High negative pressure environment air particulate matter sampler

Abstract

The utility model discloses a high negative pressure environment air particulate matter sampler, and belongs to the technical field of environment monitoring equipment, the high negative pressure environment air particulate matter sampler comprises a sampler body, the sampler body is communicated with a sampling head, the sampling head is in threaded connection with the sampler body, and one side of the sampler body is provided with a display screen and operation keys. The device has the effect of improving the dismounting and mounting efficiency of the filter membrane of the sampler.

Description

Technical Field

[0001] This application relates to the field of environmental monitoring equipment technology, and in particular to a high negative pressure ambient air particulate matter sampler. Background Technology

[0002] High negative pressure ambient air particulate matter samplers are instruments used to collect atmospheric pollutants or polluted air. They play a very good role in detecting harmful substances in the air and environment, and are often used for sampling air particulate matter in high negative pressure environments.

[0003] Currently, high negative pressure ambient air particulate matter samplers are widely used in the field of environmental monitoring, but they generally suffer from problems such as inconvenient filter replacement and difficulty in timely monitoring of filter condition. Existing technologies typically use the traditional filter membrane weighing method for particulate matter sampling, but replacing the filter membrane requires disassembling multiple parts, which is cumbersome.

[0004] Therefore, how to design a high negative pressure ambient air particulate matter sampler that allows for quick disassembly and installation of the filter membrane has become an urgent problem to be solved in this field. Utility Model Content

[0005] To improve the efficiency of sampler filter membrane disassembly and installation, this application provides a high negative pressure ambient air particulate matter sampler.

[0006] The high negative pressure ambient air particulate matter sampler provided in this application adopts the following technical solution:

[0007] A high negative pressure ambient air particulate matter sampler includes a sampler body, a sampling head connected to the sampler body via a thread, a first auxiliary cover and a second auxiliary cover inserted into the surface of the sampling head, both the first and second auxiliary covers having insertion rods at their bottoms, and a fixing slot for insertion of the insertion rods at the top of the sampling head. Both the first and second auxiliary covers are semi-disc-shaped and have air holes on their surfaces. Inside the sampling head, from top to bottom, are arranged a filter membrane clamp cover, a first filter membrane, a first support mesh, a second filter membrane, and a second support mesh. The filter membrane clamp consists of a support mesh pad and a filter membrane clamp bottom cover. Several sets of connecting rods are provided at the bottom of the filter membrane clamp top cover. The filter membrane clamp top cover, the first filter membrane, the first support mesh pad, the second filter membrane, the second support mesh pad, and the filter membrane clamp bottom cover are connected together via the connecting rods. Both the filter membrane clamp top cover and the filter membrane clamp bottom cover have a mesh-like surface. Pull ropes are fixedly connected to the lower surfaces of the first auxiliary cover and the second auxiliary cover. Guide blocks are provided on both sides of the filter membrane clamp bottom cover. The ends of the pull ropes are fixedly connected to the guide blocks. A guide groove is provided on the inner wall of the sampling head for sliding cooperation with the guide blocks. A display screen and operation buttons are provided on one side of the sampler body.

[0008] By adopting the above technical solution, the operator first places the sampler body in a specific sampling position. The first and second auxiliary covers, which are inserted into the upper surface of the sampling head, can seal the upper opening of the sampling head. At this time, the plug-in rod and the fixed slot are engaged. Then, the operator can operate the sampler to perform the sampling work through the operation buttons and the display screen. When the operator needs to replace the internal filter membrane, he only needs to remove the first and second auxiliary covers from the upper surface of the sampling head. The first and second auxiliary covers move the guide block in the guide groove through the pull rope, thereby exposing the upper and lower filter membrane clamp covers from inside the sampling head. At this time, the operator can replace and install the first and second filter membranes, which facilitates the operator to quickly disassemble and install the filter membrane. The air holes on the first and second auxiliary covers prevent the internal structure of the sampling head from falling out while facilitating ventilation inside the sampling head.

[0009] Preferably, a counterweight ring is fixedly connected to the upper surface of the filter membrane clamp cover.

[0010] By adopting the above technical solution, the counterweight ring is set to press the surface of the filter membrane clip upper cover, thereby facilitating the pressing of the filter membrane clip upper cover and the filter membrane clip lower cover together into the sampler body.

[0011] Preferably, the first auxiliary cover has a protrusion on its end face near the second auxiliary cover, and the second auxiliary cover has a groove that mates with the protrusion.

[0012] By adopting the above technical solution, the design of the first auxiliary cover protrusion and the second auxiliary cover groove makes the connection between the two tighter, avoiding the possibility of falling off during use.

[0013] Preferably, a roller is rotatably engaged at the top of the guide groove, and the outer wall of the roller abuts against the pull rope.

[0014] By adopting the above technical solution, the movement of the first auxiliary cover and the second auxiliary cover drives the pull rope to move, and the movement of the pull rope drives the roller to rotate. The roller provides support for the movement of the pull rope and reduces the friction when the pull rope moves.

[0015] Preferably, the top of the sampling head is provided with a rain cover, and the first auxiliary cover and the second auxiliary cover are provided with a number of fixing rods. The inner top wall of the rain cover is provided with a positioning slot that is inserted and matched with the fixing rods, and a number of air inlets are formed between the number of fixing rods.

[0016] By adopting the above technical solution, air sampling is carried out using the air inlet formed by the rain cover and the fixed rod, which makes it easier for operators to avoid rainwater entering the sampler body through the sampling head and thus interfering with the experimental data.

[0017] Preferably, the sampler body has several ventilation holes on its side wall.

[0018] By adopting the above technical solution, the ventilation holes facilitate the operation of the sampler body for air exchange.

[0019] Preferably, a dust shield is provided at the vent.

[0020] By adopting the above technical solution, the dust cover can effectively prevent external dust from entering the sampler body through the ventilation holes, thereby preventing interference with the sampler body.

[0021] Preferably, the top surface of the sampler body is symmetrically provided with two sets of pull rods.

[0022] By adopting the above technical solution, the design of the lever makes it easier for operators to move the sampler body.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The operator first places the sampler body at the designated sampling position. The first and second auxiliary covers, which are inserted into the upper surface of the sampling head, seal the upper opening of the sampling head. At this time, the connecting rod and the fixed slot are engaged. Then, the operator can operate the sampler to perform the sampling work through the operation buttons and the display screen. When the operator needs to replace the internal filter membrane, simply remove the first and second auxiliary covers from the upper surface of the sampling head. The first and second auxiliary covers move the guide block in the guide groove through the pull rope, thereby exposing the upper and lower filter membrane clamp covers from inside the sampling head. At this time, the operator can replace and install the first and second filter membranes, which facilitates quick disassembly and installation of the filter membrane. The vents on the first and second auxiliary covers prevent the internal structure of the sampling head from falling out while allowing air to pass through the sampling head.

[0025] 2. The movement of the first auxiliary cover and the second auxiliary cover drives the pull rope to move, and the movement of the pull rope drives the roller to rotate. The roller is designed to provide support for the movement of the pull rope and reduce the friction when the pull rope moves.

[0026] 3. Air sampling is carried out using the air inlet formed by the rain cover and the fixing rod, which makes it easier for operators to prevent rainwater from entering the sampler body through the sampling head and thus interfering with the experimental data. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a high negative pressure ambient air particulate matter sampler according to an embodiment of this application.

[0028] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0029] Figure 3 This is a schematic diagram of the internal structure of the sampling head in an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the connector rod according to an embodiment of this application.

[0031] Figure 5 yes Figure 3 Enlarged diagram of point B in the middle.

[0032] Figure 6 yes Figure 3 Enlarged diagram of point C in the middle.

[0033] Reference numerals: 1. Sampler body; 11. Sampling head; 111. Fixing slot; 112. Guide groove; 12. First auxiliary cover; 121. Protrusion; 13. Second auxiliary cover; 131. Groove; 14. Air hole; 15. Connecting rod; 16. Display screen; 17. Operation button; 2. Filter membrane clamp upper cover; 21. First filter membrane; 22. First support mesh pad; 23. Second filter membrane; 24. Second support mesh pad; 25. Filter membrane clamp lower cover; 26. Connecting rod; 27. Pull rope; 28. Guide block; 3. Counterweight ring; 31. Roller; 32. Rain cover; 33. Fixing rod; 34. Positioning slot; 35. Ventilation hole; 36. Dust shield; 37. Pull rod. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0035] This application discloses a high-negative-pressure ambient air particulate matter sampler. (Refer to...) Figure 1 The high negative pressure ambient air particulate matter sampler includes a sampler body 1, with a sampling head 11 threadedly connected to the top of the sampler body 1. A pull rod 37 is located on the top of the sampler body 1, and a display screen 16 and operation buttons 17 are located on one side of the sampler body 1. The pull rod 37 facilitates the operator's movement of the sampler body 1, and the operator can use the operation buttons 17 and the display screen 16 to operate the sampler body 1 to collect and process air particulate matter.

[0036] Reference Figure 1 , Figure 2The sampler body 1 has several ventilation holes 35 on its side wall, and a dust cover 36 is installed at the ventilation opening. The ventilation holes 35 facilitate ventilation of the sampler body 1, and the dust cover 36 effectively prevents external dust from entering the sampler body 1 through the ventilation holes 35 and interfering with the sampler.

[0037] Reference Figure 3 The sampling head 11 contains, from top to bottom, a filter membrane clamp top cover 2, a first filter membrane 21, a first support mesh pad 22, a second filter membrane 23, a second support mesh pad 24, and a filter membrane clamp bottom cover 25. The surfaces of both the filter membrane clamp top cover 2 and the filter membrane clamp bottom cover 25 are mesh-like (not shown in the figure). A connecting rod 26 is fixedly connected to the bottom of the filter membrane clamp top cover 2. The connecting rod 26 is vertically arranged, and multiple sets of connecting rods 26 are provided. The filter membrane clamp top cover 2, the first filter membrane 21, the first support mesh pad 22, the second filter membrane 23, the second support mesh pad 24, and the filter membrane clamp bottom cover 25 are connected together by the connecting rod 26.

[0038] Reference Figure 3 , Figure 4 The sampling head 11 has a first auxiliary cover 12 and a second auxiliary cover 13 inserted into its surface. Both the first auxiliary cover 12 and the second auxiliary cover 13 are semi-circular and can be joined together to form a complete circle. Both the first auxiliary cover 12 and the second auxiliary cover 13 have air holes 14 on their surfaces. The end face of the first auxiliary cover 12 near the second auxiliary cover 13 has a protrusion 121, and the end face of the second auxiliary cover 13 near the first auxiliary cover 12 has a groove 131. The protrusion 121 and the groove 131 cooperate to make the connection between the first auxiliary cover 12 and the second auxiliary cover 13 tighter. A connecting rod 15 is fixedly connected to the bottom of both the first auxiliary cover 12 and the second auxiliary cover 13. The connecting rod 15 is rectangular, and a fixing slot 111 is provided on the sampling head 11. The inner wall of the fixing slot 111 slides and engages with the outer wall of the connecting rod 15. The insertion rod 15 and the fixed slot 111 make the connection between the first auxiliary cover 12 and the second auxiliary cover 13 and the sampling head 11 more stable.

[0039] Reference Figure 2 A counterweight ring 3 is fixedly connected to the upper surface of the filter membrane clamp cover 2. The counterweight ring 3 is set to press the surface of the filter membrane clamp cover 2, so as to facilitate pressing the filter membrane clamp cover 2 and the filter membrane clamp lower cover 25 into the sampler body 1 together.

[0040] Reference Figure 2 , Figure 5Pull ropes 27 are fixedly connected to the lower surfaces of the first auxiliary cover 12 and the second auxiliary cover 13. Guide blocks 28, rectangular in shape, are provided on both sides of the filter membrane clamp lower cover 25 and are fixedly connected to it. A guide groove 112 is provided on the inner wall of the sampling head 11 for sliding engagement with the guide blocks 28; the inner wall of the guide groove 112 slides against the outer wall of the guide blocks 28. One end of the pull rope 27 away from the first auxiliary cover 12 and the second auxiliary cover 13 is fixedly connected to the guide block 28. When the operator removes the first auxiliary cover 12 and the second auxiliary cover 13, the movement of the first auxiliary cover 12 and the second auxiliary cover 13 moves the pull rope 27, causing the guide block 28 to move within the guide groove 112. This, in turn, causes the filter membrane clamp upper cover 2 and the filter membrane clamp lower cover 25 to protrude from inside the sampling head 11, facilitating the replacement and installation of the first filter membrane 21 and the second filter membrane 23 by the operator.

[0041] Reference Figure 2 , Figure 6 A roller 31 is rotatably engaged at the top of the guide groove 112, and the outer wall of the roller 31 abuts against the pull rope 27. The movement of the first auxiliary cover 12 and the second auxiliary cover 13 drives the pull rope 27 to move, and the movement of the pull rope 27 drives the roller 31 to rotate. The roller 31 provides support for the movement of the pull rope 27 and reduces the friction when the pull rope 27 moves.

[0042] Reference Figure 1 , Figure 2 The sampling head 11 is equipped with a rain cover 32 on its top. Several fixing rods 33 are fixedly connected to the top of the first auxiliary cover 12 and the second auxiliary cover 13. A positioning slot 34 is opened on the inner top surface of the rain cover 32. The positioning slot 34 and the fixing rods 33 are inserted and matched, and several sets of air inlets are formed between the fixing rods 33 (not shown in the figure). Air sampling is carried out using the air inlets formed by the rain cover 32 and the fixing rods 33, which makes it easier for operators to avoid rainwater entering the sampler body 1 through the sampling head 11 and thus interfering with the experimental data.

[0043] The implementation principle of the high negative pressure ambient air particulate matter sampler in this application embodiment is as follows: The operator places the sampler body 1 at the sampling position using the pull rod 37. The first auxiliary cover 12 and the second auxiliary cover 13 on the top of the sampling head 11 can close the upper opening of the sampling head 11. At this time, the plug-in rod 15 is plugged into the fixing slot 111. Then, the operator fixes the rain cover 32 to the top of the sampling head 11 using the fixing rods 33 on the top of the first auxiliary cover 12 and the second auxiliary cover 13. Several sets of air inlets are formed between the fixing rods 33. The sampled air enters the sampler through the air inlets. Then, the operator can collect data from the sampler body 1 using the buttons and the display screen 16.

[0044] When the operator needs to replace the filter membrane, first remove the rain cover 32 from the top of the sampling head 11, then remove the first auxiliary cover 12 and the second auxiliary cover 13 from the top of the sampling head 11 and move the first auxiliary cover 12 and the second auxiliary cover 13. The first auxiliary cover 12 and the second auxiliary cover 13 drive the guide block 28 to move in the guide groove 112 through the pull rope 27 and the roller 31. The movement of the guide block 28 will expose the filter membrane clamp upper cover 2 and the filter membrane clamp lower cover 25 from the inside of the sampling head 11. At this time, the operator can replace and install the first filter membrane 21 and the second filter membrane 23, which facilitates the operator to quickly disassemble and install the filter membrane.

[0045] 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 high negative pressure ambient air particulate matter sampler, characterized in that: The sampler includes a sampler body (1), which is connected to a sampling head (11). The sampling head (11) is threadedly connected to the sampler body (1). A first auxiliary cover (12) and a second auxiliary cover (13) are inserted into the surface of the sampling head (11). A plug-in rod (15) is provided at the bottom of both the first auxiliary cover (12) and the second auxiliary cover (13). A fixing slot (111) for the plug-in rod (15) is provided at the top of the sampling head (11). Both the first auxiliary cover (12) and the second auxiliary cover (13) are semi-disc-shaped. Air holes (14) are provided on the surface of both the first auxiliary cover (12) and the second auxiliary cover (13). The inside of the sampling head (11) is arranged from top to bottom as follows: a filter membrane clamp cover (2), a first filter membrane (21), a first support mesh pad (22), a second filter membrane (23), a second support mesh pad (24), and a filter membrane clamp. The bottom of the filter membrane clamp upper cover (2) is provided with several sets of connecting rods (26). The filter membrane clamp upper cover (2), the first filter membrane (21), the first support mesh pad (22), the second filter membrane (23), the second support mesh pad (24) and the filter membrane clamp lower cover (25) are connected together by the connecting rods (26). The surfaces of the filter membrane clamp upper cover (2) and the filter membrane clamp lower cover (25) are both grid-shaped. The lower surfaces of the first auxiliary cover (12) and the second auxiliary cover (13) are fixedly connected with pull ropes (27). The filter membrane clamp lower cover (25) is provided with guide blocks (28) on both sides. The end of the pull rope (27) is fixedly connected to the guide block (28). The inner wall of the sampling head (11) is provided with a guide groove (112) for sliding cooperation of the guide block (28). The sampler body (1) is provided with a display screen (16) and operation buttons (17) on one side.

2. The high negative pressure ambient air particulate matter sampler according to claim 1, characterized in that: A counterweight ring (3) is fixedly connected to the upper surface of the filter membrane clamp cover (2).

3. The high negative pressure ambient air particulate matter sampler according to claim 1, characterized in that: The first auxiliary cover (12) has a protrusion (121) on its end face near the second auxiliary cover (13), and the second auxiliary cover (13) has a groove (131) that mates with the protrusion (121).

4. The high negative pressure ambient air particulate matter sampler according to claim 1, characterized in that: The top of the guide groove (112) is rotatably engaged with a roller (31), and the outer wall of the roller (31) abuts against the pull rope (27).

5. The high negative pressure ambient air particulate matter sampler according to claim 1, characterized in that: The sampling head (11) is provided with a rain cover (32) on top. The first auxiliary cover (12) and the second auxiliary cover (13) are provided with a number of fixing rods (33). The inner top wall of the rain cover (32) is provided with a positioning slot (34) that is inserted and cooperates with the fixing rods (33). A number of air inlets are formed between the fixing rods (33).

6. The high negative pressure ambient air particulate matter sampler according to claim 1, characterized in that: The sampler body (1) has several ventilation holes (35) on its side wall.

7. The high negative pressure ambient air particulate matter sampler according to claim 6, characterized in that: A dust shield (36) is provided at the ventilation hole (35).

8. The high negative pressure ambient air particulate matter sampler according to claim 1, characterized in that: The sampler body (1) has two sets of pull rods (37) symmetrically arranged on its top surface.

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