A gas sampling bag

Abstract

The utility model discloses a kind of gas sampling bags, comprising: bag body, for filling gas;Inlet and outlet pipe, for filling or discharging gas into bag body, and communicate with bag body;Sliding switch assembly, installed on inlet and outlet pipe, inlet and outlet pipe are opened or closed by sliding mode, including sleeve sliding on the outer wall of inlet and outlet pipe, the airflow passage is equipped in inlet and outlet pipe, sleeve is fixedly equipped with the valve core assembly corresponding with airflow passage, hold the outer wall of inlet and outlet pipe by hand, push sleeve forward by pinching sleeve with finger, so as to be able to drive valve core assembly to move forward to open airflow passage and inflate, so that when inflating, finger will not be located in the front of sleeve to form obstruction, facilitate inflation.

Description

Technical Field

[0001] This utility model relates to the field of sampling bag technology, specifically to a gas sampling bag. Background Technology

[0002] Sampling bags are typically rectangular or square, with volumes ranging from 0.2 liters to 50 liters. They are used to detect pollutant gases by filling the bags with the pollutant gases.

[0003] In the prior art, a pollution source gas sampling bag with publication number "CN 214222732 U" includes a bag body. An inlet / outlet pipe is fixedly connected to one side of the bag body, and a leak-proof mechanism is fixedly connected to one end of the inlet / outlet pipe. A fixing cap is detachably connected to one side of the leak-proof mechanism. The leak-proof mechanism consists of a tube body, a groove, a fixing block, a connecting rod, a pressing block, a fixing plate, a spring, a through hole, and a sealing plug. A fixing block is fixedly connected to the inner wall of the tube body. A groove is formed on one side of the fixing block, and a through hole is provided on one side of the groove, communicating with the groove. A sealing plug is disposed inside the groove, and a connecting rod is fixedly connected to one side of the sealing plug. This pollution source gas sampling bag, by incorporating the leak-proof mechanism and the fixing cap, achieves dual leak-proof and sealing effects, greatly improving the sealing performance and usability of the pollution source gas sampling bag.

[0004] However, in the aforementioned patent, pressing the pressing block moves the sealing plug to open the through hole, allowing gas to be filled into the bag. However, the pressing block is located at the front end of the can, and gas also needs to be filled through this end. Therefore, pressing the pressing block will obstruct the filling process, making it difficult to fill the bag with gas. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model proposes a gas sampling bag.

[0006] To achieve the above-mentioned technical effects, the present invention adopts the following solution: A gas sampling bag, comprising: The bag is used to hold gas; Inlet / outlet pipes are used to fill or release gas into the bag and are connected to the bag body. A sliding switch assembly is installed on the inlet and outlet pipes and opens or closes the inlet and outlet pipes by sliding. It includes a sleeve that is slidably disposed on the outer wall of the inlet and outlet pipes. The inlet and outlet pipes are provided with an airflow channel, and a valve core assembly corresponding to the airflow channel is fixedly disposed inside the sleeve.

[0007] In a preferred embodiment, the valve core assembly includes a valve stem, which is mounted inside a sleeve via a bracket. The bracket is positioned near the front end of the sleeve. The inner end of the valve stem extends into the inlet / outlet pipe and is fixedly fitted with a sealing head corresponding to the airflow channel. A first abutment edge is fixedly provided on the valve stem, and a second abutment edge corresponding to the first abutment edge is fixedly provided on the inner wall of the inlet / outlet pipe. The second abutment edge is located outside the first abutment edge, and the first abutment edge and the second abutment edge are connected by a spring sleeved on the valve stem.

[0008] In a preferred embodiment, the front end of the airflow channel is provided with an outwardly flared sealing opening, and the sealing head is conical and matches the sealing opening and can be embedded in the sealing opening.

[0009] In a preferred embodiment, the sealing head is made of rubber or silicone.

[0010] In a preferred embodiment, the outer wall of the inlet / outlet pipe has multiple sliding grooves parallel to its axial direction, and the multiple sliding grooves are distributed circumferentially around the inlet / outlet pipe. The inner wall of the sleeve has protruding sliding edges that are embedded in the multiple sliding grooves and slide.

[0011] In a preferred embodiment, the outer wall of the inlet / outlet pipe is provided with a surrounding limiting edge, the limiting edge corresponding to the rear end face of the sleeve, the rear end of the sleeve can abut against the limiting edge, and a first sealing gasket is provided on the side of the limiting edge facing the sleeve.

[0012] In a preferred embodiment, the front end of the sleeve is provided with an end cap, which is connected to the sleeve by a flexible connecting strip.

[0013] In a preferred embodiment, the outer wall of the sleeve is provided with several anti-slip ridges.

[0014] Compared with existing technologies, the beneficial effects are: This utility model has a simple structure and is easy to use. By holding the outer wall of the inlet and outlet tubes and pushing the sleeve forward with your fingers, the valve core assembly can be moved forward to open the airflow channel for inflation. Thus, during inflation, the fingers will not be in front of the sleeve and form an obstruction, making inflation easier. Attached Figure Description

[0015] Figure 1 This is a cross-sectional schematic diagram of the present invention.

[0016] Figure 2 yes Figure 1 The structural diagram of part A in the diagram.

[0017] Figure 3 This is a schematic diagram of the front end of the sleeve in this utility model.

[0018] Reference numerals: 10, bag body; 20, inlet / outlet pipe; 30, sliding switch assembly; 301, sleeve; 3011, bracket; 3012, end cap; 302, airflow channel; 3021, sealing port; 303, valve core assembly; 3031, sealing head; 3032, valve stem; 3033, first abutment edge; 3034, second abutment edge; 3035, spring; 304, slide groove; 305, sliding edge; 306, limiting edge. Detailed Implementation

[0019] 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.

[0020] A gas sampling bag includes: a bag body 10, an inlet / outlet tube 20, and a sliding switch assembly 30.

[0021] The bag 10 is used to hold the gas from the pollution source that needs to be detected.

[0022] The inlet / outlet pipe 20 is used to fill or release gas into the bag body 10 and is connected to the bag body 10.

[0023] The sliding switch assembly 30 is installed on the inlet / outlet pipe 20 and opens or closes the inlet / outlet pipe 20 by sliding. It includes a sleeve 301 that is slidably disposed on the outer wall of the inlet / outlet pipe 20. The inlet / outlet pipe 20 is provided with an airflow channel 302. A valve core assembly 303 corresponding to the airflow channel 302 is fixedly disposed in the sleeve 301.

[0024] Hold the outer wall of the inlet / outlet pipe 20 with your hand, and push the sleeve 301 forward by pinching it with your fingers. This will drive the valve core assembly 303 forward, thereby opening the airflow channel 302 for inflation. Thus, during inflation, your fingers will not be in front of the sleeve 301 and will not obstruct the airflow, making inflation easier.

[0025] In a preferred embodiment, the valve core assembly 303 includes a valve stem 3032, which is mounted inside the sleeve 301 via a bracket 3011. The bracket 3011 is a support rod fixed to both sides of the inner wall of the sleeve 301, preventing blockage. The bracket 3011 is positioned near the front end of the sleeve 301. The inner end of the valve stem 3032 extends into the inlet / outlet pipe 20 and is fixedly provided with a sealing head 3031 corresponding to the airflow channel 302. The sealing head 3031 is located in front of the airflow channel 302. A first abutment edge 3033 is fixedly provided on the valve stem 3032, and a first abutment edge 3033 is fixedly provided on the inner wall of the inlet / outlet pipe 20. A second abutment edge 3034 is provided corresponding to the first abutment edge 3033. The second abutment edge 3034 is located outside the first abutment edge 3033. The first abutment edge 3033 and the second abutment edge 3034 are connected by a spring 3035 sleeved on the valve stem 3032. The dimensions of the sealing head 3031, the first abutment edge 3033 and the second abutment edge 3034 should not block the airflow in the inlet / outlet valve and the sleeve 301. Furthermore, the first abutment edge 3033 and the second abutment edge 3034 are provided with several vent holes to increase the flow rate of gas in the sleeve 301 and the inlet / outlet pipe 20.

[0026] When the sleeve 301 is pushed forward, the valve stem 3032 drives the sealing head 3031 to move forward away from the airflow channel 302, thereby opening the airflow channel 302. This allows the pollutant source gas to be filled into the bag body 10 or the gas inside the bag body 10 to be released. At this time, the first abutment edge 3033 moves toward the second abutment edge 3034, compressing the spring 3035. After this is completed, the sleeve 301 is released, and the first abutment edge 3033 moves backward under the action of the spring force of the spring 3035 to reset, thereby driving the sealing head 3031 to press against the front end of the airflow channel 302 to seal it.

[0027] In a preferred embodiment, the front end of the airflow channel 302 is provided with an flared sealing opening 3021 facing outward, and the sealing head 3031 is conical and matches the sealing opening 3021 and can be embedded in the sealing opening 3021 to seal the airflow channel 302.

[0028] In a preferred embodiment, the sealing head 3031 is made of rubber or silicone. The sealing head 3031 is made of a softer material and is deformed under the elastic force of the spring 3035, which can better seal the airflow channel 302.

[0029] In a preferred embodiment, the outer wall of the inlet / outlet pipe 20 has multiple grooves 304 parallel to its axial direction, and the multiple grooves 304 are distributed circumferentially around the inlet / outlet pipe 20. The inner wall of the sleeve 301 has a protruding sliding edge 305 that is embedded in the multiple grooves 304 and slides.

[0030] In a preferred embodiment, the outer wall of the inlet / outlet pipe 20 is provided with a surrounding limiting edge 306, which corresponds to the rear end face of the sleeve 301. The rear end of the sleeve 301 can abut against the limiting edge 306, and a first sealing gasket is provided on the side of the limiting edge 306 facing the sleeve 301. When the elastic force of the spring 3035 presses the sealing head 3031 against the front end of the airflow channel 302 for sealing, the rear end of the sleeve 301 is simultaneously pressed against the first sealing gasket of the limiting edge 306.

[0031] In a preferred embodiment, the front end of the sleeve is provided with an end cap 3012, which is connected to the sleeve by a flexible connecting strip to prevent the end cap 3012 from falling off.

[0032] In a preferred embodiment, the outer wall of the sleeve 301 is provided with several anti-slip ridges to prevent slippage when the sleeve 301 is pushed forward.

[0033] In the description of this utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component 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 utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A gas sampling bag, characterized in that, include: The bag (10) is used to hold gas; The inlet / outlet pipe (20) is used to fill or release gas into the bag body (10) and is connected to the bag body (10); A sliding switch assembly (30) is installed on the inlet / outlet pipe (20) and opens or closes the inlet / outlet pipe (20) by sliding. It includes a sleeve (301) that is slidably provided on the outer wall of the inlet / outlet pipe (20). An airflow channel (302) is provided inside the inlet / outlet pipe (20), and a valve core assembly (303) corresponding to the airflow channel (302) is fixedly provided inside the sleeve (301).

2. The gas sampling bag as described in claim 1, characterized in that, The valve core assembly (303) includes a valve stem (3032), which is installed in the sleeve (301) via a bracket (3011). The bracket (3011) is located near the front end of the sleeve (301). The inner end of the valve stem (3032) extends into the inlet / outlet pipe (20) and is fixedly provided with a sealing head (3031) corresponding to the airflow channel (302). A first abutment edge (3033) is fixedly provided on the valve stem (3032). A second abutment edge (3034) corresponding to the first abutment edge (3033) is fixedly provided on the inner wall of the inlet / outlet pipe (20). The second abutment edge (3034) is located in the direction outside the first abutment edge (3033). The first abutment edge (3033) and the second abutment edge (3034) are connected by a spring (3035) sleeved on the valve stem (3032).

3. The gas sampling bag as described in claim 2, characterized in that, The front end of the airflow channel (302) is provided with an flared sealing port (3021) facing outward, and the sealing head (3031) is conical and matches the sealing port (3021) and can be embedded in the sealing port (3021).

4. The gas sampling bag as described in claim 2, characterized in that, The sealing head (3031) is made of rubber or silicone.

5. The gas sampling bag as described in claim 1, characterized in that, The outer wall of the inlet / outlet pipe (20) has multiple grooves (304) parallel to its axial direction. The multiple grooves (304) are distributed circumferentially around the inlet / outlet pipe (20). The inner wall of the sleeve (301) has a protruding sliding edge (305) that is embedded in the multiple grooves (304) and slides.

6. The gas sampling bag as described in claim 5, characterized in that, The outer wall of the inlet / outlet pipe (20) is provided with a ring of limiting edge (306), the limiting edge (306) corresponds to the rear end face of the sleeve (301), the rear end of the sleeve (301) can abut against the limiting edge (306), and the side of the limiting edge (306) facing the sleeve (301) is provided with a first sealing gasket.

7. The gas sampling bag as described in claim 1, characterized in that, The sleeve (301) has an end cap (3012) at its front end, and the end cap (3012) is connected to the sleeve (301) by a flexible connecting strip.

8. The gas sampling bag as described in claim 1, characterized in that, The outer wall of the sleeve (301) is provided with several anti-slip ridges.

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