A VOC detection device

Abstract

The application relates to the technical field of environment detection, and discloses a VOC detection device which comprises a gas collecting box and a detection box, the detection box is installed on one side of the gas collecting box and communicates with the gas collecting box, further comprises an air inlet part, moisture absorbing sheets, a storage box and a mounting box, the air inlet part is connected with the gas collecting box and communicates with the gas collecting box, the mounting box is supported by the detection box, and the storage box is installed at the top end of the mounting box; a drop opening is arranged at one side of the bottom end of the storage box, a conveying assembly for spacing and storing a plurality of moisture absorbing sheets is arranged in the storage box, a driving assembly matched with the conveying assembly is further arranged on the storage box, and a taking and placing opening is arranged at one side of the storage box; the air inlet part comprises a first pipeline and a second pipeline; the top end and the bottom end of the mounting box are both provided with openings; an opening and closing assembly for opening and closing the openings is arranged at each opening of the mounting box, and a linkage part is arranged between the opening and closing assembly and the second pipeline. The application can reduce the situation that the VOC detection device cannot continue to work normally.

Description

Technical Field

[0001] This application relates to the technical field of environmental monitoring, and in particular to a VOC detection device. Background Technology

[0002] VOCs are common air pollutants originating from various industrial processes, chemicals, solvents, and fuels. VOC detection devices are used to detect the VOC content in gases in the environment.

[0003] A Chinese patent document with publication number CN114813262A discloses a high-precision VOC detection device, including an inlet pipe, a gas collection box, and a detection box. The inlet pipe is connected to and communicates with the gas collection box. The detection box is located on one side of the gas collection box and communicates with it. An insertion fixing mechanism is welded to the inlet pipe, and an insertion mating mechanism is detachably connected to the insertion fixing mechanism. A moisture-absorbing sheet is placed between the insertion mating mechanism and the insertion fixing mechanism. In use, external gas enters through the inlet pipe, passes through the moisture-absorbing sheet, and then enters the gas collection box to reduce interference from moisture in the gas being detected. The gas in the gas collection box enters the detection box for detection. When the moisture-absorbing sheet is saturated with moisture, the insertion mating mechanism is removed from the insertion fixing mechanism to allow for replacement of the moisture-absorbing sheet.

[0004] Regarding the aforementioned technologies, when it is necessary to replace the moisture absorption sheet, sometimes a replacement moisture absorption sheet cannot be found, causing the VOC detection device to malfunction. Summary of the Invention

[0005] In order to reduce the occurrence of VOC detection devices failing to continue working properly, this application provides a VOC detection device.

[0006] This application provides a VOC detection device, which adopts the following technical solution:

[0007] A VOC detection device includes a gas collection box and a detection box. The detection box is installed on one side of the gas collection box and communicates with the gas collection box. The device also includes an air inlet, a moisture absorption sheet, a storage box, and an installation box. The air inlet is connected to and communicates with the gas collection box. The installation box is supported by the detection box. The storage box is installed on the top of the installation box.

[0008] The storage box has a drop-out opening on one side of its bottom end. The storage box is equipped with a conveying assembly for storing multiple vertically placed moisture-absorbing sheets at intervals. The storage box is also equipped with a driving assembly that cooperates with the conveying assembly to drive the conveying assembly to move the moisture-absorbing sheets near the drop-out opening to drop them at the drop-out opening. The storage box has a pick-and-place opening on one side, and the storage box is detachably connected to a cover for opening and closing the pick-and-place opening.

[0009] The air intake component includes a first pipe and a second pipe respectively installed on opposite sides of the mounting box. The end of the second pipe away from the mounting box is connected to the gas collection box. The first pipe and the second pipe are coaxial in part within the mounting box, and the second pipe can extend and retract within the mounting box so that the first pipe and the second pipe can be connected or separated.

[0010] The installation box has openings at both its top and bottom for the moisture-absorbing sheet to pass through. The openings at the top and bottom of the installation box are opposite each other, and the opening at the top of the installation box is connected to the drop-out port. The installation box has an opening and closing component at each of the openings for opening and closing the openings. The opening and closing component is connected to the second pipe, so that when the opening is opened, the second pipe retracts to form a space between itself and the first pipe for placing the moisture-absorbing sheet.

[0011] By adopting the above technical solution, multiple moisture absorption sheets are first stored in a storage box. When the detection box is needed, one moisture absorption sheet is dropped from the storage box into the installation box and positioned between the first and second pipes, allowing moisture to be absorbed by the gas flowing from the first pipe into the second pipe. To replace the moisture absorption sheet between the first and second pipes, the opening at the bottom of the installation box is opened, allowing the moisture absorption sheet to fall out. Then, a moisture absorption sheet is taken from the storage box and fitted between the first and second pipes in the installation box. Placing multiple moisture absorption sheets in the storage box reduces the likelihood of not finding a suitable replacement sheet when needed, thus minimizing the possibility of the VOC detection device malfunctioning.

[0012] Optionally, the conveying assembly includes two conveying groups, which are respectively conveyed at the upper and lower ends of the storage box. Each conveying group includes...

[0013] The conveyor rollers have two parallel axes, and the two conveyor rollers rotate on opposite sides of the storage box respectively;

[0014] The conveyor belt is simultaneously mounted on two of the conveyor rollers in the same conveyor group; and

[0015] The separator strips are multiple in number and are evenly spaced on the conveyor belt along the conveying direction, and there is a limiting space between two adjacent separator strips for placing the moisture absorption sheet.

[0016] The two conveyor groups are mirror-symmetrical along the horizontal plane in the middle of the storage box.

[0017] By adopting the above technical solution, the conveyor roller rotates to drive the conveyor belt to move, thereby moving the moisture absorption sheet, and the separator strips space multiple moisture absorption sheets apart.

[0018] Optionally, the driving component includes

[0019] A rotating component is connected to one of the conveyor rollers in the conveyor group to drive the conveyor roller to rotate;

[0020] A synchronizing element is disposed between the two conveying groups to cause the conveying rollers in the other conveying group to rotate synchronously in the opposite direction when the rotating element drives the conveying rollers in one of the conveying groups to rotate.

[0021] By adopting the above technical solution, when the rotating component drives one of the conveyor rollers to rotate, the conveyor rollers of the two conveyor groups rotate in opposite directions at the same time, thereby improving the convenience of driving the upper and lower conveyor belts.

[0022] Optionally, the opening / closing component includes

[0023] The opening / closing plate slides between the mounting box and the corresponding opening.

[0024] A first elastic element is disposed between the opening / closing plate and the mounting box to provide elastic force for the opening / closing plate to slide out of the mounting box on one side to close the opening;

[0025] A pusher is slidably mounted on the mounting box along the sliding direction of the opening and closing plate, so as to push the opening and closing plate into the mounting box, and the pusher forms a space for the moisture absorption sheet to pass through.

[0026] By adopting the above technical solution, the opening and closing plate closes the passage under the elastic force of the first elastic element, and the opening and closing plate is moved by pushing the pusher to open the passage.

[0027] Optionally, the second pipe includes a first section, a second section, and a third section connected in sequence. The first section is opposite to the first pipe, the third section is connected to the gas collection box, and the first section and the third section are made of rigid materials, while the second section is made of flexible material that can stretch and contract.

[0028] Optionally, a mating seat is provided on the first section of the second pipe. The linkage is connected to the opening and closing plate and moves together with the opening and closing plate. The mating seat has a travel groove for the linkage to slide. When the pusher of one of the opening and closing components pushes the opening and closing plate, it causes the linkage on the opening and closing plate to abut against the inner wall of the travel groove to push the mating seat to move away from the first pipe, while the linkage on the opening and closing plate of the other opening and closing component remains stationary relative to the mounting box.

[0029] By adopting the above technical solution, the cooperation between the linkage and the stroke groove ensures that when one of the opening and closing plates moves the mating seat and the first section, the other opening and closing plate is not easily moved, so that the actions of the opening and closing plates at the upper and lower ends of the mounting box do not interfere with each other.

[0030] Optionally, a reset assembly is provided between the mating seat and the mounting box, the reset assembly including...

[0031] A base is disposed on the inner wall of the mounting box and is opposite to the mating seat;

[0032] A guide rod is connected to the mating seat and slides along the sliding direction of the opening and closing plate on the base;

[0033] The second elastic element is connected between the mating seat and the base seat, and is used to give the mating seat an elastic force to move towards the first pipe.

[0034] By adopting the above technical solution, the reset component can drive the first segment to move closer to the first pipe when the moisture absorption sheet is located between the first segment and the first pipe, so that the moisture absorption sheet is clamped between the first segment and the first pipe.

[0035] Optionally, the end face of the mating seat near the first pipe is flush with the end face of the first segment near the first pipe.

[0036] By adopting the above technical solution, the mating seat is flush with the end face of the first section so that when the first section abuts against the moisture absorption sheet, the mating seat also abuts against the moisture absorption sheet, thereby increasing the contact area between the second pipe and the moisture absorption sheet, reducing stress concentration, and improving the stability of the moisture absorption sheet.

[0037] Optionally, the VOC detection device further includes a receiving box, which includes a box body and a cover. The box body is installed at the detection box, and the top of the box body abuts against the bottom of the installation box. The top of the box body has an inlet that communicates with the opening at the bottom of the installation box to allow the moisture absorption sheet to pass through. The box body has an outlet for removing the moisture absorption sheet, and the cover is detachably connected to the outlet to open and close the outlet.

[0038] By adopting the above technical solution, the receiving box collects the moisture absorption sheets that fall out of the installation box.

[0039] Optionally, the cover is located at the bottom of the box body, and a receiving seat located in the box body is rotatably connected to the cover. The receiving seat is provided with multiple limiting grooves along its own axial direction. When the receiving seat rotates, any one of the limiting grooves can be aligned with the inlet so that the moisture absorption sheet can be inserted. Furthermore, a handle connected to the receiving seat is connected to the outside of the cover so as to drive the receiving seat to rotate.

[0040] By adopting the above technical solution, the relative position of the limiting groove and the inlet can limit the moisture absorption sheet falling onto the receiving seat, thereby improving the stability of the moisture absorption sheet in the receiving seat.

[0041] In summary, this application has the following beneficial effects:

[0042] Multiple moisture absorption sheets are stored in a storage box, and when needed, they are moved between the first and second pipes in the installation box. This reduces the chances of not being able to find a replacement moisture absorption sheet and minimizes the possibility of the VOC detection device failing to continue working properly. Attached Figure Description

[0043] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0044] Figure 2 This is a cross-sectional view of the storage box in an embodiment of this application;

[0045] Figure 3 This is a schematic diagram of the storage box structure in an embodiment of this application;

[0046] Figure 4 This is a schematic diagram of the installation box in an embodiment of this application;

[0047] Figure 5 This is a cross-sectional view of the mounting box in an embodiment of this application;

[0048] Figure 6 yes Figure 5 Enlarged structural diagram at point A;

[0049] Figure 7 This is a schematic diagram of the receiving box in an embodiment of this application;

[0050] Figure 8 This is a schematic diagram of the structure of the cover in an embodiment of this application;

[0051] Figure 9 This is a schematic diagram of the structure of the bottom of the cover in an embodiment of this application.

[0052] Explanation of reference numerals in the attached drawings: 1. Gas collection box; 2. Detection box; 3. Air inlet; 4. Moisture absorption sheet; 5. Storage box; 6. Installation box; 7. Drop outlet; 8. Pick-up and drop-out port; 9. Cover; 10. First pipe; 11. Second pipe; 111. First section; 112. Second section; 113. Third section; 12. Through port; 13. Linkage component; 14. Conveyor assembly; 141. Conveyor roller; 142. Conveyor belt; 143. Separator bar; 15. Rotating component; 16. Synchronizing component; 16 1. First gear; 162. Second gear; 17. Opening / closing plate; 18. First elastic element; 19. Pushing element; 191. Insert rod; 192. Push rod; 20. Mating seat; 21. Stroke groove; 22. Base seat; 23. Guide rod; 24. Second elastic element; 25. Receiving box; 251. Box body; 252. Cover; 26. Inlet; 27. Outlet; 28. Receiver seat; 29. ​​Limiting groove; 30. Handle; 31. Slide groove; 32. Clearance groove; 33. Suction fan. Detailed Implementation

[0053] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0054] This application discloses a VOC detection device. (Refer to...) Figure 1 and Figure 2 The VOC detection device includes a gas collection box 1, a detection box 2, an air inlet 3, a moisture absorption sheet 4, a storage box 5, an installation box 6, and a receiving box 25. The detection box 2 is installed on one side of the gas collection box 1 and is connected to the gas collection box 1.

[0055] Mounting box 6 is fixed to the top of detection box 2 via mounting legs. Air inlet 3 is mounted on mounting box 6 and communicates with gas collection box 1. Storage box 5 is mounted on top of mounting box 6. Storage box 5 stores moisture-absorbing sheets 4, and mounting box 6 receives moisture-absorbing sheets 4 that fall from storage box 5, positioning them between the gas channels of air inlet 3. This allows external gas to enter air inlet 3, absorb moisture through moisture-absorbing sheets 4, and then enter gas collection box 1. The moisture-absorbed gas then enters detection box 2 from gas collection box 1 for testing. Receiving box 25 is mounted at the bottom of mounting box 6 to receive moisture-absorbing sheets 4 that fall from mounting box 6, separating used moisture-absorbing sheets 4. The sensors and other electronic components used for detection in detection box 2 are existing technology for VOC detection devices and will not be described in detail here.

[0056] The moisture absorption sheet 4 has a square sheet structure. The moisture absorption sheet 4 can be made of materials such as silica gel, activated alumina, and molecular sieves, which have high hygroscopicity, allow VOCs to pass through, and do not easily adsorb VOCs.

[0057] Reference Figure 2 and Figure 3 A drop opening 7, communicating with the interior of the storage box 5, is provided on one side of the bottom end of the storage box 5. The cross-sectional dimension of the drop opening 7 is larger than the cross-sectional dimension of the vertically arranged moisture-absorbing sheets 4. A conveying assembly is installed inside the storage box 5. Multiple moisture-absorbing sheets 4 can be placed on the conveying assembly at intervals with their surfaces vertically aligned. The distribution direction of the moisture-absorbing sheets 4 is parallel to the length direction of the storage box 5, and the length direction of the storage box 5 is perpendicular to the surfaces of the moisture-absorbing sheets 4. The drop opening 7 is located on one side of the conveying assembly, and the storage box 5 also has a driving assembly that cooperates with the conveying assembly. The driving assembly can drive the conveying assembly to move the moisture-absorbing sheets 4 along the length direction of the storage box 5 to the drop opening 7, so that the moisture-absorbing sheets 4 fall out from the drop opening 7.

[0058] Reference Figure 2 Specifically, the conveying assembly includes two conveying groups 14, which are respectively installed at the upper and lower ends inside the storage box 5, and are mirror-symmetrical about the horizontal plane in the middle of the storage box 5. Each conveying group 14 includes a conveying roller 141, a conveyor belt 142, and a separator bar 143. Each conveying group 14 has two conveying rollers 141, which are rotatably connected inside the storage box 5. The distribution direction of the two conveying rollers 141 on the storage box 5 is parallel to the length direction of the storage box 5, and the axial direction of the conveying rollers 141 is parallel to the width direction of the storage box 5. The outer wall of the conveying roller 141 has multiple strip-shaped teeth evenly spaced along its own axial direction, and the length direction of the teeth on the conveying roller 141 is parallel to the axial direction of the conveying roller 141.

[0059] The conveyor belt 142 is an internal toothed synchronous belt with teeth inside, and the conveyor belt 142 is made of rubber. The conveyor belt 142 is simultaneously fitted onto the rollers of two conveyor rollers 141 in the same group, and the teeth inside the conveyor belt 142 mesh with the teeth of the conveyor rollers 141, so that when the conveyor rollers 141 rotate, they drive the conveyor belt 142 to carry out the transport.

[0060] Each conveyor group 14 has multiple separator bars 143, which are fixed to the outer wall of the conveyor belt 142. The length direction of the separator bars 143 is parallel to the axial direction of the conveyor roller 141. The multiple separator bars 143 are evenly spaced along the conveying direction of the conveyor belt 142, and the part of the separator bar 143 connected to the conveyor belt 142 is also made of deformable rubber material to adapt to the deformation of the conveyor belt 142 as it passes the conveyor roller 141. The space between two adjacent separator bars 143 forms a limiting space for the insertion of the moisture absorption sheet 4.

[0061] Reference Figure 2The partition strips 143 at the upper and lower ends of the storage box 5 correspond one-to-one with each other, so that the limiting spaces at the upper and lower ends of the storage box 5 correspond one-to-one. The distance between the conveyor belts 142 at the upper and lower ends of the storage box 5 and the side closest to each other is adapted to the height of the moisture absorption sheet 4, so that the moisture absorption sheet 4 can be inserted between the conveyor belts 142 at the upper and lower ends of the storage box 5 and the moisture absorption sheet 4 is kept vertical under the limitation of the partition strips 143.

[0062] Reference Figure 2 and Figure 3 The drive assembly includes a rotating component 15 and a synchronizing component 16. The rotating component 15 is a rotating handle. The shaft of the conveyor roller 141, located at the lower end of the storage box 5 and away from the drop outlet 7, extends out of the storage box 5 and is fixed coaxially with the rotating handle. The rotating handle is located outside the storage box 5. Rotating the rotating handle drives the conveyor roller 141 to rotate.

[0063] The synchronizing element 16 includes a first gear 161 and a second gear 162, with two of each. The shaft of the conveyor roller 141, located at the upper end of the storage box 5 and away from the drop outlet 7, also extends out of the storage box 5. The two first gears 161 are coaxially fixedly sleeved on the shafts extending to the outside of the storage box 5 at its upper and lower ends. The two second gears 162 rotate on the outer wall of the storage box 5 via a rotating shaft. The axes of the second gears 162 are parallel to the axes of the first gears 161. The two second gears 162 mesh with the two first gears 161 respectively, and the two second gears 162 mesh with each other.

[0064] Reference Figure 1 and Figure 2 When the handle is turned, the transmission of the first gear 161 and the second gear 162 drives the conveyor rollers 141 at the upper and lower ends of the storage box 5 to rotate in the opposite direction, so that the conveyor belts 142 at the upper and lower ends of the storage box 5 are transmitted in the opposite direction, thereby driving the moisture absorption sheet 4 located between the two conveyor belts 142 to be transmitted in the same direction, so that the moisture absorption sheet 4 near the drop port 7 can be moved to the drop port 7 and fall from the drop port 7 to the installation box 6.

[0065] Reference Figure 4 and Figure 5 The installation box 6 is a square box, and its length is parallel to that of the storage box 5. Both the top and bottom of the installation box 6 have openings 12 on the same side, communicating with the interior of the installation box 6. The size of the openings 12 is larger than that of the moisture absorption sheet 4. Figure 3 The drop-out 7 of the storage box 5 is opposite to and connected to the through-hole 12 on the upper part of the mounting box 6, and the mounting box 6 is provided with an opening and closing component at each through-hole 12, which corresponds to the through hole to open and close the through hole.

[0066] When the opening and closing component at the top of the mounting box 6 closes the opening 12, the storage box 5 and the mounting box 6 are relatively isolated. The moisture-absorbing sheet 4 located at the drop-out 7 inside the storage box 5 rests against the opening and closing component at the top of the mounting box 6. When the opening and closing component at the top of the mounting box 6 opens the opening 12, the moisture-absorbing sheet 4 located at the drop-out 7 inside the storage box 5 can fall into the mounting box 6 through the opening 12 and be supported by the opening and closing component at the bottom of the mounting box 6. When the opening and closing component at the bottom of the mounting box 6 opens the opening 12, the moisture-absorbing sheet 4 inside the mounting box 6 falls out of the mounting box 6 from the opening 12.

[0067] Reference Figure 5 and Figure 6 Each opening and closing assembly includes an opening and closing plate 17, a first elastic element 18, and a pushing element 19. The opening and closing plate 17 is a square plate extending horizontally. The opening and closing plate 17 slides along the length of the mounting box 6 in the box wall corresponding to the opening 12. The box wall of the mounting box 6 has a groove 31 for the opening and closing plate 17 to slide. The first elastic element 18 is a spring installed in the groove 31. One end of the first elastic element 18 is connected to the inner wall of the groove 31 away from the opening 12, and the other end of the first elastic element 18 is connected to the side of the opening and closing plate 17 away from the opening 12 and located in the mounting box 6. The first spring provides a spring force to the opening and closing plate 17 to move towards the opening 12. Without any other external force, the spring force of the first spring drives the side of the opening and closing plate 17 away from the first spring to slide out of the groove 31 and abut against the inner wall of the mounting box 6 to close the opening 12.

[0068] Reference Figure 4 and Figure 6 The pushing member 19 includes two insert rods 191 and two push rods 192. The insert rods 191 are two in number and fixed to the two ends of the push rod 192 that are far apart from each other, making the pushing member 19 U-shaped. The two insert rods 191 pass through the side wall of the mounting box 6 opposite to the opening 12 along the length of the mounting box 6. The two insert rods 191 are parallel to each other and distributed along the width of the mounting box 6. The push rod 192 is located outside the mounting box 6. The extension length of the opening / closing plate 17 along the width of the mounting box 6 is greater than the extension length of the opening 12. The two push rods 192 abut against the two sides of the opening / closing plate 17 that extend beyond the size of the opening 12, so that the opening 12 is located between the two insert rods 191, and the insert rods 191 do not affect the movement of the moisture absorption sheet 4. Furthermore, the push rods 192 and the opening / closing plate 17 are magnetically attracted to each other by embedding mutually attractive magnets.

[0069] When the opening and closing plate 17 closes the opening 12, the straight distance between the push rod 192 and the outer wall of the mounting box 6 is equal to the extension dimension of the opening 12 along the length direction of the mounting box 6. This pushes the push rod 191 towards the outer wall of the mounting box 6, allowing the push rod 191 to push the opening and closing plate 17 until it is completely housed in the wall of the mounting box 6, thereby opening the opening 12 and allowing the moisture absorption plate 4 to enter and exit the mounting box 6.

[0070] Reference Figure 4 and Figure 5 To place the moisture-absorbing sheet 4 located in the mounting box 6 between the air inlet components 3 for absorbing moisture in the gas during gas delivery, the air inlet component 3 includes a first pipe 10 and a second pipe 11. The first pipe 10 and the second pipe 11 are respectively fixed to opposite sides along the length of the mounting box 6. The ends of the first pipe 10 and the second pipe 11 that are close to each other are connected to the mounting box 6, and the end of the first pipe 10 that is away from the second pipe 11 is connected to the outside of the mounting box 6. The end of the second pipe 11 that is away from the first pipe 10 is connected to the gas collection box 1. The second pipe 11 can extend and retract within the mounting box 6 so that the first pipe 10 and the second pipe 11 abut or separate.

[0071] When the second pipe 11 extends to abut against the first pipe 10, gas flows from the first pipe 10 to the second pipe 11. When the second pipe 11 contracts away from the first pipe 10, a space is formed between the first pipe 10 and the second pipe 11 for the moisture absorption sheet 4 to fall. This allows the moisture absorption sheet 4, which falls from the top opening 12 of the mounting box 6, to fall between the first pipe 10 and the second pipe 11, so that when the gas comes out of the first pipe 10, it first passes through the moisture absorption sheet 4 to absorb moisture before entering the second pipe 11.

[0072] Specifically, the first pipe 10 is a circular tube extending along the length of the mounting box 6. One end of the first pipe 10 is located outside the mounting box 6, and the other end of the first pipe 10 extends from the side wall of the mounting box 6 into the mounting box 6 and communicates with the inside of the mounting box 6. The end face of the first pipe 10 inside the mounting box is flush with the inner side wall of the mounting box 6 where the insert rod 191 slides, so that when the moisture absorption sheet 4 falls, it is opposite to the first pipe 10.

[0073] The second pipe 11 includes a first segment 111, a second segment 112, and a third segment 113 connected sequentially along the length of the mounting box 6. The first segment 111 and the second segment 112 are located inside the mounting box 6 and opposite to the first pipe 10. The third segment 113 is fixedly inserted through the mounting box 6 on the side away from the first pipe 10, with the end of the third segment 113 closest to the second segment 112 located inside the mounting box 6, and the end of the third segment 113 away from the second segment 112 extending to the gas collection box 1 and connecting with it. The portions of the first segment 111, the second segment 112, and the third segment 113 located inside the mounting box 6 are all circular tubes with the same diameter as the first pipe 10 and are coaxial with the first pipe 10. The first segment 111 and the third segment 113 are both pipes made of rigid materials, while the second segment 112 is made of a flexible material that can expand and contract. In this embodiment, the material of the second segment 112 is accordion material. When the first segment 111 moves along the axis of the first pipe 10, it can cause the second segment 112 to fold, contract, or expand.

[0074] Reference Figure 5 and Figure 6 In order to move the first segment 111 away from the first pipe 10 when the opening 12 is opened, so as to form a space for placing the moisture absorption sheet 4 between the first segment 111 and the second segment 112, a linkage 13 is provided between the opening and closing plate 17 and the first segment 111 for moving the first segment 111 away from the first pipe 10, and a reset assembly is provided between the first segment 111 and the mounting box 6 for moving the first segment 111 closer to the first pipe 10.

[0075] Specifically, a ring-shaped mating seat 20 is coaxially fixed on the outer wall of the first segment 111. The end of the mating seat 20 facing the first pipe 10 is flush with the end of the first segment 111 facing the first pipe 10. The linkage 13 corresponds one-to-one with the opening and closing plate 17. The linkage 13 is rod-shaped and is fixed to the side of the opening and closing plate 17 away from the opening 12 and extends vertically into the mounting box 6. The mounting box 6 has a clearance groove 32 on the box wall for the opening and closing plate 17 to slide together with the opening and closing plate 17. Both sides of the mating seat 20 along the length of the mounting box 6 are provided with stroke grooves 21. The stroke groove 21 on the upper side of the mating seat 20 is for the bottom end of the linkage 13 on the upper opening and closing plate 17 of the mounting box 6 to abut, and the stroke groove 21 on the lower side of the mating seat 20 is for the top end of the linkage 13 on the lower opening and closing plate 17 of the mounting box 6 to abut, and the linkage 13 can move along the length of the mounting box 6 within the stroke groove 21.

[0076] Reference Figure 5 and Figure 6When there is no moisture absorption sheet 4 in the installation box 6 and both the upper and lower openings 12 are closed, the first segment 111 moves towards the first pipe 10 under the drive of the reset component until it abuts against the first pipe 10. At this time, the linkage 13 abuts against the inner wall of the stroke groove 21 at the end away from the first pipe 10.

[0077] When the opening and closing plate 17 at the top of the mounting box 6 is pushed into the box wall to open the top opening 12 of the mounting box 6, the linkage 13 on the opening and closing plate 17 at the top of the mounting box 6 pushes the mating seat 20 to move away from the first pipe 10, so that the first section 111 is separated from the first pipe 10. The linkage 13 on the opening and closing plate 17 at the bottom of the mounting box 6 is close to the inner wall of the lower stroke groove 21 of the mating seat 20 near the end of the first pipe 10, so that the opening and closing plate 17 at the bottom of the mounting box 6 remains relatively stationary with the mounting box 6, so that the corresponding opening 12 is still closed. Thus, the moisture absorption sheet 4 can fall from the opening 12 at the top of the mounting box 6 into the space between the first section 111 and the first pipe 10, and the bottom end of the moisture absorption sheet 4 abuts against the opening and closing plate 17 at the bottom of the mounting box 6.

[0078] Afterwards, the opening and closing plate 17 at the top of the installation box 6 closes the corresponding port 12 again, and the first section 111 is pushed by the reset component and moves towards the first pipe 10 until it presses against the moisture absorption sheet 4.

[0079] When it is necessary to remove the moisture-absorbing sheet 4, which is clamped between the first pipe 10 and the first section 111, from the mounting box 6, the opening and closing plate 17 at the bottom of the mounting box 6 will be pushed to open the bottom opening 12 of the mounting box 6. During this process, the linkage 13 on the opening and closing plate 17 at the bottom of the mounting box 6 will abut against the inner wall of the relative stroke groove 21 at the end away from the first pipe 10, so as to drive the mating seat 20 and the first section 111 to move away from the first pipe 10, thereby releasing the clamping of the moisture-absorbing sheet 4, so that the moisture-absorbing sheet 4 falls out from the bottom opening 12 of the mounting box 6 into the receiving box 25.

[0080] Reference Figure 5 and Figure 6 The reset assembly includes a base 22, guide rods 23, and a second elastic element 24. Two bases 22 are fixed to the upper and lower inner walls of the mounting box 6, and the bases 22 are opposite to the third segment 113. Two guide rods 23 are fixed to the upper and lower sides of the mating seat 20, respectively, with the length direction of the guide rods 23 parallel to the length direction of the mounting box 6. Each guide rod 23 corresponds one-to-one with one of the two bases 22, and the guide rods 23 slide along the length direction of the mounting box 6 through the corresponding base 22.

[0081] The second elastic element 24 is a spring. The second elastic element 24 corresponds to the guide rod 23 one by one. The second elastic element 24 is sleeved on the outer wall of the corresponding guide rod 23, and the second elastic element 24 is located between the mating seat 20 and the base seat 22. The two ends of the second elastic element 24 that are far apart from each other abut against the mating seat 20 and the base seat 22 respectively. The elastic force of the second elastic element 24 always gives the mating seat 20 a tendency to move closer to the first pipe 10.

[0082] Reference Figure 4 and Figure 7 The receiving box 25 includes a box body 251 and a cover 252. The box body 251 is a square box with an outlet 27 at the bottom. The cover 252 is detachably connected to the bottom of the box body 251 by bolts to open and close the outlet 27 of the box body 251. One side of the box body 251 abuts against the outer wall of one side of the detection box 2, and the top wall of the box body 251 is fixed to the bottom wall of the mounting box 6. The top of the box body 251 has an inlet 26, which corresponds to and communicates with the opening 12 at the bottom of the mounting box 6, allowing the moisture absorption sheet 4 that falls from the bottom of the mounting box 6 to enter the receiving box 25.

[0083] Reference Figure 7 and Figure 8 The upper surface of the cover 252 is rotatably connected to a receiving seat 28. The upper surface of the receiving seat 28 is provided with multiple limiting grooves 29 along its circumference. The size of the limiting grooves 29 is slightly larger than the size of the moisture absorption sheet 4. When the receiving seat 28 rotates, it can rotate so that any one of the limiting grooves 29 is opposite to the inlet 26, so that the bottom end of the moisture absorption sheet 4 falling from the inlet 26 abuts into the limiting groove 29 to limit the moisture absorption sheet 4.

[0084] Reference Figure 8 and Figure 9 Furthermore, a handle 30 is fixed in the middle of the receiving seat 28, extending downward through the cover 252. Rotating the handle 30 causes the receiving seat 28 to rotate. In this embodiment, the receiving seat 28 is square, and the number of upper limit grooves 29 on the receiving seat 28 is four.

[0085] Furthermore, a ball-head plunger (not shown in the figure) is embedded in the upper surface of the cover 252. The ball head of the plunger protrudes from the upper surface of the cover 252. An arc groove is formed on the lower surface of the receiving seat 28 for the ball head plunger to abut. Four arc grooves are evenly spaced along the rotation direction of the receiving seat 28. When the receiving seat 28 rotates, the ball head abuts into the seat of the ball head plunger. When any of the limiting grooves 29 are opposite to the inlet 26, the ball head plunger abuts into one of the arc grooves to limit the position of the receiving seat 28.

[0086] Reference Figure 2 and Figure 3Furthermore, in order to replenish the moisture-absorbing sheet 4 in the storage box 5, a pick-and-place port 8 is provided on the side of the storage box 5 away from the first gear 161 and the second gear 162. The pick-and-place port 8 is located between the conveyor rollers 141 on both sides of the length direction of the storage box 5, and the size of the pick-and-place port 8 is larger than the size of the moisture-absorbing sheet 4, so that the moisture-absorbing sheet 4 can be picked up and placed through the pick-and-place port 8. The storage box 5 is detachably connected to the pick-and-place port 8 by bolts, and the cover 9 is plate-shaped.

[0087] Furthermore, the electronic components inside the detection box 2 easily generate heat during operation. The receiving box 25 can be made of materials with good thermal conductivity, such as metal or ceramic, to conduct the heat from the detection box 2 to the receiving box 25, so that the moisture in the moisture absorption sheet 4 inside the receiving box 25 can evaporate. The storage box 5, the cover 9, the mounting box 6, and the opening and closing plate 17 are all made of materials with good thermal insulation properties and transparency, such as plastic or insulated glass.

[0088] Reference Figure 1 In order to facilitate the intake of gas into the first pipe 10, a suction fan 33 is installed at one end of the first pipe 10 located outside the mounting box 6.

[0089] The implementation principle of a VOC detection device according to an embodiment of this application is as follows: Multiple moisture absorption sheets 4 are placed into a storage box 5 at intervals through the pick-up and drop-out ports 8, and then the pick-up and drop-out ports 8 are sealed with a cover 9. Then, the rotating handle is turned to move the conveyor belt 142 so that the moisture absorption sheet 4 near the drop-out port 7 is brought into contact with the opening and closing plate 17 at the top of the mounting box 6 through the drop-out port 7. Then, the opening and closing plate 17 at the top of the mounting box 6 is pushed to open the opening 12 at the top of the mounting box 6, and the moisture absorption sheet 4 falls between the first section 111 and the first pipe 10. Then, the opening and closing plate 17 closes the opening 12 again, and the first section 111, driven by the reset component, clamps the moisture absorption sheet 4 together with the first pipe 10.

[0090] When it is necessary to replace the moisture-absorbing sheet 4 between the first pipe 10 and the first section 111, push the opening and closing plate 17 at the bottom of the mounting box 6 to open the opening 12 at the bottom of the mounting box 6, so that the moisture-absorbing sheet 4 in the mounting box 6 falls into the receiving box 25. After the opening and closing plate 17 at the bottom of the mounting box 6 closes the opening 12, repeat the operation of moving the moisture-absorbing sheet 4 from the storage box 5 into the mounting box 6.

[0091] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A VOC detection device, comprising a gas collection box (1) and a detection box (2), wherein the detection box (2) is installed on one side of the gas collection box (1) and communicates with the gas collection box (1), characterized in that: It also includes an air intake component (3), a moisture absorption sheet (4), a storage box (5) and an installation box (6). The air intake component (3) is connected and communicates with the gas collection box (1). The installation box (6) is supported by the detection box (2). The storage box (5) is installed on the top of the installation box (6). The storage box (5) has a drop opening (7) on one side of its bottom end. The storage box (5) is equipped with a conveying component for storing multiple vertically placed moisture absorption sheets (4) at intervals. The storage box (5) is also equipped with a driving component that cooperates with the conveying component to drive the conveying component to move the moisture absorption sheet (4) near the drop opening (7) to drop it at the drop opening (7). The storage box (5) has a pick-up and drop opening (8) on one side. The storage box (5) is detachably connected to a cover (9) for opening and closing the pick-up and drop opening (8). The air intake component (3) includes a first pipe (10) and a second pipe (11) respectively installed on opposite sides of the mounting box (6). The end of the second pipe (11) away from the mounting box (6) is connected to the gas collection box (1). The first pipe (10) and the second pipe (11) are partially coaxial in the mounting box (6), and the second pipe (11) can extend and retract in the mounting box (6) so that the first pipe (10) and the second pipe (11) are connected or separated. The top and bottom of the installation box (6) are provided with openings (12) for the moisture absorption sheet (4) to pass through. The openings (12) at the top and bottom of the installation box (6) are opposite to each other, and the openings (12) at the top of the installation box (6) are connected to the drop outlet (7). The installation box (6) is provided with an opening and closing component for opening and closing the openings (12) at each opening. A linkage component (13) is provided between the opening and closing component and the second pipe (11) so that when the opening (12) at the top of the installation box (6) is opened, the second pipe (11) retracts to form a space between it and the first pipe (10) for placing the moisture absorption sheet (4). The opening and closing assembly includes an opening and closing plate (17), a first elastic element (18), and a pushing element (19); the opening and closing plate (17) slides between the mounting box (6) and the opening (12); the first elastic element (18) is disposed between the opening and closing plate (17) and the mounting box (6) to provide elastic force for the opening and closing plate (17) to slide out of the mounting box (6) on one side to close the opening (12); the pushing element (19) slides through the mounting box (6) along the sliding direction of the opening and closing plate (17) to push the opening and closing plate (17) into the mounting box (6), and the pushing element (19) forms a space for the moisture absorption sheet (4) to pass through; The second pipe (11) includes a first section (111), a second section (112) and a third section (113) connected in sequence. The first section (111) is opposite to the first pipe (10), and the third section (113) is connected to the gas collection box (1). The first section (111) and the third section (113) are made of rigid materials, and the second section (112) is made of flexible material that can stretch and contract. A mating seat (20) is provided on the first section (111) of the second pipe (11). The linkage (13) is connected to the opening and closing plate (17) and moves together with the opening and closing plate (17). The mating seat (20) has a travel groove (21) for the linkage (13) to slide. When the pusher (19) of one of the opening and closing components pushes the opening and closing plate (17), the linkage (13) on the opening and closing plate (17) is driven to abut against the inner wall of the travel groove (21) to push the mating seat (20) to move away from the first pipe (10). The linkage (13) on the opening and closing plate (17) of the other opening and closing component remains stationary relative to the mounting box (6).

2. The VOC detection device according to claim 1, characterized in that: The conveying assembly includes two conveying groups (14), which are respectively conveyed at the upper and lower ends of the storage box (5). Each conveying group (14) includes... The conveyor rollers (141) have two parallel axes, and the two conveyor rollers (141) rotate on opposite sides of the storage box (5); Conveyor belt (142), simultaneously fitted onto two conveyor rollers (141) of the same conveyor group (14); and The separator (143) has multiple sections and is evenly spaced on the conveyor belt (142) along the conveying direction of the conveyor belt (142), and there is a limiting space between two adjacent separators (143) for placing the moisture absorption sheet (4); The two conveyor groups (14) are mirror-symmetrical along the horizontal plane of the middle part of the storage box (5).

3. The VOC detection device according to claim 2, characterized in that: The driving component includes A rotating component (15) is connected to a conveyor roller (141) in one of the conveyor groups (14) to drive the conveyor roller (141) to rotate; Synchronizing element (16) is disposed between the two conveying groups (14) and is used to cause the conveying roller (141) in the other conveying group (14) to rotate synchronously in the opposite direction when the rotating element (15) drives the conveying roller (141) in one of the conveying groups (14) to rotate.

4. The VOC detection device according to claim 1, characterized in that: A reset assembly is provided between the mating seat (20) and the mounting box (6), the reset assembly including... The base (22) is disposed on the inner wall of the mounting box (6) and is opposite to the mating seat (20); The guide rod (23) is connected to the mating seat (20) and slides along the sliding direction of the opening and closing plate (17) on the base seat (22); The second elastic element (24) is connected between the mating seat (20) and the base seat (22) and is used to give the mating seat (20) an elastic force to move towards the first pipe (10).

5. A VOC detection device according to claim 4, characterized in that: The end face of the mating seat (20) near the first pipe (10) is flush with the end face of the first segment (111) near the first pipe (10).

6. The VOC detection device according to claim 1, characterized in that: The VOC detection device also includes a receiving box (25), which includes a box body (251) and a cover (252). The box body (251) is installed at the detection box (2), and the top of the box body (251) abuts against the bottom of the mounting box (6). The top of the box body (251) has an inlet (26) that communicates with the opening (12) at the bottom of the mounting box (6) for the moisture absorption sheet (4) to pass through. The box body (251) has an outlet (27) for taking out the moisture absorption sheet (4). The cover (252) is detachably connected to the outlet (27) to open and close the outlet (27).

7. A VOC detection device according to claim 6, characterized in that: The cover (252) is located at the bottom of the box body (251). A receiving seat (28) located in the box body (251) is rotatably connected to the cover (252). The receiving seat (28) is provided with multiple limiting grooves (29) along its own axial direction. When the receiving seat (28) rotates, any one of the limiting grooves (29) can be aligned with the inlet (26) so that the moisture absorption sheet (4) can be inserted. A handle (30) is connected to the outside of the cover (252) and connected to the receiving seat (28) so as to drive the receiving seat (28) to rotate.

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