of sample bottles with multiple sizes. Various problems bring about the problem of how to press the sample bottle correctly without using too much force, and how to quickly detach the sampling needle from the sample bottle without lifting the sample bottle.

The sampling process of the three-dimensional automatic sampling system 100 of the present invention is carried out in two three-dimensional automatic sampling systems (respectively composed of the X-direction moving part 1, the Y-direction moving part 2, the Z-direction moving part 3 and the 2' and Z-direction moving parts 3') are switched sequentially. Even during the needle cleaning operation of one of the three-dimensional sampling systems, the other three-dimensional sampling system can continue to work, which greatly improves the sampling efficiency of the automatic sampling system and reduces the By reducing the time interval between two samplings, the analysis efficiency of the chromatographic analysis instrument using the three-dimensional automatic sampling system 100 can be improved and the analysis time can be shortened. Therefore, the three-dimensional automatic sampling system of the present invention solves the problem of low sampling efficiency of the automatic sampling system. question.

The above are only specific embodiments of the present invention. It should be understood that the description of the above embodiments is only used to help understand the method of the present invention and its core idea, and is not used to limit the protection scope of the present invention. Any modifications, equivalent substitutions, etc. made within the ideas and principles of the present invention shall be included in the protection scope of the present invention.

Claims (9)

1. An automatic sampling component, installed on a sampling component fixed part of the automatic sampling system, characterized by: The automatic sampling assembly includes: a tension spring fixed plate, two tension springs, a guide rail, a slide block, a connecting block, a bottle pressing block, and a sampling needle holder, The connecting block is fixedly connected to the fixed part of the sampling assembly, and the slider and the sampling needle holder are respectively fixed on the connecting block; The guide rail is installed on the slider, so that the guide rail and the slider form a sliding structure; The tension spring fixing plate is fixed on the upper end of the guide rail, and the bottle pressing block is fixed on the lower end of the guide rail; The two tension springs are respectively arranged on both sides of the guide rail and installed between the tension spring fixing plate and the connecting block, and are in a position under the action of the tension spring fixing plate and the connecting block. being stretched; A sampling needle is fixed on the sampling needle holder, wherein, The fixed part of the sampling component drives the connecting block to move downward, and the guide rail moves downward together with the connecting block; when the bottle pressing block at the lower end of the guide rail presses the sampling bottle, the fixed part of the sampling component continues to drive the connecting block to move downward. At this time, because the lower end of the guide rail is held up by the sampling bottle, the guide rail no longer moves relative to the sampling bottle, while the connecting block and the slider continue to move downward relative to the guide rail. During this process, the tension spring is gradually fixed by the tension spring. The fixed plate and the downward-moving connecting block continue to stretch, causing the force of the tension spring to gradually increase. During this process, the sampling needle installed on the sampling needle seat can pierce the rubber gasket of the sampling bottle and take samples; after the sampling is completed , the fixed part of the sampling component moves upward, driving the sampling needle to separate from the sampling bottle, and then during the further upward movement of the fixed part of the sampling component, due to the tension of the tension spring, the guide rail and the bottle pressing block are driven to move upward together, completing a Sampling process. 2. The automatic sampling component according to claim 1, characterized in that: Two tension springs are respectively fixed on the connecting block, and the two tension springs are installed between the tension spring fixing plate and the tension spring, so that the axes of the two tension springs are in line with the The guide rails are parallel. 3. The automatic sampling component according to claim 1 or 2, characterized in that: The slide block is installed in the space surrounded by the sampling needle holder and the connecting block. 4. The automatic sampling assembly according to claim 1, characterized in that: The bottle pressure block is provided with a through hole, and the sampling needle fixed on the sampling needle seat is arranged through the through hole. 5. The automatic sampling assembly according to claim 4, characterized in that: The bottle pressing block includes a connecting layer and a supporting layer, The cross-section of the connecting layer is a U-shaped structure, and the upper part of the U-shaped structure is set as a square groove matching the guide rail; The support layer is arranged at the bottom of the connecting layer and is cylindrical; The through hole passes through the lower part of the connection layer and the support layer. 6. The automatic sampling component according to claim 1, characterized in that: A photocoupler detector is provided on the connection block, and a photocoupler block is fixed on the guide rail. The photocoupler detector and the photocoupler block are used to detect that the automatic sampling assembly is at initial zero. Bit. 7. The automatic sampling component according to claim 6, characterized in that: The optocoupler baffle is L-shaped, with one side fixed to the guide rail and the other side corresponding to the detection position of the optocoupler detector. 8. The automatic sampling component according to claim 2, characterized in that: A plurality of tension spring fixing holes are arranged on the tension spring piece. 9. A three-dimensional automatic sampling system, characterized by: including the automatic sampling component according to any one of claims 1-8.