CN219224284U

CN219224284U - Automatic sampling device for volatile organic compounds

Info

Publication number: CN219224284U
Application number: CN202320492856.XU
Authority: CN
Inventors: 王秀丽; 黄强; 兰霜; 李雯; 马万凤; 贺颖; 宋鹏程; 张义烽; 乔君喜
Original assignee: Sichuan Mianyang Ecological Environment Monitoring Center Station
Current assignee: Sichuan Mianyang Ecological Environment Monitoring Center Station
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-06-20
Anticipated expiration: 2033-03-15

Abstract

The application provides an automatic sampling device of volatile organic compounds, include: the device comprises a box body, a guide pipe, a rotating disc and a sampling tank. The box body is penetrated with a guide pipe, the guide pipe is movably arranged along the axis direction, and the upper end of the guide pipe is connected with the sampling head through a pipeline; the rotating disc is rotationally arranged in the box body, the rotating disc is rotated through motor control, a plurality of clamping assemblies are arranged at the top of the rotating disc along a circumferential array and used for installing the sampling tank, connecting pipes are coaxially arranged at the top of the sampling tank, when the rotating disc rotates to a preset position, the connecting pipes align with the guide pipes, and the guide pipes are moved along the axis so as to realize connection and separation of the guide pipes and the connecting pipes. The device can realize automatic sampling through the threshold signal of the detector, avoids manual duty, and is convenient for widely arranging at a plurality of points.

Description

Automatic sampling device for volatile organic compounds

Technical Field

The utility model belongs to the technical field of environment detection sampling equipment, and particularly relates to an automatic volatile organic compound sampling device.

Background

VOC gas (volatile organic compound) is an important detection item in atmospheric detection, and because the VOC gas is greatly influenced by the fluidity of air and the variability of time, the VOC gas needs to be manually controlled for a long time when the sample is collected for a plurality of times, and then the gas sample is collected. The method consumes manpower and material resources, and is inconvenient to realize wide multi-point and multi-time collection.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model provides the automatic volatile organic compound sampling device which can assist in accurate sampling of navigation monitoring and temporarily detect VOC according to the detector _S The concentration is started by the threshold value signal of the detector or by setting any interval time, so that automatic sampling can be realized, manual duty is avoided, and the method is convenient for realizing multiple sampling at multiple points or one point.

In order to achieve the object of the utility model, the following scheme is adopted:

an automatic volatile organic compound sampling device, comprising: the device comprises a box body, a guide pipe, a rotating disc and a sampling tank.

The box body is penetrated with a guide pipe, the guide pipe is movably arranged along the axis direction, and the upper end of the guide pipe is connected with the sampling head through a pipeline;

the rotating disc is rotationally arranged in the box body, the rotating disc is rotated through motor control, a plurality of clamping assemblies are arranged at the top of the rotating disc along a circumferential array and used for installing the sampling tank, connecting pipes are coaxially arranged at the top of the sampling tank, when the rotating disc rotates to a preset position, the connecting pipes align with the guide pipes, and the guide pipes are moved along the axis so as to realize connection and separation of the guide pipes and the connecting pipes.

Further, the box includes the apron, and the pipe is worn to locate the apron perpendicularly, and the connecting pipe is located the top of sampling jar, and perpendicular to apron.

Further, the outside of box is equipped with flexible cylinder, and the pipe passes through a connecting plate and links to each other with flexible cylinder's movable rod, utilizes flexible cylinder to drive the pipe and follow the axis and remove.

Further, the bottom of the rotating disc is provided with a plurality of supporting wheels along the circumferential array.

Further, the lower opening of the conduit is in an inverted funnel structure.

Further, the clamping assembly comprises three side compression bars arranged along the circumference and used for compressing the outer wall of the sampling tank.

Further, the three side compression bars are vertically arranged on a mounting plate, and the distance between the side compression bars and the center of the mounting plate is adjustable.

Further, the mounting panel is disc structure, and it has seted up three spout along the circumference array, and the spout all sets up along the normal direction of mounting panel, and the crossing one end of three spout communicates each other, and the side pressure pole is located respectively in one of them spout, all is equipped with the spring in the spout, and the specification and the length of spring are the same, and the one end interconnect of spring, its other end is connected in the side pressure pole that corresponds respectively, when the side pressure pole compresses tightly in the outer wall of sampling jar, the spring all is in tensile state.

Further, the front end of the catheter is also provided with a filtering structure.

Further, the sampling tank is in a negative pressure state before sampling, a spring is arranged in the connecting pipe, a valve is arranged at the top of the spring and used for enabling the connecting pipe to be in a normally closed state, and a push rod is arranged at the lower end of the guide pipe and used for pushing the valve open.

The utility model has the beneficial effects that: VOC detectable by the detector _S The concentration threshold value can automatically collect samples in real time, no manual duty is needed, the use is convenient, and the multi-point position can be widely usedThe application to the same point position can utilize a plurality of sampling pipes to gather many times, and overall structure is simple.

Drawings

The drawings described herein are for illustration of selected embodiments only and not all possible implementations, and are not intended to limit the scope of the utility model.

Fig. 1 shows a schematic internal structure of a preferred embodiment of the present application.

Fig. 2 shows a partial enlarged view at a in fig. 1.

Fig. 3 shows a schematic view of a preferred construction of the clamping assembly.

Fig. 4 shows a partial cross-sectional view of a preferred construction of the connecting tube and catheter.

The marks in the figure: the device comprises a box body-1, a cover plate-11, a telescopic cylinder-12, a guide pipe-2, a push rod-21, a flow valve-22, a rotating disc-3, a supporting wheel-31, a clamping component-4, a side pressure rod-41, a mounting plate-42, a sliding chute-421, a spring-43, a sampling tank-5, a connecting pipe-51, a spring-52 and a valve-53.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings, but the described embodiments of the present utility model are some, but not all embodiments of the present utility model.

As shown in fig. 1 and 2, an automatic sampling device for volatile organic compounds includes: a box body 1, a conduit 2, a rotating disc 3 and a sampling tank 5.

Specifically, as shown in fig. 1 and 2, the casing 1 is provided with a conduit 2 in a penetrating manner, the conduit 2 is arranged in a moving manner along the axial direction, the specific conduit 2 is controlled to automatically move by a linear electric cylinder or a hydraulic cylinder, the upper end of the conduit 2 is connected with a sampling head through a pipeline, the sampled pipeline can be sampled through a connected air pump, and the sampling head is arranged at a preset sampling position.

Specifically, as shown in fig. 1 and 2, the movable disk 3 is rotatably disposed in the box 1, the movable disk 3 is controlled to rotate by a motor, a plurality of clamping assemblies 4 are disposed on the top of the movable disk 3 along a circumferential array, and are used for mounting a sampling tank 5, a connecting pipe 51 is coaxially disposed on the top of the sampling tank 5, and when the movable disk 3 rotates to a predetermined position, the connecting pipe 51 aligns with the conduit 2, and the conduit 2 is moved along an axis, so as to connect and separate the conduit 2 with the connecting pipe 51.

The sampling device has a control system for detecting VOC based on the detector _S The valve controls the movement of the guide tube 2 and the rotation of the movable disk 3, and controls the opening and closing of the electromagnetic valve 21. When the detector detects the VOC _S When the concentration reaches a threshold value, the sampling device controls the turntable 3 to rotate by a preset angle, the sampling tank 5 is moved below the guide pipe 2, the connecting pipe 51 is aligned with the guide pipe 2 at the moment, then the guide pipe 2 is controlled to move along the axis line into the box body 1, so that the guide pipe 2 is connected with the connecting pipe 51, the electromagnetic valve 21 is opened, and sample air is fed into the sampling tank 5; after the completion of the sampling, the catheter 2 is moved outward to be separated from the connection tube 51. When the detector detects the VOC again _S When the concentration is at the threshold value, the sampling device will continue to rotate the rotary table 3 and continue to sample by using the other empty sampling tank 5, thereby realizing the function of multiple sampling. The device can realize automatic sampling without manual duty, and is suitable for wide application in multiple points.

More specifically, as shown in fig. 1, the case 1 includes a cover plate 11 so as to facilitate loading and unloading of the sampling tank 5 inside the case 1, the pipe 2 is vertically inserted through the cover plate 11, and the connection pipe 51 is located at the top of the sampling tank 5 and is perpendicular to the cover plate 11.

Preferably, the outside of the box 1 is provided with a telescopic cylinder 12, the guide pipe 2 is connected with a movable rod of the telescopic cylinder 12 through a connecting plate, and the telescopic cylinder 12 is utilized to drive the guide pipe 2 to move along the axis. As shown in fig. 1, as a preferred embodiment of the present application, when the case 1 is provided with the cover 11, the telescopic cylinder 12 is provided on the cover 11, and the duct 2 is disposed through the cover 11.

Preferably, as shown in fig. 1, the bottom of the rotating disc 3 is provided with a plurality of supporting wheels 31 along a circumferential array for improving the mounting structure of the rotating disc 3 and making the rotating disc 3 more stable when rotating.

Preferably, the lower end opening of the conduit 2 is of an inverted funnel structure so as to facilitate connection with the connecting pipe 51, so that not only can the guiding function during connection be improved by using the funnel structure, but also the connection part of the conduit 2 and the connecting pipe 51 can form a conical sealing structure so as to improve the sealing effect during connection.

Preferably, as shown in fig. 1, the clamping assembly 4 comprises three side pressure bars 41 arranged circumferentially for pressing against the outer wall of the sampling tank 5.

Preferably, the three side compression bars 41 are all vertically arranged on a mounting plate 42, and the distance between the side compression bars 41 and the center of the mounting plate 42 is adjustable so as to adapt to sampling tanks with different diameters.

Further preferably, as shown in fig. 3, the mounting plate 42 is in a disc structure, three sliding grooves 421 are formed along a circumferential array, the sliding grooves 421 are all arranged along the normal direction of the mounting plate 42, one ends of the three sliding grooves 421 are mutually communicated, the lateral pressure rods 41 are respectively arranged in one sliding groove 421, springs 43 are respectively arranged in the sliding grooves 421, the specifications and the lengths of the springs 43 are the same, one ends of the springs 43 are mutually connected, the other ends of the springs are respectively connected with the corresponding lateral pressure rods 41, when the lateral pressure rods 41 are pressed on the outer wall of the sampling tank 5, the springs 43 are in a stretching state, and the structure not only can enable the lateral pressure rods 41 to press the sampling tanks 5 with different diameters, but also can enable the sampling tanks 5 with different diameters to be located in the middle position of the mounting plate 42 so as to ensure the consistency of the positions of the sampling tanks 5, thereby guaranteeing the consistency of the connection positions of the connecting pipes 51 and the guide pipes 2.

Preferably, the front end of the duct 2 is also provided with a filtering structure for filtering impurities in the air.

Preferably, as shown in fig. 4, the inside of the sampling tank 5 is in a negative pressure state before sampling, a spring 52 is arranged in the connecting pipe 51, a valve 53 is arranged at the top of the spring 52 and used for enabling the connecting pipe 51 to be in a normally closed state, a push rod 21 is arranged at the lower end of the conduit 2 and used for pushing the valve 53, when the conduit 2 is connected with the connecting pipe 51, the push rod 21 pushes the valve 53 downwards, the sampling tank 5 automatically collects a gas sample through a pipeline connected with the conduit 2 by the negative pressure in the inside, and after the conduit 2 is separated from the connecting pipe 51, the valve 53 enables the connecting pipe 51 to be in the normally closed state again under the elastic force of the spring 52. It is further preferred that the conduit 2 is provided with a flow valve 22 for controlling the flow rate of the gas flow.

The foregoing description of the preferred embodiments of the utility model is merely exemplary and is not intended to be exhaustive or limiting of the utility model. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model.

Claims

1. An automatic volatile organic compound sampling device, which is characterized by comprising:

the box body (1) is penetrated with a guide pipe (2), the guide pipe (2) is arranged in a moving way along the axis direction, and the upper end of the guide pipe is connected with the sampling head through a pipeline;

the rotary disc (3) is rotationally arranged in the box body (1), the rotary disc (3) is rotationally controlled by a motor, a plurality of clamping assemblies (4) are arranged at the top of the rotary disc (3) along a circumferential array and used for installing the sampling tank (5), the connecting pipe (51) is coaxially arranged at the top of the sampling tank (5), when the rotary disc (3) rotates to a preset position, the connecting pipe (51) aligns the guide pipe (2), and the guide pipe (2) is moved along the axis so as to realize connection and separation of the guide pipe (2) and the connecting pipe (51).

2. The automatic volatile organic compound sampling device according to claim 1, wherein the box body (1) comprises a cover plate (11), the guide pipe (2) vertically penetrates through the cover plate (11), and the connecting pipe (51) is positioned at the top of the sampling tank (5) and is perpendicular to the cover plate (11).

3. The automatic volatile organic compound sampling device according to claim 1, wherein a telescopic cylinder (12) is arranged outside the box body (1), the guide pipe (2) is connected with a movable rod of the telescopic cylinder (12) through a connecting plate, and the telescopic cylinder (12) is used for driving the guide pipe (2) to move along the axis.

4. The automatic sampling device for volatile organic compounds according to claim 1, characterized in that the bottom of the rotating disc (3) is provided with a plurality of supporting wheels (31) along a circumferential array.

5. The automatic sampling device for volatile organic compounds according to claim 1, wherein the lower opening of the conduit (2) is in the shape of an inverted funnel.

6. The automatic sampling device for volatile organic compounds according to claim 1, characterized in that the clamping assembly (4) comprises three lateral compression bars (41) arranged along the circumference for compressing the outer wall of the sampling tank (5).

7. The automatic volatile organic compound sampling device according to claim 6, wherein three side pressure rods (41) are vertically arranged on a mounting plate (42), and the distance between the side pressure rods (41) and the center of the mounting plate (42) is adjustable.

8. The automatic volatile organic compound sampling device according to claim 7, wherein the mounting plate (42) is of a disc structure, three sliding grooves (421) are formed in the circumferential array, the sliding grooves (421) are all formed in the direction of the normal line of the mounting plate (42), one ends of the three sliding grooves (421) which are intersected are mutually communicated, the side pressing rods (41) are respectively arranged in one sliding groove (421), springs (43) are respectively arranged in the sliding grooves (421), the specifications and the lengths of the springs (43) are the same, one ends of the springs (43) are mutually connected, the other ends of the springs are respectively connected with corresponding side pressing rods (41), and when the side pressing rods (41) are pressed on the outer wall of the sampling tank (5), the springs (43) are in a stretching state.

9. The automatic sampling device for volatile organic compounds according to claim 1, wherein the front end of the conduit (2) is further provided with a filtering structure for filtering impurities in the air.

10. The automatic volatile organic compound sampling device according to claim 1, wherein the inside of the sampling tank (5) is in a negative pressure state before sampling, a spring (52) is arranged in the connecting pipe (51), a valve (53) is arranged at the top of the spring (52) and used for enabling the connecting pipe (51) to be in a normally closed state, and a push rod (21) is arranged at the lower end of the guide pipe (2) and used for pushing the valve (53) open.