An ambient air sampler

Abstract

The utility model discloses an environmental air sampler relates to air sampling equipment technical field, aims at solving the air in lower cylinder and upper cylinder is discharged outward, piston block is affected by filter screen, and it is difficult to discharge the air in upper cylinder outward, and further leads to the air of outside and the air in the inside of upper cylinder intermixes, and the problem of influencing the detection precision of subsequent. Its technical scheme main points are: including upper cylinder, lower cylinder, the electric telescopic link with piston block, the detachable connection between upper cylinder and lower cylinder, the cross section of upper cylinder and lower cylinder inner wall all is rectangular setting, and the inner wall of upper cylinder is set up with the filter screen that the placing groove is rotatably connected on the placing groove. The utility model discloses the air in upper cylinder is extruded through piston block, makes it through the air inlet pipe and discharges outward, to this realizes the effect that the air in upper cylinder and lower cylinder is completely discharged, and further prevents the air of inhaling and the air in upper cylinder from mixing, improves the detection precision of subsequent.

Description

Technical Field

[0001] This utility model relates to the field of air sampling equipment technology, and more specifically, to an ambient air sampler. Background Technology

[0002] Air samplers, as a type of detection equipment, draw air into the sampler through an air sampling tube. The air is then analyzed by a detector inside the sampler, thereby providing an early warning of fires.

[0003] Publication number CN221528128U discloses an ambient air sampler, the technical solution of which includes a lower cylinder and an upper cylinder. An installation frame is provided between the lower cylinder and the upper cylinder. A filter screen is fixedly connected to the inner side wall of the installation frame. The lower cylinder and the upper cylinder are connected by a connecting ring. An electric telescopic rod is fixedly connected to the side wall of the lower cylinder. The electric telescopic rod passes through the side wall of the lower cylinder. A piston block is fixedly connected to the telescopic end of the electric telescopic rod. The piston block slides in the lower cylinder. An air collector is fixedly connected to the side wall of the piston block.

[0004] When the above-mentioned technical solution uses an air sampler to detect air, the piston block is moved upward by an electric telescopic rod, which simultaneously discharges the air in the lower and upper cylinders. Then, the piston block is driven downward, which simultaneously draws outside air into the upper cylinder through the air inlet pipe. The air is filtered by a filter screen between the lower and upper cylinders, and the filtered air enters the lower cylinder. The filter screen prevents impurities such as insects and dust from entering the lower cylinder, thus improving the detection effect.

[0005] However, when expelling air from the lower and upper cylinders, the piston block needs to be driven to move towards the upper cylinder. In the aforementioned technology, a filter screen is installed between the upper and lower cylinders. At this time, the piston block will be affected by the filter screen and will not be able to move into the upper cylinder. This makes it difficult for the piston block to expel air from the upper cylinder. Consequently, when outside air is subsequently drawn into the upper and lower cylinders, the outside air will mix with the original air in the upper cylinder, affecting the accuracy of subsequent detection.

[0006] Therefore, a new solution is needed to address this problem. Utility Model Content

[0007] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an ambient air sampler that solves the problem that when air is discharged from the lower and upper cylinders, the piston block is affected by the filter screen, making it difficult to discharge air from the upper cylinder, which leads to the mixing of outside air and air inside the upper cylinder, affecting the accuracy of subsequent detection.

[0008] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an ambient air sampler, comprising an upper cylinder, a lower cylinder, and an electric telescopic rod with a piston block, wherein the upper cylinder and the lower cylinder are detachably connected, the inner wall cross-sections of the upper cylinder and the lower cylinder are both rectangular, a placement groove is provided on the inner wall of the upper cylinder, a filter screen is rotatably connected to the placement groove, the filter screen and the placement groove are connected by a torsion spring, the electric telescopic rod is fixedly connected to the bottom of the lower cylinder, the piston block is slidably connected to the upper cylinder and the lower cylinder respectively, an air inlet pipe is fixedly connected to the upper cylinder and communicates with its own inner wall, the air inlet pipe is provided with a limiting component for preventing air from the upper cylinder and the lower cylinder from leaking out, and the piston block is provided with a detection component for detecting air.

[0009] By adopting the above technical solution, when using an air sampler to sample air, the restriction component removes the restriction on the air inlet pipe. Then, the output end of the electric telescopic rod drives the piston block towards the filter screen, simultaneously compressing the air in the lower cylinder into the upper cylinder. When the piston block and the filter screen contact each other, the piston block continues to move in the same direction. At this time, the force applied to the piston block on the filter screen causes it to rotate and enter the placement slot. Simultaneously, the torsion spring deforms, and the piston block, no longer restricted by the filter screen, can enter the upper cylinder. The piston block compresses the air in the upper cylinder, causing it to be discharged outwards through the air inlet pipe. This achieves the effect of completely expelling air from both the upper and lower cylinders, preventing the intake air from mixing with the air in the upper cylinder, and improving the subsequent detection accuracy. When it is necessary to introduce outside air into the upper and lower cylinders, the electric telescopic rod... The piston block is driven downwards, creating a pressure difference between the upper cylinder and the outside. Affected by this pressure difference, outside air enters the upper cylinder through the intake pipe, further driving the piston block downwards. When the piston block and filter separate, the torsion spring deforms and returns to its original position, making the filter horizontal. Air entering the upper cylinder at this point is filtered by the filter, removing impurities and improving subsequent air detection accuracy. When the air in the upper and lower cylinders reaches saturation, a limiting component restricts the intake pipe to prevent leakage. Simultaneously, a detection component detects the air, thus completing the air detection process. The placement slot allows the piston block to pass through the filter and expel air from the upper cylinder, preventing outside air from mixing with the air inside the upper cylinder and improving detection accuracy.

[0010] The present invention is further configured such that: the limiting component includes a rotating tube rotatably connected to the upper cylinder, the center of the rotating tube is located at the outer wall of the air inlet pipe and the outer wall of the air inlet pipe and the inner wall of the rotating tube are tangent to each other, an adjusting plate is fixedly connected to the inner wall of the rotating tube, the adjusting plate and the top of the air inlet pipe are in contact with each other, and a through hole is provided on the adjusting plate for the air inlet pipe to communicate with the outside.

[0011] By adopting the above technical solution, when the intake pipe is restricted from communicating with the outside, rotating the rotating tube causes the adjusting plate and the through hole to rotate simultaneously. Since the center of the rotating tube is located on the side wall of the intake pipe and the intake pipe and rotating tube are tangentially positioned, a deviation occurs between the through hole and the intake pipe opening when the through hole rotates. This results in the through hole and the intake pipe opening being staggered. At this point, the intake pipe is restricted by the adjusting plate's contact with its own opening and the position of the through hole, preventing communication with the outside. When the restriction on the intake pipe is lifted, rotating the adjusting plate drives the through hole back to its original position, connecting the through hole and the intake pipe. At this point, the intake pipe opening is no longer restricted and can communicate with the outside, thus achieving the effect of adjusting the opening and closing of the intake pipe.

[0012] The present invention is further configured such that: a flexible block is fixedly connected to the inner wall of the rotating tube, and a slot is provided on the outer wall of the air inlet tube for the flexible block to engage; when the flexible block and the slot engage with each other, the through hole and the air inlet tube are interconnected.

[0013] By adopting the above technical solution, when the rotating tube rotates, the flexible block will rotate with the rotating tube. When the through hole and the air inlet pipe are connected to each other, the flexible block and the slot are engaged with each other. By setting the flexible block and the slot, the position of the through hole and the air inlet pipe being connected to each other can be positioned. At the same time, when the through hole and the air inlet pipe are connected to each other, the rotating tube can be restricted to prevent the rotating tube from rotating.

[0014] The present invention is further configured such that: the detection component includes an air detector; a sliding groove is provided on the piston block for the air detector to slide; a plurality of connecting rods are fixedly connected to the electric telescopic rod; a through groove is provided at the bottom of the sliding groove for the connecting rods to slide; and a sealing gasket is fixedly connected to the bottom of the air detector.

[0015] By adopting the above technical solution, when the electric telescopic rod drives the piston block to move upward, the connecting rod and the through groove separate from each other. At this time, the air detector will slide into the slide groove due to its own weight. The slide groove can protect the air detector. At the same time, when the air detector slides into the slide groove, the sealing gasket will come into contact with the through groove. The sealing gasket can block the through groove and prevent it from affecting the piston block's compression of air. When the electric telescopic rod drives the piston block to move downward and return to its original position, outside air will be drawn into the upper and lower cylinders. At this time, the connecting rod inserts into the through groove and pushes the air detector upward along the slide groove. At this time, the air detector is fully exposed to the air in the lower cylinder. The air detector can detect the air in the lower cylinder, thereby achieving the effect of air detection.

[0016] The present invention is further configured such that a groove for the rotation of the filter screen is provided on the side of the upper cylinder away from the rotation point of the filter screen.

[0017] By adopting the above technical solution, the rotation direction of the filter screen can be restricted, thereby improving the stability of the filter screen when it is in a horizontal state.

[0018] The present invention is further configured such that: an installation ring is fixedly connected to the outer wall of the lower cylinder, and the upper cylinder is threadedly connected to the inner wall of the installation ring.

[0019] By adopting the above technical solution, the installation ring facilitates the installation of the upper and lower cylinders. At the same time, the threaded connection improves the sealing effect between the installation ring and the upper cylinder, preventing air leakage from the upper and lower cylinders.

[0020] The present invention is further configured such that sealing rings are fixedly connected to the openings of both the upper and lower cylinders.

[0021] By adopting the above technical solution, the sealing effect between the upper cylinder and the lower cylinder can be improved.

[0022] In summary, this utility model has the following beneficial effects:

[0023] When using an air sampler to sample air, the piston block and filter screen are brought into contact. The piston block drives the filter screen to rotate and enter the placement slot. At this time, the piston block is no longer restricted by the filter screen and can enter the upper cylinder. The piston block compresses the air in the upper cylinder and forces it out through the air inlet pipe. This achieves the effect of completely expelling the air from the upper and lower cylinders, thereby preventing the intake air from mixing with the air in the upper cylinder and improving the accuracy of subsequent detection. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the external structure of this utility model;

[0025] Figure 2 A cross-sectional view of this utility model Figure 1 ;

[0026] Figure 3 for Figure 2 Enlarged view of point A;

[0027] Figure 4 A cross-sectional view of this utility model Figure 2 ;

[0028] Figure 5 A cross-sectional view of this utility model Figure 3 .

[0029] In the diagram: 1. Upper cylinder; 2. Lower cylinder; 3. Piston block; 4. Electric telescopic rod; 5. Placement slot; 6. Filter screen; 7. Torsion spring; 8. Air inlet pipe; 9. Rotating pipe; 10. Adjusting plate; 11. Through hole; 12. Flexible block; 13. Slot; 14. Air detector; 15. Slide groove; 16. Connecting rod; 17. Through groove; 18. Sealing gasket; 19. Groove; 20. Mounting ring; 21. Sealing ring. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0031] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] An ambient air sampler, such as Figures 1-5As shown, the device includes an upper cylinder 1, a lower cylinder 2, and an electric telescopic rod 4 with a piston block 3. A mounting ring 20 is fixedly connected to the outer wall of the lower cylinder 2. The upper cylinder 1 and the inner wall of the mounting ring 20 are threaded together. The mounting ring 20 facilitates the installation of the upper cylinder 1 and the lower cylinder 2. The threaded connection improves the sealing effect between the mounting ring 20 and the upper cylinder 1, preventing air leakage from the upper cylinder 1 and the lower cylinder 2. Sealing rings 21 are fixedly connected to the openings of both the upper cylinder 1 and the lower cylinder 2, further enhancing the sealing effect. A placement groove 5 is provided on the inner wall of the upper cylinder 1. A filter screen 6 is rotatably connected to the upper cylinder 1. The filter screen 6 and the placement groove 5 are connected by a torsion spring 7. A groove 19 for the filter screen 6 to rotate is provided on the side of the upper cylinder 1 away from the rotation of the filter screen 6. This can limit the rotation direction of the filter screen 6 and improve the stability of the filter screen 6 when it is in a horizontal state. The cross-section of the inner wall of the upper cylinder 1 and the lower cylinder 2 is rectangular, which can facilitate the rotation of the filter screen 6 in the upper cylinder 1. At the same time, it can also facilitate the entry of the piston block 3 into the upper cylinder 1. The electric telescopic rod 4 is fixedly connected to the bottom of the lower cylinder 2. The piston block 3 is slidably connected to the upper cylinder 1 and the lower cylinder 2 respectively. An air inlet pipe 8 that is connected to the inner wall of the upper cylinder 1 is fixedly connected to the upper cylinder 1.

[0034] When the air inside the upper cylinder 1 and lower cylinder 2 is discharged outward, the output end of the electric telescopic rod 4 drives the piston block 3 to move towards the filter screen 6. At the same time, the air inside the lower cylinder 2 is squeezed into the upper cylinder 1. When the piston block 3 and the filter screen 6 come into contact with each other, the piston block 3 continues to move in the same direction. At this time, the piston block 3 on the filter screen 6 rotates due to the force applied to it and enters the placement groove 5. At the same time, the torsion spring 7 deforms. At this time, the piston block 3 is no longer restricted by the filter screen 6 and can enter the upper cylinder 1. The piston block 3 squeezes the air inside the upper cylinder 1 and discharges it outward through the air inlet pipe 8. This achieves the effect of completely discharging the air inside the upper cylinder 1 and lower cylinder 2, thereby preventing the intake air from mixing with the air inside the upper cylinder 1 and improving the accuracy of subsequent detection.

[0035] When outside air needs to be introduced into the upper cylinder 1 and lower cylinder 2, the piston block 3 is driven downward by the electric telescopic rod 4. At the same time, a pressure difference is generated between the upper cylinder 1 and the outside. Affected by the pressure difference, the outside air enters the upper cylinder 1 through the air inlet pipe 8. Then, the piston block 3 continues to move downward. When the piston block 3 and the filter screen 6 separate, the torsion spring 7 deforms and returns to its original position, making the filter screen 6 horizontal. At this time, the air entering the upper cylinder 1 will be affected by the filter screen 6, filtering out impurities in the air and further improving the accuracy of subsequent air detection.

[0036] like Figures 1-3As shown, the intake pipe 8 is equipped with a limiting component to prevent air from leaking out of the upper cylinder 1 and the lower cylinder 2. The limiting component includes a rotating pipe 9 rotatably connected to the upper cylinder 1. The center of the rotating pipe 9 is located on the outer wall of the intake pipe 8, and the outer wall of the intake pipe 8 and the inner wall of the rotating pipe 9 are tangent to each other. An adjusting plate 10 is fixedly connected to the inner wall of the rotating pipe 9. The adjusting plate 10 and the top of the intake pipe 8 are in contact with each other. The adjusting plate 10 has a through hole 11 for the intake pipe 8 to communicate with the outside. When the intake pipe 8 is restricted from communicating with the outside, the rotating pipe 9 is rotated. At the same time, the rotating pipe 9 drives the adjusting plate 10 and the through hole 11 to rotate. Since the center of the rotating pipe 9 is located on the side wall of the intake pipe 8 and the intake pipe 8 and the rotating pipe 9 are tangent to each other, when the through hole 11 rotates, there will be a deviation between the through hole 11 and the opening of the intake pipe 8. Furthermore, the through hole 11 and the opening of the air intake pipe 8 are staggered. At this time, the air intake pipe 8 is restricted by the mutual contact between the adjusting plate 10 and its own opening and the position of the through hole 11, so that the air intake pipe 8 cannot communicate with the outside. When the restriction on the air intake pipe 8 is removed, the adjusting plate 10 is rotated to drive the through hole 11 back to its original position and connect the through hole 11 and the air intake pipe 8. At this time, the opening of the air intake pipe 8 is no longer restricted and can communicate with the outside, thereby achieving the effect of adjusting the opening and closing of the air intake pipe 8.

[0037] Furthermore, a flexible block 12 is fixedly connected to the inner wall of the rotating tube 9, and a slot 13 is provided on the outer wall of the air intake tube 8 for the flexible block 12 to engage. When the flexible block 12 and the slot 13 engage with each other, the through hole 11 and the air intake tube 8 are interconnected. When the rotating tube 9 rotates, the flexible block 12 will rotate with the rotating tube 9. When the through hole 11 and the air intake tube 8 are interconnected, the flexible block 12 and the slot 13 engage with each other. Through the setting of the flexible block 12 and the slot 13, the position of the through hole 11 and the air intake tube 8 interconnected can be positioned. At the same time, when the through hole 11 and the air intake tube 8 are interconnected, the rotating tube 9 can be restricted to prevent the rotating tube 9 from rotating.

[0038] like Figure 2As shown, the piston block 3 is equipped with a detection component for detecting air, including an air detector 14. The piston block 3 has a sliding groove 15 for the air detector 14 to slide in. Several connecting rods 16 are fixedly connected to the electric telescopic rod 4. A through groove 17 is formed at the bottom of the sliding groove 15 for the connecting rods 16 to slide in. A sealing gasket 18 is fixedly connected to the bottom of the air detector 14. When the electric telescopic rod 4 drives the piston block 3 upward, the connecting rods 16 and the through groove 17 separate. At this time, the air detector 14 will slide into the sliding groove 15 due to its own weight. The sliding groove 15 provides protection for the air detector 14. Simultaneously, when the air detector 14 slides into the slide groove 15, the sealing gasket 18 will come into contact with the through groove 17. The sealing gasket 18 can block the through groove 17, preventing the piston block 3 from compressing the air. When the electric telescopic rod 4 drives the piston block 3 to move downward and return to its original position, the outside air will be drawn into the upper cylinder 1 and the lower cylinder 2. At this time, the connecting rod 16 is inserted into the through groove 17 and pushes the air detector 14 upward along the slide groove 15. At this time, the air detector 14 is completely exposed to the air in the lower cylinder 2. The air detector 14 can detect the air in the lower cylinder 2, thereby achieving the effect of air detection.

[0039] The working principle of this utility model is as follows: When the air sampler is used to sample the air, the restriction on the air inlet pipe 8 is removed by the limiting component. Then, the output end of the electric telescopic rod 4 drives the piston block 3 to move towards the filter screen 6. At the same time, the air in the lower cylinder 2 is squeezed into the upper cylinder 1. When the piston block 3 and the filter screen 6 come into contact with each other, the piston block 3 continues to move in the same direction. At this time, the piston block 3 on the filter screen 6 rotates due to the force applied to it and enters the placement groove 5. At the same time, the torsion spring 7 deforms. At this time, the piston block 3 is freed from the restriction of the filter screen 6 and can enter the upper cylinder 1. The piston block 3 squeezes the air in the upper cylinder 1 and discharges it outward through the air inlet pipe 8.

[0040] When outside air needs to be introduced into the upper cylinder 1 and lower cylinder 2, the piston block 3 is moved downward by the electric telescopic rod 4. Simultaneously, a pressure difference is created between the upper cylinder 1 and the outside environment. Affected by this pressure difference, outside air enters the upper cylinder 1 through the air inlet pipe 8. The piston block 3 continues to move downward. When the piston block 3 and the filter screen 6 separate, the torsion spring 7 deforms and returns to its original position, causing the filter screen 6 to be horizontally positioned. At this point, the air entering the upper cylinder 1 is filtered by the filter screen 6, removing impurities. When the air in the upper cylinder 1 and lower cylinder 2 is drawn in... When the system reaches saturation, rotating the rotating tube 9 causes the openings of the through hole 11 and the air inlet pipe 8 to be staggered. At this time, the air inlet pipe 8 is restricted by the fit between the adjusting plate 10 and its own opening, as well as the position of the through hole 11, preventing the air inlet pipe 8 from communicating with the outside world and preventing air leakage. At the same time, the air detector 14 detects the air in the lower cylinder 2, thus achieving the effect of air detection. The placement groove 5 drives the piston block 3 to pass through the filter screen 6 and discharge the air in the upper cylinder 1 to the outside, preventing the outside air from mixing with the air in the upper cylinder 1 and improving the detection accuracy.

[0041] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An ambient air sampler, comprising an upper cylinder (1), a lower cylinder (2), and an electrically operated telescopic rod (4) with a piston block (3), characterized in that: The upper cylinder (1) and the lower cylinder (2) are detachably connected. The inner walls of the upper cylinder (1) and the lower cylinder (2) are rectangular in cross-section. The inner wall of the upper cylinder (1) is provided with a placement groove (5). A filter screen (6) is rotatably connected to the placement groove (5). The filter screen (6) and the placement groove (5) are connected by a torsion spring (7). The electric telescopic rod (4) is fixedly connected to the bottom of the lower cylinder (2). The piston block (3) is slidably connected to the upper cylinder (1) and the lower cylinder (2) respectively. An air inlet pipe (8) is fixedly connected to the upper cylinder (1) and communicates with its own inner wall. The air inlet pipe (8) is provided with a limiting component to prevent the air in the upper cylinder (1) and the lower cylinder (2) from leaking out. The piston block (3) is provided with a detection component for detecting air.

2. An ambient air sampler according to claim 1, characterized in that: The limiting component includes a rotating tube (9) rotatably connected to the upper cylinder (1). The center of the rotating tube (9) is located at the outer wall of the air inlet pipe (8), and the outer wall of the air inlet pipe (8) and the inner wall of the rotating tube (9) are tangent to each other. An adjusting plate (10) is fixedly connected to the inner wall of the rotating tube (9). The adjusting plate (10) and the top of the air inlet pipe (8) are in contact with each other. A through hole (11) is provided on the adjusting plate (10) to allow the air inlet pipe (8) to communicate with the outside.

3. An ambient air sampler according to claim 2, characterized in that: The inner wall of the rotating tube (9) is fixedly connected to a flexible block (12), and the outer wall of the air inlet tube (8) is provided with a slot (13) for the flexible block (12) to engage. When the flexible block (12) and the slot (13) engage with each other, the through hole (11) and the air inlet tube (8) are connected to each other.

4. An ambient air sampler according to claim 1, characterized in that: The detection assembly includes an air detector (14), a sliding groove (15) for the air detector (14) to slide on the piston block (3), a number of connecting rods (16) fixedly connected to the electric telescopic rod (4), a through groove (17) for the connecting rods (16) to slide on the bottom of the sliding groove (15), and a sealing gasket (18) fixedly connected to the bottom of the air detector (14).

5. An ambient air sampler according to claim 1, characterized in that: The upper cylinder (1) has a groove (19) on the side away from the rotation point of the filter screen (6) for the filter screen (6) to rotate.

6. An ambient air sampler according to claim 1, characterized in that: The lower cylinder (2) is fixedly connected to the outer wall of the mounting ring (20), and the upper cylinder (1) and the inner wall of the mounting ring (20) are threaded together.

7. An ambient air sampler according to claim 1, characterized in that: Both the upper cylinder (1) and the lower cylinder (2) are fixedly connected with sealing rings (21).

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