Special gas analyzing and sampling device

Abstract

The utility model discloses a special gas analyzing and sampling device which comprises a gas collecting cylinder and a hollow air disc rotationally installed at the top end of the gas collecting cylinder, a collecting cavity is formed in the gas collecting cylinder, and a plurality of multipoint gas inlet structures which are annularly distributed at equal intervals are installed at the top end of the hollow air disc. A honeycomb disc is installed at one end in the air collecting cylinder, a rotating connector is installed in the honeycomb disc, an air pipe is installed at the rotating end of the rotating connector, and the top end of the air pipe extends into the hollow air disc and is fixedly connected with the hollow air disc. The multi-point air inlet structure can suck air from different directions, the comprehensiveness and representativeness of sampling are effectively improved, the rotation driving unit drives the air pipe and the hollow air disc to rotate, revolution of the multi-point air inlet structure in the horizontal direction is achieved, the device can flexibly adjust the sampling direction and position, and the sampling efficiency is improved. And insufficient representativeness and sampling deviation possibly existing in a single sampling point are avoided.

Description

Technical Field

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

[0002] Special gas analysis sampling devices usually include key components such as sampling heads, gas transmission systems, analytical instruments, data recording and processing systems, and control units. The sampling head is located in the ambient air and is responsible for collecting target gas samples and ensuring the representativeness and accuracy of the sampling. The gas transmission system includes pipelines and pumps or compressors to transfer the collected gas samples to the analytical instruments. The analytical instruments are core components, and common ones include gas chromatographs, mass spectrometers, or infrared spectrometers, which analyze the composition and concentration of gases by detecting specific molecules or atoms in the gas. The data recording and processing system is responsible for real-time recording and analysis of the data output by the analytical instrument, and is usually equipped with a data logger or computer system. The control unit monitors and coordinates the operation of the entire system to ensure the stability and accuracy of parameters such as gas flow rate, temperature, and pressure; for example, a special gas analysis sampling device disclosed in the authorization announcement number CN213275044U includes a triangular bracket and a filter screen, the outer wall of the connecting rod is fitted with a slider, and the middle inner wall of the slider is provided with a threaded nail, the middle of the rectangular frame is provided with a rotating shaft, and the outer wall of the rotating shaft is connected to a fan blade, the outside of the gas collecting port is connected to a gas collecting pipe, and the inside of the gas collecting pipe is provided with an air intake test tube, the upper end of the air intake test tube is provided with an air intake funnel, and the air intake funnel is provided with a An end cap is provided on the outside of the upper end, a sampling tube is provided on the outside of one side of the gas collecting pipe, and an air outlet is provided on the other end of the sampling tube. Since the fan blades are evenly distributed along the center line of the rotating shaft, the wind force generated by the fan blades will be evenly dispersed inside the gas capture chamber, and the filter in the vacuum pump will block some impurities contained in the air extracted by the fan blades to prevent them from entering the gas delivery chamber and affecting the collection and sampling of special gases. However, this technical solution is mainly a single-point air intake structure during use, and the distribution of special gases in the environment may be uneven, especially in confined spaces or near the gas source. If the sampling point happens to be located in such an area, the sampled gas concentration may be significantly higher and cannot represent the actual concentration distribution in the overall environment, resulting in inaccurate risk assessment or environmental monitoring results. Utility Model Content

[0003] The purpose of the utility model is to provide a special gas analysis sampling device, which drives the air pipe, the neutral air disk and the multi-point air intake structure connected to the rotary joint to rotate through a rotary drive unit. During the process, the vacuum pump works, so that the gas in the environment is sucked into the neutral air disk and the gas collecting cylinder by the multi-point air intake structure, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a special gas analysis sampling device, comprising a gas collecting cylinder and a hollow air disk rotatably installed at the top of the gas collecting cylinder, the gas collecting cylinder is provided with a collecting chamber inside, the top of the hollow air disk is provided with a plurality of multi-point air intake structures distributed in annular shapes with equal intervals, a honeycomb disk is installed at one end inside the gas collecting cylinder, and a rotary joint is installed inside the honeycomb disk, an air pipe is installed at the rotating end of the rotary joint, the top of the air pipe extends to the inside of the hollow air disk and is fixedly connected to the hollow air disk, an air pump is installed inside the gas collecting cylinder below the honeycomb disk, the air inlet end of the air pump and the air outlet end of the rotary joint are connected to each other, a rotary drive unit is installed on the other side of the bottom end of the honeycomb disk, a main shaft is installed on the output end of the rotary drive unit, a gear transmission structure for maintaining power transmission is installed between the main shaft and the air pipe, a control panel is installed on one side of the back of the gas collecting cylinder, and the output end of the control panel is electrically connected to the input end of the air pump and the rotary drive unit.

[0005] Preferably, an exhaust valve is installed at the bottom end of the gas collecting cylinder.

[0006] Preferably, the multi-point air intake structure includes a flat plate installed at the top edge of the hollow air disk, and one-way air nozzles installed on both sides of the top of the flat plate.

[0007] Preferably, the gear transmission structure includes a driving gear plate installed on one end of the main shaft surface and a driven gear plate installed on one end of the air pipe surface.

[0008] Preferably, the rotation drive unit includes a transmission shell installed at the bottom end of the honeycomb disk and a self-locking box on the outer wall of one side of the transmission shell, and the transmission shell and the self-locking box are respectively provided with a pulley transmission structure and a worm gear self-locking structure inside, and a servo motor for driving the pulley transmission structure is installed on the outer wall of one side of the transmission shell.

[0009] Preferably, the pulley transmission structure includes a driving shaft, a driven shaft and track wheels installed on the surfaces of the driving shaft and the driven shaft, which are installed inside the transmission housing; a belt is installed between the two track wheels; the worm gear self-locking structure includes a worm installed inside the self-locking box and a worm wheel installed at one end of the main shaft surface; the worm wheel and the worm are meshed with each other; one end of the worm extends to the interior of the transmission housing and is fixedly connected to one end of the driven shaft.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the special gas analysis sampling device is provided with a multi-point air intake structure and an air pump and other structures that cooperate with each other. For a single multi-point air intake structure, it can inhale gas from different directions by itself, effectively improving the comprehensiveness and representativeness of sampling, and the rotary drive unit realizes the horizontal revolution of the multi-point air intake structure by driving the rotation of the air pipe and the hollow air disk, so that the device can flexibly adjust the sampling direction and position, avoiding the possible lack of representativeness and sampling deviation of a single sampling point, and can perform gas sampling more efficiently, further ensuring the representativeness of the sample and the accuracy of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0012] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0013] Figure 3 The three-dimensional cross-sectional structure of the utility model is shown in FIG. Figure 1 ;

[0014] Figure 4 The three-dimensional cross-sectional structure of the utility model is shown in FIG. Figure 2 ;

[0015] Figure 5 It is a schematic diagram of the three-dimensional cross-sectional structure of the rotary drive unit of the utility model.

[0016] In the figure: 1. air collecting cylinder; 101. collecting chamber; 102. exhaust valve; 2. control panel; 3. hollow air disk; 4. honeycomb disk; 5. rotary joint; 501. air pipe; 6. vacuum pump; 7. rotary drive unit; 701. transmission housing; 702. servo motor; 703. self-locking box; 8. main shaft; 9. gear transmission structure; 10. multi-point air intake structure; 1001. flat plate; 1002. one-way air nozzle. DETAILED DESCRIPTION

[0017] 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. 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.

[0018] See also Figure 1-5, the utility model provides an embodiment: a special gas analysis sampling device, comprising a gas collecting cylinder 1 and a hollow air disk 3 rotatably installed at the top of the gas collecting cylinder 1, a collecting chamber 101 is arranged inside the gas collecting cylinder 1, a plurality of annular multi-point air intake structures 10 with equal spacing are installed at the top of the hollow air disk 3, a honeycomb disk 4 is installed at one end inside the gas collecting cylinder 1, and a rotary joint 5 is installed inside the honeycomb disk 4, an air pipe 501 is installed at the rotating end of the rotary joint 5, the top of the air pipe 501 extends to the inside of the hollow air disk 3 and is fixedly connected to the hollow air disk 3, an air pump 6 is installed inside the gas collecting cylinder 1 below the honeycomb disk 4, the air inlet end of the air pump 6 is connected to the air outlet end of the rotary joint 5, the gas in the external environment can enter the hollow air disk 3 through the negative pressure suction generated by the multi-point air intake structure 10, and diffuse into the collecting chamber 101 of the gas collecting cylinder 1 through the through holes of the honeycomb disk 4;

[0019] A rotation drive unit 7 is installed on the other side of the bottom of the honeycomb plate 4, a main shaft 8 is installed on the output end of the rotation drive unit 7, a gear transmission structure 9 for maintaining power transmission is installed between the main shaft 8 and the air pipe 501, and a control panel 2 is installed on one side of the back of the air collecting cylinder 1, and the output end of the control panel 2 is electrically connected to the air pump 6 and the input end of the rotation drive unit 7;

[0020] The rotary power of the rotary drive unit 7 is transmitted to the main shaft 8, and the main shaft 8 drives the air pipe 501, the hollow air disc 3 and the plurality of multi-point air intake structures 10 to rotate through the gear transmission structure 9. At this time, the plurality of multi-point air intake structures 10 revolve around the central axis of the air collecting cylinder 1 and the hollow air disc 3.

[0021] The multi-point air intake structure 10 includes a flat plate 1001 installed at the top edge of the hollow air disk 3, and one-way air nozzles 1002 installed on both sides of the top of the flat plate 1001. The one-way air nozzle 1002 allows air to pass through itself and enter the hollow air disk 3. When the air pump 6 stops working, the one-way air nozzle 1002 will be in a closed state, and external air can no longer enter the hollow air disk 3.

[0022] An exhaust valve 102 is installed at the bottom of the gas collecting cylinder 1. The hollow air disk 3 and the gas collecting cylinder 1, as part of the sampling head, have good gas collection capabilities and effectively transport the inhaled air sample to the subsequent analytical instrument to ensure the integrity and quality of the sample. The staff can open the exhaust valve 102 to discharge the sample gas for analysis and detection by the staff;

[0023] The gear transmission structure 9 includes a driving toothed disc installed at one end of the main shaft 8 surface and a driven toothed disc installed at one end of the air pipe 501 surface. The rotation drive unit 7 includes a transmission shell 701 installed at the bottom end of the honeycomb disk 4 and a self-locking box 703 on the outer wall of one side of the transmission shell 701. The transmission shell 701 and the self-locking box 703 are respectively provided with a pulley transmission structure and a worm gear self-locking structure. A servo motor 702 for driving the pulley transmission structure is installed on the outer wall of one side of the transmission shell 701.

[0024] The pulley transmission structure includes a driving shaft, a driven shaft and track wheels installed on the surfaces of the driving shaft and the driven shaft installed inside the transmission housing 701, a belt is installed between the two track wheels, and the worm gear self-locking structure includes a worm installed inside the self-locking box 703 and a worm wheel installed on one end of the surface of the main shaft 8, the worm wheel and the worm gear are meshed with each other, one end of the worm gear extends to the inside of the transmission housing 701 and is fixedly connected to one end of the driven shaft;

[0025] During the operation of the rotary drive unit 7, the rotational power of the servo motor 702 is transmitted to the worm in the self-locking box 703 through the belt drive structure in the transmission shell 701, and the worm drives the worm wheel and the main shaft 8 to rotate in turn, and then the main shaft 8 drives the air pipe 501 and the hollow air disk 3 to rotate through the gear transmission structure 9, so that the multi-point air intake structure 10 can continuously change the direction and orientation when taking in air. This coordination allows the gas to be effectively sucked into the hollow air disk 3 and the gas collecting cylinder 1 of the device, without causing the gas concentration to be higher at some positions and lower at other positions due to the fixed sampling point.

[0026] When the embodiment of the present application is in use, the staff first carries the device to the area to be sampled, and turns on the vacuum pump 6 and the rotary drive unit 7 in the device through the control panel 2 to work. The vacuum pump 6 generates suction and makes the air pipe 501 and the interior of the hollow air disk 3 in a negative pressure state. The gas in the external environment can enter the hollow air disk 3 through the negative pressure suction generated by the multi-point air intake structure 10, and diffuse into the collection chamber 101 of the gas collecting cylinder 1 through the through holes of the honeycomb disk 4, thereby completing the gas sampling and collection work. In this process, the rotational power of the rotary drive unit 7 will be transmitted to the main shaft 8, and the main shaft 8 will drive the air pipe 501, the hollow air disk 3 and if so, the gear transmission structure 9. When the multi-point air intake structures 10 rotate, several multi-point air intake structures 10 revolve around the central axis of the gas collecting cylinder 1 and the hollow air disk 3. During the operation of the device, for a single multi-point air intake structure 10, it can inhale gas from different directions, effectively improving the comprehensiveness and representativeness of sampling. The rotary drive unit 7 realizes the horizontal revolution of the multi-point air intake structure 10 by driving the rotation of the air pipe 501 and the hollow air disk 3, so that the device can flexibly adjust the sampling direction and position, avoiding the possible lack of representativeness and sampling deviation of a single sampling point, and can perform gas sampling more efficiently, further ensuring the representativeness of the sample and the accuracy of sampling.

Claims

1. A special gas analysis sampling device, characterized in that: A special gas analysis sampling device, characterized in that it comprises a gas collecting cylinder (1) and a hollow air disk (3) rotatably mounted at the top of the gas collecting cylinder (1), wherein a collecting chamber (101) is arranged inside the gas collecting cylinder (1), and a plurality of annular multi-point air intake structures (10) distributed at equal intervals are mounted on the top of the hollow air disk (3), a honeycomb disk (4) is mounted at one end inside the gas collecting cylinder (1), and a rotating joint (5) is mounted inside the honeycomb disk (4), and an air pipe (501) is mounted at the rotating end of the rotating joint (5), and the top of the air pipe (501) extends to the inside of the hollow air disk (3) and is connected to the hollow air disk (3). ), an air pump (6) is installed inside the air collecting cylinder (1) below the honeycomb plate (4), the air inlet end of the air pump (6) is connected to the air outlet end of the rotary joint (5), a rotary drive unit (7) is installed on the other side of the bottom end of the honeycomb plate (4), a main shaft (8) is installed on the output end of the rotary drive unit (7), a gear transmission structure (9) for maintaining power transmission is installed between the main shaft (8) and the air pipe (501), a control panel (2) is installed on one side of the back of the air collecting cylinder (1), and the output end of the control panel (2) is electrically connected to the air pump (6) and the input end of the rotary drive unit (7).

2. A special gas analysis sampling device according to claim 1, characterized in that: An exhaust valve (102) is installed at the bottom end of the gas collecting cylinder (1).

3. A special gas analysis sampling device according to claim 1, characterized in that: The multi-point air intake structure (10) comprises a flat plate (1001) installed at the top edge of the hollow air disk (3), and one-way air nozzles (1002) installed on both sides of the top of the flat plate (1001).

4. A special gas analysis sampling device according to claim 1, characterized in that: The gear transmission structure (9) comprises a driving gear disc mounted on one end of the surface of the main shaft (8) and a driven gear disc mounted on one end of the surface of the air pipe (501).

5. A special gas analysis sampling device according to claim 1, characterized in that: The rotation drive unit (7) comprises a transmission housing (701) mounted at the bottom end of the honeycomb plate (4) and a self-locking box (703) on an outer wall of one side of the transmission housing (701); a pulley transmission structure and a worm gear self-locking structure are respectively arranged inside the transmission housing (701) and the self-locking box (703); and a servo motor (702) for driving the pulley transmission structure is mounted on an outer wall of one side of the transmission housing (701).

6. A special gas analysis sampling device according to claim 5, characterized in that: The pulley transmission structure comprises a driving shaft and a driven shaft installed inside a transmission housing (701), and track wheels installed on the surfaces of the driving shaft and the driven shaft, a belt being installed between the two track wheels, and the worm gear self-locking structure comprises a worm installed inside a self-locking box (703) and a worm wheel installed on one end of the surface of a main shaft (8), the worm wheel and the worm gear meshing with each other, and one end of the worm gear extends into the interior of the transmission housing (701) and is fixedly connected to one end of the driven shaft.

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