Gas sampling tube automatic back suction anti-leakage structure

Abstract

The utility model relates to environmental monitoring technical field discloses gas sampling pipe automatic back suction leakproof structure, including the pipe body, the outside rear side of connecting ring is the inside fixed connection of pipe body has the butt joint ring, the outside rear side fixed connection of connecting ring has a plurality of guide posts, a plurality of the outside rear side fixed connection of guide post has the connecting block, the outside of a plurality of connecting blocks is the outside rear side fixed connection of butt joint ring has the movable ring, the outside front side of movable ring is the outside rear side fixed connection of being close to butt joint ring has a plurality of clamping post, the outside adjacent side of movable ring and butt joint ring all is fixedly connected with the sealing ring, in the utility model, the automatic opening and closing of movable ring are realized through the guidance of guide post and spring, ensure that gas is extracted into high efficiency while preventing leakage effectively, its design not only reduces the operation complexity, also provides reliable stable gas sampling performance.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring technology, and in particular to an automatic back-suction and leak-proof structure for gas sampling tubes. Background Technology

[0002] The automatic back-suction and leak-proof structure of the gas sampling tube is a device used for gas sampling. It ensures the effective collection of gas and prevents leakage during the sampling process. Its design aims to realize the functions of automatic gas back-suction and leak prevention, ensuring the accuracy and safety of gas sampling. It is widely used in environmental monitoring, industrial gas analysis and other fields.

[0003] Typically, an automatic back-suction leak-proof structure for gas sampling tubes consists of a tube body, a vacuum pump, and a hinged plate. Therefore, during use, the tube body serves as the main container for gas collection. The tube body draws in the gas to be sampled through a negative pressure environment, ensuring that the gas can flow smoothly into the interior. The vacuum pump provides continuous negative pressure, drawing the gas from the external environment into the tube body through the suction action, while maintaining the negative pressure state inside the tube. The hinged plate automatically opens under the action of negative pressure, allowing the gas to flow into the tube body.

[0004] However, some existing devices fail to effectively solve the problem of preventing leakage in the pipe body after extraction. These devices typically use simple mechanical seals, which are prone to gas leakage after extraction due to changes in internal gas pressure or other external factors. Therefore, an automatic back-suction leak-proof structure for gas sampling pipes is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides an automatic back-suction and leak-proof structure for gas sampling tubes, aiming to improve the problem that some existing devices cannot prevent leakage of the tube body after extraction is completed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An automatic back-suction leak-proof structure for a gas sampling tube includes a tube body. An extraction component for negative pressure suction is fixedly connected to the rear outer side of the tube body. A connecting ring is fixedly connected to the front outer side of the tube body. A docking ring is fixedly connected to the rear outer side of the connecting ring (i.e., inside the tube body). Multiple guide posts are fixedly connected to the rear outer side of the connecting ring. Springs are fitted around the outer sides of each guide post. Connecting blocks are fixedly connected to the rear outer sides of the guide posts. A movable ring is fixedly connected to the rear outer side of the docking ring (i.e., outside the connecting blocks). Multiple locking posts are fixedly connected to the front outer side of the movable ring (i.e., the rear outer side near the docking ring). Sealing rings are fixedly connected to adjacent outer sides of both the movable ring and the docking ring. As a further description of the above technical solution: The extraction assembly includes a vacuum pump, which is externally fixedly connected to the rear side of the tube body. Two support columns are fixedly connected to the rear side of the tube body, and a rotating column is fixedly connected to an adjacent side of the two support columns. An opening and closing plate is rotatably connected to the outside of the rotating column. As a further description of the above technical solution: The air inside the pipe is extracted by the air pump, causing the opening and closing plate to open to one side of the air pump. As a further description of the above technical solution: Two fixing rings are fixedly connected to the outside of the tube body. Multiple guide rods are fixedly connected to the adjacent side of the two fixing rings. Sliding blocks are slidably connected to the outside of the multiple guide rods. Limiting blocks are fixedly connected to the rear side of the multiple guide rods. As a further description of the above technical solution: All of the guide rods are made of a flexible material, allowing them to be bent. As a further description of the above technical solution: The outer rear side of the plurality of engagement pins is slidably connected to the outer side of the docking ring, and the extraction assembly enables the movable ring to be stretched toward the inside of the tube body, i.e., toward the side of the vacuum pump. As a further description of the above technical solution: The interior of the plurality of sliding blocks is slidably connected to the exterior of the guide rod, thereby keeping the pipe body unobstructed.

[0007] This utility model has the following beneficial effects: 1. In this utility model, the automatic opening and closing of the movable ring is achieved by the guidance of the guide column and the spring, which ensures efficient gas extraction while effectively preventing leakage. The design of the sealing ring and the locking column ensures the airtightness of the tube during the process, improves the sampling accuracy and efficiency, and its design not only reduces the complexity of operation, but also provides reliable and stable gas sampling performance.

[0008] 2. In this utility model, the sliding block slides outside the guide rod, allowing the gas flow path to be flexibly adjusted when the tube body bends, ensuring continuous and unobstructed internal airflow, without affecting the gas extraction efficiency and sampling accuracy, and preventing efficiency reduction when bending. Its design can effectively ensure stable operation when extracting gas. Attached Figure Description

[0009] Figure 1 This is a three-dimensional schematic diagram of the automatic back-suction and leak-proof structure of the gas sampling tube proposed in this utility model. Figure 2 This is a schematic diagram of the rotating column in the automatic back-suction and leak-proof structure of the gas sampling tube proposed in this utility model. Figure 3 A schematic diagram of the spring in the automatic back-suction and leak-proof structure of the gas sampling tube proposed in this utility model; Figure 4 This is a schematic diagram of the sealing ring of the automatic back-suction and leak-proof structure of the gas sampling tube proposed in this utility model.

[0010] Legend: 1. Pipe body; 2. Vacuum pump; 3. Support column; 4. Rotating column; 5. Opening and closing plate; 6. Connecting ring; 7. Connecting ring; 8. Sealing ring; 9. Guide column; 10. Spring; 11. Connecting block; 12. Moving ring; 13. Locking column; 14. Fixing ring; 15. Guide rod; 16. Sliding block; 17. Limiting block. Detailed Implementation

[0011] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Reference Figure 3 and Figure 4 This utility model provides an embodiment of an automatic back-suction leak-proof structure for a gas sampling tube, comprising a tube body 1. An extraction assembly for negative pressure suction is fixedly connected to the outer rear side of the tube body 1. The extraction assembly includes a vacuum pump 2, which provides a negative pressure source to drive the entire back-suction process, creating an internal negative pressure in the tube body 1. The vacuum pump 2 is externally and fixedly connected to the outer rear side of the tube body 1. Two support pillars 3 are fixedly connected to the outer rear side of the tube body 1, providing good support capacity. A rotating column 4 is fixedly connected to an adjacent side of the two support pillars 3. Supported by the two support pillars 3, the rotating column 4 is designed to provide good rotational capability. An opening and closing plate 5 is rotatably connected to the outside of the rotating column 4. The opening and closing plate 5 allows gas to flow smoothly as the rotating column 4 rotates towards the position close to the vacuum pump 2. The vacuum pump 2 extracts air from the inside of the tube body 1, causing the opening and closing plate 5 to open to one side of the vacuum pump 2. A connecting ring 6 is fixedly connected to the front outside of the tube body 1. Its design provides good connection capability. A docking ring 7 is fixedly connected to the rear outside of the connecting ring 6, i.e., inside the tube body 1. The docking ring 7 is designed to have good docking capability. Multiple guide posts 9 are fixedly connected to the rear outside of the connecting ring 6. The guide posts 9 are designed to have good guiding capability. Multiple guide posts 9 are each fitted with a spring 10, which can be reset after being stretched due to its own characteristics. A connecting block 11 is fixedly connected to the rear side of the multiple guide posts 9, which is designed to have good support capacity. A movable ring 12 is fixedly connected to the rear side of the multiple connecting blocks 11, which is the rear side of the docking ring 7. The spring 10 can drive the movable ring 12 to be pulled and reset. Multiple locking posts 13 are fixedly connected to the front side of the movable ring 12, which is close to the rear side of the docking ring 7, which is designed to provide good alignment capability. Sealing rings 8 are fixedly connected to the adjacent sides of the movable ring 12 and the docking ring 7, which is designed to have good sealing performance. The external sliding connection of the multiple locking posts 13 is on the rear side of the docking ring 7. The movable ring 12 can be stretched towards the inside of the tube body 1, which is close to the side of the vacuum pump 2, by the extraction component.

[0013] Reference Figure 1 and Figure 2 The pipe body 1 is externally fixedly connected to two fixing rings 14, which are designed to provide good support. Multiple guide rods 15 are fixedly connected to the adjacent side of the two fixing rings 14, which are designed to provide good sliding space. The multiple guide rods 15 are made of soft material, which allows them to be bent. Sliding blocks 16 are slidably connected to the outside of the multiple guide rods 15. When the pipe body 1 bends, sliding the sliding blocks 16 on the outside of the guide rods 15 can prevent the pipe body 1 from bending and maintain flow. Limiting blocks 17 are fixedly connected to the rear side of the multiple guide rods 15. The design can prevent the sliding blocks 16 from detaching from the outside of the guide rods 15. The inside of the multiple sliding blocks 16 can be slidably connected to the outside of the guide rods 15, so that the pipe body 1 remains unobstructed.

[0014] Working Principle: When gas sampling is required, the vacuum pump 2, fixed to the rear side of the tube body 1, is first activated. The vacuum pump 2 generates a negative pressure source. Due to the pressure difference between the inside and outside of the tube body 1, under the action of negative pressure, the opening and closing plate 5 rotates towards the side closer to the vacuum pump 2, supported by the rotating column 4 and the support column 3, thus opening the gas flow channel. At this time, gas can flow smoothly from the front end to the rear end of the tube body 1 and be extracted by the vacuum pump 2. As the vacuum pump 2 continuously extracts air from the tube body 1, the internal pressure gradually decreases, forming a continuous negative pressure. This negative pressure is transmitted to the movable ring 12 through the connecting ring 6 and the docking ring 7. Guided by the guide column 9 and the spring 10, the movable ring 12 is pulled towards the inside of the tube body 1 towards the side closer to the vacuum pump 2, creating an opening for gas extraction. As the movable ring 12 is pulled backward, the multiple locking columns 13 fixed externally move away from their corresponding slots in the docking ring 7 under the guiding action. Meanwhile, the sealing ring 8 provides good sealing performance to prevent gas leakage. After the pumping process is completed, the pump 2 stops working, and the pressure inside the pipe 1 gradually returns to equilibrium. At this time, the movable ring 12 moves forward slowly under the action of the spring 10, driving the opening and closing plate 5 to reset and close, preventing external gas from flowing back into the pipe 1. When the tube body 1 is in use, the limiting block 17 is installed at the rear end of the guide rod 15 to prevent the sliding block 16 from falling off. When it is necessary to change the gas flow path, external force is applied to the tube body 1, causing it to bend. The fixing ring 14 provides support and reduces the risk of direct force. The sliding block 16 slides along the guide rod 15 according to the change in the shape of the tube body 1, adjusting its position to maintain the stability and unobstructed flow path inside. Its design ensures that the airflow inside the tube body 1 remains unobstructed even when bent, due to the adjustment and protection of the sliding block 16, without affecting the working efficiency of the vacuum pump 2 or the accuracy of gas sampling.

[0015] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas sampling tube automatic back-suction leak-proof structure, comprising a tube body (1), characterized in that: A suction assembly for negative pressure suction is fixedly connected to the outer rear side of the tube body (1). A connecting ring (6) is fixedly connected to the outer front side of the tube body (1). A docking ring (7) is fixedly connected to the outer rear side of the connecting ring (6), i.e. the inner side of the tube body (1). A plurality of guide posts (9) are fixedly connected to the outer rear side of the connecting ring (6). Springs (10) are respectively sleeved on the outer side of the plurality of guide posts (9). A connecting block (11) is fixedly connected to the outer rear side of the plurality of guide posts (9). A movable ring (12) is fixedly connected to the outer rear side of the plurality of connecting blocks (11), i.e. the outer rear side of the docking ring (7). A plurality of locking posts (13) are fixedly connected to the outer front side of the movable ring (12), i.e. the outer rear side near the docking ring (7). A sealing ring (8) is fixedly connected to the outer adjacent side of the movable ring (12) and the docking ring (7).

2. The automatic back-suction and leak-proof structure for gas sampling tubes according to claim 1, characterized in that: The extraction assembly includes a vacuum pump (2), which is fixedly connected to the outer rear side of the tube body (1). Two support columns (3) are fixedly connected to the outer rear side of the tube body (1). A rotating column (4) is fixedly connected to the adjacent side of the two support columns (3). An opening and closing plate (5) is rotatably connected to the outer side of the rotating column (4).

3. The automatic back-suction and leak-proof structure for gas sampling tubes according to claim 2, characterized in that: The air inside the tube (1) is extracted by the air extractor (2), so that the opening and closing plate (5) is opened to one side of the air extractor (2).

4. The automatic back-suction and leak-proof structure for gas sampling tubes according to claim 1, characterized in that: The tube body (1) is fixedly connected to two fixing rings (14) on the outside. Multiple guide rods (15) are fixedly connected to the adjacent side of the two fixing rings (14). Sliding blocks (16) are slidably connected to the outside of the multiple guide rods (15). Limiting blocks (17) are fixedly connected to the rear side of the multiple guide rods (15).

5. The automatic back-suction and leak-proof structure for gas sampling tubes according to claim 4, characterized in that: The guide rods (15) are all made of a flexible material, which allows them to be bent.

6. The automatic back-suction and leak-proof structure for gas sampling tubes according to claim 2, characterized in that: The external sliding connection of the plurality of locking posts (13) is to the rear of the docking ring (7), and the extraction assembly enables the movable ring (12) to be stretched toward the interior of the tube (1), i.e., toward the side of the vacuum pump (2).

7. The automatic back-suction and leak-proof structure for gas sampling tubes according to claim 4, characterized in that: The interior of the plurality of sliding blocks (16) is slidably connected to the exterior of the guide rod (15), so that the tube (1) remains unobstructed.

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