Headspace sampler temperature calibration device

Abstract

The utility model relates to a temperature calibration device for a headspace sample injector, which comprises a machine body, a detection chamber is arranged in the machine body, and a turntable is arranged in the detection chamber; the turntable is driven by a driving mechanism to move and rotate; the driving mechanism comprises a lead screw rotationally installed in the machine body, the lead screw is located below the rotary disc and driven by a lead screw motor, a sliding sleeve is installed on the periphery of the lead screw in a threaded mode and connected with the bottom of a rotary disc motor, and the rotary disc motor moves at the bottom of the detection cavity through a guide mechanism. Through cooperation of a lead screw, a sliding sleeve and a moving block in the moving assembly, under rotation of the driving motor, the rotating disc can be driven to move horizontally and move out of the interior of the detection cavity, then a sample frame and a sample placing cylinder which are placed on the top of the rotating disc are taken down, and the sample frame filled with sample bottles is replaced. By means of the design that a plurality of sample bottles are placed at a time, working efficiency during sample analysis is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of analytical instrument technology and relates to a calibration device for headspace sampler temperature. Background Technology

[0002] A headspace sampler is a sample pretreatment device for gas chromatography. Its principle is to place a liquid or solid sample in a sealed container, achieve gas-liquid (or gas-solid) equilibrium at a specific temperature, and then directly inject the gas sample from the top into the gas chromatograph for analysis. Its main functions are: 1. Simplifying the pretreatment process for complex samples, avoiding cumbersome extraction and concentration steps, and reducing sample loss and impurity introduction; 2. Applicable to the detection of various substances such as volatile organic compounds (VOCs), pesticide residues, and environmental pollutants, improving analytical efficiency and accuracy; 3. Enabling quantitative analysis without damaging the sample matrix, and widely used in food, environmental, and pharmaceutical fields.

[0003] Existing headspace samplers cannot place multiple sample vials at once; only one vial can be placed at a time, resulting in low efficiency and affecting analytical results. Furthermore, most existing headspace samplers use a common heating method, which can lead to uneven heat distribution and affect the accuracy of sample analysis. Summary of the Invention

[0004] The purpose of this invention is to provide a headspace sampler temperature calibration device that can solve the above-mentioned problems and greatly improve the efficiency of sample analysis.

[0005] According to the technical solution provided by this utility model: a headspace sampler temperature calibration device includes a body, a detection chamber in the body, and a turntable in the detection chamber; the turntable is driven by a drive mechanism to move and rotate; the drive mechanism includes a lead screw rotatably installed in the body, the lead screw is located below the turntable, the lead screw is driven by a lead screw motor, a sliding sleeve is threaded on the outer circumference of the lead screw, the sliding sleeve is connected to the bottom of the turntable motor, and the turntable motor moves at the bottom of the detection chamber through a guide mechanism; the turntable motor is vertically arranged, and the output shaft of the turntable motor is connected to the bottom of the turntable; a sample cylinder is placed in the turntable, and a heating component is installed in the turntable.

[0006] As a further improvement of this utility model, a movable block is provided on the sliding sleeve, and the movable block is fixedly connected to the bottom of the turntable motor.

[0007] As a further improvement of this utility model, the lead screw motor is mounted on the machine body, and the output end of the lead screw motor is connected to the end of the lead screw to drive the lead screw to rotate.

[0008] As a further improvement of this utility model, the guiding mechanism includes guide grooves symmetrically arranged at the bottom of the detection chamber, and a matching guide plate is provided on the turntable motor housing, the guide plate sliding in the guide groove.

[0009] As a further improvement of this utility model, sample holes are evenly distributed in a ring around the top of the turntable, and several sample tubes are arranged in a matching ring and connected by a sample holder, with the sample tubes and sample holes being compatible.

[0010] As a further improvement of this utility model, the sample holder is placed on top of the turntable and is circular in shape.

[0011] As a further improvement of this utility model, the heating component includes several annularly distributed heating rings, which are connected by an intermediate disk; heating wires are fixedly connected inside the heating rings.

[0012] As a further improvement to this utility model, the heating ring is made of copper.

[0013] The positive and progressive effects of this application are as follows:

[0014] 1. This utility model, through the cooperation of the lead screw, sliding sleeve and moving block in the moving component, can drive the turntable to move horizontally under the rotation of the drive motor, move the turntable out of the detection chamber, and then remove the sample rack and sample placement cylinder placed on the top of the turntable and replace them with a sample rack full of sample bottles, thereby achieving the purpose of quickly placing sample bottles. This utility model, by utilizing the design of placing multiple sample bottles at once, greatly improves the working efficiency during sample analysis.

[0015] 2. This utility model uses an array of heating rings to heat each sample vial individually, improving the accuracy of sample vial analysis and thus achieving the purpose of temperature calibration. The inspection cover allows for the inspection of the internal structure of the turntable. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention.

[0017] Figure 2 This is a partial exploded view of the structure of this utility model.

[0018] Figure 3 for Figure 2 A magnified view of region A in the middle.

[0019] Figure 4 This is a partial structural diagram of the sample cylinder mounted on the turntable of this utility model.

[0020] Figure 5 An exploded view of the structure of the sample cylinder mounted on the disc in this utility model. Detailed Implementation

[0021] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein. Furthermore, terms such as "comprising" and "having" mean that in addition to those already listed in "comprising" and "having," other unlisted contents may also be included; for example, a process, method, system, product, or device may include a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0024] Due to the angle of the drawing, some parts may not be drawn, but their positions and connections can be understood from the text descriptions.

[0025] like Figures 1-2 As shown, this utility model is a headspace sampler temperature calibration device, including a body 1, a detection chamber in the body 1, and a turntable 2 in the detection chamber; the turntable 2 is driven by a drive mechanism to realize movement and rotation.

[0026] The drive mechanism includes a lead screw 3 rotatably mounted in the body 1, located below the turntable 2. The lead screw 3 is driven by a lead screw motor 7. A sliding sleeve 4 is threaded onto the outer circumference of the lead screw 3, and the sliding sleeve 4 is connected to the bottom of the turntable motor 6. The turntable motor 6 moves at the bottom of the detection chamber via a guide mechanism. The turntable motor 6 is vertically positioned, and its output shaft is connected to the bottom of the turntable 2. A sample cylinder 9 is placed in the turntable 2, and a heating assembly is installed in the turntable 2.

[0027] like Figure 3 As shown, the sliding sleeve 4 is provided with a movable block 5, which is fixedly connected to the bottom of the turntable motor 6.

[0028] The lead screw motor 7 is mounted on the machine body 1. The output end of the lead screw motor 7 is connected to the end of the lead screw 3, which drives the lead screw 3 to rotate.

[0029] The guiding mechanism includes guide grooves 13 symmetrically arranged at the bottom of the detection chamber, and a matching guide plate 14 provided on the housing of the turntable motor 6, which slides in the guide grooves 13. The guide grooves 13 and the guide plate 14 guide the turntable motor 6, enabling it to move smoothly horizontally.

[0030] like Figure 4 As shown, sample holes 2-1 are evenly distributed in a ring around the top of the turntable 2. Several sample tubes 9 are arranged in a matching ring and connected by a sample holder 8. The sample tubes 9 are adapted to the sample holes 2-1. The sample holder 8 is placed on top of the turntable 2 and can be flexibly placed and removed. It is circular in shape.

[0031] The heating assembly includes several evenly distributed annular heating rings 11, which are connected by an intermediate disk 10. Heating wires are fixedly connected inside each heating ring 11 for heating. The heating rings 11 are made of copper for rapid heat conduction. The number of sample holes 2-1, sample cylinder 9, and heating rings 11 are the same and can be selected according to requirements. Each heating ring 11 heats the sample individually.

[0032] like Figure 5 As shown, mounting blocks 15 are symmetrically fixed around the perimeter of the inspection cover 12. Bolts are threaded onto the top of the mounting blocks 15, and the bottom of the bolts penetrates the mounting blocks 15 and extends into the turntable 2. A vertical rod 16 is fixedly connected to the center of the top of the inspection cover 12. A through hole 17 is opened in the center of the sample holder 8. The diameter of the through hole 17 is larger than the diameter of the vertical rod 16. The sample holder 8 is placed on the top of the inspection cover 12 through the through hole 17. A controller 18 is installed on one side of the front of the machine body 1. The controller 18 is connected to the turntable motor 6, the lead screw motor 7, and the heating ring 11 through wires. The installation blocks 15 and bolts facilitate the disassembly and assembly of the inspection cover 12. The vertical rod 16 and through hole 17 facilitate the placement of the sample holder 8. The controller 18 facilitates the use of the device.

[0033] The working principle of this utility model is as follows: The lead screw motor 7 is started by the controller 18, which drives the lead screw 3 to rotate. The lead screw 3 drives the sliding sleeve 4 to rotate, the sliding sleeve 4 drives the moving block 5 to move, the moving block 5 drives the turntable motor 6 to move, and the turntable motor 6 drives the turntable 2 to rotate, so that the turntable 2 is moved out of the detection chamber. Then, the sample rack 8 above the turntable 2 is removed and replaced with a new sample rack 8 filled with sample bottles. The removed sample rack 8 can be slowly filled with sample bottles, which can reduce the time for placing sample bottles. This utility model uses the design of placing multiple sample bottles at one time, which greatly improves the working efficiency of sample analysis.

[0034] This invention uses an array of heating rings 11 to heat each sample vial individually, improving the accuracy of sample vial analysis and thus achieving the purpose of temperature calibration.

[0035] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A headspace sampler temperature calibration device, comprising a body (1), characterized in that, The machine body (1) is provided with a detection chamber, and the detection chamber is provided with a turntable (2); the turntable (2) is driven by a drive mechanism to move and rotate; the drive mechanism includes a lead screw (3) rotatably installed in the machine body (1), the lead screw (3) is located below the turntable (2), the lead screw (3) is driven by a lead screw motor (7), the lead screw (3) is threaded with a sliding sleeve (4) on its outer circumference, the sliding sleeve (4) is connected to the bottom of the turntable motor (6), and the turntable motor (6) moves at the bottom of the detection chamber through a guide mechanism; the turntable motor (6) is vertically set, and the output shaft of the turntable motor (6) is connected to the bottom of the turntable (2); a sample tube (9) is placed in the turntable (2), and a heating component is installed in the turntable (2).

2. The headspace sampler temperature calibration device as described in claim 1, characterized in that, The sliding sleeve (4) is provided with a movable block (5), which is fixedly connected to the bottom of the turntable motor (6).

3. The headspace sampler temperature calibration device as described in claim 1, characterized in that, The lead screw motor (7) is installed on the machine body (1). The output end of the lead screw motor (7) is connected to the end of the lead screw (3) to drive the lead screw (3) to rotate.

4. The headspace sampler temperature calibration device as described in claim 1, characterized in that, The guiding mechanism includes guide grooves (13) symmetrically arranged at the bottom of the detection chamber, and a matching guide plate (14) is provided on the housing of the turntable motor (6), and the guide plate (14) slides in the guide groove (13).

5. The headspace sampler temperature calibration device as described in claim 1, characterized in that, The top of the turntable (2) has sample holes (2-1) evenly distributed in a ring around it. Several sample tubes (9) are arranged in a matching ring and connected by a sample holder (8). The sample tubes (9) are matched with the sample holes (2-1).

6. The headspace sampler temperature calibration device as described in claim 1, characterized in that, The sample holder (8) is placed on top of the turntable (2) and is circular in shape.

7. The headspace sampler temperature calibration device as described in claim 1, characterized in that, The heating assembly includes several annularly distributed heating rings (11), which are connected by an intermediate disk (10); heating wires are fixedly connected inside the heating rings (11).

8. The headspace sampler temperature calibration device as described in claim 7, characterized in that, The heating ring (11) is made of copper.

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