Workplace multichannel gas sampling and detecting all-in-one machine and sampling and detecting method

Abstract

The invention discloses a multi-channel gas sampling and detecting all-in-one machine for a workplace and a sampling and detecting method, and belongs to the field of gas sampling. The device comprises a gas sampling machine, sampling bottles are installed on the periphery of the gas sampling machine, and an outer ring channel, an inner ring channel, a gas inlet assembly, a gas outlet assembly and an auxiliary assembly are arranged outside the gas sampling machine; the gas inlet end of the sampling bottle is sleeved with a front pipeline; a plurality of mutually communicated gas collecting bins are formed between the inner ring channel and the outer ring channel; the air inlet assembly is mounted on the outer ring channel; the air outlet assembly is mounted on the inner ring channel; the auxiliary assembly is installed on the outer ring channel and introduces inert gas into the gas collection bin. Meanwhile, inert gas is introduced into the gas collection bin through the auxiliary assembly, the flowing speed of the air into the gas outlet assembly and the front pipeline is increased, and the problem that the flowing speed of the air into the sampling pipe is reduced due to the blocked filter element, so that the amount of the air entering the sampling pipe is reduced, and a gas detection result is deviated is solved.

Description

Technical Field

[0001] This invention relates to the field of gas sampling, and in particular to a multi-channel gas sampling and detection integrated machine and sampling and detection method for workplaces. Background Technology

[0002] Gas sampling is the process of collecting samples of pollutants or contaminated air from the atmosphere. It is primarily used in environmental monitoring, industrial pollution control, and public health emergencies to obtain pollutant concentration data. Sampling methods fall into two categories: one uses liquid or solid absorbents to enrich low-concentration pollutants, such as the extraction method or membrane filtration method, which can determine the average concentration over a sampling period; the other uses containers to directly collect contaminated air for determining instantaneous or short-term concentrations. The sampling method must be selected based on the purpose, requiring representative samples and ease of operation.

[0003] Conventional gas sampling and detection methods primarily utilize a miniature vacuum pump to create negative pressure, drawing air into a sampling tube filled with a specific adsorbent. The target gas is trapped and enriched by the adsorbent, while the remaining gases are discharged. After sampling, the target gas is desorbed through heating or solvent elution and then sent to the detection unit. However, conventional detection methods have the following drawbacks: When using sampling tubes with different adsorbents to detect air in the same area, it is necessary to quantify the air, meaning the amount of air adsorbed into each sampling tube must be the same. Simultaneously, the speed and time of the vacuum pump's gas extraction must be fixed. However, during air sampling, corresponding filters are needed to intercept airborne particles. After prolonged use, impurities can clog the filters, reducing the airflow speed into the sampling tube. With the vacuum pump's extraction speed and time remaining constant, this reduced airflow speed can easily lead to a decrease in the amount of air entering the sampling tube, resulting in inaccurate gas detection results. Summary of the Invention

[0004] This invention provides a multi-channel gas sampling and detection integrated machine and sampling and detection method for the workplace. It can solve the problem that when the filter element in front of the sampling tube is blocked, the speed at which air flows into the sampling tube will decrease. Under the premise that the speed and time of gas extraction by the vacuum pump remain unchanged, the amount of air entering the sampling tube will decrease, which will lead to deviation in the gas detection results.

[0005] One of the objectives of this invention is achieved through the following technical solution: In a first aspect, this application provides a multi-channel gas sampling and detection integrated machine for the workplace, including a gas sampler, wherein sampling bottles are installed around the gas sampler, and the gas sampler is provided with an outer ring channel, an inner ring channel, an inlet component, an outlet component, and auxiliary components. The gas sampler is equipped with a moving component at the bottom, which moves the sampling bottle back and forth. The sampling bottle is fitted with a pre-connected pipe at the air inlet end; The inner ring channel is slidably disposed at the inner ring of the outer ring channel, and multiple interconnected gas collection chambers are formed between the inner ring channel and the outer ring channel; The air intake assembly is installed on the outer ring channel to introduce a fixed amount of air into the air collection chamber; The air outlet component is installed on the inner ring channel, and the air in the air collection chamber is introduced into the sampling bottle through the pre-pipe; The auxiliary component is installed on the outer ring channel. The auxiliary component introduces inert gas into the gas collection chamber, which in turn drives the air in the gas collection chamber into the sampling bottle.

[0006] A further aspect of the present invention is that: the moving component includes a servo cylinder; the sampling bottle is mounted around the gas sampler via a mounting bracket; a pair of clamps are fixedly connected around the gas sampler; the mounting bracket is slidably mounted between the two clamps; the servo cylinder is fixedly mounted on the gas sampling bottle; the servo cylinder is located at the bottom of the mounting bracket and its output end is fixedly connected to the mounting bracket.

[0007] A further aspect of the present invention is that: a rotating plate is fixedly connected to the bottom of the gas sampler, a support plate is provided at the bottom of the rotating plate and is rotatably connected to the support plate through a bearing, a servo motor is fixedly connected to the bottom of the support plate, the output end of the servo motor is fixedly connected to the rotating plate, and the inner ring channel is fixedly connected to the rotating plate through a connecting rod; The gas collection chamber includes a front chamber and a rear chamber, with the front chamber located within the outer ring channel and the rear chamber located within the inner ring channel.

[0008] A further aspect of the present invention is that: the air intake assembly includes an air pump, the air pump is fixedly mounted on a support plate via a mounting platform, a connecting pipe is sleeved at the air outlet end of the air pump, a valve is rotatably connected inside the connecting pipe via a bearing, a handle is fixedly connected to the connecting pipe, the handle is fixedly connected to the valve via a coupling shaft, a filter chamber is sleeved at one end of the connecting pipe, a filter screen is fixedly connected inside the filter chamber, a flow valve is fixedly installed at one end of the filter chamber, and one end of the flow valve is fixedly connected to the outer ring channel and communicates with the front compartment.

[0009] A further aspect of the present invention is that: the air outlet assembly includes an air outlet pipe, the air outlet pipe is fixedly installed on the inner ring channel and communicates with the rear compartment, a filter element is fixedly installed inside the air outlet pipe, an outer connecting pipe is fixedly installed on the inner wall of the air outlet pipe near the port, sliding grooves are provided on both sides of the inner wall of the outer connecting pipe, a metal sealing plate is slidably installed inside the outer connecting pipe, the outer periphery of the metal sealing plate is fitted to the inner wall of the outer connecting pipe through a sealing ring, right-angle plates are fixedly connected to both ends of the side of the metal sealing plate away from the air outlet pipe, the right-angle plates are slidably disposed in the sliding grooves, and return springs are fixedly connected to both sides of the right-angle plates, the return springs are sleeved in the sliding grooves.

[0010] A further aspect of the present invention is as follows: an inner connecting pipe is fixedly connected to one end of the pre-connecting pipe, the diameter of the inner connecting pipe being larger than the diameter of the pre-connecting pipe, the inner connecting pipe being sleeved inside the outer connecting pipe, sliding grooves being provided on both sides of the inner wall of the pre-connecting pipe, a movable sealing plate being slidably disposed inside the pre-connecting pipe, angle plates being fixedly connected to both sides of the movable sealing plate away from the inner connecting pipe, the angle plates being slidably disposed within the sliding grooves, a compression spring being fixedly connected to the side of the angle plate near the inner connecting pipe, the compression spring being located within the sliding grooves, and a magnetic block being fixedly installed on one side of the movable sealing plate, the magnetic block being magnetically connected to the metal sealing plate.

[0011] A further aspect of the present invention is that: the auxiliary component includes an inert gas generator, the inert gas generator is fixedly mounted on the support plate via a fixed platform, a gas flow pipe is fixedly mounted on the output end of the inert gas generator, the gas flow pipe is fixedly mounted on the outer ring channel and communicates with the front compartment, and the gas flow pipe and the gas outlet of the flow valve are both located in the same front compartment.

[0012] A further aspect of the present invention is as follows: a rectangular channel is provided on the outer ring channel, a connecting plate is slidably provided in the rectangular channel, an arc-shaped sealing plate is fixedly connected to one side of the connecting plate, and an arc-shaped plate is fixedly connected to the other side of the connecting plate. The length of the arc-shaped sealing plate is greater than the length of the rectangular channel, so that when the arc-shaped sealing plate moves left and right, the rectangular channel is in a sealed state. The arc-shaped sealing plate seals the outlet of the flow valve and the gas pipeline. A telescopic rod is rotatably connected between the bottom of the outer ring channel and the bottom of the arc-shaped plate through a bearing. A swing motor is fixedly installed at the bottom of the outer ring channel, and the output end of the swing motor is fixedly connected to the telescopic rod.

[0013] A further aspect of the present invention is that: a connecting channel is provided within the outer ring channel, the connecting channel being located between two adjacent front chambers, so that when the inert gas generator introduces inert gas into one of the front chambers, inert gas is also introduced into the adjacent front chamber through the connecting channel; a channel opening is provided on the outer ring channel, and a sealing baffle is slidably provided within the channel opening, the sealing baffle sealing one end of the connecting channel; a driving cylinder is fixedly installed on the outer ring channel, and the output end of the driving cylinder is fixedly connected to one end of the sealing baffle.

[0014] Secondly, this application provides a sampling and detection method for a multi-channel gas sampling and detection integrated machine in the workplace, which is applied to the aforementioned multi-channel gas sampling and detection integrated machine in the workplace. The sampling and detection method for the multi-channel gas sampling and detection integrated machine in the workplace includes the following steps: Install sampling bottles: Install multiple sampling bottles containing different adsorbents at the bottom of the gas sampler by moving the assembly. Install the pre-pipeline at the inlet end of the sampling bottle and align one end of the pre-pipeline with the outlet assembly. Then combine the pre-pipeline with the outlet assembly. The gas collection chamber is treated by introducing inert gas into it through auxiliary components to expel excess air from the chamber. A fixed amount of air is collected and introduced into the air collection chamber through the air intake component. A fixed amount of air is introduced into the sampling bottle. The negative pressure generated by the gas sampler absorbs the air in the gas collection chamber. At the same time, the auxiliary components accelerate the flow of the air in the gas collection chamber into the forward pipeline. Under the premise that the gas sampling speed and time remain unchanged, the fixed amount of air in the gas collection chamber is completely extracted.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) Excess air in the gas collection chamber is discharged through the auxiliary component, and then a certain amount of air is introduced into the gas collection chamber through the air inlet component. In order to remove particulate impurities such as dust from the air from entering the sampling bottle, a corresponding filter element is set in the air outlet component to filter the air. Due to the influence of particulate impurities, the filter element becomes clogged, which reduces the speed at which the air flows into the sampling bottle. Since the gas sampling machine extracts gas at a fixed speed and time, it cannot completely extract the certain amount of air in the gas collection chamber when the air flow speed into the sampling bottle decreases. Therefore, inert gas is introduced into the gas collection chamber through the auxiliary component. The addition of inert gas increases the pressure in the gas collection chamber, thereby accelerating the flow of air into the outlet components and the pre-exhaust pipe. This allows the gas sampler to completely sample a fixed amount of air within a fixed time and at a fixed air extraction speed. Furthermore, the inert gas entering the sampling bottle will not react with the adsorbent inside. This solves the problem that, under the premise of constant gas extraction speed and time, a clogged filter would reduce the airflow speed into the sampling tube, resulting in a smaller amount of air entering the sampling tube and thus causing deviations in gas detection results.

[0016] (2) Before air is introduced into the gas collection chamber through the flow valve, a certain amount of air will remain in each gas collection chamber, and the amount of air is different for each chamber. Since the air introduced through the flow valve is a fixed amount of air required for sampling, when the fixed amount of air is introduced through the flow valve, it will combine with the air remaining in the gas collection chamber, which will increase the amount of air required for sampling. This will result in different air content introduced into each sampling bottle, which will affect the detection results. By setting an inert gas generator, inert gas is introduced into the gas collection chamber before the air is introduced into the gas collection chamber through the flow valve to discharge the excess air in the gas collection chamber. Then, a fixed amount of air is introduced into the gas collection chamber through the air inlet assembly. When the first sampling bottle has finished collecting the sample... After completion, the air sampler rotates the inner ring channel, causing the new rear chamber to connect with the front chamber connected to the flow valve. The new rear chamber also contains residual air. Therefore, after the first sampling bottle is collected, the inert gas generator continuously introduces inert gas into the gas collection chamber. At the same time, the drive cylinder moves the sealing baffle, opening the connecting channel and allowing inert gas to be introduced into the adjacent front chamber. This discharges the gas in the adjacent front and rear chambers, ensuring that no excess air remains in the newly combined gas collection chamber. This solves the problem that residual air in the gas collection chamber increases the amount of air required for sampling, leading to inconsistent air content in each sampling bottle and affecting the test results. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the gas sampler and sampling bottle structure of the present invention; Figure 3 This is a schematic diagram of the mobile component structure of the present invention; Figure 4 This is a schematic diagram of the pre-pipe, air intake assembly, and air outlet assembly of the present invention. Figure 5 For the present invention Figure 4 Schematic diagram of the structure of section A; Figure 6 For the present invention Figure 4 Schematic diagram of section B in the middle; Figure 7 This is a schematic diagram of the auxiliary component structure of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the C-section structure; Figure 9 This is a schematic diagram of the arc-shaped plate structure in the auxiliary component of the present invention; Figure 10 For the present invention Figure 9 Schematic diagram of the middle D section structure; Figure 11 This is a cross-sectional view of the rotating plate and the supporting plate structure of the present invention.

[0018] In the diagram: 100, Gas sampler; 101, Rotating plate; 102, Support plate; 103, Servo motor; 200, Sampling bottle; 201, Pre-pipeline; 202, Inner connecting pipe; 203, Movable sealing plate; 204, Angle plate; 205, Compression spring; 206, Magnetic block; 300, Outer ring channel; 400, Inner ring channel; 500, Inlet assembly; 501, Air pump; 502, Connecting pipe; 503, Valve; 504, Handle; 505, Filter chamber; 506, Filter screen; 507, Flow valve; 600, Outlet assembly; 601, Outlet pipe; 602, Filter element; 60 3. External connecting pipe; 604. Metal sealing plate; 605. Sealing ring; 606. Right angle plate; 607. Return spring; 700. Auxiliary components; 701. Inert gas generator; 702. Gas pipeline; 703. Rectangular channel; 704. Connecting plate; 705. Arc-shaped sealing plate; 706. Arc-shaped plate; 707. Telescopic rod; 708. Swing motor; 709. Connecting channel; 710. Sealing baffle; 711. Drive cylinder; 800. Moving component; 801. Servo cylinder; 802. Mounting bracket; 803. Clamping plate; 900. Gas collection chamber; 901. Front chamber; 902. Rear chamber. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0020] Example 1

[0021] like Figure 1 , Figure 2 and Figure 7 As shown, the multi-channel gas sampling and detection integrated machine for the workplace provided in this embodiment of the invention includes a gas sampler 100, sampling bottles 200 are installed around the gas sampler 100, and an outer ring channel 300, an inner ring channel 400, an air inlet component 500, an air outlet component 600 and an auxiliary component 700 are provided outside the gas sampler 100. A movable component 800 is installed at the bottom of the gas sampler 100, which drives the sampling bottle 200 to move back and forth. The sampling bottle 200 has a pre-connected pipe 201 fitted to its air inlet end; The inner ring channel 400 is slidably disposed at the inner ring of the outer ring channel 300, and multiple interconnected gas collection chambers 900 are formed between the inner ring channel 400 and the outer ring channel 300. The air intake assembly 500 is installed on the outer ring channel 300 and introduces a fixed amount of air into the air collection chamber 900; The air outlet assembly 600 is installed on the inner ring channel 400, and introduces the air in the air collection chamber 900 into the sampling bottle 200 through the pre-pipe 201; The auxiliary component 700 is installed on the outer ring channel 300. The auxiliary component 700 introduces inert gas into the gas collection chamber 900, which in turn drives the air in the gas collection chamber 900 into the sampling bottle 200.

[0022] The working principle of the multi-channel gas sampling and detection integrated machine in the above-mentioned workplace is as follows: The sampling bottle 200 is installed on the gas sampler 100 via the moving component 800. Then, the pre-connecting pipe 201 is installed on the air inlet port of the sampling bottle 200, aligning the air inlet end of the pre-connecting pipe 201 with the air outlet component 600. Then, inert gas is introduced into the gas collection chamber 900 through the auxiliary component 700 to expel the air from the gas collection chamber 900. Afterward, the auxiliary component 700 stops working, and air is introduced into the gas collection chamber 900 through the air inlet component 500. A fixed amount of air is discharged into the gas collection chamber 900. After the air intake component 500 stops working, the negative pressure generated by the gas sampler 100 causes the air in the gas collection chamber 900 to flow into the sampling bottle 200. At the same time, the auxiliary component 700 operates to introduce inert gas into the gas collection chamber 900, which accelerates the flow speed of the air in the gas collection chamber 900 into the forward pipe 201. This allows the gas sampler 100 to completely extract and sample the fixed amount of air in the gas collection chamber 900 within a fixed time and at a fixed air extraction speed.

[0023] Traditional air sampling, due to the blockage of filter element 602, will reduce the speed at which air flows into the sampling tube. Under the premise that the speed and time of gas extraction by the vacuum pump remain unchanged, the reduced speed of air flow into the sampling tube will easily lead to a decrease in the amount of air entering the sampling tube, thus causing deviations in the gas detection results. In contrast, this application introduces a fixed amount of air into the gas collection chamber 900 through the air intake component 500. When the filter element 602 becomes clogged, causing a decrease in the flow rate of air from the collection chamber into the sampling bottle 200, inert gas is introduced into the gas collection chamber 900 through the auxiliary component 700. The addition of inert gas increases the pressure within the gas collection chamber 900, thereby accelerating the flow rate of air into the air outlet component 600 and the pre-pipeline 201. This allows the gas sampler 100 to completely extract and sample a fixed amount of air within a fixed time and at a fixed air extraction speed. Simultaneously, the inert gas entering the sampling bottle 200 will not react with the adsorbent within the sampling bottle 200. This solves the problem that, under the premise that the gas extraction speed and time of the gas sampler 100 remain unchanged, a clogged filter element 602 reduces the flow rate of air into the sampling tube, resulting in a decrease in the amount of air entering the sampling tube and thus causing deviations in the gas detection results.

[0024] See also Figure 3 As shown, to control the combination and separation between the pre-pipeline 201 at the front end of the sampling bottle and the gas outlet assembly 600, the moving assembly 800 includes a servo cylinder 801. The sampling bottle 200 is mounted around the gas sampler 100 via a mounting bracket 802. A pair of clamping plates 803 are fixedly connected around the gas sampler 100. The mounting bracket 802 is slidably mounted between the two clamping plates 803. The servo cylinder 801 is fixedly mounted on the gas sampling bottle 200. The servo cylinder 801 is located at the bottom of the mounting bracket 802, and its output end is fixedly connected to the mounting bracket 802. The mounting bracket 802 is structured as a vertical plate with an annular plate fixedly mounted in the middle of one side, and a base mounted at the bottom. The inner ring of the annular plate has two flat sides. The outer two sides of the sampling bottle 200 are set as flat surfaces. When the sampling bottle 200 is placed into the mounting frame 802, the air inlet end of the sampling bottle 200 faces outward, and the flat surfaces on both sides of the sampling bottle 200 are in contact with the flat surfaces on both sides of the inner ring of the annular plate. This makes the air inlet end of the sampling bottle 200 aligned with the air outlet assembly 600 when the sampling bottle 200 is placed, thereby achieving the effect of positioning the sampling bottle 200. At the same time, the vertical plate has inner grooves on both sides, and the clamping plates 803 at both ends of the sampling machine are set in the inner grooves. When the servo cylinder 801 drives the mounting frame 802 to move, the mounting frame 802 moves on the clamping plates 803, thereby controlling the movement of the mounting frame 802 and the sampling bottle 200, which facilitates the combination and disassembly between the pre-pipe 201 and the air outlet assembly 600.

[0025] See also Figure 7 and Figure 11As shown, in order to control the simultaneous rotation of the gas sampler 100 and the inner loop channel 400, and to switch between different sampling bottles 200 for air collection, a rotating plate 101 is fixedly connected to the bottom of the gas sampler 100. A support plate 102 is provided at the bottom of the rotating plate 101 and is rotatably connected to the support plate 102 via bearings. A servo motor 103 is fixedly connected to the bottom of the support plate 102, and the output end of the servo motor 103 is fixedly connected to the rotating plate 101. The inner loop channel 400 is fixedly connected to the rotating plate 101 via a connecting rod. The gas collection chamber 900 includes a front chamber 901 and a rear chamber 902. The front chamber 901 is located within the outer loop channel 300, and the rear chamber 902 is located within the inner loop channel 400. When the first sampling bottle 200 is installed, the port of the front pipe 201 of the first sampling bottle 200 is aligned with the corresponding gas outlet component 600, simultaneously aligning the gas outlet component 600 with... The air intake components 500 are connected. At this time, the rear chamber 902 of the inner ring channel 400 overlaps and is connected with the front chamber 901 of the outer ring channel 300. Through the cooperation of the air intake components 500 and the air outlet components 600, a certain amount of air is introduced into the sampling bottle 200 for sampling. After the air sampling in the first gas collection chamber 900 is completed, the servo motor 103 drives the rotating plate 101 to rotate, thereby driving the gas sampler 100 and the inner ring channel 400 to rotate. This makes the second rear chamber 902 adjacent in the inner ring channel 400 connected with the first front chamber 901 to form a new gas collection chamber 900. At the same time, the second sampling bottle 200 and the air outlet components 600 are connected with the air intake components 500 to realize a new round of quantitative air collection. This achieves the effect of collecting the same amount of air with different adsorbents, and then detecting the content of various gas components in the air. See also Figures 4 to 6 As shown, to ensure an equal volume of air enters the air collection chamber 900, the air intake assembly 500 includes an air pump 501. The air pump 501 is fixedly mounted on the support plate 102 via a mounting platform. A connecting pipe 502 is sleeved at the air outlet end of the air pump 501. A valve 503 is rotatably connected to the connecting pipe 502 via a bearing. A handle 504 is fixedly connected to the connecting pipe 502 and is fixedly connected to the valve 503 via a coupling. An air filter chamber 505 is sleeved at one end of the connecting pipe 502. A filter screen 506 is fixedly connected inside the air filter chamber 505. A flow valve 507 is fixedly installed at one end of the air filter chamber 505. One end of the flow valve 507 is fixedly connected to the outer ring channel 300 and communicates with the front chamber 901. Air is introduced into the air filter chamber 505 by the air pump 501. The filter screen 506 in the air filter chamber 505 filters the particulate matter in the air. The flow valve 507 controls the specified amount of air to enter the air collection chamber 900, thereby achieving the effect of an equal amount of air entering the air collection chamber 900.

[0026] See also Figures 4 to 6As shown, to achieve the combination of the pre-exhaust pipe 201 and the air outlet assembly 600, both are in the open state during combination to allow air to enter the sampling bottle 200, and both are in the closed state during separation to prevent air loss, the air outlet assembly 600 includes an air outlet pipe 601. The air outlet pipe 601 is fixedly installed on the inner ring channel 400 and communicates with the rear chamber 902. A filter element 602 is fixedly installed inside the air outlet pipe 601. An outer connecting pipe 603 is fixedly installed on the inner wall of the air outlet pipe 601 near the port. Sliding grooves are opened on both sides of the inner wall of the outer connecting pipe 603. A metal sealing plate 604 is slidably installed inside the outer connecting pipe 603. The outer periphery of the metal sealing plate 604 is attached to the inner wall of the outer connecting pipe 603 through a sealing ring 605. Right-angle plates 606 are fixedly connected to both ends of the metal sealing plate 604 on the side away from the air outlet pipe 601. The right-angle plate 606 is slidably mounted in the slide groove. Return springs 607 are fixedly connected to both sides of the right-angle plate 606 and are fitted inside the slide groove. An inner connecting pipe 202 is fixedly connected to one end of the pre-positioned pipe 201. The diameter of the inner connecting pipe 202 is larger than the diameter of the pre-positioned pipe 201. The inner connecting pipe 202 is fitted inside the outer connecting pipe 603. Sliding grooves are provided on both sides of the inner wall of the pre-positioned pipe 201. A movable sealing plate 203 is slidably mounted inside the pre-positioned pipe 201. An angled plate 204 is fixedly connected to both sides of the movable sealing plate 203 away from the inner connecting pipe 202. The angled plate 204 is slidably mounted in the slide groove. A compression spring 205 is fixedly connected to the side of the angled plate 204 closest to the inner connecting pipe 202. The compression spring 205 is located in the slide groove. A magnetic block 206 is fixedly installed on one side of the movable sealing plate 203, and the magnetic block 206 is magnetically connected to the metal sealing plate 604. When the moving component 800 moves the sampling bottle 200 and the pre-connecting pipe 201 toward the outlet pipe 601, the inner connecting pipe 202 at one end of the pre-connecting pipe 201 first enters the outer connecting pipe 603 of the outlet pipe 601, and the inner walls of the two are in contact. When one end of the inner connecting pipe 202 contacts the right-angle plate 606 inside the outer connecting pipe 603, the magnetic attraction between the magnetic block 206 and the metal sealing plate 604 drives the movable sealing plate 203 to move forward. Since the diameter of the inner connecting pipe 202 is larger than the diameter of the pre-connecting pipe 201, when the movable sealing plate 203 moves forward, it enters the inner connecting pipe 202, thereby freeing the pre-connecting pipe 201 from the seal of the movable sealing plate 203. At the same time, as the pre-connecting pipe 201 continues to move forward, the inner connecting pipe 202 drives the right-angle plate 606. The metal sealing plate 604 moves forward, and the diameter of the outer connecting pipe 603 is smaller than the diameter of the outlet pipe 601. This allows the metal sealing plate 604 to enter the outlet pipe 601 as it moves forward, thus freeing the outlet pipe 601 from being closed by the metal sealing plate 604. Consequently, when the pre-pipe 201 and the outlet pipe 601 are combined, they are both in a connected state, facilitating the flow of air from the gas collection chamber 900 to the sampling bottle 200. A filter element 602 is installed inside the outlet pipe 601. The filter element 602 is a glass fiber filter element 602, which uses ultra-fine glass fiber as the filter medium. The filtration accuracy can reach 0.3µm or even higher, and it can efficiently intercept PM2.5, dust, smoke particles, etc. The filter element 602 intercepts and filters the particles remaining in the air, while the filtered particles will cause blockage of the filter element 602.

[0027] See also Figures 7 to 10As shown, to prevent the airflow speed in the gas collection chamber 900 to the forward pipeline 201 from decreasing due to filter element 602 blockage, thus preventing the sampling bottle 200 from collecting an equal amount of air, the auxiliary component 700 includes an inert gas generator 701. The inert gas generator 701 is fixedly mounted on the support plate 102 via a fixing platform. A gas flow pipe 702 is fixedly installed at the output end of the inert gas generator 701. The gas flow pipe 702 is fixedly installed on the outer ring channel 300 and communicates with the front chamber 901. The gas flow pipe 702 and the outlet end of the flow valve 507 are both located in the same front chamber 901. When the filter element 602 in the outlet pipeline 601 becomes blocked due to prolonged operation, the airflow speed in the gas collection chamber 900 to the forward pipeline 201 will decrease. Simultaneously, because the air sampler is programmed to extract air at a fixed speed and time, when the airflow speed in the gas collection chamber 900 to the forward pipeline 201 decreases, the air sampler's extraction speed and time will remain constant. Under unchanged conditions, it is difficult to completely extract the air from the gas collection chamber 900. Therefore, by installing an inert gas generator 701 on the gas collection chamber 900, inert gas is introduced into the gas collection chamber 900 through the inert gas generator 701. When the inert gas enters the gas collection chamber 900, the pressure inside the gas collection chamber 900 increases, thereby accelerating the flow speed of the air in the gas collection chamber 900 into the forward pipe 201. This allows the air sampler to completely extract a fixed amount of air while keeping the gas extraction speed and time of the gas sampler 100 constant. At the same time, the inert gas entering the sampling bottle 200 will not react with the adsorbent in the sampling bottle 200. Simultaneously, as the inert gas is discharged, the air in the gas collection chamber 900 is discharged, thus allowing the air sampler to completely absorb the air in the gas collection chamber 900. This application does not limit the specific structure of the inert gas generator 701. The specific structure and working principle of the inert gas generator 701 are existing technologies and will not be described in detail here.

[0028] Example 2

[0029] like Figures 7 to 10As shown, to prevent air from flowing into the gas duct 702 when air enters the gas collection chamber 900, a rectangular channel 703 is provided on the outer ring channel 300. A connecting plate 704 is slidably installed inside the rectangular channel 703. An arc-shaped sealing plate 705 is fixedly connected to one side of the connecting plate 704, and an arc-shaped plate 706 is fixedly connected to the other side of the connecting plate 704. The length of the arc-shaped sealing plate 705 is greater than the length of the rectangular channel 703, so that when the arc-shaped sealing plate 705 moves left and right, the rectangular channel 703 is in a sealed state. The arc-shaped sealing plate 705 seals the outlet of the flow valve 507 and the gas duct 702. The bottom of the outer ring channel 300 and the bottom of the arc-shaped plate 706 are rotatably connected by a bearing. The telescopic rod 707 has a swing motor 708 fixedly installed at the bottom of the outer ring channel 300, and the output end of the swing motor 708 is fixedly connected to the telescopic rod 707. When the flow valve 507 transports a fixed amount of air into the gas collection chamber 900, the air will flow into the flow pipe 702 because the flow pipe 702 is connected to the gas collection chamber 900. If, in order to prevent air from entering the flow pipe 702, the inert gas generator 701 simultaneously introduces inert gas into the gas collection chamber 900 when the flow valve 507 is running, it is easy for the gas collection chamber 900 to be quickly filled with gas, which will cause the air to flow back into the solenoid valve, thereby reducing the amount of air in the gas collection chamber 900. Therefore, an arc-shaped sealing plate is installed on the inner wall of the front chamber 901. 705, and the length of the arc-shaped sealing plate 705 can seal the rectangular channel 703 on the outer ring channel 300. Simultaneously, when the arc-shaped sealing plate 705 moves to both sides to seal the outlet of the flow valve 507 and the outlet of the gas pipeline 702, the arc-shaped sealing plate 705 seals the rectangular channel 703 on the outer ring channel 300, preventing air in the gas collection chamber 900 from flowing outward through the rectangular channel 703. When the flow valve 507 drives the air to flow into the collection chamber, the swing motor 708 drives the telescopic rod 707 to rotate to one side, thereby driving the arc-shaped plate 706 to rotate towards the gas pipeline 702, and simultaneously driving the arc-shaped sealing plate 705 to rotate towards the outlet of the gas pipeline 702, thus sealing the gas pipeline 702. The outlet of 02 is sealed to prevent air in the gas collection chamber 900 from flowing into the gas supply pipe 702. When the flow valve 507 introduces a certain amount of air into the gas collection chamber 900, the swing motor 708 drives the telescopic plate to rotate to the other side, causing the arc-shaped sealing plate 705 to rotate towards the outlet of the flow valve 507. This causes the arc-shaped sealing plate 705 to open the outlet of the gas supply pipe 702 and seal the outlet of the flow valve 507 in the gas collection chamber 900. This ensures that when air is supplied to the gas collection chamber 900, the air will not flow out through the gas supply pipe 702. At the same time, when the air in the gas collection chamber 900 flows into the sampling bottle 200, the introduction of inert gas will not cause the air to flow back to the flow valve 507.

[0030] See also Figures 7 to 10As shown, to prevent air remaining in the inner chamber from mixing with the gas introduced through the flow valve 507 when the next inner chamber rotates to the outer chamber with the flow valve 507, thus increasing the amount of air in the gas collection chamber 900 and causing the remaining air content in each individual gas collection chamber 900 to vary, which could lead to inconsistent air content during each sampling, a connecting channel 709 is provided in the outer ring channel 300. The connecting channel 709 is located between two adjacent front chambers 901, so that when the inert gas generator 701 introduces inert gas into one of the front chambers 901, the connecting channel... Inert gas is introduced into the adjacent front chamber 901 through channel 709. An opening is provided on the outer ring channel 300, and a sealing baffle 710 is slidably installed inside the opening, sealing one end of the connecting channel 709. A drive cylinder 711 is fixedly installed on the outer ring channel 300, and the output end of the drive cylinder 711 is fixedly connected to one end of the sealing baffle 710. When the air intake assembly 500 introduces air into the first gas collection chamber 900, to prevent air from flowing from the connecting channel 709 into the second gas collection chamber 900, the sealing baffle 710 closes the connecting channel 709 to the first... One end of the gas collection chamber 900 is sealed. After all the air in the first gas collection chamber 900 is introduced into the sampling bottle 200, the driving cylinder 711 drives the sealing baffle 710 to move outward, opening the connecting channel 709 and introducing inert gas into the second gas collection chamber 900. When sufficient inert gas is introduced into the second gas collection chamber 900, the gas pressure inside the second gas collection chamber 900 increases. When the gas pressure inside the second gas collection chamber 900 exceeds the elastic force of the return spring 607 and the friction between the outer sealing ring 605 of the metal sealing plate 604 and the inner wall of the outer connecting pipe 603, the metal sealing... The sealing plate 604 moves outward, and an opening is provided on the outer connecting pipe 603. When the metal sealing plate 604 moves to the opening, the inert gas discharges air outward through the opening until all the air in the second gas collection chamber 900 is discharged. Then, no more inert gas is introduced into the second gas collection chamber 900. When no more gas is introduced into the second gas collection chamber 900, as the inert gas flows outward through the opening, the air pressure in the second gas collection chamber 900 decreases. The spring force provided by the return spring 607 causes the metal sealing plate 604 to return to its original position, thereby sealing the second gas collection chamber 900.

[0031] Example 3

[0032] The sampling and detection method of a multi-channel gas sampling and detection integrated machine in the workplace, and the specific steps of using a multi-channel gas sampling and detection integrated machine in the workplace are as follows: Install sampling bottles 200, and install multiple sampling bottles 200 containing different adsorbents at the bottom of the gas sampler 100 by moving component 800. Install the pre-pipeline 201 at the air inlet end of the sampling bottle 200, and align one end of the pre-pipeline 201 with the air outlet component 600. Then combine the pre-pipeline 201 with the air outlet component 600. The gas collection chamber 900 is processed by introducing inert gas into the gas collection chamber 900 through the auxiliary component 700, thereby expelling excess air from the gas collection chamber 900. A fixed amount of air is collected and introduced into the air collection chamber 900 through the air intake component 500. A fixed amount of air is introduced into the sampling bottle 200. The negative pressure generated by the gas sampler 100 absorbs the air in the gas collection chamber 900. At the same time, the auxiliary component 700 accelerates the flow of the air in the gas collection chamber 900 into the forward pipe 201. Under the premise that the gas sampling speed and time of the gas sampler 100 remain unchanged, the fixed amount of air in the gas collection chamber 900 is completely extracted.

[0033] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A multi-channel gas sampling and detection integrated machine for the workplace, characterized in that, The system includes a gas sampler, which is equipped with sampling bottles on all four sides. The gas sampler is also equipped with an outer ring channel, an inner ring channel, an inlet component, an outlet component, and auxiliary components. The gas sampler is equipped with a moving component at the bottom, which moves the sampling bottle back and forth. The sampling bottle is fitted with a pre-connected pipe at the air inlet end; The inner ring channel is slidably disposed at the inner ring of the outer ring channel, and multiple interconnected gas collection chambers are formed between the inner ring channel and the outer ring channel; The air intake assembly is installed on the outer ring channel to introduce a fixed amount of air into the air collection chamber; The air outlet component is installed on the inner ring channel, and the air in the air collection chamber is introduced into the sampling bottle through the pre-pipe; The auxiliary component is installed on the outer ring channel. The auxiliary component introduces inert gas into the gas collection chamber, which in turn drives the air in the gas collection chamber into the sampling bottle.

2. The multi-channel gas sampling and detection integrated machine for the workplace according to claim 1, characterized in that, The moving component includes a servo cylinder. The sampling bottle is mounted around the gas sampler via a mounting bracket. A pair of clamps are fixedly connected around the gas sampler. The mounting bracket is slidably mounted between the two clamps. The servo cylinder is fixedly mounted on the gas sampling bottle. The servo cylinder is located at the bottom of the mounting bracket and its output end is fixedly connected to the mounting bracket.

3. The multi-channel gas sampling and detection integrated machine for the workplace according to claim 2, characterized in that, The gas sampler is fixedly connected to a rotating plate at its bottom. The rotating plate has a support plate at its bottom and is rotatably connected to the support plate via a bearing. A servo motor is fixedly connected to the bottom of the support plate. The output end of the servo motor is fixedly connected to the rotating plate. The inner ring channel is fixedly connected to the rotating plate via a connecting rod. The gas collection chamber includes a front chamber and a rear chamber, with the front chamber located within the outer ring channel and the rear chamber located within the inner ring channel.

4. The workplace multi-channel gas sampling and detection integrated machine according to claim 3, characterized in that, The air intake assembly includes an air pump, which is fixedly mounted on a support plate via a mounting platform. A connecting pipe is sleeved at the air outlet end of the air pump. A valve is rotatably connected to the connecting pipe via a bearing. A handle is fixedly connected to the connecting pipe and is fixedly connected to the valve via a coupling. A filter chamber is sleeved at one end of the connecting pipe. A filter screen is fixedly connected to the filter chamber. A flow valve is fixedly installed at one end of the filter chamber. One end of the flow valve is fixedly connected to the outer ring channel and communicates with the front compartment.

5. The multi-channel gas sampling and detection integrated machine for the workplace according to claim 4, characterized in that, The air outlet assembly includes an air outlet pipe, which is fixedly installed on the inner ring channel and communicates with the rear compartment. A filter element is fixedly installed inside the air outlet pipe. An outer connecting pipe is fixedly installed on the inner wall of the air outlet pipe near the port. Sliding grooves are formed on both sides of the inner wall of the outer connecting pipe. A metal sealing plate is slidably installed inside the outer connecting pipe. The outer periphery of the metal sealing plate is fitted to the inner wall of the outer connecting pipe through a sealing ring. Right-angle plates are fixedly connected to both ends of the metal sealing plate on the side away from the air outlet pipe. The right-angle plates are slidably disposed in the sliding grooves. Return springs are fixedly connected to both sides of the right-angle plates. The return springs are sleeved in the sliding grooves.

6. The integrated multi-channel gas sampling and detection machine for the workplace according to claim 5, characterized in that, One end of the pre-connector is fixedly connected to an inner connecting pipe. The diameter of the inner connecting pipe is larger than that of the pre-connector. The inner connecting pipe is fitted inside the outer connecting pipe. Sliding grooves are provided on both sides of the inner wall of the pre-connector. A movable sealing plate is slidably installed inside the pre-connector. Angle plates are fixedly connected to both sides of the movable sealing plate away from the inner connecting pipe. The angle plates are slidably installed in the sliding grooves. A compression spring is fixedly connected to the side of the angle plate near the inner connecting pipe. The compression spring is located in the sliding grooves. A magnetic block is fixedly installed on one side of the movable sealing plate. The magnetic block is magnetically connected to the metal sealing plate.

7. The multi-channel gas sampling and detection integrated machine for the workplace according to claim 6, characterized in that, The auxiliary component includes an inert gas generator, which is fixedly mounted on the support plate via a fixed platform. A gas flow pipe is fixedly installed at the output end of the inert gas generator. The gas flow pipe is fixedly installed on the outer ring channel and communicates with the front compartment. The gas flow pipe and the outlet end of the flow valve are both located in the same front compartment.

8. The multi-channel gas sampling and detection integrated machine for the workplace according to claim 7, characterized in that, A rectangular channel is provided on the outer ring channel, and a connecting plate is slidably arranged inside the rectangular channel. An arc-shaped sealing plate is fixedly connected to one side of the connecting plate, and an arc-shaped plate is fixedly connected to the other side of the connecting plate. The length of the arc-shaped sealing plate is greater than the length of the rectangular channel, so that the rectangular channel is in a sealed state when the arc-shaped sealing plate moves left and right. The arc-shaped sealing plate seals the outlet of the flow valve and the gas pipeline. A telescopic rod is rotatably connected between the bottom of the outer ring channel and the bottom of the arc-shaped plate through a bearing. A swing motor is fixedly installed at the bottom of the outer ring channel, and the output end of the swing motor is fixedly connected to the telescopic rod.

9. The multi-channel gas sampling and detection integrated machine for the workplace according to claim 8, characterized in that, A connecting channel is provided within the outer ring channel, located between two adjacent front chambers. This allows inert gas to be introduced into the adjacent front chamber via the connecting channel when the inert gas generator introduces inert gas into one of the front chambers. An opening is provided on the outer ring channel, and a sealing baffle is slidably installed within the opening to seal one end of the connecting channel. A drive cylinder is fixedly installed on the outer ring channel, and the output end of the drive cylinder is fixedly connected to one end of the sealing baffle.

10. A sampling and detection method for a multi-channel gas sampling and detection integrated machine in the workplace, characterized in that: The specific steps for using the multi-channel gas sampling and detection integrated machine for the workplace as described in any one of claims 1-9 are as follows: Install sampling bottles: Install multiple sampling bottles containing different adsorbents at the bottom of the gas sampler by moving the assembly. Install the pre-pipeline at the inlet end of the sampling bottle and align one end of the pre-pipeline with the outlet assembly. Then combine the pre-pipeline with the outlet assembly. The gas collection chamber is treated by introducing inert gas into it through auxiliary components to expel excess air from the chamber. A fixed amount of air is collected and introduced into the air collection chamber through the air intake component. A fixed amount of air is introduced into the sampling bottle. The negative pressure generated by the gas sampler absorbs the air in the gas collection chamber. At the same time, the auxiliary components accelerate the flow of the air in the gas collection chamber into the forward pipeline. Under the premise that the gas sampling speed and time remain unchanged, the fixed amount of air in the gas collection chamber is completely extracted.

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