Closed gas sampler

Abstract

The utility model discloses a closed gas sampler which comprises a base and a sleeve, an inserting column is arranged on the base, the sleeve can be sleeved on the inserting column in a vertically movable mode, a gas inlet is arranged at the upper end of the sleeve, and a top cover is arranged on the gas inlet. During sampling, the sleeve can be pulled to be far away from the base, so that negative pressure is generated in the sleeve, sampling air can enter the sleeve through the air inlet, and the sampling purity is prevented from being influenced by external air in a sampling container.

Description

Technical Field

[0001] The utility model relates to the technical field of gas sampling, in particular to a closed gas sampler. Background Art

[0002] Gas sampling is mostly carried out using bottle-like containers, which are filled with outside gas before sampling. When the sampling space is opened for sampling, outside air will diffuse in the sampling space, affecting the purity of the gas sample. Therefore, a method is needed to reduce the impact of outside air on the purity of the sampled air. Utility Model Content

[0003] The purpose of the utility model is to avoid the deficiencies of the prior art and provide a closed gas sampler, thereby effectively solving the deficiencies in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a closed gas sampler, including a base and a sleeve, the base is provided with a plug post, the sleeve can be moved up and down on the plug post, the upper end of the sleeve is provided with an air inlet, and a top cover is provided on the air inlet.

[0005] Furthermore, the outer edge of the sleeve is provided with a side edge.

[0006] Furthermore, two pedals are arranged on both sides of the bottom of the base.

[0007] Furthermore, the pedal is hingedly arranged at the bottom of the base.

[0008] Furthermore, a sealing ring is provided on the outer edge of the plug post.

[0009] Furthermore, a plurality of notches are provided at the bottom of the sleeve, and a clamp is provided at the outer edge of the bottom of the sleeve.

[0010] Furthermore, a fixing groove is provided on the outer side of the sleeve to cooperate with the clamp.

[0011] Furthermore, a cavity is provided in the plug post.

[0012] The above technical solution of the utility model has the following beneficial effects: when sampling, the utility model can pull the sleeve away from the base to generate negative pressure in the sleeve, and the sampled air can enter the sleeve through the air inlet, thereby avoiding the presence of external air in the sampling container and affecting the sampling purity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the utility model;

[0014] Figure 2 It is a bottom schematic diagram of the notch of an embodiment of the utility model. DETAILED DESCRIPTION

[0015] The following is a detailed description of the preferred implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0016] In the description of the present utility model, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0017] like Figure 1-2 As shown, a closed gas sampler of the present embodiment comprises a base 1 and a sleeve 2, wherein a plug post 3 is arranged on the base 1, and the sleeve 2 can be movably sleeved on the plug post 3 up and down, and an air inlet 4 is arranged on the upper end of the sleeve 2, and a top cover 5 is arranged on the air inlet 4; when in use, the sampler is placed in the sampling space, and then the top cover 5 on the air inlet 4 is opened, and the sleeve 2 is pulled upward to form a negative pressure between the sleeve 2 and the plug post 3, and the air can enter the sleeve 2 from the air inlet 4 for collection, thereby avoiding the presence of outside air in the sampling container and affecting the sampling purity;

[0018] Preferably, the outer edge of the sleeve 2 is provided with a side edge 6, and the top cover 5 can be pulled up through the side edge 6;

[0019] Preferably, two pedals 7 are provided on both sides of the bottom of the base 1. When pulling up the sleeve 2, the pedals 7 can be stepped on to avoid pulling up the base 1 together;

[0020] Preferably, the pedal 7 is hingedly arranged at the bottom of the base 1. When not in use, the pedal 7 can be rotated and folded on the side wall of the base 1 to reduce the occupied space and facilitate carrying;

[0021] Preferably, a sealing ring 8 is provided on the outer edge of the plug post 3 to improve the sealing between the sleeve 2 and the plug post 3;

[0022] Preferably, a plurality of notches 9 are provided at the bottom of the sleeve 2, and a clamp 10 is provided at the outer edge of the bottom of the sleeve 2. After the sleeve 2 is pulled out, the bottom of the sleeve 2 is clamped by the clamp 10 to fix the sleeve 2 on the plug post 3, thereby preventing the sleeve 2 from sliding on the plug post 3 and ensuring that the gas in the sleeve 2 is not discharged;

[0023] Preferably, a fixing groove 11 is provided on the outer side of the sleeve 2 to cooperate with the clamp 10, so as to facilitate the positioning of the clamp 10;

[0024] Preferably, a cavity is provided in the plug post 3, so as to reduce the weight of the sampler and facilitate carrying.

[0025] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A closed gas sampler, characterized in that: It comprises a base and a sleeve, wherein the base is provided with an inserting column, the sleeve can be movably sleeved on the inserting column up and down, an air inlet is provided at the upper end of the sleeve, and a top cover is provided on the air inlet.

2. A closed gas sampler according to claim 1, characterized in that: The outer edge of the sleeve is provided with a side edge.

3. A closed gas sampler according to claim 1, characterized in that: Two pedals are arranged on both sides of the bottom of the base.

4. A closed gas sampler according to claim 3, characterized in that: The pedal is hingedly arranged at the bottom of the base.

5. A closed gas sampler according to claim 1, characterized in that: A sealing ring is arranged on the outer edge of the plug post.

6. A sealed gas sampler according to claim 1, characterized in that: The bottom of the sleeve is provided with a plurality of notches, and the outer edge of the bottom of the sleeve is provided with a clamp.

7. A sealed gas sampler according to claim 6, characterized in that: The outer side of the sleeve is matched with the clamp to be provided with a fixing groove.

8. A sealed gas sampler according to claim 1, characterized in that: A cavity is arranged in the plug post.

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