Atmospheric VOC environment detection device

Abstract

The utility model discloses an atmospheric VOC environment detection device which comprises a sleeve, the bottom of the sleeve is installed on a flat car, the inner wall face of the sleeve is in sliding connection with an inner cylinder bottom sliding block assembly, a center nut is arranged in an inner cylinder, the center nut is in threaded connection with a threaded shaft at the output end of a lifting motor, and the lifting motor is installed on the top face of a lifting disc. The lifting disc is slidably connected with the inner wall face of the inner cylinder, a hinge seat annularly arranged on the lifting disc is hinged to a probe rod assembly through a torsional spring, and a main air pipe of the probe rod assembly is connected to a detection mechanism on the flat car. The probe rod assembly in the device can convey a collected air sample into the detection mechanism to be analyzed, so that the concentration of VOC gas in the atmosphere is detected, the probe rod assembly can be collected into the inner cylinder in the device transferring process and further collected into the sleeve along with the inner cylinder, and the device has the advantages of being dustproof, adjustable and easy to transfer.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental detection equipment, and particularly relates to an atmospheric VOC environmental detection device. Background Art

[0002] VOC is the English abbreviation of volatile organic compounds. A VOC gas detector is a device used to detect toxic and harmful organic gases. In industry, it is used to ensure the standardization of the gases emitted by enterprises to meet the national environmental protection requirements. There are two working principles for VOC gas detectors. One is a photoionization detector, and the other is a flame ionization detector. Among them, the photoionization detector has higher accuracy. It uses an ion lamp (i.e., a UV lamp) to generate ultraviolet light to bombard the target gas, causing the target gas to ionize after absorbing energy, and then calculates the concentration of the target gas based on the tiny current generated after the gas ionization. Currently, the photoionization detectors on the market are relatively bulky and inconvenient to carry, and their intake probes are also prone to ingesting dust, which affects the measurement accuracy. A new type of detection device is needed to solve the above problems. Content of the Utility Model

[0003] To solve the above problems, the utility model proposes an atmospheric VOC environmental detection device, which includes a sleeve. The bottom of the sleeve is installed on a flatbed truck. The bottom slider assembly of the inner cylinder is slidably connected to the inner wall surface of the sleeve. A central nut is arranged inside the inner cylinder, and the central nut is threadedly connected to the threaded shaft at the output end of a lifting motor. The lifting motor is installed on the top surface of a lifting disc, and the lifting disc is slidably connected to the inner wall surface of the inner cylinder. The hinged seats arranged in a ring shape on the lifting disc are hinged to a probe assembly through torsion springs. The main air pipe of the probe assembly is connected to a detection mechanism on the flatbed truck.

[0004] Furthermore, the probe assembly includes a semi-circular rod. The two ear plates at the tail end of the semi-circular rod are hinged to the hinged seats through torsion springs. An intake probe is arranged inside the front end of the semi-circular rod. The bronchus at the tail end of the intake probe is connected to the air ring cavity of the lifting disc. The bottom of the air ring cavity is connected to the main air pipe, and the main air pipe passes through a vertical waist-shaped hole opened on the barrel body of the inner cylinder. A vertical notch corresponding to the vertical waist-shaped hole is opened on the barrel body of the sleeve.

[0005] Furthermore, the main air pipe is a spiral air pipe.

[0006] Furthermore, the slider assembly includes a lower slider, which is slidably connected to the inner wall surface of the sleeve. The threaded hole on the side surface of the lower slider is connected to a vertical hole group opened on the barrel body of the sleeve through bolts. The top of the lower slider is hinged to a plug cover, and the plug cover is rotatably connected to the bottom of the inner cylinder.

[0007] Further, the detection mechanism includes a box body, which is installed on a flatbed truck. The input end of the electromagnetic valve on the top of the box body is connected to the main air pipe, the output end of the electromagnetic valve is connected to the photoionization chamber, the bottom surface of the photoionization chamber is connected to the UV lamp, the built-in collector electrode in the photoionization chamber is electrically connected to the current amplifier, the current amplifier is electrically connected to the computer, and the exhaust pipe of the photoionization chamber is connected to the air pump.

[0008] Further, a dust-proof cover is provided at the top of the sleeve.

[0009] The beneficial effects of the present utility model are as follows: The probe rod assembly in the present utility model can transport the collected air sample to the detection mechanism for analysis, so as to measure the concentration of VOC gas in the atmosphere. The probe rod assembly can be retracted into the inner cylinder during the transfer of the device, and then further retracted into the sleeve along with the inner cylinder. A dust-proof cover is provided at the top of the sleeve. The operator can push the flatbed truck carrying the device to the target site through the handle on the box body, making the device have the characteristics of dust-proof, adjustable and easy to transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is the front view structural schematic diagram when the present utility model is fully extended;

[0011] Figure 2 is Figure 1 the partial enlarged view of area A in

[0012] Figure 3 is the front view structural schematic diagram when the present utility model is semi-extended;

[0013] Figure 4 is Figure 3 the partial enlarged view of area B in

[0014] Figure 5 is the front view structural schematic diagram when the present utility model is retracted;

[0015] Figure 6 is the top view structural schematic diagram when the probe rod assembly in the present utility model is extended.

[0016] The description of the reference numerals is as follows: 1. Sleeve; 101. Vertical notch; 102. Vertical hole group; 2. Flatbed truck; 3. Inner cylinder; 301. Vertical waist hole; 4. Central nut; 5. Lifting motor; 501. Threaded shaft; 6. Lifting disc; 601. Hinge seat; 602. Air ring cavity; 7. Main air pipe; 8. Semi-circular rod; 9. Intake probe; 10. Bronchus; 11. Lower slider; 1101. Threaded hole; 12. Plug cover; 13. Box body; 14. Electromagnetic valve; 15. Photoionization chamber; 16. UV lamp; 17. Collector electrode; 18. Current amplifier; 19. Computer; 20. Air pump; 21. Dust-proof cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] like Figures 1 to 6 As shown, an atmospheric VOC environment detection device comprises a sleeve 1, a dust cover 21 is provided on the top of the sleeve 1, the bottom of the sleeve 1 is installed on a flatbed car 2, the inner wall surface of the sleeve 1 is slidably connected to the lower slider 11 in the slider assembly, the threaded hole 1101 on the side of the lower slider 11 is connected to the vertical hole group 102 opened on the sleeve 1 body through bolts, the top of the lower slider 11 is hinged to the plug cover 12, the plug cover 12 is rotatably connected to the bottom of the inner cylinder 3, the inner cylinder 3 has a built-in center nut 4, the center nut 4 is threadedly connected to the threaded shaft 501 at the output end of the lifting motor 5, the lifting motor 5 is installed on the top surface of the lifting disk 6, the lifting disk 6 is slidably connected to the inner wall surface of the inner cylinder 3, the hinged seat 601 arranged around the lifting disk 6 is hinged to the probe rod assembly through a torsion spring, when the lifting disk 6 is driven by the lifting motor 5 to rise to the highest point, the torsion spring can open the probe rod assembly originally contracted in the inner cylinder 3.

[0021] In this embodiment, the probe assembly includes a semi-circular rod 8. The two ear plates at the tail end of the semi-circular rod 8 are hinged to the hinge seat 601 through a torsion spring. An intake probe 9 is built into the front end of the semi-circular rod 8. The bronchus 10 at the tail end of the intake probe 9 is connected to the air ring cavity 602 of the lifting disc 6. The bottom of the air ring cavity 602 is connected to the main air pipe 7. The main air pipe 7 is a spiral air pipe for easy expansion and contraction. The main air pipe 7 passes through the vertical waist hole 301 opened on the body of the inner cylinder 3. The body of the sleeve 1 is provided with a vertical notch 101 corresponding to the vertical waist hole 301. The vertical notch 101 can prevent interference between the sleeve 1 and the main air pipe 7 when the device contracts. The main air pipe 7 is connected to the detection mechanism. The detection mechanism includes a box body 13. The box body 13 is installed on the flatbed truck 2. The input end of the solenoid valve 14 at the top of the box body 13 is connected to the main air pipe 7. The output end of the solenoid valve 14 is connected to the photoionization chamber 15. The bottom surface of the photoionization chamber 15 is connected to the UV lamp 16. The collection electrode 17 built into the photoionization chamber 15 is electrically connected to the current amplifier 18. The current amplifier 18 is electrically connected to the computer 19. The exhaust pipe of the photoionization chamber 15 is connected to the air pump 20.

[0022] The working principle of the present utility model is as follows:

[0023] Push the flatbed truck 2 carrying the device to the target site through the handle on the box body 13. Open the dust cover 21. Pull out the inner cylinder 3 from the sleeve 1 and fix it with bolts. The angle between the sleeve 1 and the inner cylinder 3 can be adjusted as needed to facilitate the insertion of the inner cylinder 3 into special positions such as the chimney inspection window. Start the lifting motor 5 to drive the lifting disc 6 to move upward. When the lifting disc 6 reaches the upper dead center, the torsion spring at the hinge seat 601 drives the semi-circular rod 8 to extend in all directions. Start the air pump 20. The gas to be measured enters the photoionization chamber 15 from each intake probe 9 along the pipeline and the solenoid valve 14. The UV lamp 16 emits ultraviolet light to irradiate the gas in the chamber. The VOC components in the gas are ionized and collected by the collection electrode 17. After the current amplifier 18 senses the micro-current change of the collection electrode 17, it sends the amplified electrical signal to the computer 19 for processing and display.

[0024] The probe assembly in the present utility model can transport the collected air samples to the detection mechanism for analysis, thereby measuring the concentration of VOC gases in the atmosphere. The probe assembly can be retracted into the inner cylinder 3 during the transfer of the device, and further retracted into the sleeve 1 along with the inner cylinder 3, making the device dust-proof, adjustable, and easy to transfer.

[0025] The above shows and describes the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. An atmospheric VOC environmental detection device, comprising a sleeve (1), characterized in that: The bottom of the sleeve (1) is installed on the flatbed truck (2). The bottom slider assembly of the inner cylinder (3) is slidably connected to the inner wall surface of the sleeve (1). A central nut (4) is built into the inner cylinder (3). The central nut (4) is threadedly connected to the threaded shaft (501) at the output end of the lifting motor (5). The lifting motor (5) is installed on the top surface of the lifting disc (6). The lifting disc (6) is slidably connected to the inner wall surface of the inner cylinder (3). The hinge seats (601) provided in a ring shape on the lifting disc (6) are hinged to the probe assembly through torsion springs. The main air pipe (7) of the probe assembly is connected to the detection mechanism on the flatbed truck (2).

2. An atmospheric VOC environmental detection device according to claim 1, characterized in that: The probe assembly includes a semi-circular rod (8). The two ear plates at the tail end of the semi-circular rod (8) are hinged to the hinge seat (601) through torsion springs. An air inlet probe (9) is built into the front end of the semi-circular rod (8). The bronchus (10) at the tail end of the air inlet probe (9) is connected to the air ring cavity (602) of the lifting disc (6). The bottom of the air ring cavity (602) is connected to the main air pipe (7). The main air pipe (7) passes through the vertical waist-shaped hole (301) opened on the barrel body of the inner cylinder (3). A vertical notch (101) corresponding to the vertical waist-shaped hole (301) is opened on the barrel body of the sleeve (1).

3. The atmospheric VOC environmental detection device according to claim 1, characterized in that: The main air pipe (7) is a spiral air pipe.

4. An atmospheric VOC environmental detection device according to claim 1, characterized in that: The slider assembly includes a lower slider (11). The lower slider (11) is slidably connected to the inner wall surface of the sleeve (1). The threaded hole (1101) on the side surface of the lower slider (11) is connected to the vertical hole group (102) opened on the barrel body of the sleeve (1) through bolts. The top of the lower slider (11) is hinged to a plug cover (12). The plug cover (12) is rotatably connected to the bottom of the inner cylinder (3).

5. The atmospheric VOC environmental detection device according to claim 1, characterized in that: The detection mechanism includes a box body (13). The box body (13) is installed on the flatbed truck (2). The input end of the solenoid valve (14) at the top of the box body (13) is connected to the main air pipe (7). The output end of the solenoid valve (14) is connected to the photoionization chamber (15). The bottom surface of the photoionization chamber (15) is connected to a UV lamp (16). A collecting electrode (17) built into the photoionization chamber (15) is electrically connected to a current amplifier (18). The current amplifier (18) is electrically connected to a computer (19). The exhaust pipe of the photoionization chamber (15) is connected to an air pump (20).

6. An atmospheric VOC environmental detection device according to claim 1, characterized in that: A dust cover (21) is provided at the top of the sleeve (1).

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