Sampling device of liquid chromatograph-mass spectrometer

Abstract

The utility model relates to the technical field of liquid chromatography-mass spectrometry instruments, in particular to a sample introduction device of a liquid chromatography-mass spectrometry instrument, which comprises an instrument main body, a sample introduction disc and a sampling needle, an auxiliary sample introduction component is arranged on the side edge of the sample introduction disc, and a positioning component is arranged corresponding to the sampling needle; the auxiliary sample injection assembly comprises an arc-shaped annular conveying belt, a support is arranged at the bottom of the annular conveying belt, a supporting platform is arranged at the bottom of the support, and a lifting electric cylinder is arranged at the bottom of the supporting platform; a telescopic bracket is arranged at the bottom of the sample introduction disc, and a telescopic electric cylinder is connected to the telescopic bracket. According to the utility model, the sample injection disc is not required to be taken out for sample injection, temporary sample injection testing or supplementary sample injection can be carried out at any time without influencing the original sample arrangement sequence, and the operation is flexible and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid-mass spectrometer, in particular to a sample injection device of a liquid-mass spectrometer. Background Art

[0002] Although there are many types of LC-MS sampling devices on the market today, most of them have only changed in form, and their functions have not changed much. During use, today's LC-MS sampling devices require manual injection, and manual injection will have many operational problems, resulting in operational errors, affecting the final test results. At the same time, manual injection is slow, affecting detection efficiency.

[0003] Chinese patent CN217466817U discloses a liquid chromatography-mass spectrometer sampling device, including a device body, the device body includes a bottom plate, mounting ears are arranged on both sides of the bottom plate, a sampling channel is arranged on the top of the bottom plate located on one side of the sample tray, an eight-way valve is arranged on the top of the sampling channel, and a plurality of evenly distributed through holes are opened on the top surface of the eight-way valve, a supporting vertical rod is arranged on the other side of the top of the bottom plate away from the sample tray, a supporting cross bar is arranged on the top of the supporting vertical rod, a motor is arranged on one side of the supporting cross bar, a threaded rod is arranged inside the supporting cross bar, a sliding block is arranged on the outer side of the threaded rod, and a fast sampling structure for fast sampling of the device is arranged under the supporting cross bar. By setting the fast sampling structure, when the device is used, manual sampling is not required, so as to avoid operational problems and errors, improve the accuracy of the test results, and at the same time improve the sampling speed and detection efficiency.

[0004] However, the above technical solution still has the following defects: the number of samples that can be placed on the sample tray is fixed, and it is generally used for batch processing. After all the samples are placed at one time, automatic sampling begins. However, if samples need to be added in the middle or the number of samples is too large, the test needs to be paused and the sample tray needs to be taken out for replenishment, which affects the progress of the entire test. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a sample injection device for a liquid-mass spectrometer, which can perform temporary sample injection testing or additional sample injection at any time without taking out the sample injection tray for sample injection and without affecting the original sample placement sequence, and is flexible and convenient to operate.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A sampling device for a liquid-mass spectrometer comprises an instrument body, a sampling tray and a sampling needle, wherein an auxiliary sampling assembly is arranged on the side of the sampling tray, and a positioning assembly is arranged corresponding to the sampling needle; the auxiliary sampling assembly comprises an arc-shaped annular conveyor belt, a bracket is arranged at the bottom of the annular conveyor belt, a supporting platform is arranged at the bottom of the bracket, and a lifting electric cylinder is arranged at the bottom of the supporting platform; a telescopic bracket is arranged at the bottom of the sampling tray, and a telescopic electric cylinder is connected to the telescopic bracket.

[0008] Furthermore, the positioning assembly includes clamping plates symmetrically arranged on both sides of the endless conveyor belt, the clamping plates are connected to push-pull electric cylinders, the push-pull electric cylinders are fixedly installed inside the instrument body, and the clamping plates are located below the sampling needle.

[0009] Furthermore, an annular baffle is provided above the annular conveyor belt.

[0010] Furthermore, a plurality of card seats are evenly spaced on the annular conveyor belt, a silicone gasket is provided on the inner wall of the card seat, and the injection bottle is placed in the card seat.

[0011] Furthermore, a dustproof door is provided on the instrument body.

[0012] Beneficial effects of the utility model:

[0013] In actual use scenarios, this instrument is designed with a telescopic bracket based on the design of a conventional sample tray, so that when temporary sample addition or continuous sample replenishment is required, the telescopic electric cylinder is controlled to drive the telescopic bracket to move the sample tray away, so that the circular conveyor belt is exposed and located below the sampling needle, and the lifting electric cylinder is controlled to lift the circular conveyor belt to a height at which the sampling needle can perform sampling. The conveying speed and pause time of the circular conveyor belt are set, and the sample bottle to be tested is placed on the circular conveyor belt, and the auxiliary sample injection component is started to start conveying the sample bottle into the instrument for sampling. When the sample bottle reaches the sampling position of the sampling needle, the positioning component is controlled to temporarily fix the sample bottle to be sampled for sampling. A part of the circular conveyor belt is located outside the test chamber of the instrument, which is convenient for placing samples at hand, and the tested sample bottles can be promptly transported out with the circular conveyor belt for recycling, which does not affect the sustainable use of the auxiliary sample injection component. The utility model does not need to take out the sample tray for sample addition, and does not affect the original sample placement order. Temporary sample addition testing or additional sample addition can be performed at any time, and the operation is flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the internal top view structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the sample injection part of the instrument of the utility model. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0017] like Figure 1-2 As shown, the utility model provides a sampling device for a liquid-mass spectrometer, comprising an instrument body 1, a sampling tray 2 and a sampling needle 3, wherein an auxiliary sampling assembly 4 is provided on the side of the sampling tray 2, and a positioning assembly 5 is provided corresponding to the sampling needle 3; the auxiliary sampling assembly 4 comprises an arc-shaped annular conveyor belt 41, a bracket 42 is provided at the bottom of the annular conveyor belt 41, a supporting platform 43 is provided at the bottom of the bracket 42, and a lifting electric cylinder 44 is provided at the bottom of the supporting platform 43; a telescopic bracket 21 is provided at the bottom of the sampling tray 2, and a telescopic electric cylinder 22 is connected to the telescopic bracket 21.

[0018] In this embodiment, the instrument is designed with a telescopic bracket 21 on the basis of a conventional sample tray design, so that when temporary sample addition or continuous sample replenishment is required, the telescopic electric cylinder 22 is controlled to drive the telescopic bracket 21 to move the sample tray 2, so that the circular conveyor 41 is exposed and located below the sampling needle 3, and the lifting electric cylinder 44 is controlled to lift the circular conveyor 41 to a height at which the sampling needle 3 can take samples, and the conveying speed and pause time of the circular conveyor 41 are set, and the sample bottles to be tested are placed on the circular conveyor 41, and the auxiliary injection component 4 is started to start conveying the sample bottles into the sample tray. The sample bottle is put into the instrument for sampling. When the sample bottle reaches the sampling position of the sampling needle 3, the control positioning assembly 5 temporarily fixes the sample bottle that needs to be sampled for sampling. A part of the circular conveyor 41 is located outside the test chamber of the instrument, which is convenient for placing samples at hand, and the tested sample bottles can be promptly conveyed out with the circular conveyor 41 for recycling, which does not affect the sustainable use of the auxiliary injection assembly 4; the various electrical components therein are designed with corresponding control circuits, which are connected to the control motherboard of the instrument body for control. The control circuit is not within the scope of protection required by this application, so it will not be described in detail. The device does not need to take out the sample tray for sampling, and does not affect the original sample placement order. Temporary sampling tests or additional sampling can be performed at any time, and the operation is flexible and convenient.

[0019] like Figure 2 As shown, the positioning assembly 5 includes clamping pieces 51 symmetrically arranged on both sides of the circular conveyor belt, and the clamping pieces 51 are connected to a push-pull electric cylinder 52, and the push-pull electric cylinder 52 is fixedly installed inside the instrument body 1, and the clamping piece 51 is located below the sampling needle 3; in this embodiment, the clamping piece 51 is arc-shaped, and the two pieces symmetrically clamp and fix the sample bottle temporarily, which is convenient for the sampling needle 3 to sample, and the push-pull electric cylinder 52 is used for control, which is convenient and quick.

[0020] like Figure 2 As shown, an annular baffle 45 is provided above the annular conveyor belt 41; in this embodiment, the annular baffle 45 includes two groups, inner and outer, for forming a limiting enclosure during the conveyance of the sample bottles to prevent the sample bottles from tipping over during the sample injection process and affecting the sample injection.

[0021] like Figure 2 As shown, a plurality of holders 46 are evenly spaced on the annular conveyor belt 41 , the inner wall of the holder 46 is provided with a silicone gasket, and the injection bottle is placed in the holder 46 ; in this embodiment, a certain distance is retained between adjacent holders 46 to ensure the normal fixation of the positioning component 5 .

[0022] like Figure 1 As shown, a dustproof door 11 is provided on the instrument body 1; in this embodiment, the dustproof door 11 can be opened at any time for sample replenishment, and one end of the circular conveyor belt 41 is close to the inner side of the dustproof door 11, so that the sample bottle can be taken and placed at any time.

[0023] To facilitate observation of the internal structure, some conventional bracket installation structures are not fully shown in the accompanying drawings.

[0024] All technical features in this embodiment can be modified in appearance according to actual needs.

[0025] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A sample injection device for a liquid chromatography-mass spectrometer, comprising an instrument body (1), a sample injection plate (2) and a sampling needle (3), characterized in that: An auxiliary injection assembly (4) is provided on the side of the injection plate (2), and a positioning assembly (5) is provided corresponding to the sampling needle (3); The auxiliary injection assembly (4) comprises an arc-shaped annular conveyor belt (41), a bracket (42) is provided at the bottom of the annular conveyor belt (41), a support platform (43) is provided at the bottom of the bracket (42), and a lifting electric cylinder (44) is provided at the bottom of the support platform (43); A telescopic bracket (21) is provided at the bottom of the sample feeding tray (2), and a telescopic electric cylinder (22) is connected to the telescopic bracket (21).

2. The sample injection device for liquid chromatography-mass spectrometry according to claim 1, characterized in that: The positioning assembly (5) comprises clamping plates (51) symmetrically arranged on both sides of the circular conveyor belt, the clamping plates (51) are connected to a push-pull electric cylinder (52), the push-pull electric cylinder (52) is fixedly installed inside the instrument body (1), and the clamping plates (51) are located below the sampling needle (3).

3. The sample injection device for liquid chromatography-mass spectrometry according to claim 1, characterized in that: An annular baffle (45) is provided above the annular conveyor belt (41).

4. The sample injection device for liquid chromatography-mass spectrometry according to claim 1, characterized in that: A plurality of holders (46) are evenly spaced on the annular conveyor belt (41), the inner wall of the holder (46) is provided with a silica gel gasket, and the sample injection bottle is placed in the holder (46).

5. The sample injection device for liquid chromatography-mass spectrometry according to claim 1, characterized in that: The instrument body (1) is provided with a dustproof door (11).

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