Gas sampling tube

Abstract

The utility model relates to the technical field of gas sampling, and discloses a gas sampling pipe which comprises a sampling pipe and a collecting tank, a dismounting mechanism is arranged at a gas inlet of the sampling pipe, and a collecting mechanism is arranged between the sampling pipe and the collecting tank; the dismounting and mounting mechanism comprises a fixing sleeve and a connecting sleeve, a filter screen is fixedly arranged on the inner wall of the connecting sleeve, a movable cavity is formed in the fixing sleeve, and an extrusion block is slidably connected to the inner wall of the movable cavity. Through the arrangement of the collecting mechanism, after single gas sampling, a rotating ring is rotated to enable a baffle to block a gas inlet in a fixed plate, then a collecting tank is rotated to enable a threaded sleeve and a threaded ring to be disconnected, the collecting tank is taken down, and then a sealing threaded cover matched with the threaded sleeve is used for sealing the collecting tank; and then a new collecting tank is reassembled on the sampling pipe, so that next gas sampling work can be carried out, the working efficiency of gas sampling is effectively improved, and the cost expenditure of gas sampling work is reduced.

Description

Technical Field

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

[0002] Gas sampling is the process of collecting samples of pollutants or contaminated air in the atmosphere. The samples collected should be representative. Gas samplers are conventional instruments used to collect gas samples in the atmospheric environment or working environment.

[0003] A Chinese patent provides a volatile organic gas diffusion sampling tube, with the publication number CN216484176U, comprising a main body, the main body also comprising a first short pipe and a second short pipe, the left and right ends of the main body are symmetrically provided with connecting sleeves, the first short pipe and the second short pipe are both installed with pipe caps through the connecting sleeves, an inner pipe joint is fixedly provided at one end of the first short pipe close to the middle of the main body, an outer pipe joint is fixedly provided at one end of the second short pipe close to the middle of the main body, sampling adsorption chambers are fixedly provided inside the first short pipe and the second short pipe, an adsorption column is clamped inside the sampling adsorption chamber, and a sealing ring is also provided at the connecting wall between the connecting sleeve and the pipe cap.

[0004] The above device facilitates the disassembly and cleaning of the sampling tube after a single gas sampling. However, in order to ensure the accuracy of the data, the sampling personnel need to sample gases from multiple environments, and the sampled gases need to be stored separately. This requires preparing multiple sampling tubes for sampling, which not only reduces the efficiency of the gas sampling work, but also increases the cost of gas sampling. Therefore, it is necessary to provide a gas sampling tube. Utility Model Content

[0005] The purpose of the utility model is to provide a gas sampling tube to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas sampling tube, comprising a sampling tube and a collecting tank, a disassembly and assembly mechanism is arranged at the air inlet of the sampling tube, and a collecting mechanism is arranged between the sampling tube and the collecting tank; the disassembly and assembly mechanism comprises a fixing sleeve and a connecting sleeve, a filter screen is fixedly arranged on the inner wall of the connecting sleeve, a movable cavity is provided in the fixing sleeve, an extrusion block is slidably connected to the inner wall of the movable cavity, a spring is fixedly arranged on the bottom end face of the extrusion block, a clamping rod is fixedly arranged on the top end face of the extrusion block, and a clamping hole adapted for the clamping rod is provided on the connecting sleeve; the collecting mechanism comprises a connecting tube and a connecting tube, a threaded ring is fixedly arranged on the bottom end face of the connecting tube, a threaded sleeve is fixedly arranged on the connecting tube, a fixing plate is fixedly arranged on the inner wall of the connecting tube, an air inlet is provided on the fixing plate, a mounting tube is fixedly arranged on the collecting tank, a rotating ring is rotatably connected between the mounting tube and the connecting tube, and a baffle is fixedly arranged on the inner wall of the rotating ring.

[0007] Preferably, the fixing sleeve is fixedly arranged at the air inlet end of the sampling tube, a groove is opened at one end of the connecting sleeve, a sealing sleeve is fixedly arranged on the inner wall of the groove, and the fixing sleeve is slidingly connected with the sealing sleeve and the inner wall of the groove respectively.

[0008] Preferably, the bottom end surface of the spring is fixedly connected to the inner wall of the movable cavity, the clamping rod slides through the inner wall of the movable cavity and is clamped with the clamping hole, the upper end of the clamping rod is arranged with an inclined surface, and the inclined surface of the clamping rod is extrusion-slidably connected to the inner wall of the groove.

[0009] Preferably, the connecting tube is made of a transparent material, the inner wall of the threaded sleeve is threadedly connected to the threaded ring, limiting rings are fixedly provided at both upper and lower ends of the rotating ring, the bottom end surface of the connecting tube and the top end surface of the mounting tube are provided with limiting grooves adapted to the limiting rings, and the limiting ring is slidably connected to the inner wall of the limiting groove.

[0010] Preferably, the surface of the rotating ring is provided with an anti-slip sleeve, the anti-slip sleeve is made of rubber material, and the baffle is arranged in an incomplete semicircular shape.

[0011] Preferably, the inner wall of the sampling tube is sealingly and slidably connected with a piston, one end of the piston is fixedly provided with a pull rod, one end of the pull rod slides through the inner wall of the sampling tube and extends to the outer end of the sampling tube, and one end of the pull rod is fixedly provided with a handle.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1) The gas sampling tube, through the setting of the collection mechanism, makes it possible that after a single gas sampling, the rotating ring is rotated to make the baffle block the air inlet on the fixed plate, and then the collection tank is rotated to release the connection between the threaded sleeve and the threaded ring, and the collection tank is removed, and then the collection tank is sealed with a sealing threaded cover adapted to the threaded sleeve, and then the new collection tank is reassembled on the sampling tube, and the next gas sampling work can be carried out, which effectively improves the working efficiency of gas sampling and reduces the cost expenditure of gas sampling work.

[0014] 2) The gas sampling tube can block impurities such as particles in the gas during gas sampling through the filter to ensure the purity of the sampled gas. When the filter needs to be replaced, the card rod is pressed to retract the card rod into the movable cavity, and the connecting sleeve is pulled out to complete the removal of the filter. After the filter is replaced, the connecting sleeve is plugged into the fixed sleeve, and the connecting sleeve will squeeze the card rod to retract the card rod into the movable cavity. The card rod pops out under the rebound action of the spring, and extends out of the movable cavity to engage with the card hole on the connecting sleeve to complete the installation of the filter. The operation is simple and convenient, which improves the practicality of the sampling tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 This is a three-dimensional structural cross-sectional view of the sampling tube of the utility model;

[0017] Figure 3 For this utility model Figure 2 A magnified view of the structure at center A;

[0018] Figure 4 This is a three-dimensional structural cross-sectional view of the collection tank of the utility model;

[0019] Figure 5 For this utility model Figure 4 A magnified view of the structure at point B.

[0020] In the figure: 1. sampling tube; 2. pull rod; 3. piston; 4. pull handle; 5. collecting tank; 6. disassembly and assembly mechanism; 601. fixing sleeve; 602. connecting sleeve; 603. filter screen; 604. sealing sleeve; 605. extrusion block; 606. spring; 607. clamping rod; 7. collecting mechanism; 701. connecting pipe; 702. connecting pipe; 703. threaded ring; 704. threaded sleeve; 705. fixing plate; 706. rotating ring; 707. anti-slip sleeve; 708. baffle; 709. limiting ring; 710. mounting pipe; 711. limiting groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0022] Combination Figure 1-Figure 5 A gas sampling tube comprises a sampling tube 1 and a collecting tank 5. A piston 3 is sealingly and slidably connected to the inner wall of the sampling tube 1. A pull rod 2 is fixedly provided at one end of the piston 3. One end of the pull rod 2 slides through the inner wall of the sampling tube 1 and extends to the outer end of the sampling tube 1. A handle 4 is fixedly provided at one end of the pull rod 2. A disassembly mechanism 6 is provided at the air inlet of the sampling tube 1. A collecting mechanism 7 is provided between the sampling tube 1 and the collecting tank 5.

[0023] See also Figure 2 and Figure 3, it is further obtained that the disassembly and assembly mechanism 6 includes a fixed sleeve 601 and a connecting sleeve 602, a filter screen 603 is fixedly arranged on the inner wall of the connecting sleeve 602, an active cavity is provided in the fixed sleeve 601, an extrusion block 605 is slidably connected to the inner wall of the active cavity, a spring 606 is fixedly arranged on the bottom end surface of the extrusion block 605, a clamping rod 607 is fixedly arranged on the top surface of the extrusion block 605, and a clamping hole adapted for the clamping rod 607 is provided on the connecting sleeve 602; the fixed sleeve 601 is fixedly arranged at the air inlet end of the sampling tube 1, a groove is provided at one end of the connecting sleeve 602, a sealing sleeve 604 is fixedly arranged on the inner wall of the groove, the fixed sleeve 601 is slidably connected to the sealing sleeve 604 and the inner wall of the groove respectively, the bottom end surface of the spring 606 is fixedly connected to the inner wall of the active cavity, the clamping rod 607 slides through the inner wall of the active cavity and is clamped with the clamping hole, the upper end of the clamping rod 607 is arranged with an inclined surface, and the inclined surface of the clamping rod 607 is extrusion-type slidingly connected to the inner wall of the groove.

[0024] Specifically, the filter 603 can be used to block impurities such as particles in the gas during gas sampling to ensure the purity of the sampled gas. When the filter 603 needs to be replaced, the clamping rod 607 is pressed to retract the clamping rod 607 into the movable cavity, and the connecting sleeve 602 is pulled out to complete the disassembly of the filter 603. After the filter 603 is replaced, the connecting sleeve 602 is plugged into the fixed sleeve 601, and the connecting sleeve 602 will squeeze the clamping rod 607 to retract the clamping rod 607 into the movable cavity. The clamping rod 607 pops up under the rebound action of the spring 606, and extends out of the movable cavity to engage with the clamping hole on the connecting sleeve 602, thereby completing the installation of the filter 603. The operation is simple and convenient, which improves the practicality of the sampling tube.

[0025] See also Figure 2 , Figure 4 and Figure 5 , it is further obtained that the collecting mechanism 7 includes a connecting pipe 701 and a connecting pipe 702, a threaded ring 703 is fixedly provided on the bottom end surface of the connecting pipe 701, a threaded sleeve 704 is fixedly provided on the connecting pipe 702, a fixing plate 705 is fixedly provided on the inner wall of the connecting pipe 702, an air inlet is opened on the fixing plate 705, a mounting pipe 710 is fixedly provided on the collecting tank 5, a rotating ring 706 is rotatably connected between the mounting pipe 710 and the connecting pipe 702, and a baffle 708 is fixedly provided on the inner wall of the rotating ring 706; The through pipe 701 is made of a transparent material, the inner wall of the threaded sleeve 704 is threadedly connected to the threaded ring 703, and limiting rings 709 are fixedly provided at the upper and lower ends of the rotating ring 706. The bottom end surface of the connecting pipe 702 and the top end surface of the mounting pipe 710 are provided with limiting grooves 711 adapted to the limiting rings 709, and the limiting ring 709 is slidably connected to the inner wall of the limiting groove 711. The surface of the rotating ring 706 is provided with an anti-slip sleeve 707, and the anti-slip sleeve 707 is made of rubber material. The baffle 708 is set in an incomplete semicircular shape.

[0026] Specifically, through the setting of the collecting mechanism 7, after a single gas sampling, the rotating ring 706 is rotated to make the baffle 708 seal the air inlet on the fixed plate 705, and then the collecting tank 5 is rotated to release the connection between the threaded sleeve 704 and the threaded ring 703, and the collecting tank 5 is removed, and then the collecting tank 5 is sealed with a sealing threaded cover adapted to the threaded sleeve 704, and then the new collecting tank 5 is reassembled on the sampling tube 1, and the next gas sampling work can be carried out, which effectively improves the working efficiency of gas sampling and reduces the cost expenditure of gas sampling work.

[0027] In actual operation, the pull handle 4 is pulled so that the pull rod 2 drives the piston 3 to move in the sampling tube 1, so that a negative pressure is formed in the sampling tube 1, so that the gas in the sampling environment can be drawn into the sampling tube 1, and enter the collection tank 5 through the connecting tube 701 for storage. Before entering the sampling tube 1, the gas will be filtered by the filter 603, and the filter 603 can block impurities such as particles in the gas to ensure the purity of the sampled gas. After the gas sampling is completed, the rotating ring 706 is rotated to rotate the baffle 708, so that The air inlet on the fixed plate 705 is blocked. The connecting pipe 701 is made of transparent material, which is convenient for observing whether the air inlet is blocked. Then, the collecting tank 5 is rotated to release the connection between the threaded sleeve 704 and the threaded ring 703. The collecting tank 5 is removed, and the collecting tank 5 is sealed with a sealing threaded cover adapted to the threaded sleeve 704. A single gas sampling can be completed. Then, the new collecting tank 5 is reassembled on the sampling tube 1, and the next gas sampling work can be carried out, which effectively improves the working efficiency of gas sampling and reduces the cost expenditure of gas sampling work.

[0028] When the filter 603 needs to be replaced, the card rod 607 is pressed to retract the card rod 607 into the active cavity, and then the connecting sleeve 602 is pulled out from the fixed sleeve 601 to complete the removal of the filter 603. After the filter 603 is replaced, the sealing sleeve 604 on the connecting sleeve 602 is aligned with the sealing groove of the fixed sleeve 601 for plugging. The setting of the sealing sleeve 604 can ensure the sealing between the connecting sleeve 602 and the fixed sleeve 601. When the connecting sleeve 602 and the fixed sleeve 601 are plugged, the connecting sleeve 602 will squeeze the card rod 607 to retract the card rod 607 into the active cavity. When the connecting sleeve 602 and the fixed sleeve 601 are connected, the card rod 607 pops out under the rebound action of the spring 606, and extends out of the active cavity to engage with the card hole on the connecting sleeve 602 to complete the installation of the filter 603.

[0029] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas sampling tube, comprising a sampling tube (1) and a collecting tank (5), characterized in that: A disassembly mechanism (6) is provided at the air inlet of the sampling tube (1), and a collection mechanism (7) is provided between the sampling tube (1) and the collection tank (5); The disassembly and assembly mechanism (6) comprises a fixed sleeve (601) and a connecting sleeve (602); a filter screen (603) is fixedly arranged on the inner wall of the connecting sleeve (602); a movable cavity is provided in the fixed sleeve (601); an extrusion block (605) is slidably connected to the inner wall of the movable cavity; a spring (606) is fixedly arranged on the bottom end surface of the extrusion block (605); a clamping rod (607) is fixedly arranged on the top end surface of the extrusion block (605); and a clamping hole adapted to the clamping rod (607) is provided on the connecting sleeve (602); The collecting mechanism (7) comprises a connecting pipe (701) and a connecting pipe (702); a threaded ring (703) is fixedly provided on the bottom end surface of the connecting pipe (701); a threaded sleeve (704) is fixedly provided on the connecting pipe (702); a fixing plate (705) is fixedly provided on the inner wall of the connecting pipe (702); an air inlet is provided on the fixing plate (705); a mounting pipe (710) is fixedly provided on the collecting tank (5); a rotating ring (706) is rotatably connected between the mounting pipe (710) and the connecting pipe (702); a baffle (708) is fixedly provided on the inner wall of the rotating ring (706).

2. A gas sampling tube according to claim 1, characterized in that: The fixing sleeve (601) is fixedly arranged at the air inlet end of the sampling tube (1); a groove is provided at one end of the connecting sleeve (602); a sealing sleeve (604) is fixedly arranged on the inner wall of the groove; and the fixing sleeve (601) is slidably connected to the sealing sleeve (604) and the inner wall of the groove, respectively.

3. A gas sampling tube according to claim 1, characterized in that: The bottom end surface of the spring (606) is fixedly connected to the inner wall of the active cavity, the clamping rod (607) slides through the inner wall of the active cavity and is clamped with the clamping hole, the upper end of the clamping rod (607) is arranged in an inclined surface, and the inclined surface of the clamping rod (607) is extrusion-slidingly connected to the inner wall of the groove.

4. A gas sampling tube according to claim 1, characterized in that: The connecting tube (701) is made of a transparent material, the inner wall of the threaded sleeve (704) is threadedly connected to the threaded ring (703), the upper and lower ends of the rotating ring (706) are fixedly provided with limit rings (709), the bottom end surface of the connecting tube (702) and the top end surface of the mounting tube (710) are both provided with limit grooves (711) adapted to the limit rings (709), and the limit rings (709) are slidably connected to the inner wall of the limit grooves (711).

5. A gas sampling tube according to claim 1, characterized in that: The surface of the rotating ring (706) is provided with an anti-slip sleeve (707), the anti-slip sleeve (707) is made of a rubber material, and the baffle (708) is arranged in an incomplete semicircular shape.

6. A gas sampling tube according to claim 1, characterized in that: The inner wall of the sampling tube (1) is sealingly and slidably connected to a piston (3), one end of the piston (3) is fixedly provided with a pull-out rod (2), one end of the pull-out rod (2) slides through the inner wall of the sampling tube (1) and extends to the outer end of the sampling tube (1), and one end of the pull-out rod (2) is fixedly provided with a pull handle (4).

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