A particulate sampling device

Abstract

The present application relates to sampling detection technical field, specifically, a kind of sampling device of particulate matter, including vertical cuboid cylinder and the discharge valve of being located in cuboid cylinder lower end opening;Rectangular discharge hole that is communicated with cuboid cylinder interior is opened in the front side outer wall of cuboid cylinder, further include the feed valve for closing cuboid cylinder upper end opening and with rectangular discharge hole each other cooperation;Feed valve includes fixed semicylinder that is transversely fixed in the rear side inner wall of cuboid cylinder and dynamic semicylinder that is transversely and rotatably connected in rectangular discharge hole and is parallel to fixed semicylinder and is arranged;The radius of fixed semicylinder and the radius of dynamic semicylinder each other cooperation, when the lower edge of dynamic semicylinder and the arc surface outer wall of fixed semicylinder tangent, the plane outer wall of dynamic semicylinder is set up and is inclined distribution with low front high up;The present application simplifies the operation process to reach the effect of time-saving and labor-saving, to improve work efficiency and greatly facilitate use.

Description

Technical Field

[0001] This application relates to the field of sampling and detection technology, and more specifically, to a particulate matter sampling device. Background Technology

[0002] Particulate matter is one of the states in chemical products. After the particulate matter is prepared, it is necessary to sample and test it to confirm the composition, properties, purity and other parameters of the material in order to provide a reliable scientific basis for improving the formula, process and other operations.

[0003] Some chemical particulate matter is suitable for sampling during the packaging process because it can ensure sample representativeness, improve detection accuracy, reduce the risk of contamination, and improve operational efficiency. Currently, most particulate matter sampling is carried out using sampling bags or bottles. However, the operation must be done manually by staff. In order to ensure the accuracy of the sampling amount, the actual sampling amount must be adjusted by repeatedly pouring out or adding particulate matter according to the set sampling amount and referring to the scale. Therefore, the operation is cumbersome, time-consuming, and labor-intensive, resulting in low work efficiency and great inconvenience. A solution is urgently needed. Summary of the Invention

[0004] In view of the current state of the prior art, the technical problem to be solved by the present invention is to provide a particulate matter sampling device that can quickly and accurately complete the automatic sampling of particulate matter, thereby simplifying the operation process to achieve the effect of saving time and effort, thus improving work efficiency and greatly facilitating the use of particulate matter.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a particulate matter sampling device, comprising a vertically arranged rectangular measuring cylinder and a discharge valve provided at the lower opening of the rectangular measuring cylinder; The rectangular discharge hole, which communicates with the interior of the rectangular measuring cylinder, is provided on the front outer wall of the rectangular measuring cylinder. It also includes a feed valve for sealing the upper opening of the rectangular measuring cylinder and cooperating with the rectangular discharge hole. The feed valve includes a fixed semi-cylinder that is horizontally fixed on the inner wall of the rear side of the cuboid measuring cylinder and a movable semi-cylinder that is horizontally and rotatably connected to the rectangular discharge hole and is parallel to the fixed semi-cylinder. The outer walls of the left and right ends of the movable semi-cylinder are slidably attached to the inner walls of the left and right sides of the cuboid measuring cylinder, respectively, and the arc-shaped outer wall of the movable semi-cylinder is slidably attached to the upper and lower edges of the rectangular discharge hole. The radius of the fixed semi-cylinder and the radius of the movable semi-cylinder are matched. When the lower edge of the movable semi-cylinder is tangent to the outer wall of the arc surface of the fixed semi-cylinder, the outer wall of the movable semi-cylinder is set upward and is inclined with the front lower and the back higher. The feed valve also includes a first traction cylinder fixed on the front outer wall of the cuboid measuring cylinder, a U-shaped traction bar horizontally fixed on the telescopic end of the first traction cylinder, two first gears respectively concentrically fixed at the left and right ends of the movable semi-cylinder and located on the left and right sides of the cuboid measuring cylinder, and two first linear racks respectively slidably connected to the left and right outer walls of the cuboid measuring cylinder in the vertical direction and meshing with the two first gears. The telescopic end of the first traction cylinder is set vertically upward, and both ends of the U-shaped traction bar are set backward and fixed on the two first linear racks respectively.

[0006] Preferably, the feed valve further includes two detection units symmetrically arranged on the left and right sides of the cuboid measuring cylinder. Each detection unit includes an adjusting strip vertically fixed to the outer wall of the left or right side of the cuboid measuring cylinder, several position sensors fixed on the adjusting strip and arranged sequentially from top to bottom, each of which can be adjusted vertically to a fixed height, and several transparent covers embedded in the outer wall of the left or right side of the cuboid measuring cylinder. The number of transparent covers is equal to the number of position sensors. The height of each transparent cover is matched with the height of a corresponding position sensor. The sensing end of each position sensor is arranged horizontally and towards the transparent cover to detect the height of the particulate matter inside the cuboid measuring cylinder in real time.

[0007] Preferably, the discharge valve includes a valve plate arranged laterally and slidably connected to the lower opening of the cuboid measuring cylinder, a swing frame rotatably connected to the bottom of the valve plate, two inverted V-shaped swing plates symmetrically arranged on the left and right sides of the valve plate, two extension arms fixed to the middle of the two V-shaped swing plates and symmetrically arranged on the left and right sides, and a rotating shaft arranged laterally and rotatably on the rear outer wall of the cuboid measuring cylinder. The ends of the two extension arms are fixed to the rotating shaft, and the rear ends of the two V-shaped swing plates are rotatably connected to the ends of the swing frame. The front edge of the valve plate has a discharge groove that cooperates with the lower opening of the cuboid measuring cylinder.

[0008] Preferably, the discharge valve further includes a second gear concentrically sleeved and fixed outside the rotating shaft, a second linear rack slidably connected in the vertical direction to the rear outer wall of the cuboid measuring cylinder and meshing with the second gear, and a second traction cylinder fixed on the rear outer wall of the cuboid measuring cylinder and located above the second linear rack. The telescopic end of the second traction cylinder is vertically downward and fixed on the second linear rack.

[0009] Preferably, the discharge valve further includes two return springs symmetrically arranged on the left and right sides of the cuboid measuring cylinder. The upper ends of the two return springs are detachably fixed to the outer walls of the left and right sides of the cuboid measuring cylinder, and the lower ends of the two return springs are detachably fixed to the front ends of the two V-shaped oscillating plates.

[0010] Preferably, a guide assembly is provided between the cuboid measuring cylinder and the discharge valve. The guide assembly includes a base plate fixed laterally to the lower end of the cuboid measuring cylinder, two T-shaped pressure plates symmetrically arranged on the left and right sides of the cuboid measuring cylinder, and a pressure rod fixed laterally between the rear ends of the two T-shaped pressure plates and elastically connected to the rear outer wall of the cuboid measuring cylinder in the vertical direction so as to always have an upward movement tendency. The base plate has a discharge hole located below the opening at the lower end of the cuboid measuring cylinder. The front ends of the two T-shaped pressure plates are rotatably connected to the base plate. The valve plate is slidably connected to the bottom of the base plate in the front-back direction. The lower ends of the two T-shaped pressure plates are movably connected to the left and right sides of the valve plate, respectively.

[0011] Preferably, the lower ends of the two T-shaped pressure plates in the guide assembly are each connected to a rotatable pulley, and the two pulleys roll and adhere to the lower outer wall of the two guide flanges respectively.

[0012] Preferably, the feed valve further includes a first limiting strip and a second limiting strip, which are respectively fixed along the axial direction of the moving semi-cylinder to the upper edge of the outer wall of the arc surface of the moving semi-cylinder and the upper part of the outer wall of the arc surface of the moving semi-cylinder, and are both used for limiting the movement.

[0013] Preferably, when the first limiting strip is attached to the upper edge of the rectangular discharge hole, the outer plane of the movable semi-cylinder faces the interior of the cuboid measuring cylinder and is parallel to the front inner wall of the cuboid measuring cylinder.

[0014] Preferably, when the second limiting strip is attached to the lower edge of the rectangular discharge hole, the lower edge of the movable semi-cylinder is tangent to the outer arc surface of the fixed semi-cylinder so that the outer plane of the movable semi-cylinder is set upward and inclined with a lower front and higher back.

[0015] Compared with the prior art, the advantages of the present invention are as follows: This invention utilizes a feed valve and a discharge valve to automatically open and close the upper and lower openings of a rectangular measuring cylinder, respectively. By simply placing the rectangular measuring cylinder below the falling particles and setting the required sampling volume, particle sampling can be completed quickly and accurately without relying on manual operation by staff. It also effectively prevents excess particles from remaining inside the rectangular measuring cylinder and being carried out, thus simplifying the operation process and achieving time and labor savings. This not only improves work efficiency but also greatly facilitates use. Attached Figure Description

[0016] The above and other features, advantages, and aspects of the embodiments of this application will become more apparent when taken in conjunction with the accompanying drawings and the following detailed description; throughout the drawings, the same or similar reference numerals denote the same or similar elements; it should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale; in the drawings: Figure 1This is an exploded structural diagram of the right front side of the present invention; Figure 2 This is a right-side cross-sectional view of the feed valve of the present invention when it is open; Figure 3 This is a right-side cross-sectional view of the feed valve of the present invention when it is closed; Figure 4 This is an exploded structural diagram of the left rear side of the present invention. Detailed Implementation

[0017] The embodiments of this application will now be described in more detail with reference to the accompanying drawings. Although some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the accompanying drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0018] It should be understood that the various steps described in the method embodiments of this application may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown, and the scope of this application is not limited in this respect.

[0019] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the relevant definitions of other terms will be given in the description below.

[0020] It should be noted that the concepts of "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0021] It should be noted that the terms "a" and "a plurality of" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0022] like Figures 1-4 As shown, a particulate matter sampling device includes a vertically arranged rectangular measuring cylinder 1 and a discharge valve 2 located at the lower opening of the rectangular measuring cylinder 1. A rectangular discharge hole 101 that communicates with the interior of the rectangular measuring cylinder 1 is provided on the front outer wall of the rectangular measuring cylinder 1. It also includes a feed valve 3 for sealing the upper opening of the rectangular measuring cylinder 1 and cooperating with the rectangular discharge hole 101. The feed valve 3 includes a fixed semi-cylinder 31 that is horizontally fixed on the inner wall of the rear side of the cuboid measuring cylinder 1 and a movable semi-cylinder 32 that is horizontally and rotatably connected to the rectangular discharge hole 101 and is parallel to the fixed semi-cylinder 31. The outer walls of the left and right ends of the movable semi-cylinder 32 are slidably attached to the inner walls of the left and right sides of the cuboid measuring cylinder 1, respectively, and the arc-shaped outer wall of the movable semi-cylinder 32 is slidably attached to the upper and lower edges of the rectangular discharge hole 101. The radius of the fixed semi-cylinder 31 and the radius of the movable semi-cylinder 32 are matched. When the lower edge of the movable semi-cylinder 32 is tangent to the outer wall of the arc surface of the fixed semi-cylinder 31, the outer wall of the movable semi-cylinder 32 is set upward and is inclined with the front lower and the back higher. The feed valve 3 also includes a first traction cylinder 35 fixed on the front outer wall of the cuboid measuring cylinder 1, a U-shaped traction bar 36 horizontally fixed on the telescopic end of the first traction cylinder 35, two first gears 33 respectively concentrically fixed at the left and right ends of the movable semi-cylinder 32 and located on the left and right sides of the cuboid measuring cylinder 1, and two first linear racks 34 respectively slidingly connected to the left and right outer walls of the cuboid measuring cylinder 1 in the up and down direction and meshing with the two first gears 33. The telescopic end of the first traction cylinder 35 is set vertically upward, and both ends of the U-shaped traction bar 36 are set backward and fixed on the two first linear racks 34 respectively.

[0023] The feed valve 3 also includes two detection units symmetrically arranged on the left and right sides of the cuboid measuring cylinder 1. The detection unit includes an adjusting strip 37 vertically fixed on the outer wall of the left or right side of the cuboid measuring cylinder 1, several position sensors 38 fixed on the adjusting strip 37 and arranged sequentially from top to bottom, all of which can be adjusted up and down to a fixed height, and several transparent covers 39 embedded in the outer wall of the left or right side of the cuboid measuring cylinder 1. The number of transparent covers 39 is equal to the number of position sensors 38. The height of each transparent cover 39 is matched with the height of a corresponding position sensor 38. The sensing end of each position sensor 38 is arranged horizontally and towards the transparent cover 39 to detect the height of the particles inside the cuboid measuring cylinder 1 in real time.

[0024] The discharge valve 2 includes a valve plate 21 that is horizontally arranged and slidably connected to the lower opening of the cuboid measuring cylinder 1, a swing frame 22 that is rotatably connected to the bottom of the valve plate 21, two inverted V-shaped swing plates 23 that are symmetrically arranged on the left and right sides of the valve plate 21, two extension arms 25 that are fixed to the middle of the two V-shaped swing plates 23 and symmetrically arranged on the left and right sides, and a rotating shaft 26 that is horizontally and rotatably connected to the rear outer wall of the cuboid measuring cylinder 1. The ends of the two extension arms 25 are fixed to the rotating shaft 26, and the rear ends of the two V-shaped swing plates 23 are rotatably connected to the ends of the swing frame 22. The front edge of the valve plate 21 is provided with a discharge groove 2101 that cooperates with the lower opening of the cuboid measuring cylinder 1.

[0025] The discharge valve 2 also includes a second gear 27 concentrically mounted and fixed outside the rotating shaft 26, a second linear rack 28 slidably connected to the rear outer wall of the cuboid measuring cylinder 1 and meshing with the second gear 27, and a second traction cylinder 24 fixed to the rear outer wall of the cuboid measuring cylinder 1 and located above the second linear rack 28. The extension end of the second traction cylinder 24 is vertically downward and fixed to the second linear rack 28.

[0026] The discharge valve 2 also includes two return springs 29 symmetrically arranged on the left and right sides of the rectangular measuring cylinder 1. The upper ends of the two return springs 29 can be detachably fixed on the outer walls of the left and right sides of the rectangular measuring cylinder 1, and the lower ends of the two return springs 29 can be detachably fixed on the front ends of the two V-shaped swing plates 23.

[0027] A guide assembly 4 is also provided between the rectangular measuring cylinder 1 and the discharge valve 2. The guide assembly 4 includes a base plate 41 that is horizontally fixed to the lower end of the rectangular measuring cylinder 1, two T-shaped pressure plates 42 that are symmetrically arranged on the left and right sides of the rectangular measuring cylinder 1, and a pressure rod 43 that is horizontally fixed between the rear ends of the two T-shaped pressure plates 42 and elastically connected to the rear outer wall of the rectangular measuring cylinder 1 in the vertical direction so as to always have an upward movement tendency. The base plate 41 has a discharge hole 411 located below the lower opening of the rectangular measuring cylinder 1. The front ends of the two T-shaped pressure plates 42 are rotatably connected to the base plate 41. The valve plate 21 is slidably connected to the bottom of the base plate 41 in the front-back direction. The lower ends of the two T-shaped pressure plates 42 are movably connected to the left and right sides of the valve plate 21, respectively.

[0028] On the outer walls of both sides of the valve plate 21, a horizontally arranged guide flange 2102 is formed. Correspondingly, the lower ends of the two T-shaped pressure plates 42 in the guide assembly 4 are each connected to a rotatable pulley 48. The two pulleys 48 roll and adhere to the lower outer walls of the two guide flanges 2102 respectively.

[0029] A U-shaped baffle plate 210 is also fixed on the bottom outer wall of the valve plate 21, which is horizontally arranged and located below the material discharge groove 2101. The opening of the U-shaped baffle plate 210 faces forward, and the lower left and right edges of the U-shaped baffle plate 210 each form a downward-facing and inclined bent edge 211.

[0030] The guide assembly 4 also includes a support 45 fixed on the rear outer wall of the cuboid measuring cylinder 1, a transmission rod 44 slidably connected to the support 45 in the vertical direction, a nut 47 sleeved and screwed to the upper end of the transmission rod 44, and a guide spring 46 sleeved on the outside of the transmission rod 44 and located between the nut 47 and the top of the support 45 and always in a compressed state. The lower end of the transmission rod 44 is rotatably connected to the pressure rod 43.

[0031] A horizontally arranged top plate 5 is fixed at the upper opening of the rectangular measuring cylinder 1, and a feed hole 51 is opened in the top plate 5 above the upper opening of the rectangular measuring cylinder 1.

[0032] The feed valve 3 also includes a first limiting strip 311 and a second limiting strip 310, which are respectively fixed along the axial direction of the moving semi-cylinder 32 to the upper edge of the outer wall of the arc surface of the moving semi-cylinder 32 and the upper part of the outer wall of the arc surface of the moving semi-cylinder 32, and are both used for limiting.

[0033] When the first limiting strip 311 is attached to the upper edge of the rectangular discharge hole 101, the outer plane of the movable semi-cylinder 32 is set towards the interior of the cuboid measuring cylinder 1 and parallel to the front inner wall of the cuboid measuring cylinder 1.

[0034] When the second limiting strip 310 is attached to the lower edge of the rectangular discharge hole 101, the lower edge of the movable semi-cylinder 32 is tangent to the outer arc surface of the fixed semi-cylinder 31 so that the outer plane of the movable semi-cylinder 32 is set upward and is inclined with the front lower and the back higher.

[0035] Working principle: The end opening of the discharge pipe is located above the top opening of the hopper. When feeding is started, the discharge pipe will drop the particles into the hopper. When sampling, the sampling device of the present invention is placed inside the hopper and above the end opening of the discharge pipe. Some of the falling particles will gradually enter the interior of the cuboid measuring cylinder 1 through the feed hole 51 on the top plate 5 and the upper opening of the cuboid measuring cylinder 1. At this time, the discharge groove 2101 on the valve plate 21 of the discharge valve 2 is located in front of the lower opening of the cuboid measuring cylinder 1, so that the top outer wall of the valve plate 21 is attached to the bottom outer wall of the bottom plate 41 to seal the discharge hole 411, thereby preventing the particles from being released outward.

[0036] The sampling amount of particulate matter is set as needed. The sampling amount is set by controlling the height of the particulate matter inside the cuboid measuring cylinder 1. The height of the particulate matter inside the cuboid measuring cylinder 1 is detected by two detection units. When the height of the particulate matter inside the cuboid measuring cylinder 1 reaches the position of one of the transparent covers 39 of the two detection units, the sensing end of the position sensor 38 at the same height will detect the particulate matter and then start the feed valve 3 to prevent the particulate matter from continuing to enter the cuboid measuring cylinder 1.

[0037] When the feed valve 3 is open, the outer plane of the movable semi-cylinder 32 faces the interior of the cuboid measuring cylinder 1 and is parallel to the front inner wall of the cuboid measuring cylinder 1. The space between the arc-shaped outer wall of the fixed semi-cylinder 31 and the front inner wall of the cuboid measuring cylinder 1 allows particles to fall. At this time, the first limiting strip 311 is attached to the upper edge of the rectangular discharge hole 101. When the position sensor 38 sends a signal to the first traction cylinder 35 in the feed valve 3 to extend its extension end outward, the two first linear racks 34 are driven to move upward by the U-shaped traction strip 36. Thus, the movable semi-cylinder 32 is driven to rotate counterclockwise by the two first gears 33, so that the lower part of the movable semi-cylinder 32 gradually enters the interior of the cuboid measuring cylinder 1 and gradually approaches the fixed semi-cylinder 31.

[0038] Since it takes time to remove the sampling device after sampling, or it can only be removed after the material is discharged, and since there is a certain distance between the feed valve 3 and the upper opening of the cuboid measuring cylinder 1, even if the feed valve 3 is closed, there will still be a certain amount of particulate matter remaining between the upper opening of the cuboid measuring cylinder 1 and the feed valve 3. Therefore, after the sampling device is removed, the above-mentioned residual particulate matter must be taken out, which is quite troublesome.

[0039] The feature of this invention is that when the second limiting strip 310 is attached to the lower edge of the rectangular discharge hole 101, the lower edge of the moving semi-cylinder 32 is tangent to the outer arc surface of the fixed semi-cylinder 31, so that the outer plane of the moving semi-cylinder 32 is set upward and inclined with the front lower and the back higher. At this time, although the falling particles can continue to enter the upper opening of the cuboid measuring cylinder 1, the particles will be blocked by the outer plane of the moving semi-cylinder 32 after entering, and then slide along the slope of the outer plane of the moving semi-cylinder 32 towards the rectangular discharge hole 101, so as to fall outward through the rectangular discharge hole 101 back into the hopper, thereby preventing the particles that continue to enter the cuboid measuring cylinder 1 from remaining inside the cuboid measuring cylinder 1.

[0040] After the sampling device is removed from the hopper, the obtained particles need to be discharged. During discharge, the extension end of the second traction cylinder 24 in the discharge valve 2 extends outward to drive the second linear rack 28 to move downward. Then, the second gear 27 drives the rotating shaft 26 to rotate counterclockwise. This causes the two extended arms 25 to drive the two V-shaped swing plates 23 to rotate counterclockwise as well. Then, the swing frame 22 drives the valve plate 21 to move backward, so that the discharge groove 2101 is located below the discharge hole 411. This allows the particles inside the cuboid measuring cylinder 1 to be discharged downward through the lower opening of the cuboid measuring cylinder 1, the discharge hole 411, and the discharge groove 2101. Both return springs 29 are pulled during the above process.

[0041] Since the pressure rod 43 in the guide assembly 4 is elastically connected to the rear outer wall of the cuboid measuring cylinder 1 in the vertical direction and always has an upward tendency, the two T-shaped pressure plates 42 will always generate an upward pulling force on the two pulleys 48. In turn, the guide flange 2102 on the valve plate 21 will always generate an upward pulling force on the valve plate 21. As a result, the top outer wall of the valve plate 21 will always be in contact with the bottom outer wall of the base plate 41 during the sliding process, which not only plays a sealing role, but also ensures the horizontality and stability of the movement of the valve plate 21.

[0042] Before the material is discharged and reused, the telescopic end of the first traction cylinder 35 in the feed valve 3 is retracted inward to drive the movable semi-cylinder 32 to rotate clockwise, thereby causing the lower part of the movable semi-cylinder 32 to leave the fixed semi-cylinder 31 and gradually exit the interior of the cuboid measuring cylinder 1 until the first limit strip 311 is attached to the upper edge of the rectangular discharge hole 101. At this time, the outer wall of the movable semi-cylinder 32 faces the interior of the cuboid measuring cylinder 1 and is parallel to the front inner wall of the cuboid measuring cylinder 1, so that the particles can fall smoothly to the bottom of the cuboid measuring cylinder 1. At the same time, the telescopic end of the second traction cylinder 24 is also driven to retract inward to drive the valve plate 21 to move forward, until the discharge groove 2101 is located in front of the lower opening of the cuboid measuring cylinder 1, thereby causing the top outer wall of the valve plate 21 to be attached to the bottom outer wall of the bottom plate 41 to seal the discharge hole 411, thereby preventing the particles from being discharged outward.

[0043] This invention utilizes the feed valve 3 and the discharge valve 2 to automatically open and close the upper and lower openings of the rectangular measuring cylinder 1, respectively. By simply placing the rectangular measuring cylinder 1 under the falling particles and setting the required sampling amount, particle sampling can be completed quickly and accurately without relying on manual operation by staff. It can also effectively prevent excess particles from remaining inside the rectangular measuring cylinder 1 and being carried out, thereby simplifying the operation process and achieving the effect of saving time and effort. This not only improves work efficiency but also greatly facilitates use.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these 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 the present invention.

Claims

1. A particulate matter sampling device, comprising a vertically arranged rectangular graduated cylinder and a discharge valve disposed at the lower opening of the rectangular graduated cylinder, characterized in that: The rectangular discharge hole, which communicates with the interior of the rectangular measuring cylinder, is provided on the front outer wall of the rectangular measuring cylinder. It also includes a feed valve for sealing the upper opening of the rectangular measuring cylinder and cooperating with the rectangular discharge hole. The feed valve includes a fixed semi-cylinder that is horizontally fixed on the inner wall of the rear side of the cuboid measuring cylinder and a movable semi-cylinder that is horizontally and rotatably connected to the rectangular discharge hole and is parallel to the fixed semi-cylinder. The outer walls of the left and right ends of the movable semi-cylinder are slidably attached to the inner walls of the left and right sides of the cuboid measuring cylinder, respectively, and the arc-shaped outer wall of the movable semi-cylinder is slidably attached to the upper and lower edges of the rectangular discharge hole. The radius of the fixed semi-cylinder and the radius of the movable semi-cylinder are matched. When the lower edge of the movable semi-cylinder is tangent to the outer wall of the arc surface of the fixed semi-cylinder, the outer wall of the movable semi-cylinder is set upward and is inclined with the front lower and the back higher. The feed valve also includes a first traction cylinder fixed on the front outer wall of the cuboid measuring cylinder, a U-shaped traction bar horizontally fixed on the telescopic end of the first traction cylinder, two first gears respectively concentrically fixed at the left and right ends of the movable semi-cylinder and located on the left and right sides of the cuboid measuring cylinder, and two first linear racks respectively slidably connected to the left and right outer walls of the cuboid measuring cylinder in the vertical direction and meshing with the two first gears. The telescopic end of the first traction cylinder is set vertically upward, and both ends of the U-shaped traction bar are set backward and fixed on the two first linear racks respectively.

2. The particulate matter sampling device according to claim 1, characterized in that, The feed valve also includes two detection units symmetrically arranged on the left and right sides of the rectangular measuring cylinder. Each detection unit includes an adjusting strip vertically fixed to the outer wall of the left or right side of the rectangular measuring cylinder, several position sensors fixed on the adjusting strip and arranged sequentially from top to bottom, each of which can be adjusted vertically to a fixed height, and several transparent covers embedded in the outer wall of the left or right side of the rectangular measuring cylinder. The number of transparent covers is equal to the number of position sensors. The height of each transparent cover is matched with the height of a corresponding position sensor. The sensing end of each position sensor is arranged horizontally and towards the transparent cover to detect the height of the particulate matter inside the rectangular measuring cylinder in real time.

3. The particulate matter sampling device according to claim 1, characterized in that, The discharge valve includes a valve plate that is horizontally arranged and slidably connected to the lower opening of the cuboid measuring cylinder in the front-back direction, a swing frame that is rotatably connected to the bottom of the valve plate, two inverted V-shaped swing plates that are symmetrically arranged on the left and right sides of the valve plate, two extension arms that are fixed to the middle of the two V-shaped swing plates and symmetrically arranged on the left and right sides, and a rotating shaft that is horizontally and rotatably connected to the rear outer wall of the cuboid measuring cylinder. The ends of the two extension arms are fixed to the rotating shaft, and the rear ends of the two V-shaped swing plates are rotatably connected to the ends of the swing frame. The front edge of the valve plate has a discharge groove that cooperates with the lower opening of the cuboid measuring cylinder.

4. The particulate matter sampling device according to claim 3, characterized in that, The discharge valve also includes a second gear concentrically mounted and fixed outside the rotating shaft, a second linear rack slidably connected to the rear outer wall of the cuboid measuring cylinder and meshing with the second gear, and a second traction cylinder fixed to the rear outer wall of the cuboid measuring cylinder and located above the second linear rack. The telescopic end of the second traction cylinder is vertically downward and fixed to the second linear rack.

5. A particulate matter sampling device according to claim 4, characterized in that, The discharge valve also includes two return springs symmetrically arranged on the left and right sides of the rectangular measuring cylinder. The upper ends of the two return springs are detachably fixed to the outer walls of the left and right sides of the rectangular measuring cylinder, and the lower ends of the two return springs are detachably fixed to the front ends of the two V-shaped swing plates.

6. A particulate matter sampling device according to claim 3, characterized in that, A guide assembly is also provided between the cuboid measuring cylinder and the discharge valve. The guide assembly includes a base plate that is horizontally fixed to the lower end of the cuboid measuring cylinder, two T-shaped pressure plates that are symmetrically arranged on the left and right sides of the cuboid measuring cylinder, and a pressure rod that is horizontally fixed between the rear ends of the two T-shaped pressure plates and elastically connected to the rear outer wall of the cuboid measuring cylinder in the vertical direction so as to always have an upward movement tendency. The base plate has a discharge hole located below the opening at the lower end of the cuboid measuring cylinder. The front ends of the two T-shaped pressure plates are rotatably connected to the base plate. The valve plate is slidably connected to the bottom of the base plate in the front-back direction. The lower ends of the two T-shaped pressure plates are movably connected to the left and right sides of the valve plate, respectively.

7. A particulate matter sampling device according to claim 6, characterized in that, The valve plate has a horizontally arranged guide flange on both the left and right outer walls. Correspondingly, the lower ends of the two T-shaped pressure plates in the guide assembly are each connected to a rotatable pulley, and the two pulleys roll and fit against the lower outer walls of the two guide flanges.

8. A particulate matter sampling device according to claim 1, characterized in that, The feed valve also includes a first limiting strip and a second limiting strip, which are respectively fixed along the axial direction of the moving semi-cylinder to the upper edge of the outer wall of the arc surface of the moving semi-cylinder and the upper part of the outer wall of the arc surface of the moving semi-cylinder, and are both used for limiting the movement.

9. A particulate matter sampling device according to claim 8, characterized in that, When the first limiting strip is attached to the upper edge of the rectangular discharge hole, the outer plane of the movable semi-cylinder faces the inside of the cuboid measuring cylinder and is parallel to the front inner wall of the cuboid measuring cylinder.

10. A particulate matter sampling device according to claim 8, characterized in that, When the second limiting strip is attached to the lower edge of the rectangular discharge hole, the lower edge of the moving semi-cylinder is tangent to the outer arc surface of the fixed semi-cylinder, so that the outer plane of the moving semi-cylinder is set upward and inclined with the front lower and the back higher.

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