Air sampling device for indoor environment quality detection

Abstract

The utility model belongs to the technical field of air sampling, and relates to an air sampling device for indoor environment quality detection, which comprises a bubble absorption bottle body, a bubble absorption bottle inner pipe, an anti-suck-back valve, a T-shaped three-way pipe and a T-shaped pipe, the anti-suck-back valve is composed of a sleeve and an elastic membrane installed in the sleeve, and the bottom end of the sleeve is connected with the air inlet; the left end of the T-shaped three-way pipe is connected with the end part of the extraction opening, and the bottom end of the T-shaped three-way pipe is provided with a plug for plugging the end opening; the T-shaped pipe is installed in the T-shaped three-way pipe in a penetrating mode and used for blocking an internal flow channel of the T-shaped three-way pipe, or the T-shaped pipe is installed in the sleeve in a penetrating mode, used for opening the elastic membrane and communicated with the air inlet. The sampling device can be used for collecting pollutants in the air by a solution absorption method, can avoid wrong pipeline connection, can smoothly collect the pollutants in the air, and can prevent the absorption liquid from being sucked back into an atmosphere sampling instrument due to misoperation.

Description

Technical Field

[0001] The utility model belongs to the technical field of air sampling, in particular to an air sampling device for indoor environmental quality detection. Background Art

[0002] Indoor environmental quality testing includes formaldehyde, benzene, toluene and other testing items. The bubble absorption bottle, also known as the bubble absorption tube, is a glass sampling container used to collect pollutants in the air by the solution absorption method. It is used in conjunction with an atmospheric sampler.

[0003] During the use of the existing bubble absorption bottle, due to the operator's operating error, the absorption liquid in the bubble absorption bottle is easily pumped into the atmosphere sampler, resulting in sampling failure or even damage to the atmosphere sampler. Utility Model Content

[0004] The utility model aims to provide an air sampling device for indoor environmental quality detection, which solves the problem that absorption liquid is easily sucked back into an atmospheric sampler due to operating errors.

[0005] The utility model is realized by the following technical solutions:

[0006] An air sampling device for indoor environmental quality detection comprises a bubble absorption bottle body and a bubble absorption bottle inner tube; the top of the bubble absorption bottle inner tube is an air inlet and protrudes outside the bottle mouth of the bubble absorption bottle body, and a gas extraction port is arranged near the bottle mouth of the bubble absorption bottle body on the side wall of the bubble absorption bottle body;

[0007] The anti-back-inhalation valve comprises a sleeve and an elastic diaphragm installed inside the sleeve, and the bottom end of the sleeve is connected to the air inlet;

[0008] It comprises a T-shaped three-way pipe, the left end of which is connected to the end of the air extraction port, and the bottom end of the T-shaped three-way pipe is provided with a plug for blocking the port;

[0009] It also includes a T-tube, which is installed in the T-shaped three-way pipe to block the internal flow channel of the T-shaped three-way pipe, or installed in the sleeve to open the elastic diaphragm and communicate with the air inlet;

[0010] The sampling device can be used to collect pollutants in the air by the solution absorption method. The T-tube is installed in the T-type three-way pipe or in the casing. When the T-tube is installed in the T-type three-way pipe, the internal flow channel of the T-type three-way pipe is blocked, and the internal flow channel of the casing is blocked by an elastic diaphragm. Even if the casing at the air inlet is connected to the atmospheric sampler through the suction hose, it can prevent the absorption liquid in the bubble absorption bottle from being drawn into the atmospheric sampler through the inner tube of the bubble absorption bottle, the air inlet, and the suction hose. The T-tube is installed in the T-type three-way pipe. When inside the tube, the vacuum hose cannot be connected to the top of the T-tube. The vacuum hose connects the T-tube to the atmospheric sampler, which is the correct way to connect the pipes. When the atmospheric sampler is running, the indoor air enters the air inlet through the T-tube, and enters the bubble absorption bottle body through the inner tube of the bubble absorption bottle. The atmospheric sampler draws the air in the bubble absorption bottle body through the vacuum hose, T-tube and vacuum port, which can avoid wrong connection of the pipes, can smoothly collect pollutants in the air, and avoid the absorption liquid from being sucked back into the atmospheric sampler.

[0011] Further, the elastic diaphragm is in the shape of a circular sheet, which is made of an elastic rubber material or an elastic silicone material. The inner side wall of the top end of the sleeve is provided with an annular step, and the elastic diaphragm is fixedly mounted on the annular step surface. Specifically, the outer edge of the elastic diaphragm is bonded and fixed to the annular step surface, and a cross-shaped or cross-shaped through groove is provided on the elastic diaphragm with the central axis of the elastic diaphragm as the center. In addition, a through hole with a diameter not greater than 1 mm can also be provided at the center of the elastic diaphragm. The T-tube can open the through groove or through hole in the center of the elastic diaphragm. After the T-tube is pulled out, the elastic diaphragm can recover elastically and can be reused.

[0012] When the T-tube is installed in the sleeve, the bottom end of the T-tube squeezes the elastic diaphragm, and the T-tube passes through the center of the elastic diaphragm and stretches the elastic diaphragm to connect the air inlet with the T-tube. When collecting indoor air, the indoor air enters through the T-tube and then flows into the air inlet from the T-tube; when the T-tube is pulled out of the sleeve, the elastic diaphragm elastically recovers to close the internal flow channel of the sleeve. The combined structure of the sleeve and the elastic diaphragm is similar to the diaphragm sealing structure of the mouth of the infusion bottle or the mouth of the infusion bag; only when the T-tube is installed in the sleeve, can indoor air enter the bubble absorption bottle body through the air inlet. If the T-tube is installed in the T-type three-way pipe, the T-tube blocks the internal flow channel of the T-type three-way pipe. Even if the operator mistakenly connects the air inlet to the atmospheric sampler, the absorption liquid in the bubble absorption bottle body will not be drawn into the atmospheric sampler because the T-type three-way pipe connected to the exhaust port is blocked.

[0013] Furthermore, the bottom end of the sleeve is detachably connected to the air inlet, and the left end of the T-shaped three-way pipe is detachably connected to the end of the air exhaust port. The anti-backflow valve and the T-shaped three-way pipe can be installed on the existing bubble absorption bottle for use without destroying the original structure of the air inlet and the air exhaust port of the existing bubble absorption bottle. For example, when formaldehyde is detected by the solution absorption method, the anti-backflow valve and the T-shaped three-way pipe are added to the existing bubble absorption bottle. After the detection is completed, the anti-backflow valve and the T-shaped three-way pipe are removed, and the sampling device can also be used for other purposes.

[0014] Furthermore, the bottom end of the sleeve is detachably connected to the air inlet via a connecting hose, and the left end of the T-shaped three-way pipe is detachably connected to the end of the air exhaust port via a connecting hose, which can facilitate the disassembly and assembly of the sleeve and the T-shaped three-way pipe.

[0015] Furthermore, the plug is made of rubber material or silicone material, which is installed on the bottom end of the T-shaped tee and has an interference fit with the inner wall of the T-shaped tee. When the T-shaped tube is installed in the T-shaped tee, the plug can block the bottom port of the T-shaped tube.

[0016] Furthermore, the top surface of the plug is provided with a socket for the bottom end of the T-tube to pass through. When the T-tube is installed in the T-shaped three-way pipe, the bottom end of the T-tube passes through the socket of the plug, so that the plug can block the internal flow channel of the T-tube, thereby blocking the internal flow channel of the T-shaped three-way pipe.

[0017] Furthermore, the sleeve, T-shaped tee and T-shaped tube are all made of glass material; the T-shaped tube and the sleeve, as well as the T-shaped tube and the T-shaped tee can be connected by ground joints, thereby improving the stability of the T-shaped tube.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The sampling device can be used to collect pollutants in the air by the solution absorption method. The T-tube is installed in the T-type three-way pipe or in the casing. When the T-tube is installed in the T-type three-way pipe, the internal flow channel of the T-type three-way pipe is blocked, and the internal flow channel of the casing is blocked by an elastic diaphragm. Even if the casing at the air inlet is connected to the atmospheric sampler through the suction hose, it can prevent the absorption liquid in the bubble absorption bottle from being sucked into the atmospheric sampler through the inner tube of the bubble absorption bottle, the air inlet, and the suction hose, and can prevent the absorption liquid from being sucked back due to operating errors (connecting the suction hose to the casing). To the atmospheric sampler; when the T-tube is installed in the T-tube, the vacuum hose cannot be connected to the top of the T-tube. The vacuum hose connects the T-tube to the atmospheric sampler, which is the correct pipeline connection method. When the atmospheric sampler is running, the indoor air enters the air inlet through the T-tube, and enters the bubble absorption bottle body through the inner tube of the bubble absorption bottle. The atmospheric sampler draws the air in the bubble absorption bottle body through the vacuum hose, T-tube and vacuum port, which can avoid wrong pipeline connection, can smoothly collect pollutants in the air, and avoid the absorption liquid from being sucked back into the atmospheric sampler. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 for Figure 1 A schematic diagram of the enlarged local structure in the middle.

[0022] Figure 3 for Figure 2 Schematic diagram of the structure from above.

[0023] Figure 4 for Figure 1 Enlarged schematic diagram of the local structure at point B in the middle.

[0024] Figure 5 It is a structural schematic diagram of the utility model when it is used correctly.

[0025] Figure 6 for Figure 5 Enlarged schematic diagram of the local structure at point C in the middle.

[0026] The names of the components in the figure are: 1. Bubble absorption bottle body 2. Bubble absorption bottle inner tube 3. Air inlet 4. Anti-backflow valve 4.1. Sleeve 4.2. Elastic diaphragm 5. Air extraction port 6. T-type three-way pipe 7. T-type pipe 8. Connecting hose 9. Plug 10. Air extraction hose. DETAILED DESCRIPTION

[0027] The present invention is further described below through specific embodiments in conjunction with the accompanying drawings, but the present invention is not limited thereto. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0028] An air sampling device for indoor environmental quality detection, such as Figure 1 As shown, it includes a bubble absorption bottle body 1, a bubble absorption bottle inner tube 2, an anti-backflow valve 4, a T-shaped three-way pipe 6 and a T-shaped pipe 7;

[0029] like Figure 1 As shown, the bottom end of the bubble absorption bottle inner tube 2 is installed in the bottom of the bubble absorption bottle body 1, the top end of the bubble absorption bottle inner tube 2 is an air inlet 3 and protrudes out of the bottle mouth of the bubble absorption bottle body 1, the bubble absorption bottle inner tube 2 and the bottle mouth of the bubble absorption bottle body 1 are ground joint connected, and the side wall of the bubble absorption bottle body 1 is provided with an air extraction port 5 near the bottle mouth;

[0030] like Figures 1 to 3 As shown, the anti-backflow valve 4 is composed of a sleeve 4.1 and an elastic diaphragm 4.2 installed inside the sleeve 4.1;

[0031] like Figure 2 and Figure 4 As shown, the bottom end of the sleeve 4.1 is detachably connected to the air inlet 3 through a connecting hose 8, and the left end of the T-shaped three-way pipe 6 is detachably connected to the end of the air extraction port 5, which can facilitate the disassembly and assembly of the sleeve 4.1 and the T-shaped three-way pipe 6, and the anti-backflow valve 4 and the T-shaped three-way pipe 6 can be installed on the existing bubble absorption bottle for use without destroying the original structure of the air inlet 3 and the air extraction port 5 of the existing bubble absorption bottle; for example, when formaldehyde is detected by the solution absorption method, the anti-backflow valve 4 and the T-shaped three-way pipe 6 are installed on the existing bubble absorption bottle, and after the detection is completed, the anti-backflow valve 4 and the T-shaped three-way pipe 6 are disassembled, and the sampling device can also be used for other purposes;

[0032] The prior art designs the air inlet 3 into a special-shaped structure, so that the air extraction hose 10 cannot be connected thereto. Although it can prevent the air extraction hose 10 from being mistakenly connected to the air inlet 3 when the solution absorption method is used to collect pollutants in the air, the bubble absorption bottle with the special-shaped air inlet 3 is only suitable for collecting pollutants in the air by the solution absorption method, and cannot be used for other purposes where the air inlet 3 needs to be connected to an external pipeline.

[0033] Specifically, one end of the connecting hose 8 between the sleeve 4.1 and the air inlet 3 is sleeved on the bottom end of the sleeve 4.1, and the connecting hose 8 and the sleeve 4.1 are bonded and fixed. When the anti-backflow valve 4 is installed at the air inlet 3, the other end of the connecting hose 8 is sleeved on the air inlet 3.

[0034] One end of the connecting hose 8 between the T-shaped three-way pipe 6 and the air extraction port 5 is sleeved on the left end of the T-shaped three-way pipe 6, and the connecting hose 8 and the T-shaped three-way pipe 6 are bonded and fixed. When the T-shaped three-way pipe 6 is installed on the air extraction port 5, the other end of the connecting hose 8 is sleeved on the air extraction port 5;

[0035] like Figures 1 to 3 , Figure 5 and Figure 6 As shown, the elastic diaphragm 4.2 is in the shape of a circular sheet and is made of an elastic rubber material or an elastic silicone material. An annular step is provided on the inner side wall of the top end of the sleeve 4.1, and the elastic diaphragm 4.2 is fixedly mounted on the annular step surface. Specifically, the outer edge of the elastic diaphragm 4.2 is bonded and fixed to the annular step surface, and a cross-shaped or cross-shaped through groove is provided on the elastic diaphragm 4.2 with the central axis of the elastic diaphragm 4.2 as the center. In addition, a through hole with a diameter not greater than 1 mm can also be provided at the center of the elastic diaphragm 4.2. The T-tube 7 can open the through groove or through hole in the center of the elastic diaphragm 4.2. After the T-tube 7 is pulled out, the elastic diaphragm 4.2 can be elastically restored and can be reused.

[0036] like Figure 1 , Figures 4 to 6 As shown, a plug 9 for blocking the port is installed at the bottom end of the T-shaped three-way pipe 6; the T-shaped pipe 7 is installed in the T-shaped three-way pipe 6 to block the internal flow channel of the T-shaped three-way pipe 6, or is installed in the sleeve 4.1 to open the elastic diaphragm 4.2 and communicate with the air inlet 3;

[0037] When the T-tube 7 is inserted into the sleeve 4.1, the bottom end of the T-tube 7 squeezes the elastic diaphragm 4.2, and the T-tube 7 passes through the center of the elastic diaphragm 4.2 and stretches the elastic diaphragm 4.2, so that the air inlet 3 is connected with the T-tube 7. When collecting indoor air, the indoor air enters through the T-tube 7 and then flows into the air inlet 3 from the T-tube 7; when the T-tube 7 is pulled out of the sleeve 4.1, the elastic diaphragm 4.2 elastically recovers and closes the internal flow channel of the sleeve 4.1, and the combination of the sleeve 4.1 and the elastic diaphragm 4.2 The structure is similar to the diaphragm sealing structure of the mouth of an infusion bottle or an infusion bag; only when the T-tube 7 is installed in the sleeve 4.1, can the indoor air enter the air inlet 3 and enter the bubble absorption bottle body 1. If the T-tube 7 is installed in the T-shaped three-way pipe 6, the T-tube 7 blocks the internal flow channel of the T-shaped three-way pipe 6. Even if the operator mistakenly connects the air inlet 3 to the atmospheric sampler, the absorption liquid in the bubble absorption bottle body 1 will not be drawn into the atmospheric sampler because the T-shaped three-way pipe 6 connected to the exhaust port 5 is blocked.

[0038] As a preferred embodiment, in this embodiment, the plug 9 is made of rubber material or silicone material, which is installed on the bottom end of the T-shaped three-way pipe 6 and has an interference fit with the inner wall of the T-shaped three-way pipe 6. When the T-shaped tube 7 is installed in the T-shaped three-way pipe 6, the plug 9 can block the bottom port of the T-shaped tube 7; in addition, the plug 9 and the T-shaped three-way pipe 6 can also be bonded and fixed to improve the firmness of the plug 9.

[0039] As a preferred embodiment, in this embodiment, Figure 4As shown, the top surface of the plug 9 is provided with a hole for the bottom end of the T-tube 7 to pass through. When the T-tube 7 is installed in the T-shaped three-way pipe 6, the bottom end of the T-tube 7 passes through the hole of the plug 9, so that the plug 9 can block the internal flow channel of the T-tube 7, thereby blocking the internal flow channel of the T-shaped three-way pipe 6.

[0040] As a preferred implementation, in this embodiment, the sleeve 4.1, T-shaped three-way pipe 6 and T-shaped tube 7 are all made of glass material; the T-shaped tube 7 and the sleeve 4.1 as well as the T-shaped tube 7 and the T-shaped three-way pipe 6 can be connected by ground joints, thereby improving the stability of the T-shaped tube 7.

[0041] The working principle of this embodiment:

[0042] When the sampling device is used to collect pollutants in the air by the solution absorption method, the T-tube 7 is inserted into the T-tube 6 or into the sleeve 4.1;

[0043] When the T-tube 7 is installed in the T-tube 6, the internal flow channel of the T-tube 6 is blocked, and the internal flow channel of the sleeve 4.1 is blocked by the elastic diaphragm 4.2. Even if the sleeve 4.1 connected to the air inlet 3 is connected to the atmospheric sampler through the suction hose 10, it can prevent the absorption liquid in the bubble absorption bottle body 1 from being sucked into the atmospheric sampler through the bubble absorption bottle inner tube 2, the air inlet 3, and the suction hose 10;

[0044] When the T-tube 7 is installed in the T-shaped three-way pipe 6, the exhaust hose 10 cannot be connected to the top of the T-tube 7. The exhaust hose 10 connects the T-shaped three-way pipe 6 to the atmospheric sampler, which is a correct pipeline connection method. When the atmospheric sampler is running, the indoor air enters the air inlet 3 through the T-tube 7, and enters the bubble absorption bottle body 1 through the bubble absorption bottle inner tube 2. The atmospheric sampler draws the air in the bubble absorption bottle body 1 through the exhaust hose 10, the T-shaped three-way pipe 6, and the exhaust port 5, which can avoid wrong pipeline connection, can smoothly collect pollutants in the air, and avoid the absorption liquid from being sucked back into the atmospheric sampler.

Claims

1. An air sampling device for indoor environmental quality detection, comprising a bubble absorption bottle body (1) and a bubble absorption bottle inner tube (2), the top end of the bubble absorption bottle inner tube (2) is an air inlet (3) and protrudes outside the bottle mouth of the bubble absorption bottle body (1), and the side wall of the bubble absorption bottle body (1) is provided with an air extraction port (5) near the bottle mouth, characterized in that: The anti-back-inhalation valve (4) is composed of a sleeve (4.1) and an elastic diaphragm (4.2) installed inside the sleeve (4.1), and the bottom end of the sleeve (4.1) is connected to the air inlet (3); It comprises a T-shaped three-way pipe (6), the left end of which is connected to the end of the air extraction port (5), and a plug (9) for sealing the port is installed at the bottom end of the T-shaped three-way pipe (6); It also includes a T-tube (7), which is installed in the T-tube (6) to block the internal flow channel of the T-tube (6), or installed in the sleeve (4.1) to open the elastic diaphragm (4.2) and communicate with the air inlet (3).

2. The air sampling device for indoor environmental quality detection according to claim 1, characterized in that: The elastic diaphragm (4.2) is in the shape of a circular sheet and is made of an elastic rubber material or an elastic silicone material. An annular step is provided on the inner side wall of the top end of the sleeve (4.1), and the elastic diaphragm (4.2) is fixedly mounted on the annular step surface.

3. The air sampling device for indoor environmental quality detection according to claim 1, characterized in that: The bottom end of the sleeve (4.1) is detachably connected to the air inlet (3), and the left end of the T-shaped three-way pipe (6) is detachably connected to the end of the air extraction port (5).

4. The air sampling device for indoor environmental quality detection according to claim 3 is characterized in that: The bottom end of the sleeve (4.1) is detachably connected to the air inlet (3) via a connecting hose (8), and the left end of the T-shaped three-way pipe (6) is detachably connected to the end of the air exhaust port (5) via a connecting hose (8).

5. The air sampling device for indoor environmental quality detection according to claim 1, characterized in that: The plug (9) is made of rubber material or silicone material, is installed at the bottom end of the T-shaped three-way pipe (6), and is interference fit with the inner wall of the T-shaped three-way pipe (6). When the T-shaped pipe (7) is installed in the T-shaped three-way pipe (6), the plug (9) can block the bottom end of the T-shaped pipe (7).

6. The air sampling device for indoor environmental quality detection according to claim 5, characterized in that: The top end surface of the plug (9) is provided with an insertion hole for the bottom end of the T-shaped tube (7) to pass through.

7. The air sampling device for indoor environmental quality detection according to claim 1, characterized in that: The sleeve (4.1), the T-shaped three-way pipe (6) and the T-shaped pipe (7) are all made of glass material.

Images