Air sampling equipment for building site air monitoring

Abstract

The utility model relates to the technical field of sampling equipment, and discloses air sampling equipment for building site air monitoring, which comprises a sampling pipe, an air guide port is fixed at one end of the sampling pipe, the end part of the air guide port is fixedly connected with a connecting pipe through a flange, and an air bellow is fixed at one end of the connecting pipe far away from the sampling pipe in a penetrating manner. By means of the sealable sampling pipe, after the one-way valve is closed and the water valve is opened, the sampling pipe can be washed independently, and after washing is completed and the dustproof filter screen is installed, the sampling pipe can be washed conveniently and rapidly, and the sampling pipe can be washed conveniently and rapidly. According to the air sampling equipment for air monitoring of the building site, air drying can be carried out by opening a fan, a dustproof filter screen can prevent a sampling pipe from being polluted, the problem that the sampling pipe cannot be independently cleaned when the existing air sampling equipment for air monitoring of the building site is used is solved, and the sampling accuracy of the air sampling equipment for air monitoring of the building site is greatly improved.

Description

Technical Field

[0001] This utility model application relates to the field of sampling equipment technology, specifically an air sampling device for air monitoring in building sites. Background Technology

[0002] Air monitoring refers to the sampling and measurement of pollutants in the air at fixed points, continuously or at fixed times. The main items monitored in air include sulfur dioxide, nitrogen monoxide, hydrocarbons, and particulate matter. It is the basis for air quality control and reasonable evaluation of air quality. By regularly or continuously monitoring the main pollutants in the atmospheric environment, it is possible to determine whether the air quality meets the national air quality standards.

[0003] Because the air inside a construction site contains a large amount of dust and debris, even after the internal air is removed during multiple air sampling tests, some dust and debris will remain in the sampling tube. The sampling tubes of existing air sampling equipment for construction site air monitoring are not convenient to be separated and cleaned separately, which can easily affect the accuracy of subsequent sampling tests. Summary of the Invention

[0004] To address the problem that the sampling tubes of existing air sampling devices for building site air monitoring cannot be cleaned separately during use, this invention provides an air sampling device for building site air monitoring to solve the aforementioned problem.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An air sampling device for air monitoring at a construction site includes a sampling tube. One end of the sampling tube is fixed with an air inlet, and the end of the air inlet is fixedly connected to a connecting pipe via a flange. An air box is fixedly connected to the end of the connecting pipe away from the sampling tube, and a fan is installed inside the air box. An air inlet is fixedly connected to the end of the sampling tube away from the air box, and an air inlet valve is installed on the air inlet. A water inlet pipe is fixedly connected to the top of the sampling tube, and a water valve is installed on the water inlet pipe. The water inlet pipe is connected to a clean water source via a water pipe.

[0007] Furthermore, a sampling port is fixedly provided at the top of the sampling tube away from the one-way valve, and a rubber plug is fixed inside the sampling port. A protective cover is rotatably connected to the top surface of the sampling port.

[0008] Furthermore, a protective net is fixed inside the end of the bellows away from the sampling tube, and a vent hole that cooperates with the bellows is opened at the end of the bellows near the sampling tube.

[0009] Furthermore, a protective screw sleeve is threaded onto the end of the air inlet away from the sampling tube, and a dust filter is embedded and fixed inside the protective screw sleeve, with the side of the dust filter fitting against the side of the air inlet.

[0010] Furthermore, the bottom surface of the rubber stopper is flush with the inner wall of the sampling tube, and the thickness of the rubber stopper is less than the thickness inside the sampling port.

[0011] Furthermore, the diameter of the protective cover is equal to the outer diameter of the sampling port, the rear end of the protective cover is rotatably connected to the sampling port via a hinge shaft, and an auxiliary push rod is fixed on the top surface of the front side of the protective cover.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this utility model, the sealable sampling tube allows for separate rinsing by opening the water valve after the one-way valve is closed. After rinsing, the dust filter is installed, and the fan is turned on for air drying. The dust filter prevents the sampling tube from being contaminated, solving the problem that the sampling tube cannot be cleaned separately during the use of existing air sampling equipment for building site air monitoring, and greatly improving the sampling accuracy of air sampling equipment for building site air monitoring.

[0014] 2. In this utility model, the sampling port is sealed with a rubber stopper, which can prevent the internal and external air from mixing again when the air sample is extracted, and also prevent water from entering the sampling port during rinsing, which would cause subsequent air drying difficulties and contamination of the air sample, thus further improving the accuracy of the sampling device. Attached Figure Description

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

[0016] Figure 1 This is a three-dimensional structural diagram of a sampling device according to an embodiment of this application;

[0017] Figure 2 yes Figure 1 The above-illustrative embodiment shows a front sectional view of the sampling device structure.

[0018] Figure 3 yes Figure 1 The illustrated embodiment shows a partial front view of the structure during sampling by the sampling device.

[0019] The meanings of the labels in the attached diagram are as follows: 1. Sampling tube; 2. Air inlet; 3. Connecting pipe; 4. Air box; 5. Fan; 6. Protective net; 7. One-way valve; 8. Air inlet; 9. Air inlet valve; 10. Protective screw; 11. Dust filter; 12. Sampling port; 13. Rubber stopper; 14. Protective cover; 15. Auxiliary push rod; 16. Water inlet pipe; 17. Water valve. Detailed Implementation

[0020] To make the purpose, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Reference Figure 1 , Figure 2 and Figure 3 An air sampling device for air monitoring at a construction site includes a sampling tube 1, an air inlet 2 fixed at one end of the sampling tube 1, and a connecting pipe 3 fixedly connected to the end of the air inlet 2 via a flange. A bellows 4 is fixedly connected to the end of the connecting pipe 3 away from the sampling tube 1. A protective net 6 is fixedly fixed inside the end of the bellows 4 away from the sampling tube 1. A ventilation hole that matches the bellows 4 is opened at the end of the bellows 4 near the sampling tube 1, and a fan 5 is installed inside the bellows 4. An air inlet 8 is fixedly connected to the end of the sampling tube 1 away from the bellows 4. A protective screw sleeve 10 is threaded onto the end of the air inlet 8 away from the sampling tube 1. A dust filter 11 is embedded and fixed inside the protective screw sleeve 10, and the side of the dust filter 11 is attached to the side of the air inlet 8. An air inlet valve 9 is installed on the air inlet 8. A water inlet pipe 16 is fixedly connected to the top of the sampling tube 1, and a water valve 17 is installed on the water inlet pipe 16. A clean water source is connected to the water inlet pipe 16 via a water pipe.

[0022] Specifically, when sampling is required, the blower 5, check valve 7, and air inlet valve 9 are opened to open the air inlet 8, allowing the blower 5 to draw airflow from the outside through the air inlet 8. After sampling is completed, the check valve 7 and air inlet valve 9 are closed to seal the sampling tube 1. Then, the auxiliary push rod 15 is pushed to rotate and open the protective cover 14, allowing the needle to pass through the rubber stopper 13 and be inserted into the sampling tube 1 for sampling. When the sampling tube 1 needs to be cleaned, the check valve 7 or air inlet 8 is opened to allow the airflow inside the sampling tube 1 to be discharged. Then, the check valve 7 is closed, and the air inlet valve 9 and water valve 17 are opened to allow clean water to enter the sampling tube 1 and rinse the inside of the sampling tube 1. After rinsing, the water valve 17 is closed, and the air inlet valve 9 is opened to allow the rinsing wastewater to be discharged.

[0023] As an optimization solution, such as Figure 2 and Figure 3 As shown, a sampling port 12 is fixedly connected to the top of the sampling tube 1 away from the one-way valve 7, and a rubber stopper 13 is fixed inside the sampling port 12. The bottom surface of the rubber stopper 13 is flush with the inner wall of the sampling tube 1, and the thickness of the rubber stopper 13 is less than the thickness inside the sampling port 12. A protective cover 14 is rotatably connected to the top surface of the sampling port 12. The diameter of the protective cover 14 is equal to the outer diameter of the sampling port 12. The rear end of the protective cover 14 is rotatably connected to the sampling port 12 through a hinge shaft. An auxiliary push rod 15 is fixed to the top surface of the front side of the protective cover 14.

[0024] Specifically, when it is necessary to dry the inside of the cleaned sampling tube 1, the protective screw 10 is screwed onto the air inlet 8 and fixed, so that the dust filter 11 is against the air inlet 8. The fan 5 is turned on, so that the fan 5 runs and drives the external airflow into the sampling tube 1. Before entering, it is filtered through the dust filter 11, so that the inner wall of the sampling tube 1 can be dried. After drying, it can be used again.

[0025] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An air sampling device for air monitoring at a construction site, characterized in that: Includes a sampling tube (1), one end of which is fixed with an air inlet (2), and the end of the air inlet (2) is fixedly connected to a connecting pipe (3) via a flange. The end of the connecting pipe (3) away from the sampling tube (1) is fixedly connected to a bellows (4), and a fan (5) is installed inside the bellows (4). The end of the sampling tube (1) away from the bellows (4) is fixedly connected to an air inlet (8), and an air inlet valve (9) is installed on the air inlet (8). A water inlet pipe (16) is fixedly connected to the top of the sampling tube (1), and a water valve (17) is installed on the water inlet pipe (16). The water inlet pipe (16) is connected to a clean water source via a water pipe.

2. The air sampling equipment for building site air monitoring according to claim 1, characterized in that: The sampling tube (1) has a sampling port (12) fixed at the top of the end away from the one-way valve (7), and a rubber stopper (13) is fixed inside the sampling port (12). A protective cover (14) is rotatably connected to the top surface of the sampling port (12).

3. The air sampling equipment for building site air monitoring according to claim 1, characterized in that: The bellows (4) has a protective net (6) fixed inside the end away from the sampling tube (1), and the bellows (4) has a ventilation hole that matches the bellows (4) at the end near the sampling tube (1).

4. The air sampling equipment for building site air monitoring according to claim 1, characterized in that: The end of the air inlet (8) away from the sampling tube (1) is threaded with a protective screw sleeve (10). A dust filter (11) is embedded and fixed inside the protective screw sleeve (10), and the side of the dust filter (11) is in contact with the side of the air inlet (8).

5. The air sampling equipment for building site air monitoring according to claim 2, characterized in that: The bottom surface of the rubber stopper (13) is flush with the inner wall of the sampling tube (1), and the thickness of the rubber stopper (13) is less than the thickness inside the sampling port (12).

6. The air sampling equipment for building site air monitoring according to claim 2, characterized in that: The diameter of the protective cover (14) is equal to the outer diameter of the sampling port (12). The rear end of the protective cover (14) is rotatably connected to the sampling port (12) through a hinge shaft. An auxiliary push rod (15) is fixed on the top surface of the front side of the protective cover (14).

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