Gas sampling device for gas detection

Abstract

The utility model discloses a gas sampling device for gas detection, and relates to the technical field of environment detection sampling. The device comprises a collection cylinder, one end of the collection cylinder is provided with a cover plate, the other end of the collection cylinder is provided with a filtering mechanism for filtering impurities in a gas sample, the bottom of the filtering mechanism is provided with an exhaust pipe for exhausting the gas sample, and one side wall of the cover plate is provided with an adjusting mechanism for controlling and adjusting the inlet and outlet of the gas sample. After being filtered by the filter screen on the circular plate, the gas sample enters the collection cylinder, impurities such as dust are effectively removed, the purity of the collected gas sample is higher, the accuracy of a detection result is improved, meanwhile, the collection and discharge of the gas sample are conveniently controlled through the matching of the adjusting mechanism and the filtering mechanism, and the detection efficiency is improved. The volume of the gas sample can be accurately controlled, so that the whole operation process is smooth and efficient, the device is more convenient to carry and use, and the convenience of the device is improved.

Description

Technical Field

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

[0002] With the continuous development of social industry, urban air pollution has gradually worsened, bringing many health hazards to residents. Nowadays, environmental protection has gradually been taken seriously, especially air quality. In order to reduce the harm caused by air to residents, it is necessary to detect and find solutions.

[0003] However, in general, operators need to sample and test the gases in different environments separately, and operators usually directly use simple sampling bags or sampling bottles for sampling and testing. These methods are prone to introduce external impurities during the sampling process. These impurities will interfere with the accuracy of the test results, thereby affecting the test results, resulting in inaccurate test results, and it is not convenient to control the gas sample capacity.

[0004] For this purpose, a gas sampling device for gas detection is proposed. Utility Model Content

[0005] The purpose of the utility model is to solve the problems raised by the above-mentioned background technology, and the utility model provides a gas sampling device for gas detection.

[0006] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0007] A gas sampling device for gas detection comprises a collecting tube, one end of which is provided with a cover plate, the other end of which is provided with a filtering mechanism for filtering impurities in the gas sample, an exhaust pipe for discharging the gas sample is provided at the bottom of the filtering mechanism, a regulating mechanism for controlling and regulating the inlet and outlet of the gas sample is provided on one side wall of the cover plate, one end of the regulating mechanism passes through one side of the cover plate and is connected to the filtering mechanism, a handle is fixedly provided on the outer side wall of the collecting tube, and an air inlet hood is provided on one side of the filtering mechanism.

[0008] Furthermore, the filtering mechanism includes a mounting frame, two ends of which are respectively threadedly connected to the collection tube and the air inlet hood, a circular plate is fixedly arranged in the mounting frame, the circular plate is provided with fan-shaped grooves, the fan-shaped grooves are in two groups and are symmetrically arranged, a filter is installed in the fan-shaped grooves, an air outlet pipe is arranged on the circular plate, the air outlet pipe passes through a side wall of the mounting frame, one end of the air outlet pipe is connected to a one-way valve, and one end of the one-way valve is connected to an exhaust pipe.

[0009] Furthermore, the adjustment mechanism includes a rotating partition and a limit block, the rotating partition is rotatably set on the circular plate, the limit block is fixedly set on the inner surface of the mounting frame, the rotating partition is provided with a limit groove, a rectangular rod is fixedly set on the rotating shaft of the rotating partition, a piston block is slidably set in the collection tube, a pull rod is fixedly connected to the piston block, a rectangular groove is opened on the pull rod, the rectangular rod is slidably sleeved in the rectangular groove, the rectangular rod is adapted to the size of the rectangular groove, and fits but is not fixed, and a handle is set at one end of the rectangular groove.

[0010] Furthermore, the size of the rotating partition is larger than the fan-shaped groove, and the height of the limit block is lower than a side wall of the fan-shaped groove.

[0011] Furthermore, the rectangular groove and the cover plate are slidably plugged in, and the rectangular groove and the cover plate are fitted but not fixed.

[0012] Furthermore, an exhaust hole is provided on the surface of the cover plate.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The utility model filters the gas through the filter on the circular plate and then enters the collection tube, effectively removing impurities such as dust, ensuring that the collected gas sample has a higher purity, thereby improving the accuracy of the test result. Subsequently, the pull rod is driven to rotate by rotating the handle, so that the matching rectangular rod on the pull rod rotates synchronously to drive the rotating partition to rotate, so that the operator can easily adjust the angle between the rotating partition and the circular plate to control the collection and discharge of the gas sample. At the same time, the piston block on the pull rod is driven to slide along the inner surface of the collection tube by pulling the handle, so as to achieve precise control of the gas sample capacity, making the entire operation process smooth and efficient, not only making the device more convenient to carry and use, and improving its convenience, but also the operator can complete the gas sampling work at multiple locations in a short time, greatly improving the sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the filtering mechanism and the adjusting mechanism of the utility model;

[0018] Figure numerals: 1. Collection tube; 2. Handle; 3. Cover plate; 4. Exhaust pipe; 5. Air inlet hood; 6. Filter mechanism; 601. Round plate; 602. Fan-shaped groove; 603. Filter net; 604. Mounting frame; 605. Exhaust pipe; 606. One-way valve; 7. Adjustment mechanism; 701. Rotating partition; 702. Limiting groove; 703. Limiting block; 704. Piston block; 705. Pull rod; 706. Rectangular groove; 707. Rectangular rod; 708. Handle; 8. Exhaust hole. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do 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 invention.

[0023] like Figures 1 to 3As shown, a gas sampling device for gas detection includes a collection tube 1, one end of the collection tube 1 is provided with a cover plate 3, the other end of the collection tube 1 is provided with a filter mechanism 6 for filtering impurities in the gas sample, the bottom of the filter mechanism 6 is provided with an exhaust pipe 4 for discharging the gas sample, and a regulating mechanism 7 for controlling and regulating the inlet and outlet of the gas sample is provided on one side wall of the cover plate 3, one end of the regulating mechanism 7 passes through one side of the cover plate 3 and is connected to the filter mechanism 6, a handle 2 is fixedly provided on the outer side wall of the collection tube 1, and an air intake hood 5 is provided on one side of the filter mechanism 6; specifically, when it is necessary to conduct random sampling of the gas to be detected, the device is carried to the target area for sampling operation, firstly, by sleeve-fitting the sampling bag on the exhaust pipe 4, aligning the air intake hood 5 with the sampling area through the handle 2, and then Then pull the adjusting mechanism 7 to collect the gas sample. The gas sample collected in the collection tube 1 is first filtered through the filter mechanism 6 through the air inlet hood 5, which effectively removes impurities such as dust, ensures that the collected gas sample is of higher purity, and thus improves the accuracy of the test result. At the same time, by rotating the adjusting mechanism 7, the adjusting mechanism 7 and the filter mechanism 6 are sealed. This step is simple and quick, and also effectively prevents gas sample leakage. Then push the adjusting mechanism 7 to push the filtered gas sample in the collection tube 1 through the filter mechanism 6 into the sampling bag, which is convenient for precise control of the gas sample capacity, making the entire operation process smooth and efficient, not only making the device more convenient to carry and use, and improving its convenience, but also the operator can complete gas sampling work at multiple locations in a short time, greatly improving the sampling efficiency.

[0024] like Figure 1 , Figure 3As shown, the filtering mechanism 6 includes a mounting frame 604, the two ends of which are respectively threadedly connected to the collection tube 1 and the air inlet cover 5, a circular plate 601 is fixedly arranged in the mounting frame 604, and a fan-shaped groove 602 is opened on the circular plate 601. The fan-shaped grooves 602 are in two groups and are symmetrically arranged. A filter screen 603 is installed in the fan-shaped grooves 602, and an air outlet pipe 605 is arranged on the circular plate 601. The air outlet pipe 605 runs through a side wall of the mounting frame 604, and one end of the air outlet pipe 605 is connected to a one-way valve 606, and one end of the one-way valve 606 is connected to the exhaust pipe 4; specifically, the gas sample collected is first filtered by the filter screen 603 on the circular plate 601 and then enters The gas sample collected in the collection tube 1 is pushed by the adjusting mechanism 7 through the outlet pipe 605 and the one-way valve 606 on the circular plate 601 and discharged through the exhaust pipe 4 to the sampling bag for collection, so that gas sampling work at multiple locations can be completed in a short time, which greatly improves the sampling efficiency. The one-way valve 606 prevents external air from entering the collection tube 1 along the outlet pipe 605, thereby ensuring the high quality of the collected gas sample and avoiding the adverse effects of impurities on the test results.

[0025] like Figure 2 , Figure 3 As shown, the adjustment mechanism 7 includes a rotating baffle 701 and a limit block 703, the rotating baffle 701 is rotatably set on the circular plate 601, the limit block 703 is fixedly set on the inner surface of the mounting frame 604, the rotating baffle 701 is provided with a limit groove 702, a rectangular rod 707 is fixedly set on the rotating shaft of the rotating baffle 701, a piston block 704 is slidably set in the collection tube 1, a pull rod 705 is fixedly connected to the piston block 704, a rectangular groove 706 is set on the pull rod 705, the rectangular rod 707 is slidably sleeved in the rectangular groove 706, and the rectangular rod 707 is slidably sleeved in the rectangular groove 706. The rectangular groove 706 is adapted in size and fits but is not fixed, and a handle 708 is provided at one end of the rectangular groove 706; specifically, by rotating the handle 708, the pull rod 705 is driven to rotate, so that the matching rectangular rod 707 on the pull rod 705 is synchronously rotated to drive the rotating partition 701 to rotate, so that the operator can easily adjust the angle between the rotating partition 701 and the circular plate 601 to control the collection and discharge of the gas sample. At the same time, by pulling the piston block 704 on the pull rod 705 to slide along the inner surface of the collection tube 1, the volume of the gas sample discharged from the collection tube 1 into the sampling bag can be accurately controlled.

[0026] like Figure 3As shown, the size of the rotating partition 701 is larger than the fan-shaped groove 602, and the height of the limit block 703 is lower than the side wall of the fan-shaped groove 602; specifically, the rotating partition 701 can cover the fan-shaped groove 602 on the circular plate 601, thereby improving the air tightness in the collection tube 1, and the limit block 703 lower than one side of the fan-shaped groove 602 is convenient for the rotating partition 701 to engage with the limit groove 702 on the rotating partition 701 after rotation, so that the limit groove 702 can fit well with the fan-shaped groove 602 on the circular plate 601, thereby improving the air tightness of the device.

[0027] like Figure 2 As shown, the rectangular groove 706 is slidably plugged into the cover plate 3, and the rectangular groove 706 is in contact with the cover plate 3 but not fixed; specifically, it is convenient to pull the rectangular groove 706 to slide along the cover plate 3 by the handle 708, and the movement trajectory is more stable and reliable.

[0028] like Figure 2 As shown, an exhaust hole 8 is opened on the surface of the cover plate 3; specifically, when the adjusting mechanism 7 is pulled by the collecting tube 1, the air on the rear side is discharged through the exhaust hole 8, thereby reducing the resistance when the adjusting mechanism 7 is pulled.

[0029] In summary: when it is necessary to conduct random sampling of the gas to be detected, the device is carried to the target area for sampling. First, the sampling bag is put on the exhaust pipe 4, and the air inlet hood 5 is aimed at the sampling area through the handle 2, and then the adjustment mechanism 7 is pulled to collect the gas sample. The gas sample collected in the collection tube 1 is first filtered through the air inlet hood 5 and the filter mechanism 6, which effectively removes impurities such as dust, ensures that the collected gas sample is purer, and thus improves the accuracy of the test result. At the same time, the adjustment mechanism 7 is rotated to seal the adjustment mechanism 7 and the filter mechanism 6. This step is simple and quick, and also effectively prevents gas sample leakage. Then, the adjustment mechanism 7 is pushed to push the filtered gas sample in the collection tube 1 through the filter mechanism 6 into the sampling bag, which is convenient for precise control of the gas sample capacity, making the entire operation process smooth and efficient, not only making the device more convenient to carry and use, and improving its convenience, but also the operator can complete gas sampling work at multiple locations in a short time, greatly improving the sampling efficiency.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A gas sampling device for gas detection, characterized in that: The invention comprises a collection tube (1), one end of which is provided with a cover plate (3), the other end of which is provided with a filter mechanism (6) for filtering gas sample impurities, the bottom of which is provided with an exhaust pipe (4) for discharging the gas sample, a regulating mechanism (7) for controlling and regulating the inflow and outflow of the gas sample is provided on a side wall of the cover plate (3), one end of which passes through one side of the cover plate (3) and is connected to the filter mechanism (6), a handle (2) is fixedly provided on the outer side wall of the collection tube (1), and an air inlet cover (5) is provided on one side of the filter mechanism (6).

2. A gas sampling device for gas detection according to claim 1, characterized in that: The filtering mechanism (6) comprises a mounting frame (604), the two ends of which are respectively threadedly connected to the collecting tube (1) and the air inlet hood (5), a circular plate (601) is fixedly arranged inside the mounting frame (604), the circular plate (601) is provided with fan-shaped grooves (602), the fan-shaped grooves (602) are in two groups and are symmetrically arranged, a filter screen (603) is installed inside the fan-shaped grooves (602), an air outlet pipe (605) is arranged on the circular plate (601), the air outlet pipe (605) passes through a side wall of the mounting frame (604), one end of the air outlet pipe (605) is connected to a one-way valve (606), and one end of the one-way valve (606) is connected to an exhaust pipe (4).

3. A gas sampling device for gas detection according to claim 2, characterized in that: The adjustment mechanism (7) comprises a rotating baffle (701) and a limit block (703); the rotating baffle (701) is rotatably arranged on the circular plate (601); the limit block (703) is fixedly arranged on the inner surface of the mounting frame (604); a limit groove (702) is provided on the rotating baffle (701); a rectangular rod (707) is fixedly arranged on the rotating shaft of the rotating baffle (701); a piston block (704) is slidably arranged in the collection tube (1); a pull rod (705) is fixedly connected to the piston block (704); a rectangular groove (706) is provided on the pull rod (705); the rectangular rod (707) is slidably sleeved in the rectangular groove (706); the rectangular rod (707) and the rectangular groove (706) are adapted in size and fit but not fixed; a handle (708) is provided at one end of the rectangular groove (706).

4. A gas sampling device for gas detection according to claim 3, characterized in that: The size of the rotating partition (701) is larger than the fan-shaped groove (602), and the height of the limiting block (703) is lower than a side wall of the fan-shaped groove (602).

5. A gas sampling device for gas detection according to claim 3, characterized in that: The rectangular groove (706) and the cover plate (3) are arranged in a sliding manner, and the rectangular groove (706) and the cover plate (3) are fitted but not fixed.

6. A gas sampling device for gas detection according to claim 1, characterized in that: An exhaust hole (8) is provided on the surface of the cover plate (3).

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