An environmental detection gas collection device

Abstract

The utility model relates to environmental detection technical field, concretely relates to an environmental detection gas collecting device, include: mounting panel, handheld mechanism, fixedly connected in the connecting seat of mounting panel outside, the connecting seat outside is provided with rotatable U -shaped support, install detachable handheld pole on the U -shaped support, gas collecting mechanism, including two symmetrical fixedly connected in the U -shaped seat of mounting panel outside, two U -shaped seat inside all are provided with detachable collection cylinder, the air inlet of collection cylinder is fixedly connected with air inlet pipe, the inside of collection cylinder is provided with piston block, the utility model discloses a handheld mechanism is arranged, when the gas of environment is collected, can adjust the direction of mounting panel through servo motor, thereby cooperate handheld pole, lift gas collecting mechanism to high place or deep pit, carry out the collection to the gas of high place or deep pit, not easy to be limited by equipment or topography, has good applicability.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring technology, specifically to an environmental monitoring gas collection device. Background Technology

[0002] In fields such as environmental science, industrial safety, and public health, qualitative and quantitative analysis of specific gaseous components in the air (such as volatile organic compounds (VOCs), hydrogen sulfide, sulfur dioxide, and nitrogen oxides) is a crucial prerequisite. Effective gas sample collection is the key first step in ensuring the accuracy and reliability of subsequent analytical results. Currently, commonly used gas collection methods mainly include passive sampling and active sampling methods.

[0003] Passive sampling methods typically rely on the natural diffusion or permeation of gases to adsorb the target gas into a sampling tube filled with a specific adsorbent (such as activated carbon, Tenax tubes, etc.); active sampling methods use a power pump to draw ambient gas through a sampling tube or collection container filled with an adsorbent at a constant flow rate.

[0004] Traditional active sampling devices are limited by their size, making it difficult to collect gases at certain heights or depths, resulting in poor applicability. In addition, some gas collection devices lack a good sealing structure, which can lead to the desorption of adsorbed gases or contamination by outside air, affecting the accuracy of the detection data. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an environmental gas collection device that can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides an environmental monitoring gas collection device, comprising: Mounting plate; The handheld mechanism is fixedly connected to the connecting seat on the outside of the mounting plate. A rotatable U-shaped frame is provided on the outside of the connecting seat, and a detachable handheld rod is installed on the U-shaped frame. The gas collection mechanism includes two U-shaped seats that are symmetrically and fixedly connected to the outside of the mounting plate. Each of the two U-shaped seats has a detachable collection cylinder inside. The air inlet of the collection cylinder is fixedly connected to an air inlet pipe. A piston block is provided inside the collection cylinder. A piston rod is fixedly connected to the outside of the piston block. A sealing assembly for sealing the air inlet pipe is provided on the outside of the piston rod. An electric telescopic rod for driving the piston rod to move is provided on the top of the mounting plate.

[0007] Preferably, the outer side of the U-shaped frame has a through threaded hole, and the end of the hand handle near the U-shaped frame is fixedly connected to a threaded rod, which is threadedly connected to the inner wall of the threaded hole.

[0008] Preferably, a servo motor is installed on the outside of the U-shaped frame, the output shaft of the servo motor is fixedly connected to a transmission shaft, the end of the transmission shaft away from the servo motor extends into the interior of the U-shaped frame and is rotatably connected to the inner wall of the U-shaped frame through a bearing, and the connecting seat is fixedly connected to the outside of the transmission shaft.

[0009] Preferably, the telescopic end of the electric telescopic rod is fixedly connected to a connecting plate, and the top of the connecting plate has two symmetrically distributed slots. The end of the piston rod away from the piston block is fixedly connected to an insert block.

[0010] Preferably, a stop block is fixedly connected to the outside of the collecting cylinder, and a mounting base is fixedly connected to the outside of the electric telescopic rod, with the mounting base fixedly connected to the outside of the mounting plate.

[0011] Preferably, the sealing assembly includes an L-shaped rod, which is fixedly connected to the outside of the piston rod. A fixing block is fixedly connected to the end of the L-shaped rod away from the piston rod, and a sealing plug is fixedly connected to the side of the fixing block near the intake pipe.

[0012] Preferably, the sealing assembly further includes a three-way valve, which is fixedly connected to the air intake pipe, and a sampling tube is provided at the other outlet of the three-way valve.

[0013] The technical solution provided by this utility model has the following advantages compared with the known prior art: 1. This utility model, by setting a handheld mechanism, allows the direction of the mounting plate to be adjusted by a servo motor when collecting ambient gas. This, in conjunction with the handheld lever, lifts the gas collection mechanism to a high place or a deep pit for gas collection. It is not easily limited by equipment or terrain and has good applicability.

[0014] 2. This utility model uses a gas collection mechanism. When collecting gas from the environment, the electric telescopic rod drives two piston rods to move synchronously through the connecting plate and the insert block to collect the gas from the environment. As the piston rods move, they drive the sealing plug to move towards the air inlet pipe until the sealing plug blocks the air inlet of the air inlet pipe. Under the action of the sealing plug, external gas can be prevented from mixing in, ensuring the accuracy of data during subsequent gas detection. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the environmental gas collection device of this utility model; Figure 2 This is a partial exploded structural diagram of the U-shaped frame of this utility model; Figure 3 This is a schematic diagram of the mounting plate structure of this utility model; Figure 4 This is a schematic diagram of the exploded structure of the collection cylinder of this utility model; Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle.

[0017] The labels in the diagram represent: 1. Mounting plate; 2. Handheld mechanism; 21. Handheld lever; 22. Threaded rod; 23. Servo motor; 24. Threaded hole; 25. U-shaped frame; 26. Drive shaft; 27. Connecting seat; 3. Gas collection mechanism; 31. Electric telescopic rod; 32. Sealing assembly; 321. Fixing block; 322. L-shaped rod; 323. Sealing plug; 324. Three-way valve; 325. Sampling tube; 33. Mounting seat; 34. Stop block; 35. Connecting plate; 351. Slot; 36. Collection cylinder; 361. Piston block; 362. Piston rod; 37. Inlet pipe; 38. Insert block; 39. U-shaped seat. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0019] The present invention will be further described below with reference to the embodiments. Example 1:

[0020] Reference Figure 1-3 This is the first embodiment of the present invention, which discloses an environmental detection gas collection device, comprising: Mounting plate 1 is preferably made of lightweight, high-strength aluminum alloy or engineering plastic to ensure structural strength while reducing overall weight. The handheld mechanism 2 is fixedly connected to the connecting seat 27 on the outside of the mounting plate 1, serving as the rotation fulcrum of the entire mounting plate 1 and its components. A rotatable U-shaped frame 25 is provided on the outside of the connecting seat 27, and a detachable handheld rod 21 is installed on the U-shaped frame 25 to facilitate remote operation by the operator on the ground. Specifically, a through threaded hole 24 is provided on the outer side of the U-shaped frame 25, and a threaded rod 22 is fixedly connected to one end of the hand handle 21 near the U-shaped frame 25. The threaded rod 22 is threadedly connected to the inner wall of the threaded hole 24.

[0021] By screwing the threaded rod 22 into the threaded hole 24, a secure connection can be achieved between the handheld rod 21 and the U-shaped frame 25. This design not only ensures a reliable connection but also facilitates transportation and storage, and allows for the replacement of handheld rods 21 of different lengths as needed.

[0022] Specifically, a servo motor 23 is installed on the outside of the U-shaped frame 25. The output shaft of the servo motor 23 is fixedly connected to a transmission shaft 26. The end of the transmission shaft 26 away from the servo motor 23 extends into the interior of the U-shaped frame 25 and is rotatably connected to the inner wall of the U-shaped frame 25 through a bearing. The connecting seat 27 is fixedly connected to the outside of the transmission shaft 26.

[0023] When the servo motor 23 is started, it can precisely drive the drive shaft 26 and the connecting seat 27 to rotate, thereby enabling the entire mounting plate 1 to be adjusted at any angle from 0 to 360 degrees within the plane of the U-shaped frame 25.

[0024] In practical applications, the operator first holds the entire device using the handheld lever 21. When collecting gas from high locations (such as chimney exhaust outlets or tree canopies), the servo motor 23 can be activated, causing it to rotate the mounting plate 1 directly above the U-shaped frame 25 via the drive shaft 26 and connecting seat 27. At this point, the operator simply needs to lift the handheld lever 21 to easily and stably raise the gas collection mechanism 3 to the target height. Conversely, when collecting gas from deep pits, underground pipes, or low-lying areas, the mounting plate 1 can be rotated into the interior space of the U-shaped frame 25, forming a "basket"-like structure, which is then extended into the area to be measured. This design completely solves the problem of traditional equipment being limited by height or depth, making effective sampling impossible and greatly expanding the application scenarios. Example 2:

[0025] Reference Figure 1-5 This is the second embodiment of the present invention, which differs from the first embodiment in that: The gas collection mechanism 3 includes two U-shaped seats 39 that are symmetrically fixedly connected to the outside of the mounting plate 1. Each of the two U-shaped seats 39 has a detachable collection cylinder 36 inside. The air inlet of the collection cylinder 36 is fixedly connected to an air inlet pipe 37. Inside the collection cylinder 36, there is a piston block 361 that fits tightly against the inner wall of the cylinder. A piston rod 362 is fixedly connected to the outside of the piston block 361 and extends outward through the tail end of the collection cylinder 36. A sealing assembly 32 for sealing the air inlet pipe 37 is provided on the outside of the piston rod 362. An electric telescopic rod 31 for driving the piston rod 362 to move is provided on the top of the mounting plate 1.

[0026] The collection tube 36 can be made of transparent glass or a corrosion-resistant rigid plastic tube.

[0027] Piston block 361 can be made of materials with low adsorption and high sealing properties, such as polytetrafluoroethylene.

[0028] Specifically, the telescopic end of the electric telescopic rod 31 is fixedly connected to a connecting plate 35, and the top of the connecting plate 35 has two symmetrically distributed slots 351. The end of the piston rod 362 away from the piston block 361 is fixedly connected to an insert block 38.

[0029] During installation, simply place the collection tube 36 into the U-shaped seat 39, align the insert 38 and insert it into the corresponding slot 351 to complete the power connection. The operation is extremely simple.

[0030] Specifically, a stop block 34 is fixedly connected to the outside of the collection cylinder 36, and a mounting base 33 is fixedly connected to the outside of the electric telescopic rod 31. The mounting base 33 is fixedly connected to the outside of the mounting plate 1.

[0031] The position of the collecting cylinder 36 is limited by the stop block 34 to prevent the collecting cylinder 36 from moving with the piston rod 362 when the connecting plate 35 moves, thus facilitating the collection of gas.

[0032] Specifically, the sealing assembly 32 includes an L-shaped rod 322, which is fixedly connected to the outside of the piston rod 362. A fixing block 321 is fixedly connected to the end of the L-shaped rod 322 away from the piston rod 362, and a sealing plug 323 is fixedly connected to the side of the fixing block 321 near the intake pipe 37.

[0033] The sealing plug 323 can be made of a highly elastic material such as silicone or rubber, and its shape is precisely matched to the inner wall or port of the air inlet of the air inlet pipe 37.

[0034] Specifically, the sealing assembly 32 also includes a three-way valve 324, which is fixedly connected to the air intake pipe 37, and a sampling tube 325 is provided at the other outlet of the three-way valve 324.

[0035] The intake pipe 37 is arranged in two sections, and the three-way valve 324 is located between the two sections of the intake pipe 37. In addition to the connection between the two sections of the intake pipe 37, the third port of the three-way valve 324 is connected to a sampling pipe 325 for exhausting gas.

[0036] The remaining structure is the same as that in Example 1.

[0037] In this embodiment, when the piston block 361 moves to the bottom of the collection cylinder 36, completing one full stroke, the sealing plug 323 precisely inserts and tightly blocks the air inlet of the air inlet pipe 37. This design achieves an automated process of "sealing upon completion of extraction," effectively preventing external air from mixing into the sample or sample gas leakage after sampling, thus providing a solid foundation for the accuracy of data in subsequent laboratory analysis.

[0038] The workflow of this utility model is as follows: When collecting and detecting gases in the environment, two collection cylinders 36 are placed into two U-shaped seats 39, and the insert block 38 on the piston rod 362 is positioned in the corresponding slot 351 to complete the installation of the collection cylinders 36. Adjust the position of mounting plate 1 according to the location of the gas to be detected; When the detection area is in the pit, the servo motor 23 drives the mounting plate 1 to rotate through the transmission shaft 26 and the connecting seat 27 until the mounting plate 1 is rotated into the U-shaped frame 25. At this time, the mounting plate 1 together with the gas collection mechanism 3 can be put into the pit by using the hand lever 21. When it is necessary to collect gas at a certain height, the servo motor 23 drives the mounting plate 1 to rotate through the transmission shaft 26 and the connecting seat 27 until the mounting plate 1 is rotated above the U-shaped frame 25. At this time, the mounting plate 1 and the gas collection mechanism 3 can be pushed into the air by the hand lever 21 to collect gas in a certain height area. When collecting gas in the detection area, the retraction of the telescopic end of the electric telescopic rod 31 causes the connecting plate 35 to move towards the electric telescopic rod 31. Under the action of the slot 351 and the insert block 38, the two piston rods 362 move with the connecting plate 35. Under the action of the piston block 361, the external gas is sucked into the collection cylinder 36 through the air inlet pipe 37. When the piston rod 362 moves, it drives the sealing plug 323 to move through the L-shaped rod 322 and the fixing block 321 until the sealing plug 323 enters the air inlet pipe 37, thus completing the gas sampling. The sealing plug 323 seals the air inlet of the air inlet pipe 37. After the gas collection is completed, the gas-filled collection cylinder 36 is removed from the U-shaped seat 39. The three-way valve 324 is turned to push the piston rod 362. The gas in the collection cylinder 36 is discharged through the sampling tube 325, which is used by the detection equipment to detect the gas discharged from the sampling tube 325.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. An environmental gas collection device, characterized in that, include: Mounting plate (1); The handheld mechanism (2) is fixedly connected to the connecting seat (27) on the outside of the mounting plate (1). A rotatable U-shaped frame (25) is provided on the outside of the connecting seat (27), and a detachable handheld rod (21) is installed on the U-shaped frame (25). The gas collection mechanism (3) includes two U-shaped seats (39) that are symmetrically fixedly connected to the outside of the mounting plate (1). Each of the two U-shaped seats (39) is provided with a detachable collection cylinder (36). The air inlet of the collection cylinder (36) is fixedly connected to an air inlet pipe (37). The collection cylinder (36) is provided with a piston block (361). The piston block (361) is fixedly connected to the outside of the piston rod (362). The piston rod (362) is provided with a sealing assembly (32) for sealing the air inlet pipe (37). The top of the mounting plate (1) is provided with an electric telescopic rod (31) for driving the piston rod (362) to move.

2. The environmental gas collection device according to claim 1, characterized in that, The U-shaped frame (25) has a through threaded hole (24) on its outer side. The end of the hand handle (21) near the U-shaped frame (25) is fixedly connected to a threaded rod (22), which is threaded to the inner wall of the threaded hole (24).

3. The environmental monitoring gas collection device according to claim 1, characterized in that, A servo motor (23) is installed on the outside of the U-shaped frame (25). The output shaft of the servo motor (23) is fixedly connected to a transmission shaft (26). The end of the transmission shaft (26) away from the servo motor (23) extends into the interior of the U-shaped frame (25) and is rotatably connected to the inner wall of the U-shaped frame (25) through a bearing. The connecting seat (27) is fixedly connected to the outside of the transmission shaft (26).

4. The environmental gas collection device according to claim 1, characterized in that, The telescopic end of the electric telescopic rod (31) is fixedly connected to a connecting plate (35), and the top of the connecting plate (35) has two symmetrically distributed slots (351). The piston rod (362) is fixedly connected to an insert block (38) at the end away from the piston block (361).

5. The environmental monitoring gas collection device according to claim 1, characterized in that, A stop block (34) is fixedly connected to the outside of the collection cylinder (36), and a mounting base (33) is fixedly connected to the outside of the electric telescopic rod (31). The mounting base (33) is fixedly connected to the outside of the mounting plate (1).

6. The environmental monitoring gas collection device according to claim 1, characterized in that, The sealing assembly (32) includes an L-shaped rod (322) which is fixedly connected to the outside of the piston rod (362). A fixing block (321) is fixedly connected to one end of the L-shaped rod (322) away from the piston rod (362). A sealing plug (323) is fixedly connected to the side of the fixing block (321) near the intake pipe (37).

7. The environmental monitoring gas collection device according to claim 1, characterized in that, The sealing assembly (32) also includes a three-way valve (324), which is fixedly connected to the air inlet pipe (37), and a sampling tube (325) is provided at the other outlet of the three-way valve (324).

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