A gas extraction negative pressure sampler

Abstract

The utility model relates to the technical field of gas extraction, and disclose a kind of gas extraction negative pressure sampler, comprising: sampling pipe, support cylinder and the limiting cylinder fixedly connected in the both sides of support cylinder, the bottom end of sampling pipe is fixedly connected in support cylinder, the input end of sampling pipe is fixedly connected with joint, the outer side wall of joint is connected with connecting pipe threadedly;The inner chamber both sides wall of support cylinder is slidably provided with arc clamping plate, the sidewall of arc clamping plate is fixedly connected with multiple sets of limit strip, the outside of limit strip is provided with antiskid line, adjusting member for driving arc clamping plate translation is arranged in the limiting cylinder;The new scheme can reduce the situation that connecting pipe is prone to loosening when sampler is subjected to vibration or rotational force, improve the connection stability and reliability between sampler and pipeline, facilitate the disassembly and assembly of connecting pipe, and facilitate use.

Description

Technical Field

[0001] This utility model belongs to the field of gas extraction technology, specifically a negative pressure sampler for gas extraction. Background Technology

[0002] A gas extraction negative pressure sampler is a tool specifically designed to collect gas samples under negative pressure conditions. Its core function is to provide data support for gas concentration monitoring, extraction effect evaluation, and safety early warning by extracting gas samples from pipelines. A gas extraction negative pressure sampler typically consists of components such as an inlet connector, an outlet connector, a pull rod, a piston, and a gas cylinder.

[0003] Utility model patent application publication number 202420628301.8 discloses a negative pressure gas sampler, including a suction pump, a sampler, and a hose for connecting the suction pump and the sampler. The suction pump has a connector on its side, and the hose has a connecting pipe at its end. The connecting pipe has a cylindrical groove inside, with several through holes evenly distributed on the side wall of the cylindrical groove. A rubber layer is provided on the cylindrical groove. When the suction pump draws air, the gas sample enters the sampler through the cylindrical groove and through holes. After the gas enters the sampler, the rubber layer acts as a seal, preventing gas leakage from the sampler through the through holes. This ensures that the collected gas sample will not leak.

[0004] As can be seen from the aforementioned patent, there is a gas extraction negative pressure sampler, but it still has shortcomings in actual use. The most obvious one is that the connectors on the sampler are generally fixed to the pipeline by threaded connection. However, when the sampler is subjected to vibration or rotational force, the threaded connection is prone to displacement and gradually loosens over time, reducing the stability and reliability of the connection between the sampler and the pipeline. Therefore, we propose a gas extraction negative pressure sampler. Utility Model Content

[0005] The purpose of this invention is to provide a negative pressure sampler for gas extraction to solve the problems mentioned in the background art.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] Specifically, this application describes a gas extraction negative pressure sampler, comprising: a sampling tube, a support cylinder, and limiting cylinders fixedly connected to both sides of the support cylinder. The support cylinder is fixedly connected to the bottom end of the sampling tube, and a connector is fixedly connected to the input end of the sampling tube. A connecting tube is threadedly connected to the outer wall of the connector.

[0008] The inner cavity of the support cylinder is slidably provided with arc-shaped clamps on both sides. Multiple sets of limiting strips are fixedly connected to the side walls of the arc-shaped clamps. Anti-slip textures are provided on the outer side of the limiting strips. An adjusting component for driving the arc-shaped clamps to move horizontally is provided inside the limiting cylinder.

[0009] As a preferred technical solution of this application, the adjusting member includes a movable rod, which is slidably connected to the inner cavity of the limiting cylinder. One end of the movable rod passes through the side wall of the support cylinder and is fixedly connected to the arc-shaped clamping plate. The support cylinder is provided with an elastic element for applying a thrust to the arc-shaped clamping plate.

[0010] As a preferred technical solution of this application, the elastic element includes a fixed ring and a spring. The fixed ring is fixedly connected to one side wall of the movable rod, and the spring is fixedly connected between the side wall of the fixed ring and the inner side wall of the limiting cylinder.

[0011] As a preferred technical solution of this application, the other end of the movable rod is rotatably connected to a rotating block, and the cross-section of the rotating block is rectangular.

[0012] As a preferred technical solution of this application, a pull rod is slidably connected to the top of the sampling tube.

[0013] As a preferred technical solution of this application, a sealing ring is fixedly connected to the upper end of the inner side wall of the support cylinder, and a connecting groove is opened at the bottom end of the sealing ring to contact the connecting pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In the scheme of this application:

[0016] 1. By setting a support cylinder at one end of the sampling tube and setting arc-shaped clamps on both sides of the inner cavity of the support cylinder, and installing a limiting strip on the arc-shaped clamp, and setting anti-slip texture on the limiting strip, the arc-shaped clamp and the limiting strip are moved horizontally by the adjusting component. The arc-shaped clamp and the limiting strip are used to clamp the connecting tube that is threaded to the connector. The arc-shaped clamp provides a compensating force to the connecting tube, which reduces the possibility of the connecting tube loosening when the sampler is subjected to vibration or rotational force, and improves the stability and reliability of the connection between the sampler and the pipeline.

[0017] 2. By fixing limiting cylinders on both sides of the support cylinder, the movable rod is supported by the limiting cylinders. The movable rod drives the arc-shaped clamp to move horizontally, and the rotation of the rotating block drives the movable rod to move horizontally, so that the movable rod can drive the arc-shaped clamp to loosen the connecting pipe, thereby facilitating the disassembly and assembly of the connecting pipe and making it convenient to use. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0019] In the attached diagram:

[0020] Figure 1A perspective view of a gas extraction negative pressure sampler provided in this application;

[0021] Figure 2 A bottom view of the sampling tube of a gas extraction negative pressure sampler provided in this application;

[0022] Figure 3 A split view of the support cylinder of a gas extraction negative pressure sampler provided in this application;

[0023] Figure 4 A diagram showing the detached cylinder of a negative pressure gas extraction sampler provided in this application.

[0024] In the diagram: 10. Sampling tube; 11. Pull rod; 12. Connector; 13. Connecting tube; 20. Support cylinder; 21. Sealing ring; 22. Arc-shaped clamp; 23. Limiting strip; 30. Limiting cylinder; 31. Movable rod; 32. Fixing ring; 33. Spring; 34. Rotating block. Detailed Implementation

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-4A gas extraction negative pressure sampler includes: a sampling tube 10, a support cylinder 20, and a limiting cylinder 30 fixedly connected to both sides of the support cylinder 20. The support cylinder 20 is used to support an arc-shaped clamping plate 22 and is fixedly connected to the bottom end of the sampling tube 10. A connector 12 is fixedly connected to the input end of the sampling tube 10, and a connecting tube 13 is threadedly connected to the outer side wall of the connector 12. The arc-shaped clamping plate 22 is slidably arranged on both sides of the inner cavity of the support cylinder 20. The limiting cylinder 30 drives the arc-shaped clamping plate 22 to move through an adjusting component. Multiple sets of limiting strips 23 are fixedly connected to the side wall of the arc-shaped clamping plate 22. Anti-slip textures are opened on the outer side of the limiting strips 23. The arc-shaped clamping plate 22 clamps and limits the connecting tube 13 through the limiting strips 23, thereby improving the pre-tightening force of the connecting tube 13. Specifically, connecting textures can be opened on the connecting tube 13 to improve the clamping effect of the arc-shaped clamping plate 22. An adjusting component for driving the arc-shaped clamping plate 22 to move is provided inside the limiting cylinder 30.

[0028] Please see Figure 1-4 The adjusting component includes a movable rod 31, which is slidably connected to the inner cavity of the limiting cylinder 30. One end of the movable rod 31 passes through the side wall of the support cylinder 20 and is fixedly connected to the arc-shaped clamp 22. The support cylinder 20 is provided with an elastic element for applying a pushing force to the arc-shaped clamp 22. The movable rod 31 drives the arc-shaped clamp 22 to move horizontally.

[0029] Please see Figure 4 The elastic element includes a fixed ring 32 and a spring 33. The fixed ring 32 is fixedly connected to one side wall of the movable rod 31, and the spring 33 is fixedly connected between the side wall of the fixed ring 32 and the inner side wall of the limiting cylinder 30. The spring 33 applies a thrust to the fixed ring 32.

[0030] Please see Figure 1-4 The other end of the movable rod 31 is rotatably connected to a rotating block 34, which has a rectangular cross-section. The rotation of the rotating block 34 can pull the movable rod 31 to move horizontally.

[0031] Please see Figure 1 A pull rod 11 is slidably connected to the top of the sampling tube 10. The gas collection of the sampling tube 10 is realized through the pull rod 11. Specifically, the model of the sampling tube 10 can be FW-2 or FW-3.

[0032] Please see Figure 3 A sealing ring 21 is fixedly connected to the upper end of the inner side wall of the support cylinder 20. The bottom end of the sealing ring 21 is provided with a connecting groove that contacts the connecting pipe 13. The sealing ring 21 and the connecting groove are provided to improve the sealing performance of the connection between the connecting pipe 13 and the joint 12.

[0033] Specifically, when using this device, firstly, rotate the rotating block 34. The rotating block 34 drives the movable rod 31 to move, and makes the two sets of arc-shaped clamps 22 move away from each other. At this time, the connecting pipe 13 is threadedly connected to the joint 12, and the connecting pipe 13 moves into the connecting groove on the sealing ring 21. Then, rotate the rotating block 34 again. The rotating block 34 drives the movable rod 31 to move, and applies a pushing force to the movable rod 31 through the fixed ring 32 and the spring 33. The movable rod 31 drives the arc-shaped clamps 22 and the limiting strips 23 to move. The two sets of arc-shaped clamps 22 and the two sets of limiting strips 23 clamp the connecting pipe 13, thereby ensuring the connection stability between the joint 12 and the connecting pipe 13. Finally, by pulling the pull rod 11, the sampling tube 10 realizes the gas extraction operation through the joint 12 and the connecting pipe 13, thus completing the use.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A negative pressure sampler for gas extraction, comprising: The sampling tube (10), the support cylinder (20) and the limiting cylinder (30) fixedly connected to both sides of the support cylinder (20) are characterized in that the support cylinder (20) is fixedly connected to the bottom end of the sampling tube (10), the input end of the sampling tube (10) is fixedly connected to a connector (12), and the outer side wall of the connector (12) is threadedly connected to a connecting pipe (13). The inner cavity of the support cylinder (20) is slidably provided with arc-shaped clamps (22) on both sides. Multiple sets of limiting strips (23) are fixedly connected to the side walls of the arc-shaped clamps (22). Anti-slip textures are provided on the outer side of the limiting strips (23). An adjusting component for driving the arc-shaped clamps (22) to move is provided inside the limiting cylinder (30).

2. The gas extraction negative pressure sampler according to claim 1, characterized in that: The adjusting component includes a movable rod (31), which is slidably connected to the inner cavity of the limiting cylinder (30). One end of the movable rod (31) passes through the side wall of the support cylinder (20) and is fixedly connected to the arc-shaped clamp (22). The support cylinder (20) is provided with an elastic element for applying a thrust to the arc-shaped clamp (22).

3. The gas extraction negative pressure sampler according to claim 2, characterized in that: The elastic element includes a fixed ring (32) and a spring (33). The fixed ring (32) is fixedly connected to one side wall of the movable rod (31), and the spring (33) is fixedly connected between the side wall of the fixed ring (32) and the inner side wall of the limiting cylinder (30).

4. A gas extraction negative pressure sampler according to claim 2, characterized in that: The other end of the movable rod (31) is rotatably connected to a rotating block (34), the rotating block (34) having a rectangular cross-section.

5. A negative pressure sampler for gas extraction according to claim 1, characterized in that: A pull rod (11) is slidably connected to the top of the sampling tube (10).

6. A gas extraction negative pressure sampler according to claim 1, characterized in that: A sealing ring (21) is fixedly connected to the upper end of the inner wall of the support cylinder (20), and a connecting groove is provided at the bottom end of the sealing ring (21) to contact the connecting pipe (13).

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