Isotope gas sampling device

Abstract

The utility model relates to the technical field of gas sampling devices, and provides an isotope gas sampling device which comprises a sample bottle body, a piston, a breather pipe and a valve, the sample bottle body is cylindrical, an opening is formed in the top of the sample bottle body, the piston is arranged in the opening in a sliding mode and used for adjusting the volume of the sample bottle body, and the breather pipe is arranged on the sample bottle body and communicated with the sample bottle body. The two breather pipes are respectively positioned on two sides of the sample bottle body, and a valve is arranged on each breather pipe and is used for controlling the on-off of the breather pipe. According to the technical scheme, the technical problems of fixed volume and poor universality of the gas sampling device in the prior art are solved.

Description

Technical Field

[0001] The embodiments of this disclosure relate to the field of gas sampling device technology, and more specifically, to an isotope gas sampling device. Background Technology

[0002] Accurate measurement of carbon and nitrogen isotope values ​​in gaseous samples is crucial in numerous fields, including earth sciences, environmental sciences, life sciences, and industrial production. Carbon and nitrogen isotope analysis provides key information for studying geochemical cycles, ecosystem material cycles, environmental change, and industrial product quality control.

[0003] When measuring the carbon and nitrogen isotope values ​​of gas samples, the main function of the gas injection device is to accurately and effectively transfer the gas sample into the measuring instrument. The specific operating procedure is as follows: First, open the valve of the injection device to introduce the sample gas into the device, then close the valve to complete the collection of the gas sample. Next, install the injection device containing the gas sample onto the measuring instrument, and then open the valve again to allow the sample gas to smoothly enter the measuring instrument for carbon and nitrogen isotope value measurement.

[0004] To ensure accurate and reliable measurement results, the concentration of the gas sample entering the instrument is subject to certain requirements. Typically, the volume of the sample introduction device is designed to be a fixed value, such as 100 ml. Provided the gas sample concentration meets the instrument's requirements, a 100 ml gas sample can generate a suitable measurement signal, thus guaranteeing the accuracy and reliability of the measurement results.

[0005] When encountering samples with excessively high or low gas concentrations, if the gas sample is still filled to a fixed volume (e.g., 100 ml), the amount of gas entering the measuring instrument will not match the optimal measurement concentration required by the instrument. If the gas concentration is too high, the measuring instrument's measurement signal will be too high, exceeding the instrument's linear response range, resulting in inaccurate measurement results; if the gas concentration is too low, the measuring instrument's measurement signal will be too low, making it impossible to obtain valid measurement data.

[0006] The inaccuracy or even inability to measure due to the fixed volume of the sample introduction device has brought many problems to the actual carbon and nitrogen isotope measurement work. There is an urgent need to develop an isotope gas introduction device that can flexibly adjust the volume to adapt to gas samples of different concentrations. Utility Model Content

[0007] To overcome the above-mentioned defects, the embodiments of this disclosure provide an isotope gas injection device, which solves the technical problem of fixed volume and poor versatility of gas injection devices in related technologies.

[0008] According to one aspect, at least one embodiment of this disclosure provides an isotope gas injection device, including a sample bottle, a piston, a vent tube, and a valve. The sample bottle is cylindrical and has an opening at the top. The piston is slidably disposed within the opening for adjusting the volume of the sample bottle. The vent tube is disposed on and communicates with the sample bottle. There are two vent tubes, each located on one side of the sample bottle. Each vent tube is provided with the valve, which is used to control the opening and closing of the vent tube.

[0009] For example, an isotope gas sampling device provided in at least one embodiment of this disclosure further includes:

[0010] The sample bottle is a transparent glass bottle, and the outer wall of the sample bottle has scale lines for displaying the volume.

[0011] For example, an isotope gas sampling device provided in at least one embodiment of this disclosure further includes:

[0012] The sample bottle is provided with a support plate at the top, and a screw is threadedly connected to the support plate. The screw is coaxial with the piston, and the bottom end of the screw is rotatably connected to the piston by means of a bearing. The screw is used to drive the piston to slide.

[0013] For example, an isotope gas sampling device provided in at least one embodiment of this disclosure further includes:

[0014] The support plate has a positioning hole one, the side wall of the sample bottle has a positioning hole two, and a positioning pin is also included. The positioning pin is used to pass through the positioning hole one and the positioning hole two at the same time to position the support plate onto the sample bottle.

[0015] For example, an isotope gas sampling device provided in at least one embodiment of this disclosure further includes:

[0016] The piston has a connecting rod on its top end face. There are multiple connecting rods evenly distributed along the circumference of the piston, and each connecting rod has a pressing part at its top end.

[0017] For example, an isotope gas sampling device provided in at least one embodiment of this disclosure further includes:

[0018] The valve includes a valve plate and a valve stem. The valve plate is rotatably disposed inside the vent pipe, and the valve stem is disposed on the valve plate and located outside the vent pipe. The valve plate is configured to rotate under the drive of the valve stem to control the opening and closing of the vent pipe.

[0019] For example, an isotope gas sampling device provided in at least one embodiment of this disclosure further includes:

[0020] It also includes a linkage rod, which has a pin at both ends and a hole on the valve stem. The two pins are detachably inserted into the holes of the two valve stems so that the two valve stems can rotate synchronously.

[0021] For example, an isotope gas sampling device provided in at least one embodiment of this disclosure further includes:

[0022] The sample bottle has a rubber ring at the bottom.

[0023] The beneficial effects of the embodiments disclosed herein are as follows:

[0024] In this disclosure, when using the isotope gas sampling device, the volume of the sample vial is first adjusted according to the gas sample concentration. The operator slides the piston downwards or upwards along the top opening of the sample vial using the handle on the piston top. When the estimated gas sample concentration is high, the piston is slid downwards to reduce the volume of the sample vial, for example, adjusting the maximum achievable volume (assuming 100 ml) to 50 ml or lower, to avoid the measurement signal exceeding the instrument's linear response range due to excessively high gas concentration. When the gas sample concentration is low, the piston is slid upwards to increase the volume of the sample vial, such as adjusting the volume to 150 ml or more, to obtain a sufficiently strong measurement signal. After adjusting the sample vial volume, two valves are opened; one valve introduces the gas sample into the sample vial, while the other valve expels air from inside the sample vial. Once the sample vial is full of gas, both valves are closed, completing the gas sample collection. Next, the sample introduction device is installed on the measuring instrument, and the gas inlets on both sides are connected to the measuring instrument. Then, the valves on both sides are opened to allow the gas sample to enter the measuring instrument through the gas inlets for carbon and nitrogen isotope value measurement.

[0025] By adjusting the volume of the sample vial with a piston, the amount of gas entering the measuring instrument can be controlled according to the concentration of the gas sample, so that the measuring instrument obtains a measurement signal of appropriate intensity. This avoids the problem of inaccurate measurement caused by excessively high or low gas concentration, and improves the accuracy of carbon and nitrogen isotope value measurement. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0027] Figure 1 This is a schematic diagram of an isotope gas sampling device at an angle in one embodiment of the present disclosure.

[0028] Figure 2 for Figure 1 A schematic diagram of the structure of an isotope gas sampling device from another angle in one embodiment;

[0029] Figure 3 for Figure 1 A schematic diagram of the explosion structure of an isotope gas sampling device in one embodiment;

[0030] Figure 4 for Figure 1 The internal structure diagram of the sample bottle is shown in the embodiment using the connecting rod and pressing part.

[0031] In the diagram: 1. Sample bottle body, 2. Piston, 3. Vent tube, 4. Valve, 101. Opening, 102. Scale line, 5. Support plate, 6. Screw, 7. Bearing, 501. Positioning hole one, 103. Positioning hole two, 8. Positioning pin, 9. Connecting rod, 10. Pressing part, 401. Valve plate, 402. Valve stem, 11. Linkage rod, 1101. Insert post, 4021. Insertion hole, 12. Rubber ring. Detailed Implementation

[0032] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0033] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0034] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0035] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0037] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] like Figures 1-4 As shown, an isotope gas sampling device is illustrated in one embodiment of the present disclosure. In this embodiment, to address the problems of fixed volume and poor versatility of existing gas sampling devices, an isotope gas sampling device is designed. By adjusting the volume of the sample bottle 1, it can adapt to gas samples of different concentrations, thereby improving the accuracy of measurement and the versatility of the gas sampling device.

[0039] The sample vial 1 is made of borosilicate glass, a material with excellent chemical stability that does not react chemically with common gas samples. The sample vial 1 is cylindrical, facilitating smooth sliding of the piston 2 and simplifying processing and manufacturing. The piston 2 is also cylindrical, with an outer diameter slightly larger than the inner diameter of the opening 101 of the sample vial 1. It is installed within the opening 101 via an interference fit, ensuring a good seal. A handle on the top of the piston 2 allows the operator to easily control its position within the sample vial 1, thereby adjusting the volume of the sample vial 1. Two vent pipes 3 are symmetrically positioned on either side of the sample vial 1.

[0040] When using this isotope gas injection device, the volume of sample vial 1 is first adjusted according to the gas sample concentration. The operator slides piston 2 up or down along the top opening 101 of sample vial 1 using the handle on top of piston 2. When the estimated gas sample concentration is high, piston 2 is slid downwards to reduce the volume of sample vial 1, for example, adjusting the maximum achievable volume (assuming 100 ml) to 50 ml or lower, to avoid the measurement signal exceeding the instrument's linear response range due to excessively high gas concentration. When the gas sample concentration is low, piston 2 is slid upwards to increase the volume of sample vial 1, such as adjusting it to 150 ml or more, to obtain a sufficiently strong measurement signal. After adjusting the volume of sample vial 1, both valves 4 are opened. One valve 4 introduces the gas sample into sample vial 1, while the other valve 4 expels air from inside sample vial 1. Once sample vial 1 is full of gas, both valves 4 are closed, completing the gas sample collection. Next, the sample introduction device is installed on the measuring instrument, and the two gas inlets 3 are connected to the measuring instrument. Then, the valves 4 on both sides are opened to allow the gas sample to enter the measuring instrument through the gas inlet 3 for carbon and nitrogen isotope value measurement.

[0041] By adjusting the volume of sample bottle 1 using piston 2, the amount of gas entering the measuring instrument can be controlled according to the concentration of the gas sample, so that the measuring instrument obtains a measurement signal of appropriate intensity, avoiding the problem of inaccurate measurement caused by excessively high or low gas concentration, and improving the accuracy of carbon and nitrogen isotope value measurement.

[0042] In some examples, such as Figures 1-3 As shown, the sample bottle 1 is designed to be transparent, allowing operators to directly observe the position of the internal piston 2 through the bottle, avoiding over- or under-adjustment and ensuring the accuracy of volume adjustment. The scale lines 102 are used to divide and mark the height of the sample bottle 1 according to the volume ratio, thus intuitively understanding the current volume of the sample bottle 1.

[0043] In some examples, such as Figures 1-3 As shown, in this embodiment, the control method of piston 2 in the isotope gas injection device is optimized. By setting a combination structure of support plate 5, screw 6 and bearing 7 on the top of sample bottle 1, convenient control of piston 2 lifting and lowering is achieved.

[0044] A support plate 5 is fixedly mounted on the top of the sample bottle 1. A threaded hole is located at the center of the support plate 5, coaxial with the central axis of the sample bottle 1, for threaded connection with the screw 6. The top of the screw 6 has a knob-like operating part for easy gripping and rotation by the operator. The bottom end of the screw 6 is rotatably connected to the piston 2 via a bearing 7, allowing the screw 6 to drive the piston 2 to slide up and down during rotation. The threaded design provides high precision, allowing the operator to more accurately control the movement distance of the piston 2, thereby achieving precise adjustment of the volume of the sample bottle 1.

[0045] In some examples, such as Figure 3 As shown, in this embodiment, the support plate 5 is detachably connected by setting positioning hole 501, positioning hole 103 and positioning pin 8, which facilitates the maintenance of the device and the replacement of components.

[0046] Positioning holes 501, which are circular in shape, are provided on the support plate 5. Positioning holes 103, also circular, are provided on the side wall of the sample bottle 1 at the positions corresponding to positioning holes 501. Positioning pin 8 is cylindrical, and its length is slightly greater than the sum of the thickness of the support plate 5 and the side wall thickness of the sample bottle 1, to ensure that positioning pin 8 can completely pass through positioning holes 501 and 103, achieving reliable positioning.

[0047] When it is necessary to install the support plate 5 onto the sample bottle body 1, place the support plate 5 on top of the sample bottle body 1, aligning the first positioning hole 501 with the second positioning hole 103. Then, insert the positioning pin 8 through the first positioning hole 501 and into the second positioning hole 103, thereby positioning the support plate 5 on the sample bottle body 1. When it is necessary to replace the piston 2 or to perform maintenance on the device, simply pull out the positioning pin 8 to remove the support plate 5 from the sample bottle body 1, thus facilitating the replacement of the piston 2.

[0048] In some examples, such as Figure 4 As shown, multiple connecting rods 9 are provided on the top end face of the piston 2, and these connecting rods 9 are evenly distributed along the circumference of the piston 2. The top ends of the multiple connecting rods 9 are connected to a pressing part 10, which is convenient for the operator to hold or press by hand.

[0049] When the piston 2 needs to be controlled by direct push or pull, the operator can push or pull the pressing part 10. Since multiple connecting rods 9 are evenly distributed around the piston 2, the applied force can be evenly transmitted to the piston 2, avoiding the piston 2 tilting or jamming due to uneven force.

[0050] In addition to the screw 6 drive, a direct push-pull control method for piston 2 is provided. When the operation precision requirement is not particularly high, but the position of piston 2 needs to be quickly adjusted, the direct push-pull method is more convenient and efficient, and can meet diverse operation needs.

[0051] In some examples, such as Figure 3 As shown, in this embodiment, valve 4 consists of valve plate 401 and valve stem 402. Valve plate 401 is circular, and its diameter matches the inner diameter of vent pipe 3. The edge of valve plate 401 has a sealing ring, providing good sealing performance. Valve plate 401 can rotate to fit tightly against the inner wall of vent pipe 3, blocking gas flow. Valve stem 402 is connected to valve plate 401, with one end fixedly connected to the center of valve plate 401 and the other end extending to the outside of vent pipe 3 for easy operation by the operator.

[0052] In some examples, such as Figures 1-3 As shown, in this embodiment, in order to meet the requirements of the isotope gas sampling device for valve 4 control under different operating scenarios, a structure is designed to realize the synchronous opening and closing of valve stems 402 on both sides through linkage rod 11. Moreover, the linkage rod 11 is detachable, which improves the flexibility of operation.

[0053] When both valve stems 402 need to be opened or closed simultaneously, i.e., to achieve synchronous operation, the inserts 1101 at both ends are inserted into the insertion holes 4021 on the two valve stems 402 respectively. When one valve stem 402 is rotated, the linkage rod 11 transmits the power to the other valve stem 402, realizing the synchronous opening and closing of the two valves 4. When it is not necessary for both valve stems 402 to open simultaneously, the linkage rod 11 is pulled out, allowing the two valve stems 402 to return to an independent operating state.

[0054] In some examples, such as Figure 2 As shown, a rubber ring 12 is provided at the bottom of the sample bottle 1. The rubber ring 12 increases the friction between the sample bottle 1 and the platform, allowing the sample bottle 1 to be placed stably. This solves the problems of stability and fragility of the glass sample bottle 1, improving the practicality and reliability of the device.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. An isotope gas sampling device, characterized in that, The sample bottle includes a sample bottle body (1), a piston (2), a vent tube (3), and a valve (4). The sample bottle body (1) is cylindrical and has an opening (101) at the top. The piston (2) is slidably disposed in the opening (101) and is used to adjust the volume of the sample bottle body (1). The vent tube (3) is disposed on the sample bottle body (1) and is connected to the sample bottle body (1). There are two vent tubes (3) and they are located on both sides of the sample bottle body (1). Each vent tube (3) is provided with a valve (4), and the valve (4) is used to control the opening and closing of the vent tube (3).

2. The isotope gas sampling device according to claim 1, characterized in that, The sample bottle (1) is a transparent glass bottle, and the outer wall of the sample bottle (1) has scale lines (102) for displaying the volume.

3. The isotope gas sampling device according to claim 1, characterized in that, The sample bottle body (1) is provided with a support plate (5) at the top, and a screw (6) is threadedly connected to the support plate (5). The screw (6) is coaxial with the piston (2). The bottom end of the screw (6) is rotatably connected to the piston (2) by means of a bearing (7). The screw (6) is used to drive the piston (2) to slide.

4. The isotope gas sampling device according to claim 3, characterized in that, The support plate (5) has a positioning hole one (501), the side wall of the sample bottle (1) has a positioning hole two (103), and also includes a positioning pin (8). The positioning pin (8) is used to pass through the positioning hole one (501) and the positioning hole two (103) at the same time to position the support plate (5) onto the sample bottle (1).

5. An isotope gas sampling device according to claim 1, characterized in that, The piston (2) has a connecting rod (9) on its top end face. There are multiple connecting rods (9) and they are evenly distributed along the circumference of the piston (2). The top ends of the multiple connecting rods (9) are provided with pressing parts (10).

6. The isotope gas sampling device according to claim 1, characterized in that, The valve (4) includes a valve plate (401) and a valve stem (402). The valve plate (401) is rotatably disposed inside the vent pipe (3). The valve stem (402) is disposed on the valve plate (401) and located outside the vent pipe (3). The valve plate (401) is configured to rotate under the drive of the valve stem (402) to control the opening and closing of the vent pipe (3).

7. An isotope gas sampling device according to claim 6, characterized in that, It also includes a linkage rod (11), both ends of which have inserts (1101), and the valve stem (402) has a socket (4021). The two inserts (1101) are detachably inserted into the sockets (4021) of the two valve stems (402) respectively, so that the two valve stems (402) can rotate synchronously.

8. An isotope gas sampling device according to claim 2, characterized in that, The sample bottle (1) has a rubber ring (12) at the bottom.

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